CN220544118U - Battery module, energy storage device and electric equipment - Google Patents

Abstract

The application provides a battery module, an energy storage device and electric equipment. The battery module comprises at least one battery monomer group, a fixed frame and a liquid cooling assembly, wherein each battery monomer group comprises a plurality of battery monomers, the fixed frame comprises a first bracket and a second bracket, and the first bracket and the second bracket are oppositely arranged; the first support comprises a first supporting structure and a first limiting structure, and the first limiting structure is convexly arranged on one side, facing the second support, of the first supporting structure; the second support comprises a second supporting structure and a second limiting structure, the second limiting structure is convexly arranged on one side, facing the first support, of the second supporting structure, the first supporting structure, the second supporting structure, the first limiting structure and the second limiting structure enclose an installation space, a plurality of battery monomers are arranged in the installation space, and the first limiting structure and the second limiting structure are propped against the outer side faces of the battery monomers in the installation space.

Description

Battery module, energy storage device and electric equipment

Technical Field

The application relates to the technical field of energy storage devices, in particular to a battery module, an energy storage device and electric equipment.

Background

In the battery module, a plurality of battery cells are generally fixed by a fixing frame. However, when a plurality of battery cells are assembled into a conventional fixing frame, the outer side surfaces of the plurality of battery cells are likely to be irregular, but the outer side surfaces of the plurality of battery cells are usually required to be kept regular, so that the assembly of the battery module is affected.

Disclosure of Invention

The embodiment of the application provides a battery module, an energy storage device and electric equipment for reducing the possibility of irregular outer side surfaces of battery units.

In a first aspect, embodiments of the present application provide a battery module, where the battery module includes at least one battery cell group, a fixing frame, and a liquid cooling assembly, each battery cell group includes a plurality of battery cells, the fixing frame includes a first bracket and a second bracket, and the first bracket and the second bracket are disposed opposite to each other; the first bracket comprises a first supporting structure and a first limiting structure, and the first limiting structure is convexly arranged on one side of the first supporting structure, which faces the second bracket; the second support comprises a second supporting structure and a second limiting structure, the second limiting structure is convexly arranged on one side, facing the first support, of the second supporting structure, the first supporting structure, the second supporting structure, the first limiting structure and the second limiting structure enclose an installation space, at least one battery monomer group is installed in the installation space, the first limiting structure abuts against the outer side faces of the battery monomers, and the second limiting structure abuts against the outer side faces of the battery monomers; and the liquid cooling assembly is fixed on at least one of the first supporting structure and the second supporting structure.

Because the first limit structure is propped against the outer side faces of the plurality of battery cells, the second limit structure is propped against the outer side faces of the plurality of battery cells, and the first limit structure and the second limit structure limit the plurality of battery cells, the flatness of the outer side faces of the plurality of battery cells is improved, and the outer side faces of the plurality of battery cells on the same side are approximately located on the same plane. Because the first support and the second support are arranged oppositely, the first support is provided with a first limit structure, the second support is provided with a second limit structure, and the possibility of inconsistent size of the battery module in the opposite direction of the first support and the second support is reduced in the opposite direction of the first support and the second support.

According to a first aspect, in one possible implementation manner of the present application, the first supporting structure includes a first supporting portion and a second supporting portion that are fixedly connected, the first supporting portion extends along a first direction, the second supporting portion extends along a second direction different from the first direction, and at least part of the first limiting structure is disposed on a side of the first supporting portion facing the second bracket and extends along the first supporting portion. Because the first limit structure extends at least partially along the first supporting portion, the first limit structure can limit the battery cells of the installation space in a direction different from the first direction.

According to a first aspect, in one possible implementation manner of the present application, the first limiting structure includes a first limiting portion and a second limiting portion, the first limiting portion is disposed on one side of the first supporting portion facing the second supporting portion and extends along the first supporting portion, the second limiting portion is disposed on an end portion of the second supporting portion, where the end portion meets the first supporting portion, and the second limiting portion is fixedly connected with the first limiting portion.

Because the first limiting part extends along the first supporting part, the first limiting part can limit the battery cell in the second direction. Because the second limiting part is positioned on the second supporting part, the second limiting part can limit the battery cell in the first direction. The first support limits the battery cells in the first direction and the second direction, and the possibility of deformation of the battery cells in the first direction and the second direction is reduced.

According to a first aspect, in a possible implementation manner of the present application, the inner wall of the first limiting portion facing the inside of the fixed frame and the inner wall of the first supporting portion facing the second bracket form a first included angle, and a range of the first included angle is [92 °,98 ° ].

The inner wall of first contained angle is the inclined plane, when passing through mounting locking with first support and a plurality of battery monomer, the inclined plane of first contained angle conveniently compresses tightly the battery monomer at the in-process that the lock was paid, reduces the possibility that the battery monomer rocked in fixed frame, has improved battery module's fail safe nature.

