Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body, a plurality of battery monomers, a composite pressing strip and a connecting structure, the box body comprises a box body and an upper cover covering the box body; the box body is provided with an accommodating cavity, and the plurality of single batteries are arranged in the accommodating cavity; the composite pressing strip comprises a structural layer and a conductive layer which are sequentially arranged in the thickness direction of the composite pressing strip, the material strength of the structural layer is greater than that of the conductive layer, and the conductive layer is electrically connected with the plurality of single batteries; the connecting structures are arranged on the two opposite sides of the box body, each connecting structure comprises an insulating shell and a conductive piece arranged in the insulating shell, the insulating shells are installed on the box body, and the two ends of the conductive layer are correspondingly and electrically connected with the conductive pieces on the two sides of the box body. The size of the battery device in the height direction can be reduced, and the size of the battery device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric equipment. BACKGROUND

[0002] In the box body of the battery device, the box body is provided with a containing cavity, a plurality of battery monomers are installed in the containing cavity, a steel pressing strip is arranged on the opening of the containing cavity, the steel pressing strip is installed on the expansion beam of the box body, and the steel pressing strip is located above the battery monomers. The steel pressing strip can play a role of restraining the expansion force of the battery monomers. Meanwhile, a copper bar is arranged, which is used for electrical connection with each battery monomer. In the actual manufacturing process, a large height space needs to be reserved for the installation of the copper bar and the pressing strip, resulting in a large volume of the battery device. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a battery device and an electric equipment, which aims to at least improve the technical problem of large volume of the battery device.

[0004] According to some embodiments of the present application, the present application provides a battery device, comprising a box body, a plurality of battery monomers, a composite pressing strip and a connecting structure, wherein the box body comprises a box body and an upper cover covering the box body.

[0005] The box body is provided with a containing cavity, and a plurality of battery monomers are arranged in the containing cavity.

[0006] The composite pressing strip comprises a structural layer and a conductive layer arranged in the thickness direction of the composite pressing strip in sequence, the material strength of the structural layer is greater than that of the conductive layer, and the conductive layer is electrically connected with a plurality of battery monomers.

[0007] The connecting structure is arranged on the opposite sides of the box body, the connecting structure comprises an insulating shell and a conductive part arranged in the insulating shell, the insulating shell is installed on the box body, and the two ends of the conductive layer are electrically connected with the conductive parts on the two sides of the box body.

[0008] The composite pressing strip comprises a structural layer and a conductive layer arranged in the thickness direction in sequence, the structural layer can play a role of fixing the battery monomers, the conductive layer is electrically connected with each battery monomer to play a role of overcurrent, the composite pressing strip is designed by adopting the composite mode of the conductive layer and the structural layer, which can reduce the size of the battery device in the height direction, reduce the volume of the battery device, and play a role of fixing the battery monomers and overcurrent. Furthermore, through the design of the connecting structure, the conductive layer can play a role of overcurrent and reduce the risk of electrification of the box body caused by the electrification of the structural layer.

[0009] In some embodiments, the structural layer comprises a steel layer, the conductive layer comprises a copper layer, and the steel layer is arranged on the side of the copper layer away from the containing cavity.

[0010] By setting the steel layer on the side of the copper layer away from the accommodating cavity, the steel layer is outwardly arranged, and the copper layer can be protected by the steel layer with high structural strength.

[0011] In some embodiments, the copper layer is arranged to face the conductive member, and the battery device further comprises a locking member, the locking member being arranged on the conductive member through the steel layer and the copper layer.

[0012] By arranging the copper layer to face the conductive member, the electrical connection between the copper layer and the conductive member is facilitated, and the locking member is arranged on the conductive member through the steel layer and the copper layer, the locking member being locked on the locking surface in the steel layer, reducing the possibility of the locking surface being crushed to cause the locking member to loosen.

[0013] In some embodiments, the conductive member is made of copper.

[0014] By arranging the conductive member to be made of copper, the contact impedance can be reduced when the conductive member is electrically connected to the conductive layer also made of copper.

[0015] In some embodiments, the insulating shell comprises a shell body and an insulating layer arranged on the inner wall of the shell body, the shell body being connected to the box body, and the insulating layer being provided with a mounting groove accommodating the conductive member.

[0016] By arranging the insulating shell to comprise a shell body and an insulating layer, the welding with the box body is achieved through the shell body, improving the connection strength, and the insulating arrangement between the composite compression strip and the box body is achieved through the insulating layer, reducing the risk of the box body being electrified.

