Battery and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and an electric device, which comprises at least two battery monomers, an electrode connecting piece and a cooling plate, each battery monomer comprises a shell and a pole arranged on the shell, and the poles of at least two battery monomers are electrically connected through an electrode connecting piece; a built-in cooling device for accommodating a cooling medium is arranged in each battery monomer; the cooling plate is provided with a plurality of through holes in the thickness direction of the cooling plate, each pole extends out of one through hole and is electrically connected with the electrode connecting piece, and the cooling plate covers the face, provided with the poles, of the shell, is located between the shell and the electrode connecting piece and makes contact with at least one of the shell and the electrode connecting piece. The space between the battery monomer and the electrode connecting piece is fully utilized, so that the space utilization rate is improved, the energy density of the battery does not need to be sacrificed, and the temperature difference between the inside and the outside can be reduced and the performance of the battery can be improved by directly radiating the inside and the outside of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and an electrical device. Background Art

[0002] As a new type of secondary battery, lithium-ion battery has the advantages of high energy density, high capacity, light weight, small size, long cycle life and environmental protection, and has great application prospects in energy storage.

[0003] At present, the traditional heat dissipation method for modules and battery packs is to set a cooling plate on the outer surface of the battery cell, such as the top, bottom, side, etc. of the battery cell, to ensure the heat dissipation of the battery cell. The disadvantage of this method is that the existing cooling plate is a certain distance away from the surface of the battery cell, and its layout requires sacrificing the space in the dimension direction of the module and battery pack, resulting in low space utilization and low energy density of the module and battery pack. The heat dissipation performed by the existing cooling plate is indirect heat dissipation with low heat dissipation efficiency, and cannot play a role in the internal heat dissipation of the battery cell. The temperature difference between the inside and outside of the battery cell is large, which affects the battery performance.

[0004] Therefore, it is necessary to improve the existing technology.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0006] The utility model provides a battery and an electric device to solve the problems existing in the prior art.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] In a first aspect, the utility model provides a battery, comprising at least two battery cells, an electrode connector and a cooling plate; wherein:

[0009] Each battery cell comprises a shell and an electrode arranged on the shell, and the electrode of at least two battery cells is electrically connected through the electrode connector;

[0010] Each battery cell is provided with a built-in cooling device for accommodating a cooling medium;

[0011] The cooling plate is provided with a plurality of through holes along its thickness direction, and each pole extends out from a through hole. One end of the pole extending out of the through hole is electrically connected to the electrode connector. The cooling plate covers one side of the shell where the pole is provided, and is located between the shell and the electrode connector, and is in contact with at least one of the shell and the electrode connector.

[0012] Furthermore, each battery cell is provided with a built-in cooling device for the circulation of cooling medium, and each battery cell is provided with an inlet and an outlet for the cooling medium to flow into the built-in cooling device on its surface;

[0013] A cooling chamber is arranged inside the cooling plate, and an inlet interface connecting the cooling chamber and the inlet and an outlet interface connecting the cooling chamber and the outlet are provided on one side of the cooling plate facing the battery cell.

[0014] Furthermore, the shell includes a shell body and a top cover, the top cover is buckled with the opening of the shell body, the pole is arranged on the top cover, and the inlet and the outlet are opened on the top cover or the pole.

[0015] Furthermore, along the length direction of the top cover, the top cover is provided with a first pole and a second pole with opposite electrical properties at intervals, and each battery cell includes an inlet and an outlet, the outlet is provided close to the first pole, and the inlet is provided close to the second pole;

[0016] The cooling plate is provided with a plurality of first through holes and second through holes, each battery cell corresponds to a first through hole and a second through hole, the first pole of the battery cell extends from the first through hole, and the second pole extends from the second through hole;

[0017] Each battery cell corresponds to an inlet interface and an outlet interface, wherein the inlet interface corresponds to the position of the inlet, and the outlet interface corresponds to the position of the outlet.

[0018] Further, there is one cooling chamber, and each inlet interface and each outlet interface are in communication with the cooling chamber;

[0019] At least two battery cells are connected in series in sequence. Along the series path of the battery cells, in two adjacent battery cells, the outlet of the previous battery cell is communicated with the inlet of another battery cell through the cooling chamber.

[0020] Furthermore, the cooling plate includes a top plate, a bottom plate and four side plates, and the top plate, the bottom plate and the four side plates are together arranged to form a cooling chamber.