According to a first aspect, in a possible implementation manner of the present application, the first support structure further comprises a first reinforcement portion, and the first reinforcement portion is connected between the first support portion and the second support portion. The first reinforcement portion is used for reinforcing the strength of the first support structure.

According to a first aspect, in a possible implementation manner of the present application, the second support structure includes a third support portion and a fourth support portion that are fixedly connected, the third support portion extends along a first direction, the fourth support portion extends along a second direction, the third support portion is disposed opposite to the first support portion, and the second support portion is disposed opposite to the fourth support portion; at least part of the second limiting structure is arranged on one side of the third supporting portion, which faces the first bracket, and extends along the third supporting portion.

The second support and the first support are both provided with limiting structures in the first direction, so that the side surface of the plurality of battery cells along the first direction is neat and neat, and the battery cells are conveniently assembled on the fixed frame.

According to a first aspect, in one possible implementation manner of the present application, the second limiting structure includes a third limiting portion and a fourth limiting portion, the third limiting portion is disposed on one side of the third supporting portion facing the first bracket and extending along the third supporting portion, the fourth limiting portion is disposed on an end portion of the fourth supporting portion, where the end portion meets the third supporting portion, and the fourth limiting portion is fixedly connected with the third limiting portion.

Because the third limiting part extends along the third supporting part, the third limiting part can limit the battery cell in the second direction. Because the fourth limiting part is positioned on the fourth supporting part, the fourth limiting part can limit the battery cell in the first direction. The second support limits the battery cells in the first direction and the second direction, and the possibility of deformation of the battery cells in the first direction and the second direction is reduced.

According to a first aspect, in a possible implementation manner of the present application, the inner wall of the third limiting portion facing the inside of the fixed frame and the inner wall of the third supporting portion facing the first bracket form a second included angle, and a range of the second included angle is [92 °,98 ° ].

The battery monomer is placed in the fixed frame, the battery monomer is fixed in the fixed frame through the fixing piece (can be called as the process of locking), the inclined plane of the second included angle is convenient to compress the battery monomer in the process of locking, the possibility that the battery monomer shakes in the fixed frame is reduced, and the safety and reliability of the battery module are improved. In addition, the second contained angle is loudspeaker form guiding port, makes things convenient for battery monomer entering second support, and then has made things convenient for the equipment between battery monomer and the fixed frame.

According to a first aspect, in a possible implementation manner of the present application, the liquid cooling assembly is connected between the first supporting structure and the second supporting structure, the liquid cooling assembly divides the installation space into a first space and a second space, and the first space and the second space are both used for installing a plurality of battery cells of the battery module. The liquid cooling assembly is located between the battery monomer in the first space and the battery monomer in the second space, and can realize the simultaneous heat dissipation of the battery monomer in the first space and the battery monomer in the second space.

According to a first aspect, in one possible implementation manner of the present application, the first support further includes a first limiting bump and a second limiting bump, the first limiting bump and the second limiting bump are both convexly disposed on one side of the first support structure facing the second support, the first limiting bump and the second limiting bump are disposed at intervals, a first limiting groove is disposed on the first limiting bump, a second limiting groove is disposed on the second limiting bump, and the liquid cooling assembly is inserted in the first limiting groove and the second limiting groove. The liquid cooling assembly is connected with the first bracket and the second bracket in an inserting mode, so that the assembly and the disassembly among the liquid cooling assembly, the first bracket and the second bracket are convenient.

According to a first aspect, in one possible implementation manner of the present application, the first support and the second support are disposed opposite to each other along a third direction, the first limiting groove penetrates through the first limiting bump along a first direction different from the third direction, and an end portion, away from the first limiting bump, of the liquid cooling component abuts against an inner wall of the second limiting groove.

The first limiting groove is a through groove penetrating through the first limiting lug in the first direction, so that the limitation of the first bracket on the size of the liquid cooling assembly in the first direction can be reduced. The second limiting groove limits the position of the liquid cooling assembly on the first support, so that the possibility of movement of the liquid cooling assembly relative to the first support is reduced.

According to a first aspect, in one possible implementation manner of the present application, the liquid cooling component is provided with a first groove, a first limit protruding strip is provided on an inner wall of the first limit groove, and the first limit protruding strip is arranged in the first groove in a penetrating manner.

The first spacing sand grip is used for spacing the liquid cooling subassembly, reduces the relative first support of liquid cooling subassembly and takes place the possibility of removal, makes things convenient for the assembly between liquid cooling subassembly and the first support.

According to a first aspect, in a possible implementation manner of the present application, the liquid cooling assembly includes a liquid cooling plate and a heat conducting pad, and the liquid cooling plate is provided with the heat conducting pad towards one side of the first space and/or towards one side of the second space.

