CN111092179A

CN111092179A - Battery module and power supply device

Info

Publication number: CN111092179A
Application number: CN201911360820.0A
Authority: CN
Inventors: 王兴亮; 刘华栋; 周鹏
Original assignee: Sinoev Hefei Technologies Co Ltd
Current assignee: Sinoev Hefei Technologies Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-05-01

Abstract

The embodiment of the application provides a battery module and power supply unit, this battery module includes the mounting panel and sets up a plurality of battery cells on the mounting panel, and this a plurality of battery cells are parallel arrangement side by side. A shell is arranged at the edge of the mounting plate and can enclose the single batteries. And pouring sealant is filled among the plurality of single batteries and between the single batteries and the shell. So, can utilize the pouring sealant to block the heat that the monomer battery that takes place thermal instability produced and explode and spout the material when there is monomer battery to take place thermal instability to avoid influencing adjacent other monomer batteries, and then influence the safety of whole battery module.

Description

Battery module and power supply device

Technical Field

The application relates to the technical field of power batteries, in particular to a battery module and a power supply device.

Background

In recent years, as the problems of energy cost and environmental pollution are more and more prominent, the pure electric vehicles and hybrid electric vehicles receive attention from governments and various automobile enterprises due to the advantage that the pure electric vehicles and hybrid electric vehicles can greatly eliminate even zero discharge of automobile exhaust. However, there are many technical problems to be solved in pure electric vehicles and hybrid electric vehicles, wherein the safety of the battery system is one of the important problems.

With the higher requirement of the whole vehicle on the cruising ability of the power battery, the energy density of the power battery is higher and higher nowadays. However, as the energy density of the battery is continuously increased, the safety risk of the battery, i.e., the risk of thermal runaway, is also increased accordingly. At present, to the thermal runaway risk problem of battery, generally adopt like the heat dissipation of battery liquid cooling technique in order to improve the battery to reduce the thermal runaway risk, perhaps increase the clearance between the adjacent battery, in order to reach the control because of the module thermal runaway risk that battery self problem arouses. However, the above-mentioned methods are difficult to solve the problem that the safety of the entire battery module is affected when the thermal runaway of the single battery occurs.

Disclosure of Invention

An object of the present application includes, for example, providing a battery module and a power supply device that can avoid a problem that once thermal instability occurs in a unit cell, the safety of the entire battery module will be affected.

The embodiment of the application can be realized as follows:

in a first aspect, an embodiment provides a battery module, including:

mounting a plate;

the single batteries are arranged on the mounting plate and arranged in parallel side by side;

a housing disposed at an edge of the mounting plate and surrounding the plurality of unit batteries;

and the pouring sealant is filled among the plurality of single batteries and between the single batteries and the shell.

In an alternative embodiment, the battery module further includes:

the bending set up in the liquid cooling pipe between a plurality of battery cells, the liquid cooling has the coolant liquid in the pipe, is used for right a plurality of battery cells dispel the heat.

In an optional embodiment, the mounting plate is provided with a plurality of mounting holes, and each single battery is mounted in one of the mounting holes;

and structural adhesive is coated on the inner wall of each mounting hole so as to seal a gap between the side wall of each mounting hole and the corresponding single battery when the single battery is mounted in the mounting hole.

In an alternative embodiment, the liquid-cooled tube includes a tube body, and an input port and an output port provided at both ends of the tube body, the input port being used for introducing the cooling liquid into the tube body, and the output port being used for leading out the cooling liquid in the tube body;

the input port and the output port respectively extend out of the shell through an opening formed in the shell;

the position of the pipe body corresponding to the opening is sleeved with a sealing ring.

In an optional embodiment, a sealing groove is formed in a position, corresponding to the sealing ring, of the inner wall of the shell, and the sealing ring is partially accommodated in the sealing groove.

In an optional embodiment, a fixing assembly is further disposed between two adjacent rows of mounting holes of the mounting plate, and the fixing assembly is used for fixing the liquid cooling pipes disposed between the two adjacent rows of mounting holes.