[0021] Furthermore, along the length direction of the top cover, the top cover is provided with a first pole and a second pole of opposite electrical properties at intervals; each battery cell includes two inlets and two outlets; one of the inlets and one of the outlets is provided close to the first pole and is respectively located on both sides of the first pole along the width direction of the top cover; the other inlet and the other outlet are provided close to the second pole and are respectively located on both sides of the second pole along the width direction of the top cover; the two inlets are located on one side of the top cover along the width direction thereof, and the two outlets are located on the other side of the top cover along the width direction thereof;

[0022] The cooling plate is provided with a plurality of first through holes and a plurality of second through holes, each battery cell corresponds to a first through hole and a second through hole, the first pole of the battery cell extends from the first through hole, and the second pole extends from the second through hole;

[0023] Each battery cell corresponds to two inlet interfaces and two outlet interfaces, one inlet interface corresponds to the position of an inlet, the other inlet interface corresponds to the position of another inlet, one outlet interface corresponds to the position of an outlet, and the other outlet interface corresponds to the position of another outlet.

[0024] Furthermore, there are two cooling chambers, and the two are not connected to each other;

[0025] At least two battery cells are connected in series in sequence. Along the series path of the battery cells, in two adjacent battery cells, one outlet of the previous battery cell is connected to an inlet of another battery cell through a cooling chamber, and the other outlet of the previous battery cell is connected to the other inlet of another battery cell through another cooling chamber.

[0026] Furthermore, the cooling plate is made of metal material, and an insulating layer is provided on a side thereof facing the battery cell.

[0027] In a second aspect, the utility model provides an electrical device, comprising the battery provided in the first aspect.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] The utility model provides a battery and an electrical device, wherein a built-in cooling device is arranged inside each battery cell, and a cooling plate connected to the built-in cooling device is arranged between the battery cell and the electrode connector, so that the space between the battery cell and the electrode connector is fully utilized, thereby improving the space utilization rate without sacrificing the energy density of the battery, and because the heat is directly dissipated inside and outside the battery cell, the temperature difference between the inside and outside of the battery cell can be reduced, thereby improving the battery performance.

[0030] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the structure (assembly) of the battery provided in the first embodiment of the utility model;

[0033] Figure 2 It is a schematic diagram of the structure (explosion) of the battery provided in the first embodiment of the utility model;

[0034] Figure 3 It is a structural (stereoscopic) schematic diagram of a battery cell provided in the first embodiment of the utility model;

[0035] Figure 4 It is a schematic diagram of the structure (top view) of a battery cell provided in the first embodiment of the utility model;

[0036] Figure 5 It is a schematic diagram of the structure (top view) of a battery cell provided in the first embodiment of the utility model;

[0037] Figure 6 It is a structural (stereoscopic) schematic diagram of a cooling plate provided in Embodiment 1 of the present utility model;

[0038] Figure 7 It is a schematic diagram of the structure (top view) of a battery cell provided in the first embodiment of the utility model;

[0039] Figure 8 It is a schematic diagram of the structure (top view) of a battery cell provided in the first embodiment of the present utility model.

[0040] Reference numerals:

[0041] Battery cell 1, electrode connector 2, cooling plate 3, inlet 4, outlet 5, pole 6, top cover 7;

[0042] Inlet interface 33, outlet interface 34, through hole 35, explosion-proof valve avoidance hole 36. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, ordinary technicians in this field can know that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0044] In the description of the present application, it should be understood that, unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as those commonly understood by those skilled in the art of the present application. In addition, any terminology used is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0045] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0046] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0047] Embodiment 1

[0048] In view of the above-mentioned defects of existing battery modules and battery packs, the applicant, based on many years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the battery module and battery pack more practical. After continuous research and design, and after repeated trial samples and improvements, the present utility model with real practical value was finally created.

[0049] Please refer to Figure 1-3 The present utility model provides a battery, comprising at least two battery cells 1, an electrode connector 2 and a cooling plate 3; wherein,

[0050] Each battery cell 1 includes a shell and a pole 6 disposed on the shell, and the poles 6 of at least two battery cells 1 are electrically connected through an electrode connector 2;

[0051] Each battery cell 1 is provided with a built-in cooling device for accommodating a cooling medium;

[0052] The cooling plate 3 is provided with a plurality of through holes 35 along its thickness direction, and each pole 6 extends out from a through hole 35. One end of the pole 1 extending out of the through hole 35 is electrically connected to the electrode connector 2. The cooling plate 3 covers one side of the outer shell where the pole 6 is provided, and is located between the outer shell and the electrode connector 2, and is in contact with at least one of the outer shell and the electrode connector 2.