The heat conduction pad is used for improving heat exchange efficiency between the battery monomer and the liquid cooling plate in the installation space. In the process that the fixing piece locks the plurality of battery monomers on the fixing frame, the first limiting structure and the second limiting structure limit the battery monomers, so that the possibility of warping of the end part of the heat conducting pad caused by uneven outer side surfaces of the plurality of battery monomers is reduced. Because the possibility of warping of the heat conducting pad is reduced, the contact area of the heat conducting pad and the liquid cooling plate is increased, and the heat exchange efficiency between the liquid cooling assembly and the plurality of battery monomers is improved.

According to a first aspect, in a possible implementation manner of the present application, each battery unit group further includes two end plates, a plurality of battery units are located between the two end plates, a mounting hole is formed in the first support and the second support, and the mounting hole is used for penetrating a fixing piece, and the fixing piece is used for fixing the end plates and the fixing frame together.

In a second aspect, embodiments of the present application further provide an energy storage device, including a battery module according to the first aspect.

In a third aspect, embodiments of the present application further provide a powered device, including an energy storage device according to the second aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below.

Fig. 1 is a schematic view of a scenario of an energy storage device according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of a battery module according to an embodiment of the present application;

fig. 3 is an exploded perspective view of a fixing frame of the battery module shown in fig. 2;

FIG. 4 is a perspective cross-sectional view taken along line I-I of FIG. 2;

FIG. 5 is an enlarged schematic view of the partial area B1 of FIG. 4;

FIG. 6 is an enlarged schematic view of a partial region B2 of FIG. 4;

FIG. 7 is an enlarged schematic view of the partial area A1 of FIG. 3;

fig. 8 is an enlarged schematic view of a partial area A2 of fig. 3.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application.

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments that can be used to practice the present application. Directional terms referred to herein, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are merely directions referring to the attached drawings, and thus, directional terms are used for better, more clear description and understanding of the present application, rather than indicating or implying that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the numbering of the components itself, e.g., "first," "second," etc., herein is merely used to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

Because of the strong timeliness and space properties of energy required by people, in order to reasonably utilize the energy and improve the utilization rate of the energy, one energy form needs to be stored by one medium or equipment and then converted into another energy form, and the energy is released in a specific energy form based on future application. As is well known, to achieve the great goal of carbon neutralization, the main approach to green electric energy generation is to develop green energy sources such as photovoltaic, wind power and the like to replace fossil energy sources. At present, the generation of green electric energy generally depends on photovoltaic, wind power, water potential and the like, but wind energy, solar energy and the like generally have the problems of strong intermittence and large fluctuation, which can cause unstable power grid, insufficient peak electricity consumption, too much electricity consumption and unstable voltage can cause damage to the electric power, so that the problem of 'wind abandoning and light abandoning' possibly occurs due to insufficient electricity consumption requirement or insufficient power grid acceptance, and the problem needs to be solved by relying on energy storage. The energy is converted into other forms of energy through physical or chemical means and is stored, the energy is converted into electric energy when needed and released, in short, the energy storage is similar to a large-scale 'charge pal', the electric energy is stored when the photovoltaic and wind energy are sufficient, and the stored electric power is released when needed.

Taking electrochemical energy storage as an example, the present solution provides an energy storage device 1000, in which a chemical battery is disposed in the energy storage device 1000, and chemical elements in the chemical battery are mainly used as an energy storage medium, and a charging and discharging process is accompanied with chemical reaction or change of the energy storage medium.

The present energy storage (i.e. energy storage) application scenario is wider, including aspects such as power generation side energy storage, grid side energy storage, renewable energy grid-connected energy storage, user side energy storage, etc., the types of the corresponding energy storage device 1000 include:

(1) The large energy storage container applied to the energy storage scene at the power grid side can be used as a high-quality active and reactive power regulation power supply in the power grid, so that the load matching of electric energy in time and space is realized, the renewable energy consumption capability is enhanced, and the large energy storage container has great significance in the aspects of standby of a power grid system, relieving peak load power supply pressure and peak regulation and frequency modulation;

(2) The main operation modes of the small and medium-sized energy storage electric cabinet applied to the industrial and commercial energy storage scenes (banks, shops and the like) at the user side and the household small-sized energy storage box applied to the household energy storage scene at the user side are peak clipping and valley filling. Because of the large price difference of the electricity charge at the peak-valley position according to the electricity consumption requirement, after the energy storage equipment is arranged by a user, in order to reduce the cost, the energy storage cabinet/box is charged usually in the electricity price valley period; and in the peak period of electricity price, the electricity in the energy storage equipment is released for use, so that the purpose of saving electricity charge is achieved. In addition, in remote areas and areas with high occurrence of natural disasters such as earthquake, hurricane and the like, the household energy storage device is equivalent to the fact that a user provides a standby power supply for the user and the power grid, and inconvenience caused by frequent power failure due to disasters or other reasons is avoided.

In this embodiment, a household energy storage scene in user side energy storage is taken as an example for illustration, and fig. 1 is a schematic view of a scene of an energy storage device 1000 provided in this embodiment, where the energy storage device 1000 is not limited to the household energy storage scene.

