CN219677471U

CN219677471U - Battery device

Info

Publication number: CN219677471U
Application number: CN202320991816.XU
Authority: CN
Inventors: 颜廷露; 王娟
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-09-12
Anticipated expiration: 2033-04-27

Abstract

The present disclosure relates to the field of battery technologies, and in particular, to a battery device, where the battery device includes: the battery pack comprises two rows of batteries and a heat exchange plate, the heat exchange plate is arranged between the two rows of batteries, the batteries are provided with a first connecting area and a second connecting area, the first connecting area is provided with a first connecting adhesive layer, the second connecting area is provided with a second connecting adhesive layer, the first connecting adhesive layer is connected with the batteries and the heat exchange plate, and the second connecting adhesive layer is connected with adjacent batteries; the bonding strength between the battery and the heat exchange plate is greater than that between the battery and the battery, so that the connection stability of the battery and the heat exchange plate is improved, the problem that the battery and the heat exchange plate fall off due to vibration is avoided, and the failure rate of the battery device is reduced to at least a certain extent.

Description

Battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

With the development and progress of technology, electric vehicles are increasingly used. Battery devices are often provided in electric vehicles for powering the electric vehicles. The battery device comprises a battery and a cooling device, wherein the cooling device is used for radiating heat of the battery. Because the application working condition of the electric vehicle is complex, the battery and the cooling device may fall off due to vibration or jolt in the practical application process, and the battery device may be damaged.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to a battery device that further reduces the failure rate of the battery device at least to some extent.

The present disclosure provides a battery device including:

the battery pack comprises two rows of batteries and a heat exchange plate, wherein the heat exchange plate is arranged between the two rows of batteries, the batteries are provided with a first connecting area and a second connecting area, the first connecting area is provided with a first connecting adhesive layer, the second connecting area is provided with a second connecting adhesive layer, the first connecting adhesive layer is connected with the batteries and the heat exchange plate, and the second connecting adhesive layer is connected with adjacent batteries;

the bonding strength between the battery and the heat exchange plate is greater than that between the batteries.

The battery device that this disclosed embodiment provided includes the group battery, the lateral part of battery is located to the heat exchanger plate in the group battery, the battery has first connection district and second connection district, first connection district on the battery is provided with first connection glue film, the second connection district is provided with the second connection glue film, first connection glue film connects battery and heat exchanger plate, adjacent battery is connected to the second connection glue film, bonding strength between battery and the heat exchanger plate is greater than bonding strength between battery and the battery, the connection stability of battery and heat exchanger plate has been promoted, the problem that battery and heat exchanger plate drop because the vibration leads to has been avoided, the fault rate of battery device has been reduced to a certain extent at least.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic view of a battery device provided in an exemplary embodiment of the present disclosure;

fig. 2 is an enlarged partial schematic view of a battery device according to an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view of another battery device provided in an exemplary embodiment of the present disclosure;

fig. 4 is a partial enlarged view of a battery device provided in an exemplary embodiment of the present disclosure;

fig. 5 is a schematic view of a battery provided in an exemplary embodiment of the present disclosure.

Reference numerals

10. A battery pack; 11. a battery string; 110. a battery; 111. a pole; 112. a housing; 101. a first cover plate; 102. a housing member; 103 a second cover plate; 12. a heat exchange plate; 121. a gap; 13. a first connection adhesive layer; 14. a second connecting adhesive layer; 20. an insulating member; 30. a case; 31. a bottom plate; 32. and (3) a structural beam.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

Exemplary embodiments of the present disclosure provide a battery device, as shown in fig. 1 and 2, including: at least one battery pack 10, the battery pack 10 comprises two rows of batteries 110 and a heat exchange plate 12, the heat exchange plate 12 is arranged between the two rows of batteries 110, the batteries 110 are provided with a first connecting area and a second connecting area, the first connecting area is provided with a first connecting adhesive layer 13, the second connecting area is provided with a second connecting adhesive layer 14, the first connecting adhesive layer 13 is connected with the batteries 110 and the heat exchange plate 12, and the batteries 110 adjacent to the second connecting adhesive layer 14; wherein the bonding strength between the cells 110 and the heat exchange plates 12 is greater than the bonding strength between the cells.

