CN219329311U

CN219329311U - Battery device

Info

Publication number: CN219329311U
Application number: CN202223469078.7U
Authority: CN
Inventors: 刘国峰; 蒋昕玮; 陈华
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-07-11
Anticipated expiration: 2032-12-23

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device, which comprises a battery and a heat exchange plate, wherein an electric core is arranged in the battery; the height of the contact part is smaller than that of the battery cell. Through the structural design, the upper end and the lower end of the battery cell can generate heat exchange with the outside through the top surface and the bottom surface of the battery, and heat exchange can not be generated through direct contact between the side surface of the battery and the heat exchange plate, so that the heat exchange rate of the upper part and the lower part of the battery cell is more balanced than that of the middle part of the battery cell, and the heat consistency of the battery is improved.

Description

Battery device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack device.

Background

In the existing design scheme of the battery pack, the upper part and the lower part of the battery core of the battery respectively generate heat exchange with the outside through the top surface and the bottom surface of the battery, and meanwhile, the side surface of the battery is provided with a liquid cooling plate, so that the heat exchange rate of the upper part and the lower part of the battery core is higher than that of the middle part of the battery core, and the heat consistency of the battery core is affected.

Disclosure of Invention

It is a primary object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a battery device with improved heat uniformity of the battery.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, there is provided a battery device, including a battery and a heat exchange plate, wherein the battery has a battery core therein, the heat exchange plate is disposed on a side surface of the battery, the heat exchange plate includes a contact portion and two bending portions, the two bending portions are respectively connected to upper and lower ends of the contact portion, the contact portion is attached to the side surface of the battery, and a gap is formed between the bending portions and the side surface of the battery; the height of the contact part is smaller than that of the battery cell.

As can be seen from the above technical solutions, the battery device provided by the present utility model has the following advantages and positive effects:

the battery device comprises a battery and a heat exchange plate, wherein the heat exchange plate is arranged on the side face of the battery, the heat exchange plate comprises a contact part attached to the side face of the battery, and the height of the contact part is smaller than that of a battery core of the battery. Through the structural design, the upper end and the lower end of the battery cell can be prevented from being covered by the area where the heat exchange plate is attached to the side face of the battery in the height direction, so that the upper end and the lower end of the battery cell can not generate heat exchange through direct contact between the side face of the battery and the heat exchange plate except heat exchange with the outside through the top face and the bottom face of the battery, and accordingly the heat exchange rate of the upper part and the lower part of the battery cell is more balanced than that of the middle part of the battery cell, and the heat consistency of the battery is improved.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is an exploded perspective view showing a partial structure of a battery device according to an exemplary embodiment;

fig. 2 is a partially enlarged schematic view of a part of the structure of the battery device shown in fig. 1;

fig. 3 and 4 are partial enlarged schematic views of part of structures of a battery device according to other two exemplary embodiments, respectively;

fig. 5 is a schematic perspective view of a battery device according to another exemplary embodiment;

fig. 6 is a schematic perspective view of a part of the structure of the battery device shown in fig. 5.

The reference numerals are explained as follows:

100. a battery;

110. a battery cell;

111. a tab;

120. a pole;

130. a busbar;

140. a glue layer;

200. a heat exchange plate;

210. a contact portion;

220. a bending part;

300. a mounting plate;

H1. height of the steel plate;

H2. height of the steel plate;

h. a height difference;

h1. a first height difference;

h2. a second height difference;

s1, a first surface;

x, a first direction;

y. second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1 and 2, an exploded perspective view of a part of the structure of a battery device according to the present utility model is representatively illustrated in fig. 1; fig. 2 representatively shows an enlarged partial schematic view of the structure of a portion of the battery device shown in fig. 1, in which a side view structure of one battery 100 and one heat exchange plate 200 in the battery device is specifically shown. In this exemplary embodiment, the battery device according to the present utility model is described as being applied to a vehicle-mounted battery, and it should be noted that the battery device may be a battery module or a battery pack, the battery module includes a plurality of batteries 100 (for example, arranged along the first direction X), and the battery module may further include an end plate and a side plate, where the end plate and the side plate are used to fix the plurality of batteries 100.

