CN218334211U

CN218334211U - Battery module, battery pack and electric device

Info

Publication number: CN218334211U
Application number: CN202222397007.4U
Authority: CN
Inventors: 许炳; 许俊海
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-01-17
Anticipated expiration: 2032-09-07

Abstract

The embodiment of the application provides a battery module, a battery pack and an electric device. The battery module comprises a plurality of battery cores and a current collecting piece which are stacked. The battery cell comprises a first surface, and a pole is arranged on the first surface. The current converging piece is provided with a mounting groove, and the current converging piece is connected with the battery cell in an electric connection mode of the pole in a sliding mode through the mounting groove. The battery module that this application provided, the mode of connecting through slipping insert has realized being connected of electric core and piece that converges, has avoided welding slag to splash and the safety risk that remains and bring in current welding process, has improved the security of battery module.

Description

Battery module, battery pack and electric device

Technical Field

The application relates to the field of power batteries, in particular to a battery module, a battery pack and an electric device.

Background

Under the environment of energy conservation and emission reduction, the battery technology is rapidly developed due to the energy-saving characteristic, and is widely applied to various carriers.

In this kind of current battery structural design, adopt modes such as laser welding to fix the electricity core in the battery module usually, this kind of method is firm reliable, but the produced welding slag of welding can fall into inside the battery module, can have the risk of high-voltage breakdown when the battery uses.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide battery module, battery package and power consumption device, realizes improving the technological effect of battery module security.

In a first aspect, an embodiment of the present application provides a battery module, including a plurality of electric cores and the piece that converges that piles up the setting, electric core includes the first surface, be equipped with utmost point post on the first surface, the piece that converges has seted up the mounting groove, the piece that converges passes through mounting groove sliding connection the mode electricity of utmost point post is connected adjacently electric core.

According to the technical scheme, the battery core is connected with the confluence piece in a sliding connection mode, the risk of high-voltage breakdown caused by welding slag generated in the welding process is avoided, the safety of the battery module is improved, and meanwhile, the structure which is simplified is also optimized in the installation process, the installation difficulty is reduced, and the installation efficiency is improved.

In some embodiments, the pole has a positioning groove, the mounting groove has a positioning protrusion, and the positioning protrusion is received in the positioning groove.

In some embodiments, an inclined transition surface is disposed on the pole, and the transition surface connects the positioning groove and the first surface.

In some embodiments, one end of the pole, which faces away from the first surface, is provided with a positioning portion, and one side of the positioning portion, which faces the current collecting piece, is a partial ellipsoid.

In some embodiments, a manifold plate is further included, the manifold plate connecting the bus bars.

In some embodiments, the liquid cooling plate is connected to the integrated plate, and the liquid cooling plate and the bus bar are respectively disposed on two sides of the integrated plate.

In some embodiments, the battery further comprises a temperature-equalizing plate, the temperature-equalizing plate is arranged between adjacent battery cells, the temperature-equalizing plate is provided with supporting legs, and the supporting legs are connected with the liquid-cooling plate.

In some embodiments, the heat conducting portion is disposed on the flow converging member, the heat conducting portion protrudes toward the integrated board, and a recessed portion is disposed on the integrated board and accommodates the heat conducting portion.

In a second aspect, a battery pack is provided, which comprises a box body and a battery module of the first aspect.

In a third aspect, an electric device is provided, which includes the battery pack of the second aspect.

Drawings

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 of the present application 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 that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

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

fig. 2 is a schematic structural diagram of a battery cell in the battery module shown in fig. 1;

fig. 3 is a schematic diagram illustrating connection between a battery cell and a bus bar in the battery module shown in fig. 1;

fig. 4 is a schematic bottom structure view of the integration plate in the battery module shown in fig. 1;

fig. 5 is a schematic view illustrating an internal structure of the battery module shown in fig. 1.

Icon: 100-a battery module; 10-electric core; 11-pole column; 111-a positioning section; 112-positioning grooves; 113-a transition surface; 20-an integrated board; 21-a manifold; 211-a mounting groove; 212-positioning projections; 213-a heat conducting portion; 23-an FPC assembly; 24-a recess; 30-an insulating stopper; 40-liquid cooling plate; 41-water channel; 50-temperature-equalizing plate; 51-supporting the foot.