The battery device provided by the embodiment of the disclosure includes a battery pack 10, a heat exchange plate 12 is arranged at the side part of the battery in the battery pack 10, the battery 110 is provided with a first connection area and a second connection area, the first connection area on the battery 110 is provided with a first connection adhesive layer 13, the second connection area is provided with a second connection adhesive layer 14, the first connection adhesive layer 13 is connected with the battery 110 and the heat exchange plate 12, the second connection adhesive layer 14 is connected with the adjacent battery 110, the bonding strength between the battery 110 and the heat exchange plate 12 is greater than that between the battery and the battery, the connection stability of the battery 110 and the heat exchange plate 12 is improved, the problem that the battery 110 and the heat exchange plate 12 fall off due to vibration is avoided, and the failure rate of the battery device is reduced to at least a certain extent.

Further, as shown in fig. 3, the battery device provided in the embodiment of the disclosure may further include an insulating member 20, a case 30, and a battery bracket, where the case 30 has one or more battery compartments, the battery pack 10 is disposed in the battery compartment, the battery bracket is disposed in the battery compartment, and the battery bracket is disposed between the bottom wall of the battery compartment and the battery pack 10. The insulating member 20 is provided between the adjacent battery packs 10, the insulating member 20 serves to insulate the adjacent battery packs 10, and the insulating member 20 can prevent heat from being transferred between the adjacent battery packs 10.

The following will describe each part of the battery device provided in the embodiments of the present disclosure in detail:

the battery device includes one or more battery packs 10. The battery pack includes two rows of cells and heat exchange plates 12, for example, two rows of cells 11 are respectively disposed on both sides of the heat exchange plates 12. Of course, in practical applications, the cells 110 and the heat exchange plates 12 in the battery pack 10 may be arranged in other manners, which is not limited to the embodiment of the disclosure.

When a plurality of battery packs 10 are provided in the battery compartment, the plurality of battery packs 10 may be arranged in a direction perpendicular to the battery row 11. In the manufacture of the battery device, the battery row 11 and the heat exchange plate 12 are connected by the first connection glue layer 13 to form the battery pack 10, and the battery pack 10 is integrally mounted to the battery compartment.

The cells 110 have a first connection region and a second connection region, a first connection glue layer 13 is provided between the first connection region and the heat exchange plate 12, a second connection glue layer 14 is provided at the second connection region, and the second connection glue layer 14 connects two adjacent cells 110. For example, the cells connected by the second connection adhesive layer 14 are two adjacent cells in one cell array 10, or the cells connected by the second connection adhesive layer 14 are two cells in two cell arrays 10 respectively. In the battery device, the height of the cells 110 is greater than the height of the heat exchange plate 12, as shown in fig. 4, between two adjacent rows of cells 110, there is a gap 121 between the regions at the top, the second connection glue layer 14 may fill the gap 121, and the second connection glue layer 14 fills the space between adjacent cells 110 in a row of cells.

The first connection region and the second connection region may be connected, and on the basis of this, the first connection adhesive layer 13 and the second connection adhesive layer 14 are connected. That is, the gaps between the battery strings 11 and the heat exchange plates 12 are filled with the first and second connection adhesive layers 13 and 14 to increase the stability of the battery device.

Optionally, the minimum distance between two adjacent cells 110 in the cell array 11 is greater than 0, and the second connection glue layer 14 is disposed between two adjacent cells 110 in the cell array 11. That is, a gap is formed between two adjacent cells 110 in the cell array 11, and the gap is filled with the second adhesive layer 14.

The first connection adhesive layer 13 is a double-sided adhesive layer or a heat conducting structure adhesive layer. The second joint glue layer 14 is a potting glue layer. The bonding strength between the cells 110 and the heat exchange plates 12 is 2Mpa-7Mpa, for example, the bonding strength between the cells 110 and the heat exchange plates 12 is 2Mpa, 3Mpa, 4Mpa, 7Mpa, or the like. The bonding strength between the cells is 0.5Mpa-4Mpa, for example, the bonding strength between the cells is 0.5Mpa, 0.8Mpa, 1Mpa, 2Mpa or 4Mpa, etc.

It can be appreciated that in the embodiment of the present disclosure, the bonding strength between the battery and the heat exchange plate is greater than that between the battery and the battery, so that the connection strength between the battery 110 and the heat exchange plate 12 is great, thereby improving the connection stability between the battery 110 and the heat exchange plate 12. In the presently disclosed embodiments, the bond strength may also be considered as the structural stability of the bond line connection, i.e., the bond strength between the cell 110 and the heat exchanger plate 12 is greater than the bond strength between the cells 110.