It should be noted that, the plurality of batteries 100 may be disposed in the battery case after forming the battery module, and the plurality of batteries 100 may be fixed by the end plate and the side plate. The plurality of cells 100 may be disposed directly in the cell case, i.e., without grouping the plurality of cells 100, at which time the end plates and the side plates may be removed. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below for use in other types of battery devices, which remain within the principles of the battery set forth herein.

As shown in fig. 1, in an embodiment of the present utility model, a battery device according to the present utility model includes a battery 100 and a heat exchange plate 200. The battery 100 has a battery cell 110 therein, and the battery cell 110 is disposed inside a housing of the battery 100, for example, the battery cell 100 is disposed at a bottom of the housing. The heat exchange plate 200 is disposed at the side of the battery 100, i.e., at other surfaces of the battery 100 than the top and bottom surfaces. The heat exchange plate 200 includes a contact portion 210 and two bending portions 220, and the two bending portions 220 are respectively connected to upper and lower ends of the contact portion 210. Wherein the contact 210 is attached to the side of the battery 100. The bent portion 220 has a gap with the side of the battery 100 without contact. On this basis, the height H1 of the contact 210 is smaller than the height H2 of the cell 110. It should be noted that, the battery cell 110 further includes a tab 111, and the tab 111 is used to connect with the post 120 of the battery 100, and the height H2 of the battery cell 110 refers to the height of the body of the battery cell 110, i.e. the height of the tab 111 is not included.

Through the above structural design, the utility model can avoid that the area where the heat exchange plate 200 is attached to the side surface of the battery 100 covers the upper end and the lower end of the battery cell 110 in the height direction, so that the upper end and the lower end of the battery cell 110 can not generate heat exchange with the outside through the direct contact between the side surface of the battery 100 and the heat exchange plate 200 except the heat exchange through the top surface and the bottom surface of the battery 100, thereby enabling the heat exchange rate of the upper part and the lower part of the battery cell 110 to be more balanced than that of the middle part of the battery cell, and improving the heat consistency of the battery 100.

Specifically, in the existing design scheme of the battery pack, taking the form of "large-surface heat exchange" as an example, the pole of the battery can be arranged at the top or bottom of the battery with high probability (the pole can cause high connection difficulty of the busbar when arranged at the side of the battery and can interfere with the heat exchange plate arranged at the side of the battery). Accordingly, as can be seen from fig. 2, the tab 111 of the battery cell 110 is led out and then connected with the pole 120, so as to exchange heat with the outside, while the battery cell 110 is not suspended in the housing of the battery 100, but is located at the bottom of the housing, so that the bottom of the battery cell 110 also exchanges heat with the outside, the periphery of the battery cell needs to be controlled in terms of tightness when being plugged into the housing of the battery 100, and as can be seen from fig. 2, the battery cell 110 is not plugged into the housing of the battery 100, but has a certain redundancy, and a certain expansion space is reserved for the subsequent operation by controlling the tightness, so that the heat exchanged between the periphery of the battery cell 110 and the outside is not more than the top and the bottom, and the relative relation between the height H1 of the contact portion 210 of the heat exchange plate 200 and the upper end and the lower end of the battery cell 110 (i.e. the height H2 of the battery cell 110) is specially designed, so that the technical problems can be solved in a targeted manner.

Note that, the battery 100 described in this specification specifically includes the cell 110 and an electrolyte, and the "battery 100" refers to a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack portion, and the stack portion may include a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode are interchangeable.

As shown in fig. 2, in an embodiment of the present utility model, the cross-sectional width of the bending portion 220 decreases gradually in a direction away from the contact portion 210, such as, but not limited to, an arc-shaped bending shape (a triangle or trapezoid bending shape is also possible) as shown, so that the bending portion 220 has a gap with the side surface of the battery 100 without contacting. In some embodiments, the cross-section of the bending portion 220 may have other shapes, which only needs to ensure that the bending portion 220 is not in contact with the side surface of the battery 100.