[0053] It should be noted that a battery refers to at least two battery cells 1 connected together in a certain combination to form a battery combination with specific voltage and capacity characteristics, which can be a module or a battery pack, and the combination can be series, parallel or mixed.

[0054] The electrode connector 2, also known as the busbar, is a very important component of the battery module and battery pack. It connects different battery cells 1 and is also the main channel for current transmission in the battery module and battery pack.

[0055] This embodiment is dedicated to solving two key problems existing in the prior art: large temperature difference between the inside and outside of the battery cell, low space utilization, and low energy density of the battery cell. In order to solve these problems, this embodiment adopts a series of innovative designs and measures.

[0056] First, in order to solve the problem of large temperature difference between the inside and outside of the battery cell, this embodiment not only sets a cooling plate 3 on the outside of the battery cell 1, but also sets a built-in cooling device inside each battery cell 1. This dual cooling design not only allows direct heat dissipation from the inside and outside of the battery cell 1, but also optimizes the cooling plate 3 to be connected to the built-in cooling device, so that heat can be transferred from the inside of the battery cell 1 to the outside more quickly, thereby significantly reducing the temperature difference between the inside and outside of the battery cell 1. Such an improvement not only improves the performance of the battery cell 1 and the battery, but also prolongs the service life of the battery cell 1 and the battery.

[0057] Secondly, in order to solve the problem of low space utilization and low battery energy density, this embodiment makes full use of the space between the battery cell 1 and the electrode connector 2, that is, this embodiment cleverly sets the cooling plate 3 in this space. This design not only improves the overall space utilization, but also does not need to sacrifice the space in the battery size direction. Through such improvements, this embodiment successfully ensures the energy density of the battery, so that the battery can meet the application requirements of compact space while maintaining high performance.

[0058] In general, this embodiment effectively solves the problems of large temperature difference between the inside and outside of the battery cell, low space utilization, and low battery energy density in the prior art through innovative cooling design and space utilization solutions. These improvements not only improve the performance and life of the battery cell and battery, but also optimize the space utilization and energy density of the battery cell and battery, providing a more reliable and efficient energy solution for various applications.

[0059] It is understandable that the electrode connector 2 is a current converging path in the battery, and its heating phenomenon is inevitable, and in the entire battery, the heating phenomenon of the electrode connector 2 is also the most serious. In order to ensure that the performance of the battery is not affected, it is particularly important to effectively dissipate heat for the electrode connector 2. In this embodiment, after the cooling plate 3 is provided on the outside of the battery cell 1, by contacting the cooling plate 3 with the battery cell 1 and the electrode connector 2 respectively, a dual heat dissipation effect of the electrode connector 2 and the battery cell 1 is achieved.

[0060] Specifically, the cooling plate 3 is made of a material with good thermal conductivity, such as a metal material, which can quickly transfer the heat from the inside of the battery, the battery cell 1 and the electrode connector 2. At the same time, the cooling plate 3 is in close contact with the battery cell 1, so that the battery cell 1 can also effectively dissipate heat. This dual heat dissipation design not only improves the heat dissipation efficiency, but also reduces the performance degradation and safety hazards caused by heat accumulation.

[0061] In this embodiment, an insulating layer is provided on a side of the cooling plate 3 facing the battery cell 1 .

[0062] It should be noted that when the cooling plate is made of metal material, in order to ensure the safe operation of the battery, the presence of an insulating layer is necessary, which can prevent the current from passing through the surface of the cooling plate 3 to cause dangerous situations such as short circuit or electric shock.

[0063] In addition, although the shape of the battery cell 1 in this embodiment is shown as a square, the shape of the battery cell 1 includes but is not limited to a square, a cylinder, a hexahedron or a special shape, etc. Moreover, the shapes of different battery cells 1 may be the same or different.

[0064] The housing in this embodiment includes a housing body and a top cover 7, and the top cover 7 is buckled into the opening of the housing body. Figure 4 In the first implementation of this embodiment, the pole 6 is arranged on the top cover 7 of the battery cell 1, and correspondingly, the cooling plate 3 covers the outer surface of each top cover 7, and is arranged between the top cover 7 and the electrode connector 2, and at least contacts the top cover 7 and the electrode connector 2.