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 described clearly 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.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the foregoing drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "attached" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

In this application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in this application. The battery cell can be flat, rectangular or other shapes, and the embodiment of the application does not limit the battery cell.

The battery module that embodiment of this application mentioned includes a plurality of electric cores and busbar, and the busbar is used for realizing the electric connection between a plurality of electric cores, for example parallelly connected, series connection or series-parallel connection.

The battery pack is a packaging structure integrating one or more battery modules, and the structure is favorable for management, charge and discharge control and installation of the battery modules.

In current battery module design, adopt laser welding's mode fixed battery module usually, inevitable can produce the welding slag in this process, and this may change the connection relation between the electric core or the nature in space between the electric core for have the possibility of puncturing under high pressure state, thereby initiate thermal runaway.

Still can adopt harmonica pipe liquid cold drawing to carry out radiating design through the heat conduction pad to electric core among the battery module among the prior art. The design has simple structure, mature technology and economical efficiency, but also has some defects: only one side of the liquid cooling plate is in contact with the heat conducting pad, so that the heat dissipation efficiency is limited; the bottom of the battery cell (the end far away from the pole) is close to the liquid cooling plate, and the end of the pole generates heat more, so that the heat of the battery cell is not uniformly distributed, the temperature difference is too large, and the dynamic property and the service life are further influenced; and harmonica pipe liquid cooling board adopts extrusion usually, causes to be difficult to guarantee the plane degree when length is longer to lead to the radiating surface contact failure, reduce the radiating efficiency.

The above defects may adversely affect the safety, usability, service life, etc. of the battery module to various degrees. In view of this, the application provides a technical scheme, and through the mode of inversion and sliding connection, the safety performance of the battery module is improved, and meanwhile, the arrangement of each part in the battery module is optimized, and the space utilization rate and the energy density are improved, and the heat radiation performance is improved.

The technical scheme described in the embodiment of the application can be used in various application scenarios using the battery, such as electric vehicles, electric ships, spacecrafts and the like.

Referring to fig. 1 to 4, a battery module 100 provided in an embodiment of the present application includes a plurality of stacked battery cells 10 and a bus bar 21, where the battery cell 10 includes a first surface, the first surface is a top surface of the battery cell as shown in fig. 2, a terminal 11 is disposed on the first surface, the bus bar 21 is provided with a mounting groove 211, and the bus bar 21 is electrically connected to adjacent battery cells 10 by the mounting groove 211 in a sliding manner to connect the terminal 11.

In this embodiment, the installation direction is a direction pointed by a direction a in fig. 1, and the plurality of battery cells 10 are sequentially inserted into the installation groove 211 in a sliding manner from the direction a. Consequently battery module 100 is still including insulating stopper 30, but insulating stopper 30 slip cartridge goes into mounting groove 211, and after every installed an electric core 10, through filling in insulating stopper 30 in order to fix electric core 10, insulating stopper 30 can also avoid not needing to take place the mistake between the utmost point post 11 of electricity connection to contact simultaneously, reduce the risk that the appearance is unusual.

In one embodiment, the terminal 11 has a positioning groove 112, and the mounting groove 211 has a positioning protrusion 212, and the positioning protrusion 212 is received in the positioning groove 112.

In this embodiment, the bus bar 21 is made of copper to satisfy the requirements of low weight and good electrical conductivity. Further, because the sliding plug connection has high strength and high frequency friction contact, the contact surface of the bus bar piece 21 close to the pole 11 can adopt nickel plating and other modes to improve the wear resistance, so that the phenomenon that the mounting groove 211 is deformed and the pole 11 cannot be fixed due to frequent sliding plug is avoided, and the electrical requirement of being electrically connected with the pole 11 can be met.

This application embodiment through set up mounting groove 211 on converging piece 21 with electric core 10 on utmost point post 11 sliding connection, realize electric core 10's plug-in type installation and fixed, avoided the risk that the welding slag that produces brought among the welded connection, improved battery module 100's security and packaging efficiency.