As shown in fig. 2, in an embodiment of the present utility model, the upper end of the contact 210 may not exceed the upper end of the battery cell 110, and the lower end of the contact 210 may not exceed the lower end of the battery cell 110. Through the above structural design, due to the structural design that the height H1 of the contact portion 210 is smaller than the height H2 of the battery cell 110, the present utility model can make the contact area between the heat exchange plate 200 and the side surface of the battery 100 not cover the upper and lower ends of the battery cell 110, thereby ensuring that the upper and lower ends of the battery cell 110 reduce heat exchange via the heat exchange plate 200, and accordingly further improving heat consistency of the battery 100. In some embodiments, on the basis that the height H1 of the contact portion 210 is smaller than the height H2 of the battery cell 110, the upper end of the contact portion 210 may be higher than the upper end of the battery cell 110, or the lower end of the contact portion 210 may be lower than the lower end of the battery cell 110 according to different design requirements, which is not limited in this embodiment.

As shown in fig. 2, based on the structural design that the upper end of the contact 210 does not exceed the upper end of the battery cell 110 and the lower end of the contact 210 does not exceed the lower end of the battery cell 110, in an embodiment of the present utility model, the upper end of the battery 100 is provided with the post 120, and the lower end of the battery 100 may be used to connect the mounting plate 300. On this basis, a first height difference h1 is formed between the upper end of the contact portion 210 and the upper end of the battery cell 110, and a second height difference h2 is formed between the lower end of the contact portion 210 and the lower end of the battery cell 110, wherein the first height difference h1 is smaller than the second height difference h2. Through the above structural design, since the end of the battery 100 provided with the pole 120 needs to be connected with the busbar 130, a certain safety gap needs to be left between the end of the battery 100 and the box body of the battery pack, the heat exchange is relatively less, and the other end of the battery 100 connected with the mounting plate 300 can exchange heat with the outside through the mounting plate 300, so that the height difference corresponding to the end of the battery 100 with less heat exchange is smaller, and the height difference corresponding to the end of the battery 100 with more heat exchange is larger, thereby further adapting to the actual structure of the battery 100 and further improving the heat consistency of the battery 100.

It should be noted that, in some embodiments, the post 120 of the battery 100 may also be disposed at the lower end of the battery 100, and the first height difference h1 may be greater than the second height difference h2. In other words, in various possible embodiments according to the design concept of the present utility model, when one of the upper and lower ends of the battery 100 is provided with the terminal 120, one of the upper and lower ends of the contact 210, which is close to the terminal 120, has a first height difference h1 with one of the upper and lower ends of the battery cell 110, which is close to the terminal 120, and the other of the upper and lower ends of the contact 210, which is close to the other of the upper and lower ends of the battery cell 110, has a second height difference h2 with the first height difference h1 being smaller than the second height difference h2.

Referring to fig. 3, there is representatively illustrated a partially enlarged schematic view of a portion of the structure of a battery device capable of embodying the principles of the present utility model in another exemplary embodiment, in which the side view structure of one battery 100 and one heat exchange plate 200 of the battery device is specifically illustrated.

As shown in fig. 3, the first height difference h1 may be larger than the second height difference h2 according to different design requirements of the battery device.

As shown in fig. 2 or 3, based on the structural design that the upper and lower ends of the contact portion 210 and the upper and lower ends of the battery cell 110 have the first height difference H1 and the second height difference H2 that are not equal, respectively, in an embodiment of the present utility model, the ratio of the first height difference H1 in the height H2 of the battery cell 110 may be 0.013 to 0.2, for example, 0.013, 0.05, 0.1, 0.2, and the like. Through the above structural design, the present utility model can avoid the insufficient effect of improving the heat uniformity of the battery 100 due to the too small ratio of the first height difference H1, and can also avoid the further influence on the heat exchange function of the heat exchange plate 200 due to the too small ratio of the first height difference H1 and the too small height H1 of the contact portion 210. In some embodiments, the ratio of the first height difference H1 in the height H2 of the battery cell 110 may be 0.013, or may be greater than 0.2, for example, 0.012, 0.21, etc., but it is necessary to ensure that the first height difference H1 and the second height difference H2 are not equal, which is not limited to the embodiment.