[0017] In some embodiments, the insulating layer comprises an insulating adhesive layer, the insulating adhesive layer filling the gap between the conductive member and the inner wall of the shell body.

[0018] By arranging the insulating adhesive layer in the gap between the conductive member and the shell body, the insulating effect can be achieved, and the adhesive layer is designed as an insulating material, which is convenient to manufacture and low in cost.

[0019] In some embodiments, the insulating layer further comprises a plurality of insulating sheets, the plurality of insulating sheets being inserted into the insulating adhesive layer and arranged around the inner wall of the shell body.

[0020] By arranging the plurality of insulating sheets to be inserted into the insulating adhesive layer and arranged around the inner wall of the shell body, the insulating performance can be further improved.

[0021] In some embodiments, the box body comprises a plurality of beam bodies, the plurality of beam bodies surrounding the accommodating cavity, the shell body being arranged on the side of the beam body away from the accommodating cavity, the side of the beam body away from the accommodating cavity being provided with a step, and the shell body being provided with an avoiding groove matched with the step.

[0022] By setting the step on the beam body and the avoiding groove matched with the step on the shell, the welding is more convenient and firm.

[0023] In some embodiments, the battery device further comprises an electrical connector and a connecting piece, one end of the electrical connector is electrically connected with the conductive piece, and the other end of the electrical connector is connected with the connecting piece.

[0024] The electrical connector plays a role of overcurrent, and the current received by the composite compression strip is transmitted to the battery management system through the conductive piece, the electrical connector and the connecting piece in sequence.

[0025] In some embodiments, the battery device further comprises an insulating sleeve, the composite compression strip is arranged in the insulating sleeve and partially extends out of the insulating sleeve.

[0026] The insulating sleeve can play a role of isolation, and reduce the possibility of electrical conduction between the conductive composite compression strip and the component which does not need to be electrically connected.

[0027] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to the structures shown in these drawings without creating any creative labor.

[0029] Figure 1 The structure schematic diagram of the vehicle of some embodiments of the present application;

[0030] Figure 2 The exploded structure schematic diagram of the battery of some embodiments of the present application;

[0031] Figure 3 The partial structure schematic diagram of the battery device of some embodiments of the present application from one perspective;

[0032] Figure 4 The structure schematic diagram of Figure 3 The enlarged structure schematic diagram at A;

[0033] Figure 5 The sectional structure schematic diagram of Figure 4

[0034] ​Figure 6 Part perspective structural schematic diagram of battery device for some embodiments of the present application;

[0035] Figure 7 For Figure 6 Enlarged structural schematic diagram at B.

[0036] Explanation of reference numerals:

[0037] 1000, vehicle;

[0038] 100, battery device; 200, controller; 300, motor;

[0039] 10, box body; 11, upper cover; 12, box body; 121, beam body; 122, step;

[0040] 20, battery cell;

[0041] 3, composite batten; 31, structural layer; 311, locking surface; 32, conductive layer; 4, connecting structure; 41, insulating shell; 411, shell; 412, insulating layer; 4121, insulating adhesive layer; 4122, insulating sheet; 413, avoiding groove; 42, conductive part; 5, locking part; 6, electrical connecting part; 7, insulating sleeve.

[0042] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0045] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0046] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements, or interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0048] In this application, the description of "up", "down", "front", "back", "left", "right" and the like is based on the orientation shown in the drawing, and is only used to explain the relative positional relationship between the components in the posture shown in the drawing. If the specific posture changes, the directional indication also changes accordingly.

[0049] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, 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 power battery, the demand of its market is also increasing. With the increasing demand for miniaturization of battery device, how to improve the volume energy density of battery device has been the problem that the battery industry is committed to break through. One of the ways to improve the volume energy density of battery device is to reduce the volume of battery device.

[0050] The applicant found through research that in the related art, the two ends of the steel pressing strip are respectively connected to the opposite sides of the box body, specifically connected to the expansion beams of the box body, and the middle part of the steel pressing strip spans the opening of the box body accommodating cavity. The steel pressing strip is arranged above the shoulder of each battery monomer to limit the expansion of the battery cell in thermal runaway. The copper bar is used to be electrically connected with each battery monomer, and is also connected with the connector of the battery device, and plays a role of current transmission. In the actual manufacturing process, the steel pressing strip is arranged below the copper bar. In order to avoid the contact between the steel pressing strip and the copper bar and the electrification of the box body, the steel pressing strip and the copper bar are arranged in a spaced manner. The related art sets the steel pressing strip and the copper bar in a spaced manner in the height direction of the box body, with the steel pressing strip below and the copper bar above. In another related art, in order to better play the insulation role, the copper bar and the steel pressing strip are wrapped with insulation materials, so as to realize the insulation between the two. As a result, a problem arises that whether the copper bar and the steel pressing strip are arranged in a spaced manner in the height direction of the box body, or insulation materials are additionally arranged, more space in the height direction of the battery device is occupied, resulting in an increase in the volume of the battery device.