As shown in fig. 1, the present application provides a household energy storage system, which includes an electric energy conversion device (photovoltaic panel 2000), a user load (street lamp 3000 a), a user load (household appliance 3000 b), and the like, and an energy storage device 1000, wherein the energy storage device 1000 is a small-sized energy storage box and can be installed on an outdoor wall in a wall hanging manner. Specifically, the photovoltaic panel 2000 may convert solar energy into electric energy during a low electricity price period, and the energy storage device 1000 is used for storing the electric energy and supplying the electric energy to electric devices such as the street lamp 3000a and the household appliance 3000b for use during a high electricity price period, or supplying power during a power failure/power outage of the power grid.

In some embodiments, a powered device includes an energy storage device 1000, the energy storage device 1000 powering the powered device.

Referring to fig. 2, an energy storage device 1000 includes a battery module 100 according to an embodiment of the present disclosure, where the battery module 100 includes a battery cell set 10, a fixing frame 30, and a liquid cooling assembly 35. The battery cell stack 10 is mounted in a fixed frame 30. The fixing frame 30 is used for supporting and carrying a plurality of battery cell packs 10. The liquid cooling assembly 35 is mounted on the fixed frame 30 for heat dissipation of the battery cell stack 10. The battery cell group 10 includes a plurality of battery cells 11 and two end plates 13. A plurality of battery cells 11 are located between two end plates 13. In the present embodiment, the number of the battery cell groups 10 is two. It is understood that the number of the battery cell groups 10 is not limited, and the number of the battery cell groups 10 may be one or more.

Referring to fig. 3, the fixing frame 30 includes a first bracket 31 and a second bracket 33. The first bracket 31 is disposed opposite to the second bracket 33. The first bracket 31 includes a first supporting structure 311 and a first limiting structure 313. The first limiting structure 313 is protruding from one side of the first supporting structure 311 facing the second bracket 33. The second bracket 33 includes a second supporting structure 331 and a second limiting structure 333. The second limiting structure 333 is protruding on a side of the second supporting structure 331 facing the first bracket 31. The first limiting structure 313 abuts against the outer side surfaces of the plurality of battery cells 11, and the second limiting structure 333 abuts against the outer side surfaces of the plurality of battery cells 11. The liquid cooling assembly 35 is fixed to at least one of the first support structure 311 and the second support structure 331.

The first supporting structure 311, the second supporting structure 331, the first limiting structure 313 and the second limiting structure 333 enclose an installation space 301. The battery cell stack 10 is mounted in the mounting space 301.

In the fixing frame 30 provided by the application, when the battery monomer set 10 is required to be installed in the installation space 301, the battery monomer set 10 is placed on the second bracket 33, the first bracket 31 is sleeved on one end of the battery monomer set 10 far away from the second bracket 33, and the end plate 13 of the battery monomer set 10 is fixed on the first bracket 31 and the second bracket 33 through the fixing piece, so that the fixing of a plurality of battery monomers 11 on the first bracket 31 and the second bracket 33 is realized.

On the fixed frame of common battery module, set up limit structure on the fixed frame, lead to a plurality of battery monomer to pack into fixed frame after, a plurality of battery monomer be located the outside face of same one side and be liable to appear the possibility of being irregular, a plurality of battery monomer be located the outside face of same one side of fixed frame promptly and be liable to appear the dislocation. Or, the limit structure is only arranged at one end of the fixed frame, so that after a plurality of battery cells are installed in the fixed frame and locked by the fixing piece, the size of one end of the battery module is smaller than that of the other end of the battery module, namely, the battery module approximately takes on a V-shaped structure.

Since the first limiting structure 313 abuts against the outer side surfaces of the plurality of battery cells 11, the second limiting structure 333 abuts against the outer side surfaces of the plurality of battery cells 11, and the first limiting structure 313 and the second limiting structure 333 limit the plurality of battery cells 11, the flatness of the outer side surfaces of the battery cell group 10 is improved, and the outer side surfaces of the plurality of battery cells 11 on the same side are approximately located on the same plane. Since the first bracket 31 and the second bracket 33 are disposed opposite to each other, the first bracket 31 is provided with the first limiting structure 313, and the second bracket 33 is provided with the second limiting structure 333, in the direction in which the first bracket 31 and the second bracket 33 are disposed opposite to each other, the possibility of inconsistent dimensions of the battery module 100 in the opposite directions of the first bracket 31 and the second bracket 33 is reduced.