Further, based on the structural design that the ratio of the first height difference H1 to the height H2 of the battery cell 110 is 0.013 to 0.2, in an embodiment of the present utility model, the ratio of the first height difference H1 to the height H2 of the battery cell 110 may be preferably 0.015 to 0.15.

As shown in fig. 2 or 3, based on the structural design that the upper and lower ends of the contact portion 210 and the upper and lower ends of the battery cell 110 have the first height difference H1 and the second height difference H2 that are not equal, respectively, in an embodiment of the present utility model, the ratio of the second height difference H2 in the height H2 of the battery cell 110 may be 0.013 to 0.2, for example, 0.013, 0.05, 0.1, 0.2, and the like. Through the above structural design, the present utility model can avoid the insufficient effect of improving the heat uniformity of the battery 100 due to the too small ratio of the second height difference H2, and can also avoid the further influence on the heat exchange function of the heat exchange plate 200 due to the too small ratio of the second height difference H2 and the too small height H1 of the contact portion 210. In some embodiments, the ratio of the second height difference H2 in the height H2 of the battery cell 110 may be 0.013, or may be greater than 0.2, for example, 0.012, 0.21, etc., but it is necessary to ensure that the first height difference H1 and the second height difference H2 are not equal, which is not limited to the embodiment.

Further, based on the structural design that the ratio of the second height difference H2 in the height H2 of the battery cell 110 is 0.013 to 0.2, in an embodiment of the present utility model, the ratio of the second height difference H2 in the height H2 of the battery cell 110 may be preferably 0.015 to 0.15.

In view of the foregoing, table 1 below illustrates the design parameters and corresponding efficacy parameters of various embodiments for a more complete understanding of the design and efficacy of the present utility model. Wherein, the value of the "H1" column represents the first height difference H1 in mm, the value of the "H2" column represents the second height difference H2 in mm, the value of the "H2" column represents the height H2 of the cell 110 in mm, the value of the "H1/H2" column represents the ratio of the first height difference H1 to the height H2 of the cell 110, and the value of the "H2/H2" column represents the ratio of the second height difference H2 to the height H2 of the cell 110. On this basis, the following table 1 selects the "temperature difference between different parts of the battery 100" (abbreviated as "temperature difference" in the table) as the efficacy parameter for embodying the heat consistency of the battery 100, and the unit is ℃.

TABLE 1

Based on the structural design that the upper and lower ends of the contact portion 210 and the upper and lower ends of the battery cell 110 have the first height difference h1 and the second height difference h2, respectively, which are not equal, in an embodiment of the present utility model, the product of the capacity of the battery 100 and the first height difference h1 may be 160ah·mm to 5400ah·mm, for example 160ah·mm, 1000ah·mm, 2500ah·mm, 5400ah·mm, or the like. The utility model sets the first height difference h1 in a reasonable range, takes the product of the first height difference h1 and the capacity of the battery 100 as a parameter standard, and can ensure that the heat exchange plate 200 can fully dissipate heat of the battery 100 because the larger the capacity of the battery 100 is, the more the battery 100 generates heat. In some embodiments, the product of the capacity of the battery 100 and the first height difference h1 may be also less than 160ah·mm, or may be greater than 5400ah·mm, such as 159ah·mm, 5410ah·mm, etc., without being limited to this embodiment.