Referring to fig. 2, the positioning groove 112 formed on the post 11 is recessed inward, the mounting groove 211 is provided with a positioning protrusion 212, and the positioning protrusion 212 corresponds to the positioning groove 112 in shape and can abut against the positioning groove 112, so as to limit the post 11 in the mounting groove 211 in the vertical direction. The shape of the inward recess of the positioning groove 112 is an arc surface, and the positioning groove 112 with an arc structure can reduce the contact area with the positioning protrusion 212, so that the pole 11 can be conveniently detached and installed in the bus bar 21 in a sliding manner.

In one embodiment, the terminal post 11 is provided with an inclined transition surface, and the transition surface connects the positioning groove 112 and the first surface. In this embodiment, the transition surface 113 from the positioning groove 112 to the first surface is an inclined plane, and the arrangement of the inclined plane is also to facilitate the sliding insertion of the mounting post 11, so as to reduce the difficulty of the dismounting.

The constant head tank 112 of cambered surface and the 113 shapes of transition face on inclined plane make jointly to have the clearance between utmost point post 11 and the mounting groove 211, avoid appearing the circumstances such as jam in the installation, are favorable to improving the installation effectiveness.

In an embodiment, one end of the pole 11 away from the first surface is provided with a positioning portion 111, and one side of the positioning portion 111 facing the bus bar 21 is a partial ellipsoid.

The positioning part 111 can be embedded into the space between the positioning protrusion 212 and the vertical wall surface of the mounting groove 211, so that the limitation of four degrees of freedom of the pole 11 in the front, back, up and down directions perpendicular to the direction a is realized, the battery cell 10 is further fixed, and the battery cell 10 is prevented from being separated from the mounting groove 211 in the vertical direction. The positioning part 111 is shaped like a partial sphere or an ellipsoid, and one side facing the bus bar 21 is a cambered surface, and the radian of the contact part of the positioning part 111 and the bus bar 21 is low. Compare in straight face, the cambered surface makes the area of contact little with piece 21 that converges, is favorable to the dismouting of electric core 10, and the low radian cambered surface has still ensured utmost point post 11's electrical connection requirement simultaneously, avoids the contact surface undersize and unusual situation such as contact failure to appear.

In one embodiment, the battery module 100 further includes a board 20, and the board 20 is connected to the bus bar 21. In this embodiment, the integrated board 20 is further provided with a wiring harness isolation board, an FPC assembly 23 (Flexible Printed Circuit) and a fireproof and heat-insulating structure on the top of the electrical core 10. Referring to fig. 5, in the present embodiment, the FPC assembly 23 is disposed at the middle section of the integrated board 20 and between the two terminals 11 of each battery cell 10, so as to facilitate connection of each bus bar 21. The integrated board 20 can be manufactured by an integrated molding process, such as injection molding, which improves the strength of the integrated board 20 and simplifies the installation process. In the embodiment, compared with the prior art, the battery cell 10 is inverted, so that the arrangement positions of some device components are correspondingly changed, and the device components are adaptively assembled on the integrated board 20, so that the structure can be simplified, the process can be optimized, and meanwhile, the safety and the installation efficiency can be improved.

In this embodiment, a plurality of bus bars 21 are arranged in the integrated board 20, each bus bar 21 is electrically connected to the terminals of adjacent electric cores 10, and all the electric cores 10 are sequentially connected in series, in parallel, or in series-parallel, so as to improve the total output voltage and capacity of the battery module.

In one embodiment, the battery module 100 further includes a liquid cooling plate 40, the liquid cooling plate 40 is connected to the integrated plate 20, and the liquid cooling plate 40 and the bus bar 21 are respectively disposed on two sides of the integrated plate 20. The liquid cooling plate 40 is connected to a side of the integration plate 20 away from the battery cell 10, and is used for cooling the battery cell 10. It should be noted that, referring to fig. 1, compared to the prior art, in the present technical solution, because the battery cell 10 is inverted, the terminal 11 is closer to the liquid cooling plate 40, and because the heat generated at the terminal 11 is more, the structure of the battery module 100 of this embodiment has a better heat dissipation effect, and the temperature difference on the battery cell 10 is effectively reduced.