In a possible embodiment, the battery pack 10 may include a first battery row, a second battery row, and a heat exchange plate 12, where the first battery row and the second battery row are disposed on both sides of the heat exchange plate 12, respectively. That is, the battery pack 10 is composed of a heat exchange plate 12 and battery strings 11 at both sides of the heat exchange plate 12.

The first battery row is connected with the heat exchange plate 12 through a first connection adhesive layer 13, the second battery row is connected with the battery 110 and the heat exchange plate 12 through the first connection adhesive layer 13, and the battery rows 11 on two sides of the second battery row are cooled through the heat exchange plate 12. And the first cell line, the second cell line and the heat exchange plate 12 are integrated into the battery pack 10 and then mounted to the battery compartment during the manufacturing process of the battery device.

The cells 110 in the cell array 11 are connected to the heat exchange plate 12 through the first connection glue layer 13, a containing space is defined by the heat exchange plate 12 and the adjacent cells 110 in the cell array 11, and a second connection glue layer is filled in the containing space and forms the second connection glue layer 14. The second adhesive layer 14 connects adjacent cells 110 in the cell array 11, and a part of the second adhesive layer 14 is connected to the heat exchange plate 12, that is, the second adhesive layer 14 is not limited to being connected to the cells 110. And in practice the second bond coat 14 also serves to support adjacent cells 110 after curing.

By way of example, the battery 110 in embodiments of the present disclosure may be a cylindrical battery. As shown in fig. 5, the battery 110 includes a housing 112, a battery cell and a pole 111, wherein a receiving space is provided in the housing 112, and the battery cell is disposed in the receiving space. The pole 111 is provided in the housing 112, and the pole 111 is connected to the battery cell. The post 111 may serve as one electrode of the battery 110 and the housing 112 serves as the other electrode of the battery 110. For example, the post 111 is a positive electrode of the battery 110, and the case 112 is a negative electrode of the battery 110.

The housing 112 has a cylindrical structure, the housing 112 may include a housing member 102, a first cover plate 101 and a second cover plate 103, the housing member 102 forms a side surface of the battery 110, and the housing member 102 has a thin-walled cylindrical structure with two open ends. The first cover plate 101 and the second cover plate 103 are of circular plate-shaped structures, and the first cover plate 101 and the second cover plate 103 are respectively plugged at two ends of the shell member 102.

The post 111 may be provided to the first cover plate 101 or the second cover plate 103. By way of example, the pole 111 is provided on the first cover plate 101, and then an explosion-proof valve may be provided on the second cover plate 103. The explosion-proof valve of the battery 110 faces the battery bracket, that is, when the battery 110 is mounted in the battery device, the end of the battery 110 where the first cover plate 101 is disposed faces upward, and the end of the battery 110 where the second cover plate 103 is disposed faces downward.

One of the first cover plate 101 and the second cover plate 103 may be integrally formed with the housing member 102, and the other of the first cover plate 101 and the second cover plate 103 may be connected to the housing member 102 by welding or riveting. For example, the first cover plate 101 and the housing member 102 are integrally formed by punching, and the second cover plate 103 is connected to the housing member 102 by welding.

The materials of the first cover plate 101, the housing member 102, and the second cover plate 103 may be stainless steel, aluminum, nickel, cadmium, manganese, tungsten, copper, or the like. When the first cover plate 101 and the housing member 102 are integrally formed, the materials of the first cover plate 101 and the housing member 102 are the same, for example, the materials of the first cover plate 101 and the housing member 102 are stainless steel. The material of the second cover plate 103 may be the same as or different from the housing member 102, which is not limited in this embodiment.

In the embodiment of the disclosure, the battery 110 is taken as an example of a cylindrical battery, and the battery 110 is not limited to this in practical application, and the battery 110 may be a triangular prism battery 110, a square prism battery 110, or a hexagonal prism battery 110, for example.

The heat exchange plate 12 is used for cooling the battery 110, a heat exchange medium channel is arranged in the heat exchange plate 12, the heat exchange medium flows in the heat exchange plate 12 along the heat exchange medium channel, and heat generated by the battery 110 is transmitted to the outside of the battery device through the heat exchange medium. Of course, in some embodiments, the heat exchange plate 12 may also be used to heat the battery 110, for example, in a severe cold environment, a heat exchange medium with a higher temperature may be transmitted through the heat exchange plate 12 to heat the battery 110.