The first support structure 311 includes a first support portion 3111, a second support portion 3113, and a first reinforcement portion 3115. The first support 3111 is fixedly connected to the second support 3113. The first support 3111 extends in a first direction. The second support 3113 extends in a second direction different from the first direction. In the present embodiment, the number of the first support portions 3111 is two, the number of the second support portions 3113 is two, the two first support portions 3111 are disposed opposite to each other in the first direction, the two second support portions 3113 are disposed opposite to each other in the second direction, and the two first support portions 3111 and the two second support portions 3113 define a square frame structure. The second support portion 3113 is provided with a mounting hole 3116 for penetrating a fixing member (not shown). When the battery cell group 10 is mounted in the mounting space 301, the fixing member is inserted through the mounting hole 3116 and fixedly connected with the end plate 13 of the battery cell group 10, thereby fixing the battery cell group 10 to the fixing frame 30. The first reinforcement part 3115 is connected between the two second support parts 3113 for reinforcing the strength of the first support structure 311. The first bracket 31 and the second bracket 33 are disposed opposite to each other in the third direction. The third direction is different from the first direction and the third direction is different from the second direction. For example, the first direction may be, but is not limited to, the X direction shown in fig. 3, the second direction may be, but is not limited to, the Y direction shown in fig. 3, and the third direction may be, but is not limited to, the Z direction shown in fig. 3. It is understood that the mounting hole 3116 on the first bracket 31 is not limited to being located on the second support portion 3113, and the mounting hole 3116 on the first bracket 31 may be located on other structures of the first bracket 31, for example, the mounting hole 3116 may be located on the first support portion 3111.

At least a portion of the first limiting structure 313 is disposed on a side of the first support portion 3111 facing the second bracket 33 and extends along the first support portion 3111. Since the first limiting structure 313 extends at least partially along the first support 3111, the first limiting structure 313 can limit the battery cell stack 10 of the installation space 301 in the second direction.

The first limiting structure 313 includes a first limiting portion 3131 and a second limiting portion 3133, the first limiting portion 3131 is convexly disposed on one side of the first support portion 3111 facing the second support 33 and extends along the first support portion 3111, the second limiting portion 3133 is convexly disposed on an end portion of the second support portion 3113, which is connected to the first support portion 3111, and the second limiting portion 3133 is fixedly connected to the first limiting portion 3131. Since the first stopper 3131 extends along the first support part 3111, the first stopper 3131 can stopper the battery cell group 10 of the installation space 301 in the second direction. Since the second stopper 3133 is positioned on the second support part 3113, the second stopper 3133 can stopper the battery cell group 10 of the installation space 301 in the first direction. The first support 31 defines the battery cell stack 10 in both the first direction and the second direction, which is beneficial to reducing the possibility of deformation of the battery cell stack 10 in the first direction and the second direction.

The height of the first spacing portion 3131 in the third direction is greater than the height of the second spacing portion 3133 in the third direction. It is understood that the height of the first spacing portion 3131 in the third direction is not limited to be greater than the height of the second spacing portion 3133 in the third direction.

As shown in fig. 4 and 5, the inner wall of the first limiting portion 3131 facing the installation space 301 and the inner wall of the first supporting portion 3111 facing the second bracket 33 form a first angle C1, and the range of the first angle C1 is [92 °,98 ° ]. The first contained angle C1 is non-right angle, and the inner wall of first contained angle C1 is the inclined plane, when locking first support 31 and battery unit group 10 through the mounting, the inclined plane of first contained angle C1 conveniently compresses tightly battery unit group 10 at the in-process of locking, reduces battery unit group 10 and rocks the possibility in fixed frame 30, has improved the fail safe nature of battery module 100. In addition, the first included angle C1 is a horn-shaped guiding opening, so that the battery unit 10 can enter the first bracket 31 conveniently, and the assembly between the battery unit 10 and the fixed frame 30 is convenient. It is understood that the present application does not limit the scope of the first included angle C1.

Referring to fig. 3 again, the second support structure 331 includes a third support portion 3311, a fourth support portion 3313 and a second reinforcing portion 3315 fixedly connected, the third support portion 3311 extends along a first direction, the fourth support portion 3313 extends along a second direction, the third support portion 3311 is disposed opposite to the first support portion 3111, and the second support portion 3113 is disposed opposite to the fourth support portion 3313. In the present embodiment, the number of the third supporting portions 3311 is two, the number of the fourth supporting portions 3313 is two, the two third supporting portions 3311 are oppositely disposed along the first direction, the two fourth supporting portions 3313 are oppositely disposed along the second direction, and the two third supporting portions 3311 and the two fourth supporting portions 3313 enclose a square frame structure. The fourth support portion 3313 is provided with a mounting hole 3116 for penetrating the fixing member. When the battery cell group 10 is mounted in the mounting space 301, the fixing member is inserted through the mounting hole 3116 of the second bracket 33 and fixedly connected with the end plate 13 of the battery cell group 10, thereby fixing the battery cell group 10 to the fixing frame 30. The second reinforcement part 3315 is connected between the two fourth support parts 3313 for reinforcing the strength of the second support structure 331. It is understood that the mounting hole 3116 on the second bracket 33 is not limited to being located on the fourth support portion 3313, and the mounting hole 3116 on the second bracket 33 may be located on other structures of the second bracket 33, for example, the mounting hole 3116 of the second bracket 33 may be located on the third support portion 3311.