[0051] Under the current design concept, the insulation between the copper bar and the steel pressing strip must be realized, otherwise the box body is electrified, which has great safety hazards.

[0052] In view of the above problems, the applicant provides a battery device, which comprises a composite pressing strip and a connecting structure. The composite pressing strip comprises a structure layer and a conductive layer arranged in the thickness direction of the composite pressing strip in sequence, and the conductive layer is electrically connected with a plurality of battery monomers. The connecting structure is arranged on the opposite sides of the box body, and the connecting structure comprises an insulating shell and a conductive piece arranged in the insulating shell. The insulating shell is mounted on the box body, and the two ends of the conductive layer are electrically connected with the conductive pieces on the two sides of the box body. The application breaks the traditional design idea and reverses the design idea. The conductive layer and the structure layer are designed as a whole, the distance between the conductive layer and the structure layer is reduced by using the integrated composite pressing strip design, and the height of the battery device is reduced. At the same time, in order to reduce the risk of electrification of the box body, the connecting structure is designed. The conductive piece not only realizes the output demand of the current of the conductive sheet, but also realizes the insulation between the structure layer and the box body through the insulating shell.

[0053] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be an electric device, which can be a fuel automobile, a gas automobile, or a new energy automobile, such as a pure electric vehicle, a hybrid electric vehicle, or a range extended electric vehicle. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0054] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0055] Please refer to Figure 2 , Figure 2 A disassembled structural schematic diagram of the battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. The box body 10 is used to provide a containing space for the battery cell 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include an upper cover 11 and a box body 12, and the upper cover 11 and the box body 12 are mutually covered to jointly define a containing space for containing the battery cell 20. The box body 12 can be a hollow structure with one end open, and the upper cover 11 can be a plate-shaped structure, which is covered on the open side of the box body 12 to jointly define the containing space with the box body 12; or the upper cover 11 and the box body 12 can both be hollow structures with one side open, and the open side of the upper cover 11 is covered on the open side of the box body 12. Of course, the box body 10 formed by the upper cover 11 and the box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0056] The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20, which are connected in series, in parallel, or in a mixed manner through a busbar component.

[0057] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0058] As an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 20 into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 by a cable tie.

[0059] In some embodiments, the battery device 100 can be a battery pack, and the battery pack includes the box 10 and one or more battery cell assemblies accommodated in the box 10.

[0060] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box 10 by fixing the battery module in the box 10.

[0061] As an example, the battery cell assembly can also be accommodated in the box 10 by directly fixing a plurality of battery cells 20 to the box 10.

[0062] In the battery device 100, the plurality of battery cells 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the plurality of battery cells 20 are connected in series and in parallel. The plurality of battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and the whole of the plurality of battery cells 20 is accommodated in the box 10. Of course, the battery device 100 can also be that the plurality of battery cells 20 are connected in series, in parallel, or in a mixed connection to form a battery module, and the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and the whole is accommodated in the box 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current combiner for realizing the electrical connection between the plurality of battery cells 20.

[0063] Each battery cell 20 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0064] Reference Figures 2-5 According to some embodiments of the present application, the present application provides a battery device 100 including a box 10, a plurality of battery cells 20, a composite compression strip 3, and a connecting structure 4. The box 10 includes a box body 12 and an upper cover 11 covering the box body 12.

[0065] The box body 12 is provided with an accommodation cavity, and the plurality of battery cells 20 are arranged in the accommodation cavity.

[0066] The composite compression strip 3 includes a structural layer 31 and a conductive layer 32 arranged in the thickness direction of the composite compression strip 3 in sequence. The material strength of the structural layer 31 is greater than that of the conductive layer 32, and the conductive layer 32 is electrically connected to the plurality of battery cells 20.

[0067] The connecting structure 4 is arranged on the opposite sides of the box body 12, and the connecting structure 4 comprises an insulating shell 41 and a conductive part 42 arranged in the insulating shell 41. The insulating shell 41 is arranged on the box body 12, and the two ends of the conductive layer 32 are electrically connected to the conductive part 42 on the two sides of the box body 12.