The liquid cooling plate 40 can adopt the schemes such as the punching press board or double-deck liquid cooling board of aluminium alloy extrusion, the parallelly connected water route of double-circuit, and this application does not make the restriction to the concrete model selection of liquid cooling plate 40.

In this embodiment, a water channel 41 is formed in the liquid cooling plate 40, the water channel 41 includes an inlet and an outlet which are oppositely arranged, and a flow adjusting device (not shown) is disposed at the inlet and/or the outlet.

The water channel 41 is connected to the electric device, for example, when the present embodiment is applied to a carrier, the water channel 41 is connected to a water cooling loop on the carrier, so as to realize a complete cooling working medium circulation. In practical applications, various parameters of the liquid cooling plate 40 may be set according to an actual usage scenario and by combining with a result of the heat dissipation simulation, where the parameters of the liquid cooling plate 40 include, but are not limited to, a shape, an orientation, a depth, a width, a length, and the like of a water channel 41 in the liquid cooling plate 40.

The water quantity adjusting device is disposed at the inlet and/or outlet of the water channel 41, and is used for adjusting the opening degree of the water inlet channel 41 and the water outlet channel 41 so as to adjust the flow rate of the water inlet channel 41 and the water outlet channel 41. In this embodiment, the flow rate adjusting device may select different thermal management strategies according to the working conditions of the applied vehicle, so as to control the temperature of the entire battery pack within an appropriate range, thereby ensuring the safety of the battery. The judgment of different working conditions such as acceleration of a vehicle and high-power quick charging can be comprehensively determined according to the analysis of parameters such as the instant temperature, the output power, the input instruction and the like of the battery.

In this embodiment, the flow rate adjusting device can switch the liquid cooling plate 40 between at least two heat management strategies, namely, a normal heat dissipation mode and an enhanced heat dissipation mode, so as to meet different working condition requirements. The difference between the normal heat dissipation mode and the enhanced heat dissipation mode is that the flow rate of the heat dissipation working medium flowing through the water channel 41 is different, and the enhanced heat dissipation mode has a larger flow rate and a stronger heat dissipation effect.

In an embodiment, the battery module 100 further includes a temperature-equalizing plate 50, the temperature-equalizing plate 50 is disposed between the adjacent battery cells 10, the temperature-equalizing plate 50 is provided with supporting legs 51, and the supporting legs 51 are connected to the liquid-cooling plate 40.

Further, what this embodiment adopted is that elasticity VC samming board (vacuum Chamber samming board), and the vacuum Chamber in the VC samming board holds liquid, and liquid can evaporate and spread to whole inner Chamber when absorbing the heat to conduct the heat to the cold junction, steam recondensation backward flow afterwards realizes the heat dissipation circulation of working medium. Such a vapor chamber 50 has a higher heat dissipation efficiency.

In this embodiment, the temperature equalization plate 50 is adhered to the larger surface of the electrical core 10 (i.e., the side surface of the electrical core in the embodiment) by the heat-conducting double-sided adhesive tape to ensure sufficient contact, so as to play a role in fixing while playing a role in heat conduction, compared with the defects of difficult operation, uneven coating and the like in the prior art of coating the heat-conducting paste, the heat-conducting double-sided adhesive tape is cleaner and faster to use, has the shockproof and buffering effects, and further improves the installation efficiency and the use safety. In the embodiment, the thermal conductivity of the thermal double-sided adhesive tape is not lower than 3W/(m × K).

The main contact surface of the temperature equalizing plate 50 is bonded to the side surface of the battery cell 10, and the two ends of the temperature equalizing plate are respectively provided with a supporting leg 51, the supporting legs 51 bypass the integration plate 20 and cross-over the two sides of the integration plate 20 to the liquid cooling plate 40, so that the supporting leg also plays a role in heat conduction while playing a role in supporting, and heat dissipation of the side surface with a large area of the battery cell 10 through the VC temperature equalizing plate 50 is realized. Compared with the prior art, the multi-directional heat dissipation is performed from the pole 11 side and the larger surface of the battery cell 10, so that a heat dissipation loop of an internal circulation is added, and the heat dissipation effect and the safety of the battery module are improved. The heat dissipation path of the battery cell 10 through the side surface is: the battery comprises a battery cell 10, a heat-conducting double-faced adhesive tape, a temperature-uniforming plate 50 and a liquid cooling plate 40.

