End plate, battery module and stacked battery

Abstract

The utility model discloses an end plate, a battery module and a stacked battery module, the end plate comprises a plate body, the plate body is provided with a first fixing part along the height direction of the plate body, one side of the plate body is provided with a fastening part, the other side of the plate body is provided with a positioning part, and the plate body is provided with a second fixing part along the width direction of the plate body; the first fixing part is used for fixing the plate body to the box body in the height direction of the plate body, the second fixing part is used for fixing the plate body to the box body in the width direction of the plate body, the positioning part is used for positioning the supporting body, and the fastening part is used for stacking and fixing the previous plate body and the next plate body. The end plate can be applied to different installation occasions, and meanwhile, the end plate is matched with the supporting body to be used, so that the battery modules can be stacked to form a stacked battery, and the installation space is saved.

Description

Technical Field

[0001] The present application relates to the technical field of end plates, and in particular to an end plate, a battery module and a stacked battery. Background Art

[0002] A battery module is usually formed by connecting multiple battery cells in series and in parallel. The multiple battery cells are arranged in sequence, and end plates are provided at both ends of the arrangement direction to fasten the multiple battery cells through the end plates. The fastened battery module is then placed and fixed in a box.

[0003] However, due to the fact that the connection position between the end plate and the box body is a fixed position, it is difficult to adapt to different installation occasions by changing the fixed position. Utility Model Content

[0004] The present application aims to provide an end plate, a battery module and a stacked battery.

[0005] According to the first aspect of the present application, the present application provides an end plate, comprising: a plate body, wherein the plate body is provided with a first fixing portion along the height direction of the plate body, and a fastening portion is provided on one side of the plate body, a positioning portion is provided on the other side of the plate body, and the plate body is provided with a second fixing portion along the width direction of the plate body; the first fixing portion is used to fix the plate body to the box body along the height direction of the plate body, the second fixing portion is used to fix the plate body to the box body along the width direction of the plate body, the positioning portion is used to position the support body, and the fastening portion is used to stack and fix the upper plate body with the next plate body.

[0006] As a further solution of the end plate provided in the present application, at least one connecting portion is further provided on the plate body, and the two plate bodies can be connected to each other through the connecting portion.

[0007] As a further solution of the end plate provided in the present application, the connection portion is arranged in a positioning groove on the plate body, and the positioning groove is used to position a locking belt used to connect the two plate bodies.

[0008] As a further solution of the end plate provided in the present application, a receiving groove is further provided at the bottom of the plate body along the height direction of the plate body, and the receiving groove is used to receive the heating component.

[0009] As a further solution of the end plate provided in the present application, the first fixing portion is a first blind hole arranged on the plate body along the height direction of the plate body and having a first internal thread section at the bottom, or the first fixing portion is a first through hole arranged on the plate body along the height direction of the plate body.

[0010] As a further solution of the end plate provided in the present application, the second fixing portion is a second blind hole arranged on the plate body along the width direction of the plate body and having a second internal thread section at the bottom, or the second fixing portion is a second threaded hole.

[0011] As a further solution of the end plate provided in the present application, along the thickness direction of the plate body, the plate body is provided with a first protrusion and a second protrusion that protrude outward and are spaced apart from each other, the fastening portion is arranged on the first protrusion, and the positioning portion is arranged on the second protrusion.

[0012] As a further solution of the end plate provided in the present application, the fastening portion is a through hole arranged on the first protruding portion, the positioning portion is arranged on a protrusion of the second protruding portion, and the second protruding portion is further provided with a screw hole passing through the protrusion.

[0013] According to the second aspect of the present application, the present application provides a battery module, comprising: the two end plates described above, and also comprising: a plurality of battery cells arranged in sequence, the two end plates are respectively arranged at the opposite ends of the plurality of battery cells arranged in sequence, and the two end plates are fixedly connected.

[0014] According to the third aspect of the present application, the present application provides a stacked battery, comprising: at least two of the above-mentioned battery modules, and also comprising: a support body, along the height direction of the support body, a positioning groove is provided on one side of the support body facing the positioning portion, and the positioning groove is used to position the positioning portion.

[0015] According to the end plate, battery module and stacked battery of the above embodiment, the plate body is fixed to the top or bottom of the box body by the first fixing part, and the plate body is fixed to the side of the box body by the second fixing part at the same time, or the first fixing part or the second fixing part is used alone to fix the plate body to the box body, so that the end plate can be widely used in different installation occasions. The positioning part is positioned on the support body, and the fastening part can stack and fix the plate body in the upper battery module with the plate body in the next battery module, thereby forming a stacked battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional end plate provided by the utility model Figure 1 ;

[0017] Figure 2 The three-dimensional end plate provided by the utility model Figure 2 ;

[0018] Figure 3 An exploded view of the battery module provided by the utility model;

[0019] Figure 4 A bottom view of the battery module provided by the utility model;

[0020] Figure 5 Schematic diagram of installing the battery module provided by the utility model into the box Figure 1 ;

[0021] Figure 6 Schematic diagram of installing the battery module provided by the utility model into the box Figure 2 ;

[0022] Figure 7 This is an exploded view of the stacked battery provided by the utility model.