[0068] The composite pressing strip 3 refers to a pressing strip in an integrated structure, which constitutes a whole. The composite pressing strip 3 is generally in a strip shape or a long strip shape, and crosses the opening of the accommodating cavity. The middle part of the composite pressing strip 3 is arranged above the battery monomer 20, and the two ends of the composite pressing strip 3 are respectively connected to the two connecting structures 4 on the two sides of the box body 12. Specifically, the composite pressing strip 3 comprises a conductive layer 32 and a structural layer 31. The conductive layer 32 and the structural layer 31 can both be in a strip shape or a long strip shape, and are attached together in a stacked structure. It should be noted that the material strength of the structural layer 31 is greater than that of the conductive layer 32. The structural layer 31 is mainly used to realize the function of the steel pressing strip in the related art, and limits the expansion of the battery monomer 20 under thermal runaway. The conductive layer 32 mainly plays a role of copper bar electrical connection, and is electrically connected to each battery monomer 20, thereby playing a role of overcurrent. That is, the composite pressing strip 3 of the present application can play a role of fixing the battery monomer 20 and overcurrent. The purpose of the present application is to reduce the size of the battery device 100 in the height direction. The height direction refers to the direction perpendicular to the opening of the accommodating cavity, as shown in Figure 5 H. When the composite pressing strip 3 is stacked along the height direction of the box body 12, the thickness direction is also the height direction of the box body 12, as shown in Figure 5 H. By designing the conductive layer 32 and the structural layer 31 as a whole, the gap between the conductive layer 32 and the structural layer 31 can be reduced. However, the structural layer 31 is also electrified because it is designed and connected in contact with the conductive layer 32. If the structural layer 31 is directly arranged on the expansion beam of the box body 12, the box body 10 will be electrified, which poses a safety risk. Therefore, the connecting structure 4 is also designed in the present application. The connecting structure 4 comprises an insulating shell 41 and a conductive part 42 arranged in the insulating shell 41. The insulating shell 41 is arranged on the box body 12, and can realize the insulation arrangement of the conductive part 42 and the box body 12. For example, in the case of one composite pressing strip 3, one connecting structure 4 is arranged on each side of the box body 10. The two ends of the conductive layer 32 of the composite pressing strip 3 are respectively electrically connected to the two conductive parts 42 of the two connecting structures 4. The conductive part 42 can be connected to other electrical connecting parts of the battery device 100, so as to transmit current. Due to the isolation effect of the insulating shell 41, the electrification of the conductive layer 32 and the structural layer 31 will not electrify the box body 10, and the insulation effect of the box body 10 can still be realized. The extension direction of the composite pressing strip 3 is consistent with the arrangement direction of each row of battery monomers 20. There can be multiple rows of battery monomers 20, and therefore multiple composite pressing strips 3 can be arranged. Each composite pressing strip 3 corresponds to two connecting structures 4.

[0069] It should be noted that the structural layer 31 and the conductive layer 32 are attached to form a composite pressing strip 3, the conductive member 42 can play a flow effect, and the structural layer 31 can also play a flow effect, but the current transmission is mainly in the conductive layer 32. Similarly, the structural layer 31 plays a role in limiting the expansion of the battery monomer 20, and the conductive layer 32 can also provide structural strength to a certain extent, but mainly in the structural layer 31. In this way, the conductive layer 32 and the structural layer 31 can provide each other with certain required performance, thereby, compared with separate design, the amount of material can also be reduced.

[0070] In addition, in the prior art, it is necessary to separately wrap the structural layer 31 and the conductive layer 32 with insulating materials to play a mutual insulation role. The structural layer 31 and the conductive layer 32 are designed integrally in the present application, and no insulation is needed between the two, which also saves the use of insulating materials.

[0071] Regarding the specific design form of the conductive layer 32 and the structural layer 31, it can be in the form of being stacked along the height direction of the box body 12, or in the form of being stacked along the length direction or the width direction of the box body 12. It can be in the form of one conductive layer 32 and one structural layer 31, or in the form of one conductive layer 32 and multiple structural layers 31, or in the form of multiple conductive layers 32 and one structural layer 31, or in the form of multiple conductive layers 32 and multiple structural layers 31. Different cross-sectional forms can also be designed according to different stress forms of the composite pressing strip 3 under vibration impact conditions to ensure that the structural performance meets the requirements. In the present application, the conductive layer 32 and the structural layer 31 are both one, and are stacked along the height direction of the box body 10, which is described as an example.