In an optional embodiment, the fixing assembly includes a first fixing member and a second fixing member, and the first fixing member and the second fixing member are respectively located on two sides of the liquid cooling pipe and are arranged in a staggered manner.

In an alternative embodiment, a locking structure is provided on the housing for locking the two battery modules when the two battery modules are connected.

In an alternative embodiment, the locking structure includes a locking hole provided on the housing and having a radial direction corresponding to a radial direction of the unit battery, for locking and connecting the two battery modules in cooperation with the locking member.

In a second aspect, an embodiment provides a power supply device, which includes a plurality of battery modules as described in any one of the foregoing embodiments, and the plurality of battery modules are respectively connected in series in sequence.

The beneficial effects of the embodiment of the application include, for example:

the embodiment of the application provides a battery module and power supply unit, including mounting panel and a plurality of battery cell of setting on the mounting panel, this a plurality of battery cell parallel arrangement side by side. A shell is arranged at the edge of the mounting plate and can enclose the single batteries. And pouring sealant is filled among the plurality of single batteries and between the single batteries and the shell. So, can utilize the pouring sealant to block the heat that the monomer battery that takes place thermal instability produced and explode and spout the material when there is monomer battery to take place thermal instability to avoid influencing adjacent other monomer batteries, and then influence the safety of whole battery module.

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, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 2 is a structural diagram of a battery module after a single battery is mounted according to an embodiment of the present disclosure;

fig. 3 is a partial schematic view of a liquid cooling tube of a battery module according to an embodiment of the present disclosure;

fig. 4 is a partial schematic view of a housing of a battery module according to an embodiment of the present disclosure;

fig. 5 is another partial schematic view of a housing of a battery module according to an embodiment of the present disclosure;

fig. 6 is a partial schematic view of a mounting hole of a battery module according to an embodiment of the present disclosure;

fig. 7 is a partial schematic view illustrating a fixing member of a battery module according to an embodiment of the present disclosure;

fig. 8 is another partial schematic view of a fixing member of a battery module according to an embodiment of the present disclosure;

fig. 9 is an exploded view of a battery module according to an embodiment of the present application.

Icon: 10-mounting a plate; 11-a single cell; 12-mounting holes; 13-a fixed component; 131-a first fixture; 132-a second mount; 14-a locking structure; 20-a housing; 21-opening; 211-sealing the groove; 30-liquid cooling pipe; 31-a tube body; 32-input port; 33-output port; 40-a cover plate; 50-a first collector plate; 60-a second collector plate; 70-electrode tab.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. are used to indicate an orientation or positional relationship based on that shown in the drawings or that the application product is usually placed in use, the description is merely for convenience and simplicity, and it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present application.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.

Referring to fig. 1 and fig. 2, a structural diagram of a battery module according to an embodiment of the present disclosure is shown, where the battery module includes a mounting plate 10, a plurality of single batteries 11 are disposed on the mounting plate 10, and the plurality of single batteries 11 are disposed in parallel side by side. The single battery 11 may be a cylindrical ternary lithium power battery with a model number of 18650 or 21700, and of course, may also be a cylindrical battery with other model numbers. The plurality of unit cells 11 may be arranged in a plurality of rows and a plurality of columns on the mounting plate 10.

A casing 20 is further disposed at the edge of the mounting plate 10, and the casing 20 may surround the plurality of unit batteries 11, so as to stabilize the plurality of unit batteries 11. In this embodiment, the housing 20 and the mounting plate 10 may be made of low pressure cast aluminum alloy or may be made of composite material. The housing 20 and the mounting plate 10 may be integrally formed, or may be separately formed and welded together.

In the present embodiment, a potting adhesive (not shown) is filled between the plurality of single batteries 11 and between the single batteries 11 and the housing 20, that is, the potting adhesive is filled between every two adjacent single batteries 11 and between the single battery 11 adjacent to the housing 20 and the housing 20. In this embodiment, the filled pouring sealant may be an epoxy resin pouring sealant, an organic silicon resin pouring sealant, a polyurethane pouring sealant, or other types of pouring sealants, and is not limited in this embodiment.