[0065] Each battery cell 1 is provided with a built-in cooling device for the circulation of cooling medium, and the surface of each battery cell 1 is provided with an inlet 4 and an outlet 5 for the cooling medium to flow into the built-in cooling device, wherein the inlet 4 and the outlet 5 are provided on the top cover 7. A cooling chamber is provided inside the cooling plate 3, and an inlet interface 33 connecting the cooling chamber and the inlet 4, and an outlet interface 34 connecting the cooling chamber and the outlet 5 are provided on a side of the cooling plate 3 facing the battery cell 1.

[0066] It should be noted that the top cover 7 is usually made of metal material, has certain strength and durability, and can withstand the hole-opening process of the inlet 4 and the outlet 5. The inlet 4 and the outlet 5 can be a hole in a circular or square shape. By opening the inlet 4 and the outlet 5 on the top cover 7, the cooling medium can be easily flowed in and out.

[0067] Please refer to Figure 3 and continue to refer to Figure 4 In this embodiment, along the length direction of the top cover 7, the top cover 7 is provided with a first pole and a second pole with opposite electrical properties at intervals, and each battery cell 1 includes an inlet 4 and an outlet 5, the outlet 5 is arranged close to the first pole, and the inlet 4 is arranged close to the second pole; correspondingly, the cooling plate 3 is provided with a plurality of first through holes and second through holes, each battery cell 1 corresponds to a first through hole and a second through hole, the first pole of the battery cell 1 extends out from the first through hole, and the second pole extends out from the second through hole; each battery cell 1 corresponds to an inlet interface 33 and an outlet interface 34, the inlet interface 33 corresponds to the position of the inlet 4, and the outlet interface 34 corresponds to the position of the outlet 5.

[0068] The inlet 4 and the outlet 5 may be arranged at intervals along the length direction of the battery cell 1, or may be arranged at intervals along the thickness direction of the battery cell 1. The specific arrangement may be arbitrarily selected according to actual needs.

[0069] Please refer to Figure 5 In a second implementation of this embodiment, the inlet 4 and the outlet 5 can be opened on the pole 6.

[0070] It should be noted that the pole 6 is also made of metal material and can withstand the hole-opening process of the inlet 4 and the outlet 5 . Therefore, the inlet 4 and the outlet 5 can also be opened on the pole 6 .

[0071] Although the top cover 7 has a larger area than the pole 6, which is more conducive to selecting the appropriate positions of the inlet 4 and the outlet 5 and designing the sizes, if the internal cooling device is arranged in the pole 6, it is chosen to open the inlet 4 and the outlet 5 on the pole 6, which can make the battery structure more compact and help improve the overall aesthetics and practicality of the battery.

[0072] It is understandable that no matter whether the inlet 4 and the outlet 5 are opened on the top cover 7 or the pole 6, multiple factors need to be considered comprehensively, including the battery structure, cooling effect, aesthetics and practicality, etc. Only on the basis of fully considering these factors can a high-performance and high-reliability battery be manufactured to meet the needs of various application scenarios.

[0073] Please refer to Figure 6 In this embodiment, on the one hand, only one cooling chamber may be provided inside the cooling plate 3, and one cooling chamber means that the entire cooling plate 3 is a hollow structure, and in this case, all inlet interfaces 33 and outlet interfaces 34 are connected through the cooling chamber. Specifically, the cooling plate 3 includes a top plate, a bottom plate and four side plates, and the top plate, the bottom plate and the four side plates are jointly arranged to form the cooling chamber.

[0074] On this basis, at least two battery cells 1 are connected in series in sequence. Along the series path of the battery cells 1 , in two adjacent battery cells 1 , the outlet 5 of the previous battery cell 1 is connected to the inlet 4 of the other battery cell 1 through the cooling chamber.

[0075] It should be noted that in this design, only one cooling chamber is provided inside the cooling plate 3. This simplified design reduces manufacturing costs and potential maintenance issues. Since there is only one cooling chamber, the flow direction of the cooling medium therein is single, and there are two flow paths: one is along the series path of the battery cell 1, flowing from one end of the cooling chamber to the other end, and the other is flowing in from the inlet 4 of the previous battery cell 1, passing through the cooling chamber, and then flowing out from the outlet 5 to the inlet 4 of the next battery cell 1. Under the two flow paths, the heat of the top cover 7, the pole 6 and the electrode connector 2 can be quickly taken away.

