Battery module, battery device and electric equipment

Abstract

The utility model discloses a battery module, a battery device and electric equipment. The battery module provided by the utility model comprises a plurality of battery monomers, an end plate, a cooling plate and a connecting piece, wherein the plurality of battery monomers are arranged along a first direction; the end plate is arranged at at least one end of the plurality of single batteries in the first direction; the cooling plate extends in the first direction and is connected with the battery monomers; the connecting piece is located between the end portion of the cooling plate in the first direction and the end plate and is connected with the end portion and the end plate. Through the implementation mode, the end part of the cooling plate is connected with the end plate through the connecting piece, so that the end plate fixes and supports the end part of the cooling plate, and the risk that the end part of the cooling plate is not fixed and thus the cooling plate is damaged is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery module, a battery device and a power consumption equipment. BACKGROUND

[0002] Energy saving and emission reduction is the key to sustainable development, which promotes the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle ability, high working voltage, environmental protection and low self-discharge.

[0003] During the use of the battery, the battery needs to be cooled by the cooling plate. However, the current cooling plate has insufficient support, and the risk of damage caused by shaking is relatively large. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a battery module, a battery device and a power consumption equipment, which aims to solve the above technical problems existing in the prior art.

[0005] To solve the above problems, the present application provides a battery module, which comprises a plurality of battery monomers, an end plate, a cooling plate and a connecting piece, the plurality of battery monomers are arranged along a first direction; the end plate is arranged at least one end of the plurality of battery monomers in the first direction; the cooling plate extends in the first direction, and the cooling plate is connected with the battery monomers; the connecting piece is located between the end of the cooling plate in the first direction and the end plate, and respectively connects the end and the end plate.

[0006] In some embodiments, the cooling plate comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are arranged at the end.

[0007] In some embodiments, the battery module further comprises an adhesive, which is arranged between the connecting piece and the end, and between the connecting piece and the end plate, and the connecting piece is connected with the end and the end plate through the adhesive.

[0008] In some embodiments, the number of end plates is two, and the two end plates are respectively arranged at both ends of the plurality of battery monomers in the first direction, and the battery module further comprises a support plate, which extends along the first direction and respectively connects the two end plates.

[0009] In some embodiments, the connecting piece is a hard foam.

[0010] In some embodiments, the plurality of battery monomers are arranged into a first column and a second column in the first direction, the first column and the second column are arranged in a second direction perpendicular to the first direction, and the cooling plate is partially arranged between the first column and the second column to be connected with the plurality of battery monomers in turn.

[0011] In some embodiments, the length of the cooling plate in the first direction is greater than the length of the first column or the second column in the first direction, such that the end portion is located on the side of the first column and the second column facing the end plate in the first direction.

[0012] To solve the above problems, the application further provides a battery device, which comprises a box body and the battery module.

[0013] In some embodiments, the battery device further comprises a battery management system, which is electrically connected with the battery module.

[0014] To solve the above problems, the application provides a power consumption device, which comprises the battery device.

[0015] Compared with the prior art, the battery module provided by the application comprises a plurality of battery monomers, an end plate, a cooling plate and a connecting piece, the plurality of battery monomers are arranged along a first direction; the end plate is arranged at at least one end of the plurality of battery monomers in the first direction; the cooling plate extends in the first direction, and the cooling plate is connected with the battery monomers; the connecting piece is located between the end portion of the cooling plate in the first direction and the end plate, and connects the end portion and the end plate respectively. Through the above-mentioned implementation, the end portion of the cooling plate is connected with the end plate through the connecting piece, so that the end plate fixes and supports the end portion of the cooling plate, and the risk of damage of the cooling plate caused by the lack of fixation of the end portion of the cooling plate is alleviated. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the application;

[0018] Figure 2 is an exploded schematic diagram of a battery device according to one or more embodiments of the application;

[0019] Figure 3 is a structural schematic diagram of a battery device according to one or more embodiments of the application;

[0020] Figure 4 is an exploded schematic diagram of a battery monomer of a battery module according to one or more embodiments of the application;

[0021] Figure 5 is a first perspective view of a battery module according to one or more embodiments of the application;

[0022] Figure 6 is a second perspective view of a battery module according to one or more embodiments of the present application;

[0023] Figure 7 is a partial enlarged view of a battery module according to one or more embodiments of the present application;

[0024] Figure 8 is a third perspective view of a battery module according to one or more embodiments of the present application.