Through the arrangement, once the single battery 11 generates a large amount of heat due to thermal instability or the thermal runaway generates the blowout object, the pouring sealant filled around the single battery 11 can prevent the heat and the blowout object from being transmitted to other adjacent single batteries 11, so that the influence on the adjacent single batteries 11 is avoided, and the problem of the whole battery module is further solved.

In this embodiment, in order to further alleviate the thermal runaway phenomenon of the single battery 11 caused by poor heat dissipation effect, the battery module further includes a liquid cooling pipe 30, and the liquid cooling pipe 30 is bent and disposed between the plurality of single batteries 11. The liquid cooling pipe 30 has a cooling liquid therein, and the heat dissipation management of the single battery 11 can be performed through the cooling liquid, so as to avoid the thermal instability phenomenon caused by the over-high temperature of the single battery 11 to a certain extent.

Wherein, the liquid cooling pipe 30 can be a flat liquid cooling pipe, and the flat liquid cooling pipe can be bent and arranged between the plurality of single batteries 11. The mode that this flat pipe bending of liquid cooling set up can be, wind round flat pipe of liquid cooling between every two adjacent rows of battery cells 11, perhaps also can be two rows of battery cells 11 at every other wind round flat pipe of liquid cooling, do not do the restriction in this embodiment specifically. In order to improve the heat dissipation effect as much as possible, a mode of winding a circle of liquid cooling flat pipe between every two adjacent rows of single batteries 11 can be adopted, so that each single battery 11 can be in contact with the liquid cooling flat pipe, and good heat dissipation is realized.

Referring to fig. 3, the liquid cooling pipe 30 includes a pipe body 31, and an input port 32 and an output port 33 disposed at two ends of the pipe body 31, wherein the input port 32 is used for introducing the cooling liquid into the pipe body 31, and the output port 33 is used for leading out the cooling liquid in the pipe body 31. The external vehicle liquid cooling system can receive the cooling liquid filled in the external vehicle liquid cooling system through the input port 32, and the cooling liquid can be discharged or recycled and transmitted to the external vehicle liquid cooling system through the output port 33.

In this embodiment, the tube body 31 may be made of a deformable material, such as a rubber material, so that when the tube body 31 is disposed between the plurality of unit batteries 11, the tube body can be well accommodated between the unit batteries 11 by deforming to some extent along with the shape of the gaps between the unit batteries 11.

Referring to fig. 4 and fig. 5, in the present embodiment, an opening 21 is formed on the housing 20, and the opening 21 may be formed on any one side of the housing 20, or when the housing 20 is an irregular quadrilateral frame, the opening 21 is formed at a joint of two adjacent sides of the housing 20, for example, as shown in fig. 3. The number of the openings 21 may be one or two, and the input port 32 and the output port 33 of the liquid-cooling pipe 30 respectively protrude to the outside of the housing 20 through the openings 21 provided in the housing 20. When the number of the openings 21 is one, both the input port 32 and the output port 33 can protrude out of the housing 20 through the openings 21. When the number of the openings 21 is two, the input port 32 and the output port 33 may respectively protrude from the housing 20 from one of the two openings 21.

In this embodiment, in order to enable the liquid cooling pipe 30 to dissipate heat from each of the plurality of unit cells 11, generally, a portion of the liquid cooling pipe 30 close to the input port 32 and a portion of the liquid cooling pipe 30 close to the output port 33 are in contact with an inner wall of the housing 20, that is, the liquid cooling pipe 30 can act on the outermost unit cell 11 of the plurality of unit cells 11.

Since the opening 21 is opened in the housing 20 so that the input port 32 and the output port 33 are extended, there may be a gap between the opening 21 and the pipe body 31 at a position corresponding to the opening 21. The entire module is filled with a potting adhesive, which may leak from a gap formed between the tube body 31 and the opening 21. Therefore, in the present embodiment, a seal ring is fitted over the pipe body 31 at a position corresponding to the opening 21 in the housing 20. The sealing ring can seal the gap between the tube body 31 and the opening 21 to prevent the pouring sealant from leaking.