At least a portion of the second limiting structure 333 is protruding on a side of the third supporting portion 3311 facing the first support 31 and extends along the third supporting portion 3311. The second support 33 and the first support 31 both have a limiting structure in the first direction, which is beneficial to improving the side surface regularity of the plurality of battery cell sets 10 along the first direction, and also facilitates the assembly of the battery cell sets 10 on the fixed frame 30.

The second limiting structure 333 includes a third limiting portion 3331 and a fourth limiting portion 3333, the third limiting portion 3331 is disposed on one side of the third supporting portion 3311 facing the first support 31 and extends along the third supporting portion 3311, the fourth limiting portion 3333 is disposed on an end portion of the fourth supporting portion 3313 contacting the third supporting portion 3311, and the fourth limiting portion 3333 is fixedly connected with the third limiting portion 3331. Since the third limiting portion 3331 extends along the third supporting portion 3311, the third limiting portion 3331 can limit the battery cells of the mounting space 301 in the second direction. Since the fourth limiting portion 3333 is positioned on the fourth supporting portion 3313, the fourth limiting portion 3333 can limit the battery cell stack 10 of the installation space 301 in the first direction. The second support 33 defines the battery cell stack 10 in both the first direction and the second direction, reducing the possibility of deformation of the battery cell stack 10 in both the first direction and the second direction.

As shown in fig. 4 and 6, the inner wall of the third limiting portion 3331 facing the installation space 301 and the inner wall of the third supporting portion 3311 facing the first bracket 31 form a second included angle C2, and the second included angle B ranges from [92 °,98 ° ]. The second included angle B is a non-right angle, and the inner wall of the second included angle C2 is an inclined plane. The second included angle C2 is a horn-shaped guide opening. In the process of putting the battery cell stack 10 into the fixed frame 30, penetrating the fixing member into the mounting hole 3116 and fixedly connecting with the battery cell stack 10 (may be referred to as a locking process), the inclined plane of the second included angle C2 facilitates compressing the battery cell stack 10 in the locking process, reduces the possibility of shaking of the battery cell stack 10 in the fixed frame 30, and improves the safety and reliability of the battery module 100. In addition, the second included angle C2 is a horn-shaped guiding opening, so that the battery unit 10 can enter the second bracket 33 conveniently, and the assembly between the battery unit 10 and the fixed frame 30 is convenient.

Referring again to fig. 3, the liquid cooling assembly 35 is connected between the second support portion 3113 of the first support structure 311 and the fourth support portion 3313 of the second support structure 331, and the liquid cooling assembly 35 divides the installation space 301 into a first space 3011 and a second space 3013. The first space 3011 and the second space 3013 are used to mount two battery cell groups 10 of the battery module 100, respectively. In other words, one cell group 10 is installed in the first space 3011, and the other cell group 10 is installed in the second space 3013. The liquid cooling assembly 35 is located between the battery cell stack 10 in the first space 3011 and the battery cell stack 10 in the second space 3013, so that heat dissipation can be performed on the battery cell stack 10 in the first space 3011 and the battery cell stack 10 in the second space 3013 at the same time.

The liquid cooling assembly 35 comprises a liquid cooling plate 351 and a heat conduction pad 353 arranged on the liquid cooling plate 351, wherein a circulation pipeline is arranged on the liquid cooling plate 351 and used for circulating heat exchange working media. The heat exchange working medium can be water and other heat exchange media. The side of the liquid cooling plate 351 facing the first space 3011 and the side of the liquid cooling plate 351 facing the second space 3013 are respectively provided with a heat conduction pad 353 for improving heat exchange efficiency between the battery cell stack 10 and the liquid cooling plate 351 in the installation space 301. In the process of locking the battery cell set 10 on the fixing frame 30 by the fixing member, the first limiting structure 313 and the second limiting structure 333 limit the battery cell set 10, so that the possibility of warping of the end portion of the heat conducting pad 353 caused by uneven outer side surfaces of the battery cell set 10 is reduced. Since the possibility of warping of the heat conducting pad 353 is reduced, the contact area between the heat conducting pad 353 and the liquid cooling plate 351 is increased, and the heat exchange efficiency between the liquid cooling assembly 35 and the battery cell stack 10 is improved. It is understood that the side of the liquid cooling plate 351 facing the first space 3011 or the side of the liquid cooling plate 351 facing the second space 3013 is provided with a heat conductive pad 353.