[0025] Reference signs: vehicle 1; battery device 2; box 200; first part 210; second part 220; accommodating space 230; controller 3; motor 4; battery module 5; battery management system 6; battery cell 10; shell 11; housing 111; end cover 112; first column 12; second column 13; end plate 20; cooling plate 30; end 31; liquid inlet 32; liquid outlet 33; connecting piece 40; adhesive 50; support plate 60; first direction x1; second direction x2. DETAILED DESCRIPTION

[0026] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0027] Unless otherwise defined, 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and claims of the present application and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0029] Reference herein 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 present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0031] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of the battery, the demand of its market is also increasing.

[0035] Batteries referred to in the art can be classified as primary batteries and secondary batteries depending on whether they can be recharged. Primary batteries, also known as "disposable" batteries and primary cells, cannot be recharged and must be disposed of after their charge is depleted. Secondary batteries, also known as rechargeable batteries or secondary cells, are manufactured and processed differently from primary batteries and have the advantage of being able to be used multiple times after being recharged. Secondary batteries have a higher load current capacity than most primary batteries. Common types of secondary batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries have the advantages of being lightweight, having a large capacity (1.5 to 2 times the capacity of a nickel-metal hydride battery of the same weight), having no memory effect, and having a very low self-discharge rate. As a result, even though they are relatively expensive, they are widely used. Lithium-ion batteries are also widely used in electric vehicles and hybrid vehicles. Lithium-ion batteries used for such purposes have a relatively low capacity, but have a high output, a high charging current, and a long service life, although they are more expensive.

[0036] The batteries described in the embodiments of the present application refer to secondary batteries or primary batteries. In the following, the embodiments of the present application will be described mainly with reference to lithium-ion batteries. It should be understood that the embodiments of the present application are applicable to any other suitable type of secondary battery. The batteries referred to in the embodiments disclosed in the present application can be directly or indirectly applied to suitable devices to power the devices.

[0037] The present application provides a power consuming device, which can include but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. The electric toy can include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc. The power consuming device can include a battery device, and the power consuming device can provide power through the battery device to realize corresponding functions.

[0038] Taking an electric vehicle as an example, the electric vehicle can include a battery device.

[0039] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application.

[0040] The vehicle 1 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1 is internally provided with a battery device 2, which can be arranged at the bottom, the head, or the tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1, for example, the battery device 2 can be used as an operating power source of the vehicle 1. The vehicle 1 can further include a controller 3 and a motor 4, and the controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, to meet the power demand of the vehicle 1 during starting, navigation, and driving.

[0041] In some embodiments of the present application, the battery device 2 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0042] In order to improve the performance of the electric equipment, the present application further provides a battery device, which is described below with reference to Figures 2-3 , Figure 2 is an exploded view of a battery device according to one or more embodiments of the present application; Figure 3 is a structural view of a battery device according to one or more embodiments of the present application.

[0043] The shape of the battery device 2 can include but is not limited to a square cylinder or any other shape.

[0044] In some embodiments, the battery device 2 can include a box body 200 and a battery module 5, and the battery module 5 is accommodated in the box body 200. The box body 200 is used to provide a containing space 230 for the battery module 5, and the box body 200 can adopt various structures. In some embodiments, the box body 200 can include a first part 210 and a second part 220, and the first part 210 and the second part 220 are mutually covered to jointly define the containing space 230 for accommodating the battery monomer 10. The second part 220 can be a hollow structure with one end open, and the first part 210 can be a plate structure, which is covered on the open side of the second part 220 to jointly define the containing space 230 with the second part 220; or the first part 210 and the second part 220 can both be hollow structures with one side open, and the open side of the first part 210 is covered on the open side of the second part 220.