Based on the structural design that the upper and lower ends of the contact portion 210 and the upper and lower ends of the battery cell 110 have the second height difference h2 and the second height difference h2, respectively, the product of the capacity of the battery 100 and the second height difference h2 may be 160ah·mm to 5400ah·mm, for example 160ah·mm, 1000ah·mm, 2500ah·mm, 5400ah·mm, or the like in an embodiment of the present utility model. The utility model sets the second height difference h2 within a reasonable range as the battery 100 generates more heat as the battery 100 has larger capacity, and takes the product of the second height difference h2 and the capacity of the battery 100 as a parameter standard, thereby ensuring that the heat exchange plate 200 can fully dissipate heat of the battery 100. In some embodiments, the product of the capacity of battery 100 and second height difference h2 may be also less than 160ah·mm, or may be greater than 5400ah·mm, such as 159ah·mm, 5410ah·mm, etc., without being limited to this embodiment.

In addition, when the first height difference h1 and the second height difference h2 are not equal, the product of the first height difference h1 and the capacity of the battery 100 is also not equal to the product of the second height difference h2 and the capacity of the battery 100.

In view of the foregoing, table 2 below illustrates the relevant design parameters and corresponding efficacy parameters of various embodiments for a more complete understanding of the design and efficacy of the present utility model. The value of the "h1" column represents the first height difference h1 in mm, the value of the "h2" column represents the second height difference h2 in mm, the value of the "C" column represents the capacity of the battery 100 in Ah, the value of the "h1·c" column represents the product of the first height difference h1 and the capacity of the battery 100 in ah·mm, and the value of the "h2·c" column represents the product of the second height difference h2 and the capacity of the battery 100 in ah·mm. On this basis, the following table 2 selects "temperature differences of different parts of the battery 100" (in short, "temperature differences" in the table) as efficacy parameters for embodying the heat consistency of the battery 100 in units of ℃.

	h1	h2	C	h1·C	h2·C	Temperature difference
							Example 17	2	5	80	160	400	0.2
Example 18	5	6	196	980	1176	0.38
							Example 19	6	8	196	1176	1568	0.45
Example 20	8	10	196	1568	1960	0.48
							Example 21	18	17	300	5400	5100	0.57
Example 22	4	5	196	784	980	0.35
							Example 23	4	6	196	784	1176	0.35
Example 24	4	8	196	784	1568	0.4
							Example 25	10	18	300	3000	5400	0.5
Comparative example 2	20	19	300	6000	5700	0.7

TABLE 2

Referring to fig. 4, a schematic structural view of a portion of a battery pack capable of embodying the principles of the present utility model in another exemplary embodiment is representatively illustrated in fig. 4, in which a side view structure of one battery 100 and one heat exchange plate 200 in a battery device is specifically illustrated.

As shown in fig. 4, in an embodiment of the present utility model, the first height difference h1 and the second height difference h2 may be equal, in other words, the height difference h between the upper end of the contact portion 210 and the upper end of the cell 110 is equal to the height difference h between the lower end of the contact portion 210 and the lower end of the cell 110, unlike the structural design in the embodiment shown in fig. 2, in which the first height difference h1 and the second height difference h2 are not equal.

Based on the structural design that the height difference H between the contact portion 210 and the upper and lower ends of the cell 110 is equal, in some embodiments, the ratio of the height difference H in the height H2 of the cell 110 may be 0.013 to 0.2.

In view of the foregoing, table 3 below illustrates the relevant design parameters and corresponding efficacy parameters of various embodiments for a more complete understanding of the design and efficacy of the present utility model. The value of the "H" column represents the height difference H in mm, the value of the "H2" column represents the height H2 of the cell 110 in mm, and the value of the "H/H2" column represents the ratio of the height difference H to the height H2 of the cell 110. On this basis, the following table 3 selects the "temperature difference between different parts of the battery 100" (abbreviated as "temperature difference" in the table) as the efficacy parameter for embodying the heat consistency of the battery 100, and the unit is ℃.

TABLE 3 Table 3

Based on the structural design that the height difference h between the contact 210 and the upper and lower ends of the battery cell 110 is equal, the product of the capacity of the battery 100 and the height difference h may be 160ah·mm to 5400ah·mm in some embodiments.