Referring to fig. 7, each of the first bracket 31 and the second bracket 33 further includes a first limiting protrusion 315, the first limiting protrusion 315 of the first bracket 31 is protruding on a side of the first support structure 311 of the first bracket 31 facing the second bracket 33, and the first limiting protrusion 315 of the second bracket 33 is protruding on a side of the second support structure 331 of the second bracket 33 facing the first bracket 31. Fig. 7 shows, by way of example only, that the second bracket 33 is provided with a first limit bump 315. In the present embodiment, the first limiting protrusion 315 of the first bracket 31 is protruding on one side of the second support portion 3113 of the first bracket 31 facing the second bracket 33, and the first limiting protrusion 315 of the second bracket 33 is protruding on one side of the fourth support portion 3313 of the second bracket 33 facing the first bracket 31. The first limiting protrusion 315 is provided with a first limiting groove 3151. The first confining tank 3151 is for connection to the liquid cooling assembly 35. The liquid cooling plate 351 is inserted into the first restricting groove 3151. The first restricting groove 3151 penetrates the first restricting projection 315 in the first direction, in other words, the first restricting groove 3151 is a through groove penetrating the first restricting projection 315 in the first direction, and the restriction of the first bracket 31 and the second bracket 33 to the liquid cooling module 35 in the first direction can be reduced.

The liquid cooling plate 351 is provided with a first groove 3513, the inner wall of the first limiting groove 3151 is provided with a first limiting raised line 3153, and the first limiting raised line 3153 penetrates through the first groove 3513 and abuts against the inner wall of the first groove 3513, that is, the first limiting raised line 3153 penetrates through the first groove 3513 and abuts against the liquid cooling plate 351. The first spacing protruding strip 3153 is used for spacing the liquid cooling assembly 35, reduces the possibility that the liquid cooling assembly 35 moves relative to the first support 31 and/or the second support 33, and facilitates assembly between the liquid cooling assembly 35 and the first support 31 and/or the second support 33.

Referring to fig. 8, the first bracket 31 and the second bracket 33 each further include a second limiting protrusion 317, the second limiting protrusion 317 of the first bracket 31 is protruding on a side of the first support structure 311 facing the second bracket 33, and the second limiting protrusion 317 of the second bracket 33 is protruding on a side of the second support structure 331 facing the first bracket 31. Fig. 8 shows only the second limiting projection 317 provided for the second bracket 33 by way of example. In the present embodiment, the second limiting bump 317 of the first bracket 31 is protruding on a side of the other second support portion 3113 of the first bracket 31 facing the second bracket 33, and the second limiting bump 317 of the second bracket 33 is protruding on a side of the other fourth support portion 3313 of the second bracket 33 facing the first bracket 31. The first limiting projection 315 of the first bracket 31 is disposed opposite to the second limiting projection 317 of the first bracket 31 in the first direction. The first limiting projection 315 of the second bracket 33 is disposed opposite to the second limiting projection 317 of the second bracket 33 in the first direction. The second restricting projection 317 is provided with a second restricting groove 3171, and the second restricting groove 3171 is connected to the liquid cooling plate 351 of the liquid cooling module 35. The liquid cooling plate 351 is inserted into the second restricting groove 3171. One end of the liquid cooling plate 351, which is far from the first limiting groove 3151 in the first direction, abuts against the inner wall of the second limiting groove 3171, and the second limiting groove 3171 limits the position of the liquid cooling assembly 35 on the first bracket 31, so that the possibility of movement of the liquid cooling assembly 35 relative to the first bracket 31 is reduced. It is understood that the heat conducting pad 353 may be omitted from the liquid cooling assembly 35, and the liquid cooling assembly 35 may be inserted into the first limiting groove 3151 and the second limiting groove 3171.

In the first direction, the liquid cooling plate 351 can be inserted into the first restricting groove 3151 and the second restricting groove 3171, so that the liquid cooling assembly 35 is connected between the first supporting structure 311 and the second supporting structure 331. The liquid cooling assembly 35 is connected with the first bracket 31 and the second bracket 33 in an inserting mode, so that the assembly and the disassembly of the liquid cooling assembly 35, the first bracket 31 and the second bracket 33 are convenient.

It is to be understood that the connection between the liquid cooling assembly 35 and the first bracket 31 through the first groove 3513 is not limited in the present application, and the liquid cooling assembly 35 may be directly fixed on the first bracket 31. The connection between the liquid cooling assembly 35 and the second bracket 33 through the second groove 355 is not limited in the present application, and the liquid cooling assembly 35 may be directly fixed on the second bracket 33.

It is understood that the shape and structure of the first bracket 31 in the fixed frame 30 are not limited in the present application, the shape and structure of the second bracket 33 in the fixed frame 30 are not limited in the present application, the first bracket 31 may not be a square frame structure, and the second bracket 33 may not be a square frame structure. The first support 31 and the second support 33 may not be connected by the liquid cooling assembly 35, and the first support 31 and the second support 33 may be supported and connected by other connection structures, for example, the first support 31 and the second support 33 may be detachably connected or non-detachably connected together by a connecting rod. The liquid cooling assembly 35 may be disposed on the first support 31 and/or the second support 33, for example, the liquid cooling assembly 35 is fixedly disposed on the first support structure 311.

The foregoing is a partial embodiment of the present application and it should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications are also considered as the protection scope of the present application.