[0045] In the battery device 2, the battery modules 5 can be multiple, and the multiple battery modules 5 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery modules 5 are connected in series and in parallel. The multiple battery modules 5 can be directly connected in series, in parallel, or in a mixed manner, and the whole of the multiple battery modules 5 is accommodated in the box body 200. The battery device 2 can further include other structures, for example, the battery device 2 can further include a busbar component for realizing electrical connection between the multiple battery modules 5.

[0046] In some embodiments, the battery device 2 further includes a battery management system 6 electrically connected with the battery modules 5. The battery management system 6 (BMS) can have a great influence on the safe operation of the whole vehicle 1, the selection of the whole vehicle control strategy, the selection of the charging mode, and the operation cost. Whether during the operation of the vehicle 1 or during the charging process, the battery management system 6 needs to complete the real-time monitoring and fault diagnosis of the state of the battery system, and inform the whole vehicle controller 3 or the charger through the bus mode, so as to adopt a reasonable control strategy to achieve the purpose of effectively and efficiently using the battery system. In this embodiment, the battery management system 6 can be electrically connected with one battery module 5 or multiple battery modules 5 at the same time, so as to monitor the temperature, voltage, and module current of the multiple battery modules 5 through the battery management system 6, and perform battery balancing control and fault diagnosis, etc. Thus, the battery management system 6 can provide a control signal for the battery module 5, so as to manage the working state of the battery module 5 according to the detection information of the battery module 5.

[0047] In combination Figures 4-8 , Figure 4 is a schematic view of the disassembly of a battery cell of a battery module according to one or more embodiments of the present application; Figure 5 is a first perspective view of a battery module according to one or more embodiments of the present application; Figure 6 is a second perspective view of a battery module according to one or more embodiments of the present application; Figure 7 is a partial enlarged view of a battery module according to one or more embodiments of the present application; Figure 8 is a third perspective view of a battery module according to one or more embodiments of the present application.

[0048] To solve the above problems, the application provides a battery module 5, which comprises a plurality of battery monomers 10, an end plate 20, a cooling plate 30 and a connecting piece 40, the plurality of battery monomers 10 are arranged along a first direction x1; the end plate 20 is arranged at at least one end of the plurality of battery monomers 10 in the first direction x1; the cooling plate 30 extends in the first direction x1, and the cooling plate 30 is connected with the battery monomer 10; the connecting piece 40 is located between an end portion 31 of the cooling plate 30 in the first direction x1 and the end plate 20, and respectively connects the end portion 31 and the end plate 20.

[0049] The battery monomer 10 can refer to the smallest unit constituting the battery module 5, and in the battery module 5, the battery monomer 10 can be one or more, when the battery monomer 10 is multiple, the plurality of battery monomers 10 can be connected in series or in parallel or in mixed connection.

[0050] The battery monomer 10 can have any shape, for example, the shape of the battery monomer 10 can include but is not limited to a square, a cylindrical or any other shape.

[0051] The manufacturing method of the battery monomer 10 includes a laminated type and a winding type, that is, the battery monomer 10 is divided into two types of laminated battery and winding battery. The laminated battery has uniform current collection effect, small battery internal resistance and large specific power, but in order to improve the precision, the mold precision requirement is extremely high, the equipment investment is high, and the process is relatively complex, and the production efficiency is low. The winding battery is simple to manufacture, and the device precision requirement in the manufacturing and assembling process is general, the production efficiency is high, and the cost is relatively low. In terms of performance, the winding battery has excellent high and low temperature performance, very fast charging, super long life, stable high output voltage, solid structure and strong shock resistance.

[0052] The battery monomer 10 can include a shell 11, an electrode assembly and other functional components, and the shell 11 includes an end cover 112 and a shell body 111.