When the battery 110 is a cylindrical battery, the heat exchange plate 12 may have an S-shaped bent structure. The heat exchange plate 12 includes a plurality of bending parts, the bending parts and the batteries are in one-to-one correspondence, and the connection parts of the bending parts and the batteries are first connection areas. For example, the heat exchange plate 12 may include a plurality of first bending sections and a plurality of second bending sections, where the first bending sections and the second bending sections are arranged at intervals, that is, the plurality of first bending sections in the heat exchange plate 12 are arranged along the arrangement direction of the battery 110, and the second bending sections are disposed between two adjacent first bending sections and connected with the first bending sections at two ends respectively. The batteries 110 in the first battery row and the second battery row are arranged in a staggered manner, that is, the axes of the batteries 110 in the first battery row and the batteries 110 in the second battery row are not in the same cross section, and the cross section is a section perpendicular to the arrangement direction of the batteries 110.

The heat exchange medium channels in the first bending section and the second bending section are communicated. The first bending section and the second bending section can be arc-shaped, and the circle centers of the first bending section and the second bending section are positioned on different sides. For example, the center of the first bending section is located at one side of the first bending section close to the first battery column, and the center of the second bending section is located at one side of the second bending section close to the second battery column.

The number of first bending sections in the heat exchange plate 12 is the same as the number of cells 110 in the first cell line, and the number of second bending sections is the same as the number of cells 110 in the second cell line. The batteries 110 in the first battery column are respectively adhered to the corresponding first bending sections through the first connecting glue, and the batteries 110 in the second battery column are respectively adhered to the corresponding second bending sections through the first connecting glue.

Optionally, a transition section may be disposed between the first bending section and the second bending section, and two ends of the transition section are respectively connected with the first bending section and the second bending section. The heat exchange medium channels in the transition section are respectively communicated with the heat exchange medium channels in the first bending section and the heat exchange medium channels in the second bending section. The transition section may be a linear structure or the transition section may be an arcuate structure, and embodiments of the present disclosure are not limited thereto.

The dimension of the orthographic projection of the first connection region on the reference plane in the arrangement direction of the cells 110 is smaller than the dimension of the cells 110 in the arrangement direction of the cells 110, and the reference plane is parallel to the arrangement direction of the cells 110 and perpendicular to the bottom surface of the cells 110. That is, the width of the first adhesive layer 13 is smaller than the diameter of the battery 110, and the first adhesive layer 13 is not fully distributed on the half cylindrical surface of the battery 110 facing the heat exchange plate 12. The area of the battery 110 other than the first connection area is a second connection area, and the second connection area is connected with the second connection adhesive layer 14.

In a possible embodiment, the cells 110 in the first cell line are first cells and the cells 110 in the second cell line are second cells. A first connection adhesive layer 13 is disposed between the first battery and the first bending section, the first bending section is of an arc structure concentrically disposed with the first battery, and the radius of the first bending section is greater than that of the battery 110. A first connection adhesive layer 13 is disposed between the second battery and the second bending section, the second bending section has a circular arc structure concentric with the second battery, and the radius of the second bending section is larger than that of the battery 110.

Two adjacent cells 110 in the cell array 11, the heat exchange plate 12, and the first connection adhesive layers 13 corresponding to the two cells 110 enclose a receiving space, and a second connection adhesive layer 14 is formed in the receiving space. The second connection glue layer 14 connects the adjacent two cells 110 and the transition section of the heat exchanger plate 12.

In another possible embodiment, the first bending section and the first cell may also be arranged non-concentrically, and the second cell and the second bending section may also be arranged non-concentrically. A first connection glue layer 13 may be provided between the partial region of the first bending section and the first battery, and a first connection glue layer 13 may be provided between the second bending section and the partial region of the second battery. For example, the first adhesive layer 13 is disposed in a middle region of the first bending section, and the first adhesive layer 13 is disposed in a middle region of the second bending section.

When the first connecting adhesive layer 13 is disposed in the partial areas of the first bending section and the second bending section, the area of the first bending section where the first connecting adhesive layer 13 is not disposed may be connected with the second connecting adhesive layer 14. The area of the second bending section where the first connection glue layer 13 is not provided may be connected to the second connection glue layer 14.

The insulating member 20 is provided between the adjacent two battery packs 10, and the insulating member 20 serves to insulate heat between the adjacent two battery packs 10. And the insulating member 20 surrounds the side of the battery array 11 away from the heat exchange plate 12, so that the pouring sealant is prevented from flowing away from the side of the battery 110 away from the heat exchange plate 12, and the second connection adhesive layer 14 is formed. The insulating member 20 is made of a heat insulating material, and for example, the material of the insulating member 20 may be fiberglass, asbestos, rock wool, silicate, aerogel blanket, vacuum panel, or the like. Two adjacent cells and heat exchange plates are used as a cell group, two adjacent cell lines 10 are simultaneously cooled by using one heat exchange plate 12, and the temperatures of the two cell lines 10 are relatively uniform. The insulating member 20 has a heat insulating effect to prevent the temperature transition of one of the battery packs 10 from affecting the adjacent battery pack 10.