[0023] Reference numerals:

[0024] Plate body 10, first fixing portion 11, first through hole 111, first bolt 112, second fixing portion 12, second blind hole 121, second internal thread segment 122, second screw rod 123, second internal thread segment 12, fastening portion 13, positioning portion 14, protrusion 141, connecting portion 15, positioning groove 151, accommodating groove 16, first protruding portion 17, second protruding portion 18, box body 20, first threaded hole 21, through hole 22, locking belt 30, heating assembly 40, support body 50, connecting bolt 51, battery cell 100. DETAILED DESCRIPTION

[0025] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0026] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0027] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0028] The battery module is composed of multiple battery cells and end plates respectively fixed at both ends of the multiple battery cells, and the stacked battery is composed of at least two battery modules stacked in a stacked manner. When assembling the battery module, two end plates are set at both ends of the multiple battery cells and fixed, so that the multiple battery cells are fastened and connected through the end plates, and then the fastened battery module is placed and fixed in the box.

[0029] If the battery module is installed in an area with narrow left and right spaces, the battery module needs to be fixedly connected to the box in the vertical direction. If the battery module is installed in an area with narrow upper and lower spaces, the battery module needs to be fixedly connected to the box in the left and right directions. However, the connection position between the existing end plate and the box is relatively fixed, which is difficult to adapt to different installation occasions.

[0030] See also Figure 1 and Figure 2 As shown, the end plate provided in this embodiment includes: a plate body 10, wherein the plate body 10 is a plate-shaped structure, combined with Figure 3 As shown, when multiple battery cells 100 are fixedly assembled by two end plates, the two end plates are respectively arranged at both ends of the multiple battery cells arranged side by side. It can be understood that the size of the plate body 10 is adapted to the size of the battery cell, that is, the size of the plate body 10 is consistent with the size of the battery cell, or is slightly larger than the size of the battery cell.

[0031] In one embodiment of the present application, the battery cell is generally a square battery cell, that is, a plurality of square battery cells are arranged in sequence, and the plate body 10 is arranged in a manner of being attached to the outer side of the end square battery cell.

[0032] In this embodiment, taking the perspective of the board 10 being attached to the outside of the square battery cell as an example, the width direction, thickness direction, and height direction of the board 10 are respectively Figure 1 and Figure 2 The X-axis direction, Y-axis direction, and Z-axis direction.

[0033] The board body 10 is provided with a first fixing portion 11 along the height direction Z of the board body 10, and is provided with a second fixing portion 12 along the width direction X of the board body 10. In this way, after a plurality of battery cells are assembled and fixed through two end plates and placed in a box, the board body 10 can be fixed to the box along the height direction Z of the board body 10 by the first fixing portion 11, and the board body 10 can be fixed to the box along the width direction X of the board body 10 by the second fixing portion 12.

[0034] Here, it should be noted that the height direction Z of the board body 10 corresponds to the top or bottom of the board body 10, and the width direction of the board body 10 corresponds to the two sides of the board body 10. In this way, the board body 10 can be fixed to the top or bottom of the box along the height direction Z of the board body 10 through the first fixing part 11, and the board body 10 can be fixed to the side of the box along the width direction X of the board body 10 through the second fixing part 12.

[0035] In practical applications, the plate body can be fixed to the top or bottom of the box body by the first fixing part 11, and the plate body can be fixed to the side of the box body by the second fixing part 12 at the same time, or the plate body can be fixed to the box body by the first fixing part or the second fixing part alone, so that the end plate can be widely used in different installation occasions.

[0036] In the present application, along the height direction Z of the plate body 10, a fastening portion 13 is provided on one side of the plate body 10, and a positioning portion 14 is provided on the other side of the plate body 10, wherein one side and the other side of the plate body 10 are respectively opposite sides of the plate body 10 along its height direction Z. When at least two battery modules are stacked to form a stacked battery, a support body needs to be arranged between the plates of two adjacent battery modules. The positioning portion 14 is used to position the support body, and the fastening portion 13 is used to stack and fix the plate body 10 in the upper battery module with the plate body 10 in the next battery module, thereby forming a stacked battery.

[0037] In this embodiment, the first fixing portion 11 is a first blind hole arranged on the plate body 10 along the height direction of the plate body 10 and having a first internal thread section at the bottom, or the first fixing portion 11 is a first through hole 111 arranged on the plate body 10 along the height direction of the plate body 10.