[0053] The end cover 112 refers to a component that covers the opening of the housing 111 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cover 112 can be adapted to the shape of the housing 111 to fit the housing 111. Optionally, the end cover 112 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 112 is less likely to deform when subjected to a pressing collision, allowing the battery cell 10 to have higher structural strength and improved safety performance. The end cover 112 can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly for outputting or inputting the electrical energy of the battery cell 10. In some embodiments, the electrode terminals can include poles. The poles can include positive poles and negative poles for outputting current and connecting with external circuits. In some embodiments, the end cover 112 can also be provided with a pressure relief device for releasing internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value. The material of the end cover 112 can also be various, such as the material of the end cover 112 including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can also be provided on the inner side of the end cover 112, which can be used to isolate the electrical connection components in the housing 111 from the end cover 112 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0054] The housing 111 is a component for fitting the end cover 112 to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The housing 111 and the end cover 112 can be independent components, and an opening can be provided on the housing 111, and the end cover 112 is covered on the opening to form the internal environment of the battery cell 10. Without limitation, the end cover 112 and the housing 111 can also be integrated, specifically, the end cover 112 and the housing 111 can form a common connecting surface before other components enter the housing, and when it is necessary to seal the inside of the housing 111, the end cover 112 is covered on the housing 111. The housing 111 can be various shapes and sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the housing 111 can be determined according to the specific shape and size of the electrode assembly. The material of the housing 111 can be various, such as the material of the housing 111 including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0055] The electrode assembly is a component in which electrochemical reactions occur in the battery cell 10. One or more electrode assemblies can be contained within the case 111. The electrode assembly is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and an insulator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet each have a portion with active material constituting a main body of the electrode assembly, and a portion without active material constituting a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0056] In some embodiments, the electrode assembly includes a positive electrode, a negative electrode, and an insulator. During charging and discharging of the battery cell 10, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The insulator is provided between the positive electrode and the negative electrode, and can prevent short circuiting of the positive and negative electrodes while allowing the active ions to pass through.

[0057] The end plate 20 is fixed opposite the plurality of battery cells 10, and can be used to define the arrangement boundary of the plurality of battery cells 10 in the first direction x1, and to provide support for the battery cells 10 at the end portions 31 of the plurality of battery cells 10. In some application scenarios, the end plate 20 can also be used to connect with the box body 200 to improve the installation stability of the battery module 5 in the accommodation space 230.

[0058] The cooling plate 30 can be used to cool the battery cells 10, and the material of the cooling plate 30 can be any material with good heat conduction performance, including but not limited to copper, aluminum, aluminum brazing composite material, or any other material. The cooling plate 30 can be formed with a cooling flow channel, which can be used to guide the flow of a cooling medium, thereby improving the cooling effect of the cooling plate 30. The cooling medium can be any medium with good heat conduction performance, including but not limited to water, brine, lye, mechanical oil, nitrate, polyvinyl alcohol, a three-nitrate aqueous solution, a water-soluble quenching agent, or any other medium. Cooling the battery cells 10 through the cooling plate 30 can reduce the risk of the battery cells 10 being in an abnormal working state due to overheating, and is conducive to improving the safety and service life of the battery module 5. The cooling plate 30 can extend along the first direction x1 and be connected with the plurality of battery cells 10 in sequence, thereby cooling the plurality of battery cells 10. It should be noted that the end portion 31 of the cooling plate 30 in the first direction x1 can refer to one end or both ends of the cooling plate 30 in the first direction x1. In some application scenarios, the number of end plates 20 is two, and the two end portions 31 of the cooling plate 30 in the first direction x1 are connected with the end plates 20 through the connecting pieces 40. It can be understood that the end portion 31 of the cooling plate 30 is connected with the end plate 20 through the connecting piece 40, so that the end portion 31 is fixed opposite the end plate 20, thereby improving the support stability of the end portion 31 of the cooling plate 30.

[0059] Through the above embodiments, the end portion 31 of the cooling plate 30 is connected with the end plate 20 through the connecting piece 40, so that the end plate 20 fixes and supports the end portion 31 of the cooling plate 30, and the risk of damage to the cooling plate 30 due to the lack of fixation of the end portion 31 of the cooling plate 30 is alleviated.