Claims (16)

1. The battery module is characterized by comprising at least one battery monomer group, a fixed frame and a liquid cooling assembly, wherein each battery monomer group comprises a plurality of battery monomers, the fixed frame comprises a first bracket and a second bracket, and the first bracket and the second bracket are oppositely arranged;

the first bracket comprises a first supporting structure and a first limiting structure, and the first limiting structure is convexly arranged on one side of the first supporting structure, which faces the second bracket;

the second support comprises a second supporting structure and a second limiting structure, the second limiting structure is convexly arranged on one side, facing the first support, of the second supporting structure, the first supporting structure, the second supporting structure, the first limiting structure and the second limiting structure enclose an installation space, at least one battery monomer group is installed in the installation space, the first limiting structure abuts against the outer side faces of the battery monomers, and the second limiting structure abuts against the outer side faces of the battery monomers;

and the liquid cooling assembly is fixed on at least one of the first supporting structure and the second supporting structure.

2. The battery module of claim 1, wherein the first support structure comprises a first support portion and a second support portion fixedly connected, the first support portion extending in a first direction, the second support portion extending in a second direction different from the first direction,

at least part of the first limiting structure is arranged on one side of the first supporting portion, which faces the second bracket, and extends along the first supporting portion.

3. The battery module according to claim 2, wherein the first limiting structure comprises a first limiting portion and a second limiting portion, the first limiting portion is disposed on one side of the first supporting portion facing the second supporting portion and extends along the first supporting portion, the second limiting portion is disposed on an end portion of the second supporting portion, where the end portion meets the first supporting portion, and the second limiting portion is fixedly connected with the first limiting portion.

4. The battery module according to claim 3, wherein the inner wall of the first limiting portion facing the inside of the fixed frame and the inner wall of the first supporting portion facing the second bracket form a first angle, and the range of the first angle is [92 °,98 ° ].

5. The battery module of claim 3, wherein the first support structure further comprises a first reinforcement portion connected between the first support portion and the second support portion.

6. The battery module according to claim 2, wherein the second support structure includes a third support portion and a fourth support portion fixedly connected, the third support portion extending in the first direction, the fourth support portion extending in the second direction, the third support portion being disposed opposite the first support portion, the second support portion being disposed opposite the fourth support portion;

at least part of the second limiting structure is arranged on one side of the third supporting portion, which faces the first bracket, and extends along the third supporting portion.

7. The battery module according to claim 6, wherein the second limiting structure comprises a third limiting portion and a fourth limiting portion, the third limiting portion is disposed on one side of the third supporting portion facing the first bracket and extends along the third supporting portion, the fourth limiting portion is disposed on an end portion of the fourth supporting portion, where the end portion meets the third supporting portion, and the fourth limiting portion is fixedly connected with the third limiting portion.

8. The battery module according to claim 7, wherein an inner wall of the third limiting portion facing the inside of the fixed frame and an inner wall of the third supporting portion facing the first bracket form a second angle ranging from [92 °,98 ° ].

9. The battery module according to claim 1, wherein the battery module comprises,

the liquid cooling assembly is connected between the first supporting structure and the second supporting structure, the liquid cooling assembly divides the installation space into a first space and a second space, and the first space and the second space are internally provided with battery monomer groups.

10. The battery module of claim 9, wherein the first bracket of the fixing frame further comprises a first limiting protrusion and a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are both protruding on one side of the first supporting structure, which faces the second bracket, the first limiting protrusion and the second limiting protrusion are arranged at intervals, a first limiting groove is formed in the first limiting protrusion, a second limiting groove is formed in the second limiting protrusion, and the liquid cooling assembly is inserted into the first limiting groove and the second limiting groove.

11. The battery module according to claim 10, wherein the first bracket and the second bracket of the fixing frame are disposed opposite to each other in a third direction, the first limiting groove penetrates through the first limiting protrusion in a first direction different from the third direction, and an end portion of the liquid cooling assembly away from the first limiting protrusion abuts against an inner wall of the second limiting groove.

12. The battery module of claim 11, wherein the liquid cooling assembly is provided with a first groove, a first limit protruding strip is arranged on the inner wall of the first limit groove, and the first limit protruding strip penetrates through the first groove and abuts against the liquid cooling assembly.

13. The battery module of claim 9, wherein the liquid cooling assembly comprises a liquid cooling plate and a heat conducting pad, and the heat conducting pad is arranged on one side of the liquid cooling plate facing the first space and/or one side of the liquid cooling plate facing the second space.

14. The battery module of any one of claims 1-13, wherein each cell stack further comprises two end plates, a plurality of the cells are positioned between the two end plates, the first bracket and the second bracket are each provided with a mounting hole for penetrating a fixing member for fixing the end plates and the fixing frame together.

15. An energy storage device comprising a battery module according to any one of claims 1-14.

16. A powered device comprising the energy storage device of claim 15.