[0076] In this embodiment, on the other hand, two independent cooling chambers can be provided inside the cooling plate 3. Figure 7 , along the length direction of the top cover 7, the top cover 7 is provided with a first pole and a second pole of opposite electrical properties at intervals; each battery cell includes two inlets 4 and two outlets 5; one of the inlets 4 and the outlet 5 is arranged close to the first pole, and is respectively located on both sides of the first pole along the width direction of the top cover 7; the other inlet 4 and the other outlet 5 are arranged close to the second pole and are respectively located on both sides of the second pole along the width direction of the top cover 7; the two inlets 4 are located on one side of the top cover 7 along the width direction thereof, and the two outlets 5 are located on the other side of the top cover 7 along the width direction thereof.

[0077] Correspondingly, the cooling plate 3 is provided with a plurality of first through holes and a plurality of second through holes, each battery cell 1 corresponds to a first through hole and a second through hole, the first pole of the battery cell 1 extends from the first through hole, and the second pole extends from the second through hole; each battery cell 1 corresponds to two inlet interfaces 33 and two outlet interfaces 34, one inlet interface 33 corresponds to the position of an inlet 4, the other inlet interface 33 corresponds to the position of another inlet 4, one outlet interface 34 corresponds to the position of an outlet 5, and the other outlet interface 34 corresponds to the position of another outlet 5.

[0078] On this basis, at least two battery cells 1 are connected in series in sequence. Along the series path of the battery cells 1, in two adjacent battery cells 1, one outlet 5 of the previous battery cell 1 is connected to an inlet 4 of another battery cell 1 through a cooling chamber, and another outlet 5 of the previous battery cell 1 is connected to another inlet 4 of another battery cell 1 through another cooling chamber.

[0079] It should be noted that, unlike a single cooling chamber design, a multi-cooling chamber design sets at least two independent cooling chambers inside the cooling plate 3, which allows the cooling medium to be more evenly distributed over the entire cooling plate 3, thereby improving the cooling uniformity and efficiency.

[0080] It is understandable that, regardless of the single cooling chamber or multi-cooling chamber design, the surface of the cooling plate 3 is provided with an inlet interface 33 and an outlet interface 34. These interfaces are respectively connected to the cooling chamber and the inlet 4 and outlet 5 of the built-in cooling device, so that the cooling medium can flow into and out of the cooling plate 3 smoothly.

[0081] The design of the inlet interface 33 ensures that the cooling medium can flow evenly into each cooling chamber inside the cooling plate 3, while the outlet interface 34 ensures that the cooling medium can be discharged smoothly after flowing through the cooling plate 3. This design ensures the normal operation of the cooling system, thereby effectively reducing the operating temperature of the equipment and extending the service life of the equipment.

[0082] In the present invention, the battery cells 1 are connected in series, which has the following advantages:

[0083] (1) The flow rate of the cooling medium can be better controlled. Since the flow of the cooling medium is continuous, if there are only two battery cells 1, the cooling medium flows in from the inlet 4 of one of the battery cells 1 and flows out from the outlet 5 of the other battery cell 1. If there are several battery cells 1, the cooling medium flows in from the inlet 4 of the battery cell 1 arranged at the front, flows through the battery cells 1 in the middle, and flows out from the outlet 5 of the battery cell 1 arranged at the end. Therefore, the temperature and flow rate of the cooling medium can be better monitored and controlled to meet the cooling requirements.

[0084] (2) Stable pressure: Since the flow of the cooling medium is continuous, a stable pressure can be maintained. This helps ensure that each single cell 1 in the battery can get enough cooling medium and maintain a stable cooling effect.

[0085] In this embodiment, on one hand, an inlet 4 and an outlet 5 are provided on the surface of each battery cell 1;

[0086] Figure 4 The figure shows a situation where an inlet 4 and an outlet 5 are opened on the top cover 7. Figure 5 What is shown is a situation where an inlet 4 and an outlet 5 are opened on a pole 6 .

[0087] In two different battery cells 1 , the inlet 4 of each battery cell 1 is connected to the outlet 5 of another battery cell 1 through the cooling plate 3 .