[0060] In some embodiments, the cooling plate 30 includes a liquid inlet 32 and a liquid outlet 33, which are arranged on the end portion 31. It can be understood that the cooling medium can enter the cooling plate 30 through the liquid inlet 32 and exit the cooling plate 30 through the liquid outlet 33, thereby forming a cooling loop, and then cooling the battery monomer 10. For example, the cooling plate 30 is formed with a cooling flow channel, which is in communication with the liquid inlet 32 and the liquid outlet 33, respectively. The cooling medium enters the cooling flow channel through the liquid inlet 32 and passes through each battery monomer 10 in turn under the guidance of the cooling flow channel, and finally exits the cooling flow channel through the liquid outlet 33. Therefore, the liquid inlet 32 and the liquid outlet 33 are arranged on the end portion 31, which facilitates the fixation of the liquid inlet 32 and the liquid outlet 33 through the end portion 31, and alleviates the risk of damage to the liquid inlet 32 and the liquid outlet 33 due to the lack of fixation when the cooling pipe is inserted and pulled out on the liquid inlet 32 and the liquid outlet 33. In some application scenarios, the cooling plate 30 has two end portions 31 arranged at intervals in the first direction x1. The liquid inlet 32 and the liquid outlet 33 can be located on one side end portion 31 of the cooling plate 30 at the same time, or one of them is located on one end portion 31 and the other is located on the other end portion 31.

[0061] In some embodiments, the battery module 5 further includes an adhesive 50 arranged between the connecting piece 40 and the end portion 31, and arranged between the connecting piece 40 and the end plate 20. The connecting piece 40 is connected with the end portion 31 and the end plate 20 through the adhesive 50, respectively. The adhesive 50 has adhesion, and the material of the adhesive 50 can include but is not limited to epoxy resin glue, polyurethane glue, etc. The adhesive 50 can also have good heat insulation and heat resistance performance, thereby facilitating the alleviation of the risk of heat escaping from the cooling plate 30 to the end plate 20. Therefore, the connecting piece 40 is bonded with the end portion 31 and the end plate 20 through the adhesive 50, which improves the connection stability of the connecting piece 40 with the end portion 31 and the end plate 20, and at the same time, the structure is simple and cost-saving.

[0062] In some embodiments, the number of end plates 20 is two, and the two end plates 20 are respectively arranged at two ends of the plurality of battery cells 10 in the first direction x1. The battery module 5 further comprises a support plate 60, which extends along the first direction x1 and is connected to the two end plates 20 respectively. It can be understood that the two end plates 20 are respectively arranged at two ends of the plurality of battery cells 10 in the first direction x1, so as to clamp the plurality of battery cells 10 between the two end plates 20 and define the arrangement boundary of the plurality of battery cells 10 in the first direction x1. The support plate 60 extends along the first direction x1 and is connected to the two end plates 20 respectively, so as to relatively fix the two end plates 20 and further define the mounting position of the plurality of battery cells 10 and provide support for the plurality of battery cells 10 in cooperation with the end plates 20. In some application scenarios, the support plate 60 can be arranged at the circumferential side of the plurality of battery cells 10 and surround a support space for supporting the battery cells 10, so as to further improve the mounting stability of the battery cells 10.

[0063] In some embodiments, the connecting member 40 is rigid foam. It should be noted that the rigid foam has good structural strength and compressibility, so as to cooperate with the end plate 20 to provide support for the end portion 31 of the cooling plate 30, and at the same time provide appropriate buffering between the end portion 31 and the end plate 20 when the battery module 5 is jolted, further improving the structural reliability of the cooling plate 30. In addition, the rigid foam has good heat insulation performance, greatly reducing the risk of heat escaping from the cooling plate 30 to the end plate 20. Thus, by arranging the connecting member 40 as rigid foam, the connection stability of the connecting member 40 with the end portion 31 and the end plate 20 is improved, while the structure is simple and cost-saving.

[0064] In some embodiments, the plurality of battery cells 10 are arranged into a first column 12 and a second column 13 in the first direction x1, and the first column 12 and the second column 13 are arranged in a second direction x2 perpendicular to the first direction x1, and the cooling plate 30 is partially clamped between the first column 12 and the second column 13 to be connected to the plurality of battery cells 10 in sequence. For example, the number of battery cells 10 can be six, and the six battery cells 10 can be divided into the first column 12 and the second column 13, the number of battery cells 10 in the first column 12 is three, and the number of battery cells 10 in the second column 13 is three, the three battery cells 10 in the first column 12 are arranged in the first direction x1, and the three battery cells 10 in the second column 13 are also arranged in the first direction x1, while the first column 12 and the second column 13 are arranged in the second direction x2, and the cooling plate 30 extends in the first direction x1 and is partially clamped between the first column 12 and the second column 13. Thus, it is convenient to improve the contact tightness of the cooling plate 30 and the battery cells 10, so as to enhance the cooling effect. In some application scenarios, the shape of the battery cell 10 is cylindrical, and when viewed in the first direction x1, the cooling plate 30 extends in a serpentine shape.