The arrangement of the temperature equalizing plate 50 simultaneously satisfies the requirements of supporting, heat dissipation, fire prevention and heat insulation between adjacent electric cores 10 and space extrusion during aging and expansion of the buffer electric cores 10, optimizes the components such as fire prevention and heat insulation cotton and expansion cushion pads in the prior art, simplifies the components, improves the integration level, reduces the space occupation and improves the installation efficiency. Meanwhile, the adoption of the VC temperature-uniforming plate 50 further simplifies the structure, avoids the complex design that a cooling plate needs to be connected with a cooling working medium in the prior art, simplifies the structure of the battery module 100 and improves the use safety.

In one embodiment, the heat conducting portion 213 is disposed on the flow-converging member 21, the heat conducting portion 213 protrudes toward the integrated board 20, a concave portion 24 corresponding to the shape of the heat conducting portion 213 is disposed on the side of the integrated board 20 facing the heat conducting portion 213, and the concave portion 24 can accommodate the heat conducting portion 213. The heat conducting portion 213 is a cylinder in the present embodiment, and other shapes may be adopted in other embodiments, which is not limited in this application. The heat conducting part 213 that the protrusion set up is further close to the liquid cooling board 40, can more high-efficiently derive the heat of electric core 10 utmost point post 11 one side, improves the radiating effect. The protruding heat conduction portion 213 also enhances the fixed connection between the bus bar 21 and the liquid cooling plate 40. In this embodiment, the heat conducting portion 213 may penetrate through the recess 24 and penetrate through the integrated board 20 to directly contact with the liquid cooling plate 40, thereby improving the heat dissipation effect.

In this embodiment, the battery module 100 further includes an insulating thermal pad (not shown) disposed between the bus bar 21 and the liquid cooling plate 40. Further, at the heat conduction portion 213 on the bus bar 21, the surface of the heat conduction portion 213 is provided with an insulating film to ensure electrical safety. The insulating film may be provided with a knurled edge to further enhance the connection strength between the heat conducting portion 213 and the liquid cooling plate 40. The material of the insulating film in this embodiment can be selected from polyurethane mixture, polyimide film, etc., and its performance parameters are as follows: the insulation strength is not lower than 5.5Kv/mil, the tensile strength is not lower than 140MPa, and the heat conductivity is not lower than 3W/(m × K). The specific thickness, depth and other parameters of the insulating film can be designed and selected according to the actual assembly effect and the simulation result.

In this embodiment, the heat conduction path of the battery cell 10 through the terminal 11 is as follows: the battery cell 10, the pole 11, the confluence piece 21 (insulating film), the insulating heat conducting pad and the liquid cooling plate 40. The embodiment is provided with two heat dissipation ways, so that the temperature difference of different areas of the battery cell 10 is reduced while the heat dissipation effect is effectively improved, and the service performance and the service life of the battery cell 10 are effectively improved.

Furthermore, the flatness of the heat conducting part 213 on the confluence piece 21 and the concave part 24 of the liquid cooling plate 40 contacted with the heat conducting part is controlled within 0.15mm, so that the close contact between the heat conducting part and the concave part is ensured, and a gap is avoided between contact surfaces, thereby ensuring the heat dissipation effect. Because the insulating heat conducting pad is arranged between the confluence piece 21 and the liquid cooling plate 40, a limiting piece can be arranged on the liquid cooling plate 40 and used for limiting and fixing the deformation of the insulating heat conducting pad, and the liquid cooling plate 40, the insulating heat conducting pad and the confluence piece 21 can be tightly attached.