The battery pack 10 is provided at both sides of the insulating member 20, and the insulating member 20 may have an S-shaped structure. For example, the insulating member 20 may include a plurality of heat insulating units arranged in the arrangement direction of the cells 110. The insulation units are arc-shaped and the centers of the adjacent insulation units are located at different sides of the insulation 20.

The plurality of heat insulating units may include a first heat insulating unit and a second heat insulating unit, which are disposed at intervals. The center of the first heat insulation unit faces the first battery pack, the center of the second heat insulation unit faces the second battery pack, and the first battery pack and the second battery pack are two adjacent battery packs 10.

The box 30 includes a bottom plate 31 and a plurality of structural beams 32, and the plurality of structural beams 32 are disposed in the box 30 to form at least one battery compartment for accommodating the battery pack 10, the battery bracket, and the like. By way of example, the structural beams 32 may be attached to the base plate 31 by welding or glue connection, etc.

The bottom plate 31 may be a flat plate structure, and the bottom plate 31 serves to support the battery bracket. And a gas exhaust passage for guiding out gas and liquid ejected from the battery 110 when the battery 110 is thermally out of control may be formed between the bottom plate 31 and the battery holder. The bottom plate 31 may be a single-layer structure, or the bottom plate 31 may be a multi-layer structure, and when the bottom plate 31 is a multi-layer structure, a cavity is provided between the multi-layer bottom plates 31.

The base plate 31 is provided with a plurality of structural beams 32, and the plurality of structural beams 32 form one or more battery compartments on the base plate 31. The plurality of structural beams 32 may include edge beams that enclose a frame and intermediate beams that are disposed within the frame to separate the frame into a plurality of battery compartments.

It should be noted that, in the embodiment of the present disclosure, the bottom plate 31 may be a plate for supporting the battery 110, or the bottom plate 31 may be a bottom plate, or the heat exchange plate 12 disposed at the bottom of the case 30, etc., which is not particularly limited in the embodiment of the present disclosure.

A battery bracket is provided between the bottom plate 31 and the battery pack 10, the battery bracket being for mounting the battery 110. For example, the side of the battery bracket away from the bottom plate 31 is provided with a receiving recess in which the battery 110 is disposed. The receiving recess on the battery bracket may have a circular shape or an approximately circular shape, and the receiving recess corresponds to the battery 110 one by one.

Wherein, a through hole may be provided at the bottom of the receiving recess, and an explosion-proof valve is provided at the bottom of the battery 110. The orthographic projection of the explosion-proof valve on the battery bracket is at least partially overlapped with the through hole at the bottom of the accommodating recess, so that the gas and the liquid sprayed out of the battery 110 are led out through the through hole after the explosion-proof valve of the battery 110 is exploded.

The second connection glue layer 14 is formed by potting adhesive, and thus the bottom surface of the second connection glue layer 14 is connected to the battery bracket. In some embodiments, there is a gap between the bottom surface of the first connection glue layer 13 and the top surface of the battery carrier, and the potting adhesive flows at least partially between the battery carrier and the first connection glue layer 13.

The pouring sealant can be foaming glue, for example, the pouring sealant can be PU foaming glue or polyurethane foaming glue, etc., and of course, the pouring sealant can also be non-foaming glue in practical application, and the embodiment of the disclosure is not limited to this.

In order to verify the connection stability of the battery device in the embodiments of the present disclosure, test subjects were mounted on a vibration table according to the requirements of the test corresponding to the vehicle mounting position and GB/T2423.43, and tested with reference to GB/T2423.56. The connection stability of the battery device is obtained by vibration test when the bonding strength between the battery 110 and the heat exchange plate 12 is 2-7 Mpa and the bonding strength between the battery and the battery is 0.5-4 Mpa.

The test results of different adhesive strengths are shown in examples 1, 2, 3 and comparative examples shown in table 1. The bonding strength between the battery and the heat exchange plate can be specifically adjusted by adjusting the type, thickness and the like of the first connecting adhesive layer; the bonding strength between the batteries can be specifically adjusted by the type of pouring sealant, the thickness of the pouring sealant and the like.