[0065] In some embodiments, the length of the cooling plate 30 in the first direction x1 is greater than the length of the first column 12 or the second column 13 in the first direction x1, so that the end portion 31 is located on the side of the first column 12 and the second column 13 facing the end plate 20 in the first direction x1. It can be understood that the cooling plate 30 extends in the first direction x1, and the length of the cooling plate 30 in the first direction x1 is greater than the length of the first column 12 or the second column 13 in the first direction x1, so that the cooling plate 30 has sufficient length to be connected with the plurality of battery monomers 10 in the first direction x1 in turn. The end portion 31 is located on the side of the first column 12 and the second column 13 facing the end plate 20 in the first direction x1, so that the end portion 31 is exposed outside the plurality of battery monomers 10 in the first direction x1, thereby facilitating the connection of the end portion 31 with the end plate 20. In some application scenarios, the two end portions 31 of the cooling plate 30 in the first direction x1 are respectively exposed on both sides of the plurality of battery monomers 10 in the first direction x1.

[0066] In summary, the battery module 5 provided by the present application includes the plurality of battery monomers 10, the end plate 20, the cooling plate 30, and the connecting piece 40. The plurality of battery monomers 10 are arranged in the first direction x1. The end plate 20 is arranged at at least one end of the plurality of battery monomers 10 in the first direction x1. The cooling plate 30 extends in the first direction x1, and the cooling plate 30 is connected with the battery monomers 10. The connecting piece 40 is located between the end portion 31 of the cooling plate 30 in the first direction x1 and the end plate 20, and respectively connects the end portion 31 and the end plate 20. Through the above-mentioned embodiments, the end portion 31 of the cooling plate 30 is connected with the end plate 20 through the connecting piece 40, so that the end plate 20 fixes and supports the end portion 31 of the cooling plate 30, thereby relieving the risk of damage to the cooling plate 30 due to the lack of fixation of the end portion 31 of the cooling plate 30.

[0067] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery module, characterized by, The battery module comprises: a plurality of battery cells arranged along a first direction; an end plate arranged at at least one end of the plurality of battery cells in the first direction; a cooling plate extending in the first direction and connected to the battery cells; a connecting member arranged between an end portion of the cooling plate in the first direction and the end plate and connecting the end portion and the end plate, respectively.

2. The battery module of claim 1, wherein, The cooling plate comprises an inlet and an outlet arranged at the end portion.

3. The battery module of claim 1, wherein, The battery module further comprises an adhesive arranged between the connecting member and the end portion and between the connecting member and the end plate, and the connecting member is connected to the end portion and the end plate, respectively, through the adhesive.

4. The battery module of claim 1, wherein, The number of the end plates is two, and the two end plates are arranged at two ends of the plurality of battery cells in the first direction, respectively, and the battery module further comprises a support plate extending along the first direction and connected to the two end plates, respectively.

5. The battery module according to any one of claims 1 to 4, characterized in that The connecting member is rigid foam.

6. The battery module of claim 1, wherein, The plurality of battery cells are arranged into a first column and a second column in the first direction, and the first column and the second column are arranged in a second direction perpendicular to the first direction, and the cooling plate is partially arranged between the first column and the second column to be connected to the plurality of battery cells in sequence.

7. The battery module of claim 6, wherein, The length of the cooling plate in the first direction is greater than the length of the first column or the second column in the first direction, so that the end portion is located at a side of the first column and the second column facing the end plate in the first direction.

8. A battery device characterized by comprising: The battery device comprises a box and the battery module according to any one of claims 1-7, and the box is formed with a receiving space, and the battery module is arranged in the receiving space.

9. The battery device of claim 8, wherein, The battery device further comprises a battery management system electrically connected to the battery module.

10. An electric device, characterized by The electric device comprises the battery device according to any one of claims 8 or 9.

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