The sealing ring can be a U-shaped sealing ring, so that when the liquid cooling pipe 30 is a liquid cooling flat pipe, the U-shaped sealing ring can be directly sleeved on the outer side of the liquid cooling flat pipe.

In this embodiment, in order to further improve the sealing effect of the sealing ring at the opening 21, a sealing groove 211 is formed on the inner wall of the housing 20 at a position corresponding to the sealing ring, and the sealing ring can be partially received in the sealing groove 211. Thus, the sealing effect of the sealing ring can be further improved by embedding the sealing ring into the sealing groove 211.

Optionally, in this embodiment, a matching groove may be formed in an outer side of the sealing ring, and two matching strips are located on two sides of the matching groove. The sealing groove 211 formed on the inner wall of the housing 20 may include a protrusion and a first groove and a second groove respectively located at two sides of the protrusion. Thus, when the sealing ring is accommodated in the sealing groove 211, the protrusion on the housing 20 may correspond to the matching groove on the sealing ring and be accommodated in the matching groove, and the two matching strips on the sealing ring may respectively correspond to the first groove and the second groove to be accommodated in the first groove and the second groove, respectively. Thus, good arrangement between the sealing ring and the sealing groove 211 is realized, and a good sealing effect is achieved.

Referring to fig. 6, in the present embodiment, a plurality of mounting holes 12 are formed in the mounting plate 10, wherein each single battery 11 is mounted in one of the mounting holes 12. Alternatively, one end of the single battery 11 is received in the mounting hole 12, and may be a positive end of the single battery 11 or a negative end of the single battery 11.

When the single battery 11 is installed in the installation hole 12, there may be a gap between the outer wall of the single battery 11 and the inner wall of the installation hole 12, so that the pouring sealant inside leaks from the installation hole 12. Therefore, in the embodiment, the inner wall of the mounting hole 12 is coated with the structural adhesive, wherein the structural adhesive is an adhesive which has high strength, can bear a large load, is aging-resistant, corrosion-resistant and stable in performance and is suitable for structural member adhesion. Gaps between the single batteries 11 and the inner walls of the mounting holes 12 are filled with the structural adhesive so as to prevent the pouring adhesive from leaking from the mounting holes 12.

The inner wall of the mounting hole 12 may be stepped, for example, may include a step, so that when the single battery 11 is mounted in the mounting hole 12, the step in the mounting hole 12 may support the single battery 11.

In addition, in the embodiment, in order to reduce the gap between the housing 20 and the outer single battery 11 as much as possible and save the space of the module, the inner wall of the housing 20 includes a plurality of arc-shaped grooves, and the shape of the arc-shaped grooves is matched with the shape of the outer wall of the single battery 11, so that the outer wall of the single battery 11 can be accommodated in the arc-shaped grooves. Through set up the arc recess at casing 20 inner wall, can save the holistic space that sets up of module, and make the cooperation between each subassembly in the module better.

Referring to fig. 7 and 8, in the present embodiment, in order to stably dispose the liquid cooling tubes 30 between the single batteries 11, a fixing assembly 13 is further disposed between two adjacent rows of the mounting holes 12 of the mounting plate 10, and the fixing assembly 13 may be used to fix the liquid cooling tubes 30 disposed between the two adjacent rows of the mounting holes 12. By the fixing action of the fixing component 13, the liquid cooling pipes 30 between the single batteries 11 can be stably arranged between the single batteries 11, and are not easy to fall off or shift. The fixing assembly 13 may be disposed between every two adjacent rows of the mounting holes 12, or the fixing assembly 13 may be disposed every two rows of the mounting holes 12, and is not limited in this embodiment.

Optionally, the fixing assembly 13 includes a first fixing member 131 and a second fixing member 132, wherein the first fixing member 131 and the second fixing member 132 are respectively located at two sides of the liquid cooling pipe 30 and are disposed in a staggered manner. So, can play the effect of joint to liquid cooling pipe 30 through setting up first mounting 131 and the second mounting 132 in liquid cooling pipe 30 both sides respectively, avoid liquid cooling pipe 30 to appear shifting, and through the mode of dislocation set, usable first mounting 131 and second mounting 132 play the fixed action to liquid cooling pipe 30.