[0088] It should be noted that under this design, the cooling medium flows from one battery cell 1 to another battery cell 1 via the cooling plate 3, so that the cooling medium can form a cooling channel inside the battery. In the process of the cooling medium flowing through the two battery cells 1, the cooling medium can absorb and take away the heat generated by each battery cell 1, thereby achieving a cooling effect.

[0089] Please refer to Figure 7-8 In this embodiment, at least two inlets 4 and at least two outlets 5 are provided on the surface of each battery cell 1;

[0090] Figure 7 The figure shows a situation where at least two inlets 4 and at least two outlets 5 are provided on the top cover 7. Figure 8 The example shown is a case where at least two inlets 4 and at least two outlets 5 are provided on the pole 6 .

[0091] In two different battery cells 1 , each inlet 4 of each battery cell 1 is connected to an outlet 5 of another battery cell 1 through the cooling plate 3 .

[0092] It should be noted that, whether at least two inlets 4 and two outlets 5 are provided on the top cover 7 or the pole 6, the purpose is to realize a dual-channel or multi-channel layout inside the battery so that the cooling medium can form two or more independent cooling channels inside the battery. Compared with one cooling channel, this design can not only significantly improve the cooling efficiency, but also has a better cooling effect.

[0093] Please refer again Figure 6 If an explosion-proof valve is also provided on the top cover 7 , the cooling plate 3 also needs to be provided with an explosion-proof valve avoidance hole 36 .

[0094] It should be noted that if there is no explosion-proof valve avoidance hole 36 on the cooling plate 3, the explosion-proof valve may not work normally, and even cause safety problems.

[0095] Although the terms such as battery cell, electrode connector, cooling plate, inlet, etc. are used more frequently in this application, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

[0096] The utility model provides a battery, comprising at least two battery cells, an electrode connector and a cooling plate. A built-in cooling device is arranged inside each battery cell, and a cooling plate connected to the built-in cooling device is arranged between the top cover of the battery cell and the electrode connector. Therefore, the space between the top cover and the electrode connector is fully utilized, thereby improving the space utilization rate without sacrificing the energy density of the battery cell and the battery. In addition, since the heat is directly dissipated inside and outside the battery cell, the temperature difference between the inside and outside of the battery cell can be reduced, thereby improving the battery performance.

[0097] Embodiment 2

[0098] The utility model provides an electric device, comprising the battery provided in the above-mentioned embodiment 1.

[0099] It should be noted that the electrical device may be, for example, an electronic device, an electric vehicle or a power storage system. Among them, the electronic device may be, for example, various computers, mobile phones, display screens and other equipment that use batteries as driving power sources. The electric vehicle may be, for example, an electric car, an electric tricycle, an electric bicycle, etc. that use batteries as driving power sources. The power storage system may be, for example, a power storage system that uses batteries as power storage sources.

[0100] The electrical device provided in this embodiment has the battery provided in the first embodiment, so the heat dissipation performance, energy density and electrochemical performance of the battery in the electrical device are good.

[0101] It is understandable that the electrical device includes not only a battery for providing electrical energy, but also an object for receiving electrical energy, namely, the electrical user. The battery is connected to the electrical user, and the electrical user can realize the set functions under the drive of electrical energy.

[0102] In summary, after reading this detailed disclosure, it will be apparent to those skilled in the art that the aforementioned detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, it will be appreciated by those skilled in the art that this application is intended to encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0103] In addition, certain terms in this application have been used to describe embodiments of the present application. For example, "one embodiment", "embodiment" and / or "some embodiments" mean that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. Therefore, it can be emphasized and should be understood that two or more references to "embodiment" or "one embodiment" or "alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics may be appropriately combined in one or more embodiments of the present application.

[0104] It should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to extract some of the features and understand them as separate embodiments. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0105] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A battery, characterized in that: It comprises at least two battery cells (1), an electrode connector (2) and a cooling plate (3); wherein Each of the battery cells (1) comprises a shell and an electrode (6) arranged on the shell, and the electrode (6) of at least two of the battery cells (1) are electrically connected via the electrode connector (2); Each of the battery cells (1) is provided with a built-in cooling device for accommodating a cooling medium; The cooling plate (3) is provided with a plurality of through holes (35) along its thickness direction, each pole (6) protrudes from one of the through holes (35), and one end of the pole (6) protruding from the through hole (35) is electrically connected to the electrode connector (2). The cooling plate (3) covers a side of the shell on which the pole (6) is provided, and is located between the shell and the electrode connector (2), and is in contact with at least one of the shell and the electrode connector (2).