The parameters of the insulating and heat-conducting pad in the embodiment include: the density is not more than 2.5g/cm < 2 >, the flame retardant rating is V0, the thermal conductivity is not less than 3W/(m x K), the compression ratio is 30% +/-5%, and the ASTM D5470 standard is adopted. The specific shape, thickness and area of the insulating heat conducting pad can be set according to the actual assembly condition and the simulation result of the heat dissipation simulation.

The integrated board 20 includes a heat conductive part and a non-heat conductive part, which are divided according to whether heat is transferred. Wherein the non-heat-conducting part can directly contact the liquid cooling plate 40 due to the lower temperature; an insulating heat-conducting pad is disposed between the heat-conducting portion and the liquid cooling plate 40, thereby improving the safety of the battery module 100.

The battery cell 10 is usually provided with an explosion-proof valve, in this embodiment, the integrated board 20 is further provided with an exhaust duct (not shown) at a position corresponding to the explosion-proof valve in each battery cell 10, and the exhaust duct is used for discharging flue gas generated when the corresponding battery cell 10 is out of thermal control, so as to achieve the effect of reducing pressure and improve the safety performance of the battery module.

An embodiment of the present application further provides a battery pack, which includes a case and the battery module 100 described in the foregoing embodiments. The battery module 100 is disposed in the case, and the liquid cooling plate 40 in the battery module 100 may be regarded as a part of a bottom plate in the case to simplify the case structure.

An embodiment of the present application further provides an electric device, which includes the battery pack described in the foregoing embodiment. In the present embodiment, the electric device is taken as a carrier for illustration, and the selection of the electric device is not meant to be limited.

The technical scheme of this application, through the mode of sliding connection utmost point post 11 with piece 21 that converges, replace current welded connection mode with sliding plug connection, avoided the welding slag to fall into in the battery module and the risk of the high voltage breakdown that brings, improved battery module 100's security.

Battery module 100 still carries out comprehensive and efficient heat dissipation to electric core 10 through two heat dissipation routes simultaneously, has effectively reduced the temperature and the difference in temperature of electric core 10. In the embodiment, the temperature difference of the battery pack is reduced from 15 ℃ to 5 ℃, the precision of temperature control is improved, and the service life of the battery is correspondingly prolonged by 10%. Meanwhile, the two heat dissipation ways can implement different thermal management control strategies in a mode of adjusting the liquid cooling plate 40 more easily, so that the use safety of the battery cell 10 is ensured. On the other hand, the structure of the present application, such as the integrated board 20, makes the battery module 100 have a higher integration level, effectively simplifies the installation process, and also improves the assembly efficiency.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s).

In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. A battery module, comprising:

the battery comprises a plurality of battery cells which are stacked, wherein each battery cell comprises a first surface, and a pole is arranged on each first surface;

the current converging piece is provided with a mounting groove, and the current converging piece is connected with the electric core in an electric connection mode of the pole through the mounting groove in a sliding manner.

2. The battery module as set forth in claim 1, wherein the terminal post has a positioning groove, and a positioning protrusion is disposed in the mounting groove and received in the positioning groove.

3. The battery module according to claim 2, wherein an inclined transition surface is arranged on the post, and the transition surface is connected with the positioning groove and the first surface.

4. The battery module according to claim 1, wherein a positioning portion is disposed at an end of the terminal away from the first surface, and a side of the positioning portion facing the bus bar is a partial ellipsoid.

5. The battery module according to claim 1, further comprising a manifold plate connecting the bus bars.

6. The battery module according to claim 5, further comprising a liquid cooling plate, wherein the liquid cooling plate is connected to the integrated plate, and the liquid cooling plate and the bus bar are respectively disposed on two sides of the integrated plate.

7. The battery module according to claim 6, further comprising a temperature-equalizing plate, wherein the temperature-equalizing plate is arranged between adjacent cells, and the temperature-equalizing plate is provided with supporting legs, and the supporting legs are connected with the liquid cooling plate.

8. The battery module according to claim 5, wherein the bus bar has a heat conducting portion protruding toward the integrated board, and the integrated board has a recess receiving the heat conducting portion.

9. A battery pack comprising a case, characterized by further comprising the battery module according to any one of claims 1 to 8.

10. An electric device comprising the battery pack according to claim 9.