In this embodiment, the fixing assembly 13 may include a plurality of sets, that is, a plurality of first fixing members 131 and a plurality of second fixing members 132, wherein the plurality of first fixing members 131 are arranged in a row and the plurality of second fixing members 132 are arranged in a row between two adjacent rows of the mounting holes 12. The plurality of first fixing members 131 are located at one side of the liquid-cooled pipe 30, and the plurality of second fixing members 132 are located at the other side of the liquid-cooled pipe 30.

Alternatively, the states of the first fixing member 131 and the second fixing member 132 may be a cylinder, a cone, a polygonal cylinder, etc., which are not particularly limited in this embodiment. The first fixing member 131 and the second fixing member 132 may be the same shape or different shapes, and the embodiment is not limited in particular.

The heights of the first fixing member 131 and the second fixing member 132 may be set as required, and generally, the heights are set to be small as long as the purpose of fixing the liquid cooling pipe 30 can be achieved. Thus, waste of materials can be avoided on the one hand, and influence on the arrangement of the single batteries 11 and the like can be avoided on the other hand after the height is too large.

In order to connect a plurality of battery modules stably, referring to fig. 1 again, in this embodiment, a locking structure 14 is disposed on a housing 20 of the battery module, and the locking structure 14 is used to lock two battery modules when the two battery modules are connected.

The locking structure 14 includes a locking hole disposed on the housing 20 and having a radial direction consistent with a radial direction of the single battery 11, and two battery modules can be connected in a locking manner through the locking hole in cooperation with the locking member. Alternatively, the locking member may be a bolt, and in practice, the locking member may be sequentially inserted through the locking holes of the housings 20 of the two battery modules, thereby locking the two battery modules together.

Alternatively, a plurality of locking structures 14 may be disposed on the housing 20, for example, when the housing 20 is a quadrangular frame, one locking structure 14 may be disposed on each of four side walls of the housing 20, so that when two battery modules are connected, a stable connection can be achieved.

Referring to fig. 9, based on the above structure, the battery module of the present embodiment further includes a cover plate 40, where the cover plate 40 is disposed on a side of the single battery 11 away from the mounting plate 10. The cap plate 40 may be coupled to the housing 20 around, thereby serving the purpose of fixing the inner unit cells 11.

In addition, the battery module further includes first and second current collecting

plates

50 and 60, the first and second current collecting

plates

50 and 60 being disposed at both sides of the plurality of unit cells 11, respectively. After the respective unit cells 11 are mounted in the mounting holes 12 formed in the mounting plate 10, both ends of the unit cells 11 are connected to the first current collecting plate 50 and the second current collecting plate 60, respectively.

The first current collecting plate 50, the second current collecting plate 60 and the cover plate 40 are provided with a plurality of through holes, and the through holes on the first current collecting plate 50, the second current collecting plate 60 and the cover plate 40 respectively correspond to the mounting holes 12 on the mounting plate 10. Electrode tabs 70 are arranged in the through holes of the first current collecting plate 50 and the second current collecting plate 60, and each electrode tab 70 can be connected with the positive electrode of the single battery 11, so that the single battery 11 and the current collecting plates can be connected.

In specific implementation, after the sealing rings sleeved on the single cell 11, the liquid cooling tube 30 and the liquid cooling tube 30 are disposed inside the housing 20, the potting adhesive is injected into the module after the structural adhesive on the inner wall of the mounting hole 12 is cured. The potting adhesive is filled between each unit cell 11, the liquid cooling tube 30 and the housing 20.

After the potting adhesive is filled, the cover plate 40 is fixed to the case 20 by bolts, and then the first current collecting plate 50, the second current collecting plate 60 and the electrode tabs 70 are welded together according to the polarity requirement of the single battery 11, thereby finally forming a complete module.

The battery module that this embodiment provided is through filling the casting glue between a plurality of battery cells 11 and between battery cell 11 and casing 20 to when avoiding having battery cell 11 to take place the thermal runaway phenomenon, produced a large amount of heats and explode and spout the material and cause the influence to adjacent battery cell 11, and then produce the influence to whole battery module.