[0038] Specifically, when the first fixing portion 11 is a first blind hole arranged on the plate body 10 along the height direction of the plate body 10 and having a first internal thread segment at the bottom, when the battery module is installed in the box body, a first through hole can be arranged at the corresponding position of the box body, so that the first through hole is coaxial or aligned with the first blind hole, and the first screw is passed through the first through hole, the first blind hole and screwed on the first internal thread segment, so that the battery module can be fixed in the box body in the height direction.

[0039] In this embodiment, the first fixing portion 11 is taken as the first through hole 111 for example. Figure 5 As shown, the first fixing portion 11 is a first through hole 111 arranged on the plate body 10 along the height direction of the plate body 10, and a first threaded hole 21 is arranged at the bottom of the box body 20. After the battery module is placed in the box body 20, the first bolt 112 passes through the first through hole 111 and is screwed into the first threaded hole 21, so that the battery module and the box body 20 can be fixed along the height direction Z of the plate body 10.

[0040] In this embodiment, the second fixing portion 12 is a second blind hole 121 disposed on the plate body 10 along the width direction of the plate body 10 and having a second internal thread section 122 at the bottom, or the second fixing portion 12 is a second threaded hole.

[0041] When the second fixing portion 12 is a second threaded hole, when the battery module is installed in the box, a second through hole can be set at the corresponding position of the box, so that the second through hole is coaxial or aligned with the second threaded hole, and the second screw is passed through the second through hole and screwed into the second threaded hole, so that the battery module can be fixed in the box 20 in the width direction.

[0042] In the present application, the second fixing portion 12 is taken as the second blind hole 121 as an example for explanation. Figure 6 As shown, the second fixing portion 12 is a second blind hole 121 arranged on the plate body 10 along the width direction of the plate body 10 and having a second internal thread segment 122 at the bottom. A through hole 22 is arranged at the corresponding position of the box body 20. The second screw 123 passes through the through hole 22 and is screwed to the second internal thread segment of the second blind hole 121, so that the battery module and the box body 20 can be fixed along the width direction X of the plate body 10.

[0043] After the two plates 10 are respectively disposed at both ends of the plurality of battery cells 100 , the two plates 10 need to be fixed. In a specific embodiment, at least one connecting portion 15 is further disposed on the plate 10 , and the two plates 10 can be connected to each other through the connecting portion 15 , so that a battery module can be formed.

[0044] In a specific embodiment, the connection portion 15 is disposed in a positioning groove 151 on the plate body 10, and combined with Figure 3 As shown, the positioning groove 151 is used to position the locking band 30 used to connect the two plate bodies 10. In other words, after the two plate bodies 10 are set at both ends of the multiple battery cells 100, the locking band 30 is positioned in the positioning groove and the locking band 30 is fastened to the two plate bodies 10 to form a battery module.

[0045] It should be noted that the locking belt 30 is a steel belt, which can be locked by a buckle so as to fix the two plate bodies 10 together, thereby forming a battery module with the multiple battery cells 100 located between the two plate bodies 10 .

[0046] In practical applications, in order to improve the connection strength, the plate 10 is usually made of metal materials such as aluminum alloy. Aluminum alloy has a large thermal conductivity. When the battery module works for a long time, the battery cell 100 will generate a lot of heat, and the heat of the battery cell located in the middle of the multiple battery cells 100 is large and difficult to diffuse, which leads to different temperatures between each battery cell. In the case of inconsistent temperatures, the pressure difference of each battery cell will gradually increase, thereby affecting the service life of the battery module. For this reason, the battery cell located near the plate 10 among the multiple battery cells 100 needs to be heated so that each battery cell maintains a basically same temperature range.

[0047] In this embodiment, a receiving groove 16 is further provided at the bottom of the plate body 10 along the height direction of the plate body 10. Figure 3 As shown, the receiving groove 16 is used to accommodate the heating component 40, wherein the heating component 40 can heat the plate body 10 and transfer the heat to the battery cell 100 close thereto through the plate body 10 to indirectly heat the battery cell, thereby ensuring that each battery cell 100 is in substantially the same temperature range, thereby extending the service life of the battery module.

[0048] When two battery modules are stacked, due to the arrangement of the first fixing portion 11, in order to avoid the influence of the first bolt on the first fixing portion 11, a corresponding avoidance structure needs to be arranged to avoid the first bolt. Figure 1 and Figure 2 As shown, along the thickness direction Y of the plate body 10, the plate body 10 is provided with a first protruding portion 17 and a second protruding portion 18 protruding outward and spaced from each other, the fastening portion 13 is arranged on the first protruding portion 17, and the positioning portion 14 is arranged on the second protruding portion 18. Since the thickness direction Y of the plate body 10 is perpendicular to the height direction Z of the plate body 10, the first bolt of the first fixing portion 11 can be avoided by the first protruding portion 17 and the second protruding portion 18.