In view of the foregoing, table 4 below illustrates the relevant design parameters and corresponding efficacy parameters of various embodiments for a more complete understanding of the design and efficacy of the present utility model. The "h" column represents the height difference h in mm, the "C" column represents the capacity of the battery 100 in Ah, and the "h·c" column represents the product of the height difference h and the capacity of the battery 100 in ah·mm. On this basis, the following table 4 selects the "temperature difference between different parts of the battery 100" (abbreviated as "temperature difference" in the table) as the efficacy parameter for embodying the heat consistency of the battery 100, and the unit is ℃.

	h	C	h·C	Temperature difference
					Example 33	2	80	160	0.2
Example 34	5	154	770	0.35
					Example 35	6	196	1176	0.4
Example 36	18	300	5400	0.55
					Comparative example 4	19	300	5700	0.57

TABLE 4 Table 4

In the above examples 1 to 16, 26 to 32 and comparative examples 1 and 3, the method for measuring the temperature difference at different portions of the battery 100 may include: the coolant flow rate of the heat exchange plate 200 was set to 3L/min and the inlet temperature was set to 65 ℃. The liquid cooling filling equipment is started, and the thermocouple temperature of each part of the battery cell 110 is monitored and recorded. After the temperature of the battery cell 110 is stable, the liquid cooling filling equipment is closed. The maximum thermocouple temperature difference after the cell 110 temperature is stable is calculated.

In examples 17 to 25, 33 to 36 and comparative examples 2 and 4, the method for measuring the temperature difference between different portions of the battery 100 may include: the coolant flow rate of the heat exchange plate 200 was set to 3L/min and the inlet temperature was set to 20 ℃. Charging is carried out by 1C, meanwhile, the liquid cooling charging equipment is started, and the thermocouple temperature of each part of the battery cell 110 is monitored and recorded. After charging to the end condition, the liquid cooling charging device is turned off. The thermocouple maximum temperature difference at the end of the charging of the battery cell 110 is calculated.

As shown in fig. 2, in an embodiment of the present utility model, the thickness of the bent portion 220 of the heat exchange plate 200 may decrease in a direction facing away from the contact portion 210, and accordingly, the cross section of the heat exchange plate 200 may be, for example, but not limited to, circular arc, elliptical arc, other arc, trapezoid, etc. The thickness of the bending portion 220 refers to the entire thickness of the bending portion 220 in the first direction X, and is not the wall thickness of the bending portion 220.

As shown in fig. 2 to 4, in an embodiment of the present utility model, the battery 100 may be connected to the mounting plate 300 via the adhesive layer 140.

As shown in fig. 1, in an embodiment of the present utility model, the side surface of the battery 100 may be a first surface S1 of the battery 100, and the surface area of the first surface S1 is greater than the surface area of any other surface of the battery 100. On this basis, the heat exchange plate 200 is disposed on the first surface S1 of the battery 100, that is, the battery 100 adopts a heat exchange scheme of "large-surface heat exchange".

Based on the structural design that the battery device comprises a plurality of batteries, in one embodiment of the present utility model, the batteries may have a top surface, a bottom surface, and two first side surfaces and two second side surfaces disposed between the top surface and the bottom surface, where the two first side surfaces are oppositely disposed, and the two second side surfaces are oppositely disposed, and the first side surface is the first surface S1.

Referring to fig. 5 and 6, a schematic perspective view of a battery device capable of embodying the principles of the present utility model in another exemplary embodiment is representatively illustrated in fig. 5; an enlarged schematic view of a part of the structure in fig. 5 is representatively illustrated in fig. 6.

As shown in fig. 5 and 6, in an embodiment of the present utility model, the battery device according to the present utility model may include a plurality of battery cells arranged in a first direction X, and each battery cell includes a plurality of batteries 100 arranged in a second direction Y, which is perpendicular to the first direction X, and the second direction Y may be, for example, a length direction of the heat exchange plate 200 shown in the drawings. On the basis of this, a heat exchange plate 200 is disposed between two adjacent battery cells, that is, one heat exchange plate 200 is attached to the first surfaces S1 of the plurality of batteries 100 arranged in the second direction Y.