2. The battery according to claim 1, characterized in that: Each battery cell (1) is provided with a built-in cooling device through which a cooling medium can flow, and a surface of each battery cell (1) is provided with an inlet (4) through which the cooling medium can flow into the built-in cooling device and an outlet (5) through which the cooling medium can flow out; A cooling chamber is provided inside the cooling plate (3), and an inlet interface (33) connecting the cooling chamber and the inlet (4) and an outlet interface (34) connecting the cooling chamber and the outlet (5) are provided on a side of the cooling plate (3) facing the battery cell (1).

3. The battery according to claim 2, characterized in that: The housing comprises a housing body and a top cover (7), the top cover (7) being snap-fitted to an opening of the housing body, the pole (6) being arranged on the top cover (7), and the inlet (4) and the outlet being arranged on the top cover (7) or the pole (6).

4. The battery according to claim 3, characterized in that: Along the length direction of the top cover (7), the top cover (7) is provided with a first pole and a second pole of opposite electrical properties at intervals, each of the battery cells (1) comprises an inlet (4) and an outlet (5), the inlet (4) is arranged close to the first pole, and the outlet (5) is arranged close to the second pole; The cooling plate (3) is provided with a plurality of first through holes and a plurality of second through holes, each of the battery cells (1) corresponds to one first through hole and one second through hole, the first pole of the battery cell (1) extends from the first through hole, and the second pole extends from the second through hole; Each battery cell (1) corresponds to one inlet interface (33) and one outlet interface (34), the inlet interface (33) corresponds to the position of the inlet (4), and the outlet interface (34) corresponds to the position of the outlet (5).

5. The battery according to claim 4, characterized in that: There is one cooling chamber, and each of the inlet interfaces (33) and each of the outlet interfaces (34) are in communication with the cooling chamber; At least two of the battery cells (1) are connected in series in sequence. Along the series path of the battery cells (1), in two adjacent battery cells (1), the outlet (5) of the preceding battery cell (1) is connected to the inlet (4) of the other battery cell (1) through the cooling chamber.

6. The battery according to claim 5, characterized in that: The cooling plate (3) comprises a top plate, a bottom plate and four side plates, and the top plate, the bottom plate and the four side plates are jointly arranged to form the cooling chamber.

7. The battery according to claim 3, characterized in that: Along the length direction of the top cover (7), the top cover (7) is provided with a first pole and a second pole of opposite electrical properties at intervals; each of the battery cells (1) comprises two inlets (4) and two outlets (5); one of the inlets (4) and one of the outlets (5) is arranged close to the first pole and is respectively located on both sides of the first pole along the width direction of the top cover (7); the other inlet (4) and the other outlet (5) are arranged close to the second pole and are respectively located on both sides of the second pole along the width direction of the top cover (7); the two inlets (4) are located on one side of the top cover (7) along the width direction thereof, and the two outlets (5) are located on the other side of the top cover (7) along the width direction thereof; The cooling plate (3) is provided with a plurality of first through holes and a plurality of second through holes, each of the battery cells (1) corresponds to one first through hole and one second through hole, the first pole of the battery cell (1) extends from the first through hole, and the second pole extends from the second through hole; Each battery cell (1) corresponds to two inlet interfaces (33) and two outlet interfaces (34); one inlet interface (33) corresponds to the position of one inlet (4); another inlet interface (33) corresponds to the position of another inlet (4); one outlet interface (34) corresponds to the position of one outlet (5); and another outlet interface (34) corresponds to the position of another outlet (5).

8. The battery according to claim 7, characterized in that: There are two cooling chambers, and the two cooling chambers are not connected to each other; At least two of the battery cells (1) are connected in series in sequence. Along the series path of the battery cells (1), in two adjacent battery cells (1), one of the outlets of the preceding battery cell (1) is connected to one of the inlets (4) of the other battery cell (1) through one of the cooling chambers, and the other of the outlets of the preceding battery cell (1) is connected to the other of the inlets (4) of the other battery cell (1) through another of the cooling chambers.

9. The battery according to any one of claims 1 to 8, characterized in that: The cooling plate (3) is made of metal material, and a side thereof facing the battery cell (1) is provided with an insulating layer.

10. An electrical device, characterized in that: Comprising a battery as described in any one of claims 1 to 9.

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