Further, in order to achieve effective heat dissipation of the unit cells 11, a liquid cooling pipe 30 is provided between the plurality of unit cells 11, and heat dissipation management is performed on the unit cells 11 by the coolant in the liquid cooling pipe 30.

In addition, in order to avoid the leakage of the potting adhesive inside the module, sealing rings are sleeved at the positions of the liquid cooling tube 30 close to the input port 32 and the output port 33, so that the leakage of the potting adhesive caused by the gap between the liquid cooling tube 30 and the opening 21 on the housing 20 is avoided.

This embodiment uses through the cooperation of casting glue and liquid cold tube 30 in the battery module, and usable liquid cold tube 30 carries out the heat dissipation management to battery cell 11 to, utilize the inside casting glue of module, when avoiding having battery cell 11 thermal instability, cause the influence to other battery cells 11, and then threaten the safety of whole module. Furthermore, through the sealing structures such as the sealing ring and the structural adhesive, the problem that the pouring adhesive inside leaks outwards is solved.

On the basis of the above structure, another embodiment of the present application further provides a power supply device, where the power supply device includes a plurality of battery modules as described in the above embodiments, and the plurality of battery modules are respectively connected in series in sequence. A plurality of unit cells 11 are connected in parallel inside a single battery module, for example, a parallel battery pack may be formed by 39 unit cells 11 inside a single battery module. The power supply unit may include 5 such parallel battery packs of 39 cells 11 connected in series to form an integrated power supply unit.

It should be noted that the above specific values are only examples, and can be set according to the requirements of the user.

The power supply device provided in this embodiment includes the battery module in the above embodiment, and can achieve the same effect as the battery module, and specific descriptions of components in the power supply device can be found in the above embodiment, which is not described herein again.

To sum up, the battery module and the power supply unit that this application embodiment provided include mounting panel 10 and set up a plurality of battery cells 11 on mounting panel 10, and this a plurality of battery cells 11 parallel arrangement side by side. A case 20 is provided at an edge of the mounting plate 10, and the case 20 may enclose the plurality of unit cells 11 therein. Among them, the potting adhesive is filled between the plurality of unit batteries 11 and between the unit batteries 11 and the case 20. Therefore, when the single battery 11 is thermally unstable, the heat and the blasting substance generated by the single battery 11, which is thermally unstable, are blocked by the pouring sealant, so as to avoid affecting other adjacent single batteries 11 and further affecting the safety of the whole battery module.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery module, comprising:

mounting a plate;

2. The battery module according to claim 1, further comprising:

3. The battery module as claimed in claim 2, wherein the mounting plate has a plurality of mounting holes, and each of the single batteries is mounted in one of the mounting holes;

4. The battery module according to claim 2, wherein the liquid-cooled tube includes a tube body, and an input port and an output port provided at both ends of the tube body, the input port being configured to introduce the coolant into the tube body, the output port being configured to lead out the coolant in the tube body;

5. The battery module as set forth in claim 4, wherein a sealing groove is formed in the inner wall of the case at a position corresponding to the sealing ring, and the sealing ring is partially received in the sealing groove.

6. The battery module according to claim 3, wherein a fixing component is further disposed between two adjacent rows of the mounting holes of the mounting plate, and the fixing component is used for fixing the liquid cooling pipes disposed between the two adjacent rows of the mounting holes.

7. The battery module according to claim 6, wherein the fixing assembly comprises a first fixing member and a second fixing member, and the first fixing member and the second fixing member are respectively located on two sides of the liquid cooling pipe and are arranged in a staggered manner.

8. The battery module according to claim 1, wherein a locking structure is provided on the housing for locking two battery modules when the two battery modules are connected.

9. The battery module according to claim 8, wherein the locking structure comprises locking holes provided in the housing, the radial direction of the locking holes corresponding to the radial direction of the unit cells, for locking the two battery modules in connection with each other by engagement of locking members.

10. A power supply device comprising a plurality of battery modules according to any one of claims 1 to 9, wherein the plurality of battery modules are connected in series in this order.