[0072] In the above embodiment, the conductive layer 32 and the structural layer 31 are designed integrally to form the composite pressing strip 3, which can reduce the size of the battery device 100 in the height direction, reduce the volume of the battery device 100, and play a role in fixing the battery monomer 20 and overcurrent. And through the design of the connecting structure 4, the conductive layer 32 can not only play a role in overcurrent, but also reduce the risk of the box body 10 being electrified due to the electrification of the structural layer 31.

[0073] Reference Figure 5 In some embodiments, the structural layer 31 includes a steel layer, and the conductive layer 32 includes a copper layer, and the steel layer is arranged on the side of the copper layer away from the accommodation cavity.

[0074] The structural layer 31 can be made of steel material, and the steel layer can be a steel strip. The conductive layer 32 can be made of copper, and the copper layer can be a copper strip. The steel layer is arranged on the side of the copper layer away from the accommodating cavity, which means that the steel layer is arranged above the copper layer, or in other words, the steel layer is arranged on the side of the copper layer away from the battery monomer 20. The applicant would like to point out that this is different from the relative positions of the copper bar and the steel pressing strip designed in the related art. In the related art, in order to achieve the limitation of the steel pressing strip on the expansion of the battery monomer 20, the steel pressing strip is designed to be closer to the battery monomer 20. If the copper bar is designed to be closer to the battery monomer 20, the extrusion force generated by the expansion of the battery monomer 20 can cause the copper bar to deform, affecting the electrical connection between the copper bar and the battery monomer 20. In the present embodiment, the copper layer and the steel layer are made into a composite pressing strip 3, which has high strength as a whole and can reduce the deformation caused by the extrusion force generated by the expansion of the battery monomer 20. In addition, the steel has high structural strength, and the steel layer is designed on the top, that is, in the outward direction, which can protect the copper layer.

[0075] By arranging the steel layer on the side of the copper layer away from the accommodating cavity, the steel layer is arranged outwardly, which can protect the copper layer by the steel with high structural strength.

[0076] Referring to Figure 4 and Figure 5 In some embodiments, the copper layer faces the conductive member 42, and the battery device 100 further comprises a locking member 5. The locking member 5 passes through the steel layer and the copper layer to mount the composite pressing strip 3 on the conductive member 42.

[0077] The composite pressing strip 3 is connected to the connecting structure 4 from the top of the connecting structure 4. Here, the top refers to the side facing the opening of the accommodating cavity. The copper layer is designed below the steel layer, that is, close to the top surface of the box body 12. The locking member 5 is used to mount the composite pressing strip 3 on the conductive member 42. Here, the mounting can be detachable connection or fixed connection. The locking member 5 can be a threaded fastener, such as a bolt, a rivet or a screw. Referring to Figure 5 or Figure 7 The side facing the entry of the locking member 5 is called the locking surface 311. The locking member 5 passes through the steel layer and the copper layer to mount the composite pressing strip 3 on the conductive member 42. The locking surface 311 is on the steel layer, and the steel has high hardness, which can increase the surface hardness of the locking surface 311. For example, when the locking member 5 is a screw, the head of the screw is arranged on the locking surface 311 of the steel layer.

[0078] By arranging the copper layer to face the conductive member 42, the electrical connection between the copper layer and the conductive member 42 is facilitated. Moreover, the locking member 5 passes through the steel layer and the copper layer to mount the composite pressing strip 3 on the conductive member 42. The locking member 5 is locked on the locking surface 311 in the steel layer, which reduces the possibility that the locking surface 311 is crushed to cause the locking member 5 to loosen.

[0079] In some embodiments, the conductive member 42 is made of copper.

[0080] The conductive member 42 here mainly functions to conduct current, and is arranged inside the insulating shell 41. In theory, any material that can conduct electricity can be used to make the conductive member 42. In this embodiment, the conductive layer 32 is generally made of copper, and thus the conductive member 42 is also made of copper to reduce contact impedance.

[0081] By arranging the conductive member 42 to be made of copper and electrically connected to the conductive layer 32 also made of copper, the contact impedance can be reduced.

[0082] With reference to Figure 5 In some embodiments, the insulating shell 41 includes a shell body 411 and an insulating layer 412 arranged on the inner wall of the shell body 411, the shell body 411 is connected to the box body 12, and the insulating layer 412 is provided with a mounting groove for accommodating the conductive member 42.