It should be noted herein that the battery devices shown in the drawings and described in this specification are only a few examples of the wide variety of battery devices that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery device shown in the drawings or described in this specification.

In summary, the battery device according to the present utility model includes the battery 100 and the heat exchange plate 200, wherein the heat exchange plate 200 is disposed on the side surface of the battery 100, the heat exchange plate 200 includes a contact portion 210 attached to the side surface of the battery 100, and the height of the contact portion 210 is smaller than the height of the battery cell 110 of the battery 100. Through the above structural design, the utility model can avoid that the area where the heat exchange plate 200 is attached to the side surface of the battery 100 covers the upper end and the lower end of the battery cell 110 in the height direction, so that the upper end and the lower end of the battery cell 110 can not generate heat exchange with the outside through the direct contact between the side surface of the battery 100 and the heat exchange plate 200 except the heat exchange through the top surface and the bottom surface of the battery 100, thereby enabling the heat exchange rate of the upper part and the lower part of the battery cell 110 to be more balanced than that of the middle part of the battery cell, and improving the heat consistency of the battery 100.

Exemplary embodiments of the battery device proposed by the present utility model are described and/or illustrated in detail above. Embodiments of the utility model are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the utility model has been described in terms of various specific embodiments, those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the claims.

Claims

1. The battery device is characterized by comprising a battery and a heat exchange plate, wherein a battery core is arranged in the battery, the heat exchange plate is arranged on the side surface of the battery, the heat exchange plate comprises a contact part and two bending parts, the two bending parts are respectively connected to the upper end and the lower end of the contact part, the contact part is attached to the side surface of the battery, and a gap is reserved between the bending parts and the side surface of the battery; the height of the contact part is smaller than that of the battery cell.

2. The battery device of claim 1, wherein an upper end of the contact does not exceed an upper end of the cell and a lower end of the contact does not exceed a lower end of the cell.

3. The battery device according to claim 2, wherein one of upper and lower ends of the battery is provided with a post; wherein, one of the upper and lower ends of the contact part, which is close to the polar post, and one of the upper and lower ends of the battery core, which is close to the polar post, have a first height difference, the other of the upper end and the lower end of the contact part and the other of the upper end and the lower end of the battery cell are provided with a second height difference, and the first height difference is smaller than the second height difference.

4. The battery device according to claim 2, wherein one of upper and lower ends of the battery is provided with a post; wherein, one of the upper and lower ends of the contact part, which is close to the polar post, and one of the upper and lower ends of the battery core, which is close to the polar post, have a first height difference, the other of the upper end and the lower end of the contact part and the other of the upper end and the lower end of the battery cell are provided with a second height difference, and the first height difference is larger than the second height difference.

5. The battery device according to claim 3 or 4, characterized in that:

the ratio of the first height difference in the height of the battery cell is 0.013-0.2; and/or

The second height difference has a duty ratio of 0.013-0.2 in the height of the battery cell.

6. The battery device according to claim 3 or 4, characterized in that:

the product of the capacity of the battery and the first height difference is 160 Ah.mm-5400 Ah.mm; and/or

The product of the capacity of the battery and the second height difference is 160 Ah.mm to 5400 Ah.mm.

7. The battery device according to claim 2, wherein a height difference between an upper end of the contact portion and an upper end of the battery cell is equal to a height difference between a lower end of the contact portion and a lower end of the battery cell.

8. The battery device according to claim 7, wherein the height difference has a ratio of 0.013 to 0.2 in the height of the battery cell.

9. The battery device according to claim 7, wherein a product of a capacity of the battery and the height difference is 160 Ah-mm to 5400 Ah-mm.

10. The battery device according to any one of claims 1 to 4 and 7 to 9, wherein the thickness of the bent portion decreases in a direction away from the contact portion.

11. The battery device according to any one of claims 1 to 4 and 7 to 9, wherein a side surface of the battery is a first surface of the battery, a surface area of the first surface is larger than a surface area of any other surface of the battery, and the heat exchange plate is provided on the first surface.