[0049] In this embodiment, the fastening portion 13 is a through hole provided on the first protruding portion 17 , the positioning portion 14 is a protrusion 141 provided on the second protruding portion 18 , and the second protruding portion 18 is further provided with a screw hole penetrating the protrusion 141 .

[0050] In a specific embodiment, in combination Figure 7 As shown, when two battery modules are stacked, a support body 50 is arranged between the corresponding plate bodies 10, and a through hole is correspondingly arranged on the support body 50 along the height direction Z of the plate body 10, and a positioning groove is arranged at the bottom of the through hole. After the two battery modules are stacked, the support body 50 is located between the second protrusion 18 of the upper battery module and the first protrusion 17 of the next battery module, and the protrusion is positioned in the positioning groove, and the connecting bolt 51 is sequentially passed through the through hole on the first protrusion 17 and the through hole on the support body 50 and then screwed into the screw hole of the protrusion 141, so that the battery modules are stacked and connected to form a stacked battery.

[0051] See also Figure 3 As shown, this embodiment provides a battery module, which includes: two end plates in the above embodiments, and also includes: a plurality of battery cells 100 arranged in sequence, the two end plates are respectively arranged at the opposite ends of the plurality of battery cells 100 arranged in sequence, and the two end plates are fixedly connected to form a battery module.

[0052] See also Figure 7 As shown, this embodiment also provides a stacked battery, which includes: at least two battery modules in the above embodiments, and also includes: a support body 50, along the height direction of the support body 50, a positioning groove is provided on one side of the support body 50 facing the positioning portion 14, and the positioning groove is used to position on the positioning portion 14.

[0053] In summary, in the end plate, battery module and stacked battery provided by the present application, the plate body is fixed to the top or bottom of the box body by the first fixing part, and the plate body is fixed to the side of the box body by the second fixing part at the same time, or the first fixing part or the second fixing part is used alone to fix the plate body to the box body, so that the end plate can be widely used in different installation occasions. The positioning part is positioned on the support body, and the fastening part can stack and fix the plate body in the previous battery module with the plate body in the next battery module, thereby forming a stacked battery.

[0054] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An end plate, characterized in that: It includes: a plate body, along the height direction of the plate body, the plate body is provided with a first fixing portion, and one side of the plate body is provided with a fastening portion, the other side of the plate body is provided with a positioning portion, and along the width direction of the plate body, the plate body is provided with a second fixing portion; the first fixing portion is used to fix the plate body to the box body along the height direction of the plate body, the second fixing portion is used to fix the plate body to the box body along the width direction of the plate body, the positioning portion is used to position the support body, and the fastening portion is used to stack and fix the upper plate body with the lower plate body.

2. The end plate according to claim 1, characterized in that: The plate body is also provided with at least one connecting portion, and the two plate bodies can be connected to each other through the connecting portion.

3. The end plate according to claim 2, characterized in that: The connecting portion is arranged in a positioning groove on the plate body, and the positioning groove is used to position a locking belt used to connect two plate bodies.

4. The end plate according to claim 1, characterized in that: A receiving groove is also provided at the bottom of the plate body along the height direction of the plate body, and the receiving groove is used to receive the heating component.

5. The end plate according to claim 1, characterized in that: The first fixing portion is a first blind hole provided on the plate body along the height direction of the plate body and having a first internal thread section at the bottom, or the first fixing portion is a first through hole provided on the plate body along the height direction of the plate body.

6. The end plate according to claim 1, characterized in that: The second fixing portion is a second blind hole which is arranged on the plate body along the width direction of the plate body and has a second internal thread section at the bottom, or the second fixing portion is a second threaded hole.

7. The end plate according to claim 1, characterized in that: Along the thickness direction of the plate body, the plate body is provided with a first protruding portion and a second protruding portion protruding outward and spaced apart from each other, the fastening portion is arranged on the first protruding portion, and the positioning portion is arranged on the second protruding portion.

8. The end plate according to claim 7, characterized in that The fastening portion is a through hole provided on the first protruding portion, the positioning portion is provided on a protrusion of the second protruding portion, and the second protruding portion is further provided with a screw hole penetrating the protrusion.

9. A battery module, characterized in that: include: The two end plates as described in any one of claims 1-8 further include: a plurality of battery cells arranged in sequence, the two end plates are respectively arranged at opposite ends of the plurality of battery cells arranged in sequence, and the two end plates are fixedly connected.

10. A stacked battery, characterized in that: include: At least two battery modules according to claim 9 further include: a support body, wherein a positioning groove is provided on one side of the support body facing the positioning portion along a height direction of the support body, and the positioning groove is used to be positioned on the positioning portion.

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