[0083] The insulating shell 41 can be made of an insulating material, such as rubber or plastic, to achieve insulation between the conductive member 42 inside and the box body 12, which is an embodiment that the insulating shell 41 can achieve. In another specific embodiment, the insulating shell 41 can be composed of an outer shell body 411 and an insulating layer 412 arranged on the inner wall of the shell body 411. The outer shell body 411 can be made of a metal material, such as an aluminum shell. The material used for the box body 12 is also made of aluminum, so that the shell body 411 can be welded to the box body 12, facilitating the fixation of the connecting structure 4 and having great welding strength, which is not easy to fall off during use. At the same time, the aluminum shell has electrical conductivity, and in order to achieve insulation between the composite pressing strip 3 and the box body 12, an insulating layer 412 needs to be designed between the shell body 411 and the conductive member 42 to isolate the shell body 411 and the conductive member 42, thereby achieving insulation between the two. Therefore, an insulating layer 412 needs to be arranged on the inner wall of the shell body 411, which includes the bottom surface and the side surface of the shell body 411, and the inner wall forms a mounting groove for accommodating the conductive member 42.

[0084] By arranging the insulating shell 41 to include the shell body 411 and the insulating layer 412, the shell body 411 is welded to the box body 12 to improve the connection strength, and the insulating layer 412 is arranged between the composite pressing strip 3 and the box body 12 to achieve insulation between the two and reduce the risk of electrification of the box body 12.

[0085] With reference to 4 and Figure 5 In some embodiments, the insulating layer 412 includes an insulating adhesive layer 4121 that fills the gap between the conductive member 42 and the inner wall of the shell body 411.

[0086] The insulating glue layer 4121 refers to that the insulating layer 412 is formed by glue. Specifically, a layer of glue material can be coated on the inner wall of the shell 411, and the glue material herein is non-conductive glue material. The glue material to be coated is cured to form an insulating glue layer 4121, which is arranged between the conductive part 42 and the inner wall of the shell 411 to play an insulating role.

[0087] By arranging the insulating glue layer 4121 in the gap between the conductive part 42 and the shell 411, an insulating role can be played, and the glue layer is designed as an insulating material, which is convenient to manufacture and low in cost.

[0088] Referring to FIGS. 4 and Figure 5 In some embodiments, the insulating layer 412 further includes a plurality of insulating pieces 4122, which are inserted into the insulating glue layer 4121 and arranged around the inner wall of the shell 411.

[0089] The insulating piece 4122 refers to a sheet-shaped body with a certain hardness, which can be arranged at intervals around the inner wall of the shell 411 or arranged closely together. Of course, it can also be described that the plurality of insulating pieces 4122 are arranged around the outer wall of the conductive part 42. Because the insulating glue layer 4121 made of glue material may have a phenomenon of uneven thickness during coating, there may be a risk of electric leakage at a place with a smaller thickness, that is, the conductive part 42 and the shell 411 may be electrically connected at a place with a smaller thickness, resulting in that the box body 12 is electrified. It is also possible that although the coating is uniform during manufacturing, the conductive part 42 is connected to the shell 411 at a position where the insulating glue layer 4121 is broken due to impact or shaking during use, resulting in that the box body 12 is electrified. In order to improve the insulating performance of the insulating layer 412, a plurality of insulating pieces 4122 with relatively hard texture can be arranged in the insulating glue layer 4121, which are inserted into the insulating glue layer 4121 and can play a role in maintaining the thickness of the insulating glue layer 4121 and also play a role in insulation. In a specific embodiment, the insulating pieces 4122 can be arranged in one circle or multiple circles, which is not limited in the present application. An insulating ring can also be used instead of the plurality of insulating pieces 4122.

[0090] By arranging the plurality of insulating pieces 4122 inserted into the insulating glue layer 4121 and arranged around the inner wall of the shell 411, the insulating performance can be further improved.

[0091] Referring to Figure 5 In some embodiments, the battery device 100 further includes an insulating sleeve 7, and the composite compression strip 3 is arranged to pass through the insulating sleeve 7 and partially protrude from the insulating sleeve 7.

[0092] The insulating sleeve 7 is made of insulating material, because the composite pressing strip 3 is electrified as a whole, wrapping the composite pressing strip 3 with the insulating sleeve 7 can reduce the risk of electric leakage. The composite pressing strip 3 is arranged in the insulating sleeve 7, that is, the insulating sleeve 7 wraps the composite pressing strip 3. Of course, the composite pressing strip 3 is not wrapped entirely, and the composite pressing strip 3 is arranged to protrude out of the insulating sleeve 7 at the positions connected with the conductive part 42 and the locking part 5.