TABLE 1

Based on the test results shown in Table 1, when the bonding strength between the cells 110 and the heat exchange plate 12 is 2-7 MPa and the bonding strength between the cells is 0.5-4 MPa, and the bonding strength between the cells 110 and the heat exchange plate 12 is greater than the bonding strength between the cells, the connection stability of the heat exchange plate 12 can be ensured. In the comparative example, when the bonding strength between the cells 110 and the heat exchange plate 12 was 2Mpa and the bonding strength between the cells was 4Mpa, the connection stability of the heat exchange plate was poor.

The method for measuring the adhesive strength between the battery and the heat exchange plate (the adhesive strength is characterized by the tensile strength between the battery and the heat exchange plate) is as follows:

the shear tensile test is carried out according to GB/T7124-2008 adhesive tensile shear strength measurement (rigid material to rigid material) by referring to national standard, and the specific steps comprise: cutting a steel shell (a first connecting area of the battery) with a preset area and a heat exchange aluminum plate, and testing a sample piece by using a tensile testing machine according to the sequence of the steel shell, the first connecting adhesive layer and the heat exchange aluminum plate.

The bond strength between cells (cell-to-cell bond strength is characterized by cell-to-cell tensile strength) was tested as follows:

the shear tensile test is carried out according to GB/T7124-2008 adhesive tensile shear strength measurement (rigid material to rigid material) by referring to national standard, and the specific steps comprise: and cutting a steel shell (a second connecting area of the battery) with a certain area, and testing the sample piece by using a tensile testing machine according to the sequence of the steel shell, the second connecting adhesive layer and the steel shell.

The battery device provided by the embodiment of the disclosure includes a battery pack 10, a heat exchange plate 12 is arranged at the side part of the battery in the battery pack 10, a first connection area on the battery 110 is provided with a first connection adhesive layer 13, a second connection area is provided with a second connection adhesive layer 14, the first connection adhesive layer 13 is connected with the battery 110 and the heat exchange plate 12, the second connection adhesive layer 14 is connected with the adjacent battery 110, the bonding strength between the battery 110 and the heat exchange plate 12 is greater than that between the battery and the battery, the connection stability of the battery 110 and the heat exchange plate 12 is improved, the problem that the battery 110 and the heat exchange plate 12 fall off due to vibration is avoided, and the failure rate of the battery device is reduced to at least a certain extent.

The device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery device is used for the electric vehicle, the battery device can be a battery pack, and the battery pack is installed on the electric vehicle and provides energy for the electric vehicle.

In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A battery device, characterized in that the battery device comprises:

the battery pack comprises two rows of batteries and a heat exchange plate, wherein the heat exchange plate is arranged between the two rows of batteries, the batteries are provided with a first connecting area and a second connecting area, the first connecting area is provided with a first connecting adhesive layer, the second connecting area is provided with a second connecting adhesive layer, the first connecting adhesive layer is connected with the batteries and the heat exchange plate, and the second connecting adhesive layer is connected with the adjacent batteries;

2. The battery device of claim 1, wherein the battery device further comprises:

and the insulating piece is arranged between the two adjacent battery packs and is used for realizing insulation between the two adjacent battery packs.

3. The battery device according to claim 1, wherein the bonding strength between the battery and the heat exchange plate is 2Mpa to 7Mpa, and the bonding strength between the battery and the battery is 0.5Mpa to 4Mpa.

4. The battery device of claim 1, wherein the first connection glue layer is a double sided glue layer or a heat conductive structural glue layer.

5. The battery device of claim 4, wherein the second bond paste is a potting paste.

6. The battery device according to claim 1, wherein a dimension of an orthographic projection of the first connection region on a reference plane in the battery arrangement direction is smaller than a dimension of the battery in the battery arrangement direction, the reference plane being parallel to the battery arrangement direction and perpendicular to a bottom surface of the battery.

7. The battery device of claim 1, wherein the first bond ply and the second bond ply meet.

8. The battery device according to any one of claims 1-7, wherein the batteries connected by the second connection glue layer are two adjacent batteries in one row of batteries, or the batteries connected by the second connection glue layer are two batteries in two rows of batteries respectively.

9. The battery device of any one of claims 1-7, wherein the battery is a cylindrical battery.

10. The battery device according to claim 9, wherein a plurality of bending parts are provided on the heat exchange plate, the battery and the bending parts are in one-to-one correspondence, and a part where the battery and the bending parts are connected is the first connection region.