[0093] By arranging the insulating sleeve 7, the isolation effect can be achieved, and the possibility of electric conduction between the conductive composite pressing strip 3 and the components that do not need to be electrically connected can be reduced.

[0094] Referring to Figure 4 and Figure 7 In some embodiments, the box body 12 includes a plurality of beam bodies 121 arranged to form a containing cavity, the shell 411 is arranged on the side of the beam body 121 away from the containing cavity, the side of the beam body 121 away from the containing cavity is provided with a step 122, and the shell 411 is provided with an avoiding groove 413 matched with the step 122.

[0095] The beam body 121 can be an expansion beam, and a plurality of expansion beams form a frame of the box body 12, the containing cavity is formed in the frame, and the connecting structure 4 is arranged on the opposite sides of the box body 12, that is, the connecting structure 4 is arranged on the opposite two expansion beams. The shell 411 of the connecting structure 4 is arranged on the side of the beam body 121 away from the containing cavity, or in other words, the side away from the battery monomer 20, that is, the outer side of the beam body 121, and the outer side of the beam body 121 is provided with a step 122, the height of the step 122 is lower than the height of the beam body 121 itself, that is, lower than the opening of the containing cavity. The shell 411 is provided with an avoiding groove 413 corresponding to the position of the step 122, and the avoiding groove is actually a gap formed in the bottom of the shell 411. When the shell 411 is installed on the box body 12, the step 122 extends into the avoiding groove 413, so that the shell 411 can be supported, and the shell 411 and the beam body 121 can be welded subsequently. And through the cooperation of the step 122 and the avoiding groove 413, the connecting structure 4 has a larger matching surface with the beam body 121, and the welding area after welding is larger, and the connection is more firm.

[0096] By arranging the step 122 on the beam body 121 and the avoiding groove 413 matched with the step 122 on the shell 411, the welding is more convenient and firm.

[0097] The shell 411 includes a base 4111 and an extending segment 4112 extending from the base 4111 to the top surface of the box body 12, the base 4111 is connected to the outer side of the box body 12, and the top surface of the box body 12 faces the composite pressing strip 3.

[0098] The top surface of the box body 12 refers to the surface of the opening of the accommodating cavity, the position of the accommodating cavity of the box body 12 is the inner side, the position of the outer periphery of the box body 12 refers to the shell, the base 4111 is connected to the outer side of the box body 12, and the protruding section 4112 is arranged for connection with the composite compression strip 3. Compared with the base 4111 mounted on the top surface of the box body 12, the height of the battery device 100 can be reduced. At the same time, by arranging the protruding section 4112 for connecting the composite compression strip 3, the risk of the composite compression strip 3 bending or sagging and contacting the box body 12 to cause the box body 12 to be electrified can be reduced.

[0099] By arranging the shell 411 to include the base 4111 and the protruding section 4112, the base 4111 is connected to the outer side of the box body 12 to reduce the space occupation in the height direction, the protruding section 4112 protrudes to the top surface of the box body 12, specifically protrudes above the expansion beam, facilitates connection with the composite compression strip 3, and reduces the risk of the composite compression strip 3 bending or sagging and contacting the box body 12 to cause the box body 12 to be electrified.

[0100] Referring to Figure 6 In some embodiments, the battery device 100 further includes an electrical connecting piece 6 and a connector, one end of the electrical connecting piece 6 is electrically connected with the conductive piece 42, and the other end of the electrical connecting piece 6 is connected with the connector.

[0101] The electrical connecting piece 6 can be a copper sheet, and the connector refers to a connecting device in the battery device 100, which can be connected with a battery management system or other systems in the battery. By electrically connecting the conductive piece 42 and the connector through the electrical connecting piece 6, current can be transmitted to the battery control system.

[0102] The electrical connecting piece 6 plays a role of overcurrent, and the current of the composite compression strip 3 can be transmitted to the battery management system through the conductive piece 42, the electrical connecting piece 6 and the connector in turn.

[0103] According to some embodiments of the present application, the present application provides a battery device 100, comprising a box 10, a plurality of battery monomers 20, a composite pressing strip 3, an insulating sleeve 7, a locking piece 5 and a connecting structure 4, the box 10 comprises a box body 12 and an upper cover 11 covering the box body 12; the box body 12 is provided with a containing cavity, and the plurality of battery monomers 20 are arranged in the containing cavity; the composite pressing strip 3 comprises a steel layer and a copper layer arranged in sequence in the thickness direction of the composite pressing strip 3, the conductive layer 32 is electrically connected with the plurality of battery monomers 20, the steel layer is arranged on the side of the copper layer away from the containing cavity; the copper layer is arranged to face the conductive piece 42, the locking piece 5 passes through the copper layer from the steel layer to install the composite pressing strip 3 on the conductive piece 42; the insulating sleeve 7 is wrapped around the outer periphery of the composite pressing strip 3. The connecting structure 4 is arranged on the opposite sides of the box body 12, the connecting structure 4 comprises an insulating shell 41 and a conductive piece 42 arranged in the insulating shell 41, the insulating shell 41 comprises a shell body 411 and an insulating layer 412 arranged on the inner wall of the shell body 411, the insulating layer 412 comprises an insulating adhesive layer 4121 and a plurality of insulating sheets 4122, the insulating adhesive layer 4121 fills the gap between the conductive piece 42 and the inner wall of the shell body 411. The insulating adhesive layer 4121 is provided with a mounting groove for accommodating the conductive piece 42, the plurality of insulating sheets 4122 are arranged around the inner wall of the shell body 411, the shell body 411 comprises a base 4111 and an extension segment 4112 extending from the base 4111 to the top surface of the box body 12, the base 4111 is connected to the outer side of the box body 12, and the two ends of the conductive layer 32 are electrically connected with the conductive pieces 42 on the two sides of the box body 12. The present application has the advantages of being able to reduce the space occupation in the height direction of the battery device 100, thereby reducing the volume of the battery device 100, and saving the use of materials.

[0104] According to some embodiments of the present application, the present application provides a power consuming device, the power consuming device comprising a device body and the above-mentioned battery device 100, and the battery device 100 is arranged in the device body. The above-mentioned power consuming device can be a vehicle 1000. Since the power consuming device comprises any one of the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by any one of the above-mentioned technical solutions, which will not be repeated here.

[0105] The above-mentioned is only an optional embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that, It includes a housing, multiple battery cells, composite pressure strips, and connecting structures. The housing includes a housing body and a top cover that covers the housing body. The box body is provided with a receiving cavity, and multiple battery cells are disposed in the receiving cavity; The composite pressure strip includes a structural layer and a conductive layer sequentially disposed in the thickness direction of the composite pressure strip. The material strength of the structural layer is greater than that of the conductive layer. The conductive layer is electrically connected to a plurality of the battery cells. The connection structure is disposed on opposite sides of the box body. The connection structure includes an insulating shell and a conductive element disposed within the insulating shell. The insulating shell is installed on the box body, and the two ends of the conductive layer are electrically connected to the conductive elements on both sides of the box body.

2. The battery device as claimed in claim 1, characterized in that, The structural layer includes a steel layer, and the conductive layer includes a copper layer, with the steel layer disposed on the side of the copper layer opposite to the receiving cavity.

3. The battery device as claimed in claim 2, characterized in that, The copper layer is disposed facing the conductive element, and the battery device further includes a locking element that passes through the copper layer from the steel layer to install the composite pressure strip onto the conductive element.

4. The battery device as claimed in claim 3, characterized in that, The conductive component is made of copper.

5. The battery device according to any one of claims 1-4, characterized in that, The insulating housing includes a shell and an insulating layer disposed on the inner wall of the shell. The shell is connected to the box body, and the insulating layer is provided with a mounting groove for accommodating the conductive component.

6. The battery device as claimed in claim 5, characterized in that, The insulating layer includes an insulating adhesive layer that fills the gap between the conductive element and the inner wall of the housing.

7. The battery device as claimed in claim 6, characterized in that, The insulating layer also includes a plurality of insulating sheets, which are inserted into the insulating adhesive layer and arranged around the inner wall of the housing.

8. The battery device as claimed in claim 5, characterized in that, The box body includes multiple beams, which enclose the receiving cavity. The shell is located on the side of the beams away from the receiving cavity. A step is provided on the side of the beams away from the receiving cavity, and the shell is provided with a clearance groove that cooperates with the step.

9. The battery device according to any one of claims 1-4, characterized in that, The battery device further includes an electrical connector and a connector, one end of the electrical connector being electrically connected to the conductive element, and the other end of the electrical connector being connected to the connector.

10. The battery device according to any one of claims 1-4, characterized in that, The battery device also includes an insulating sleeve, and the composite pressure strip passes through the insulating sleeve and partially extends out of the insulating sleeve.

11. An electrical appliance, characterized in that, The electrical equipment includes a device body and a battery device according to any one of claims 1-10, wherein the battery device is disposed on the device body.

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