CN217507530U

CN217507530U - Secondary battery module

Info

Publication number: CN217507530U
Application number: CN202221034066.9U
Authority: CN
Inventors: 代华; 陈鑫; 李文龙; 刘思; 侯敏; 曹辉
Original assignee: Rept Battero Energy Co Ltd
Current assignee: Rept Battero Energy Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-09-27
Anticipated expiration: 2032-04-29

Abstract

The application relates to a secondary battery module, and relates to the field of batteries. This secondary battery module includes a plurality of battery monomer that set up side by side, and the free outside of battery that is located the head and the tail both ends all is equipped with the end plate, and is adjacent between the battery monomer and each the end plate is with adjacent all be equipped with the spacer main part between the battery monomer, each the spacer main part all includes first cushion and second cushion, and one of them is located to first cushion the free lateral wall of battery, the second cushion is located the end plate adjacent with this battery monomer or adjacent the free lateral wall that corresponds of battery, minimum distance between first cushion and the second cushion is not more than first distance of predetermineeing. The application provides a secondary battery module's first cushion and second cushion locate respectively on the object of difference, and the minimum distance along vertical direction is not more than first preset distance, and this makes first cushion and second cushion can form spacing structural relation, can prevent to take place relative slip between the battery monomer.

Description

Secondary battery module

Technical Field

The present invention relates to the field of batteries, and more particularly, to a secondary battery module.

Background

At present, secondary battery's common scheme design is modular equipment in the trade, designs into the secondary battery module promptly, and the secondary battery module is set up by secondary battery side by side, piles up along its thickness direction and forms, and the secondary battery module divide into split type and integral two kinds, interconnect between the battery monomer of integral secondary battery module, and the structure is a whole, and the battery monomer of split type secondary battery module is then all independent each other.

For the integral secondary battery module, because the battery monomers are fixedly connected, when a single battery monomer needs to be replaced, or when a structure for buffering expansion between two adjacent battery monomers needs to be replaced, the operation is difficult, time and labor are consumed, other intact battery monomers can be damaged, the destructiveness is high, and the operation difficulty is high; for the split type secondary battery, because the adjacent two battery cells and the battery cells, the end plate and the housing are only clamped and fixed, the stability of the overall structure of the battery cells is poor, and even the battery cells may move relative to each other and slide out of the housing.

In the related art, for the split type secondary battery module, in order to ensure the structural stability thereof, the structure of the housing may be modified accordingly, for example, made into a closed type or additionally provided with other structures for fixing, although the fixing function is performed, the difficulty and cost of manufacturing are increased as a whole, and the overall structure is complicated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a secondary battery module to solve the problem that the single shell structure of split secondary battery module's battery is more complicated among the correlation technique, leads to the preparation degree of difficulty big, with high costs.

The application provides a secondary battery module, which comprises a plurality of battery monomers arranged side by side, end plates are arranged at the outer sides of the battery monomers at the head end and the tail end,

a spacer main body is arranged between every two adjacent single batteries and between every two adjacent end plates and the single batteries, and each spacer main body comprises at least one first spacer block and at least one second spacer block;

the first cushion block is arranged on one side wall of the battery monomer, the second cushion block is arranged on an end plate adjacent to the battery monomer or an adjacent corresponding side wall of the battery monomer, and the minimum distance between the first cushion block and the at least one second cushion block in the vertical direction is not larger than a first preset distance.

In some embodiments, the distance between adjacent edges of the first and second pads is equal.

In some embodiments, a deformation buffer area is further included between the first cushion block and the second cushion block, and an area of the deformation buffer area is greater than or equal to a first preset area.

In some embodiments, the bottom end of the first cushion block is provided with at least one first extension portion extending in a direction close to the second cushion block, and a distance between the bottom end of the first extension portion and the second cushion block is not greater than the first preset distance.

In some embodiments, when the number of the first extending portions is one, the first extending portions are arranged in the middle of the bottom end of the first cushion block;

when the number of the first extending parts is two, the two first extending parts are respectively and symmetrically arranged at the bottom end of the first cushion block to form a U-shaped structure.

In some embodiments, the top end of the second cushion block is provided with at least one second extending portion extending towards the direction close to the first cushion block, and the deformation buffer area is formed among the first extending portion, the second extending portion, the first cushion block and the second cushion block.

In some embodiments, when the number of the first extension parts and the second extension parts is one, the first extension parts and the second extension parts are staggered;

when the number of the first extending parts is two, and the number of the second extending parts is one, the two first extending parts are respectively and symmetrically arranged at the bottom end of the first cushion block to form a U-shaped structure, and the second extending parts are contained in the U-shaped structure.

In some embodiments, the top of the first cushion block can be lower than the top of the single battery, and the distance between the top of the first cushion block and the top of the single battery is 0-35 mm;

or the top of the first cushion block extends out of the top of the single battery, and the value range of the top of the single battery extending out of the top of the single battery is 0-20 mm;

the distance between the bottom of the second cushion block and the bottom of the battery monomer is 0-55 mm.

In some embodiments, the first preset distance and the second preset distance both have a value ranging from 0.1mm to 100mm, and the first preset area has a value ranging from 10 mm to 20000mm ² 。

In some embodiments, the battery pack further comprises a casing, the casing is in a square cylinder shape and is sleeved on the battery cells and the end plates, and the inner wall of the casing is connected with the outer side faces of the end plates.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a secondary battery module, because the first cushion block is arranged on the side wall of one battery monomer, the second cushion block is arranged on the end plate adjacent to the battery monomer or the corresponding side wall of the adjacent battery monomer, and the minimum distance between the first and second head blocks is not greater than a first predetermined distance, and therefore, because the first cushion block and the second cushion block are respectively arranged on different objects, and the minimum distance between the first cushion block and the second cushion block is not more than the first preset distance, the first cushion block and the second cushion block can form a mutual spacing structural relationship, thereby can prevent effectively that battery monomer from taking place relative slip relative other battery monomer or end plate, guarantee the structural integrity of whole module, compare in improving through the casing and realize spacingly, this secondary battery module has simplified holistic structure, has still saved the material of preparation cushion to a certain extent.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a secondary battery module according to an embodiment of the present disclosure;

fig. 2 is a schematic vertical sectional view of a secondary battery module according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view illustrating a case where a first block and a second block of a secondary battery module provided in an embodiment of the present application are both square;

fig. 4 is a schematic structural view illustrating a case where a first pad and a second pad of a secondary battery module provided in an embodiment of the present application are both in the shape of a right trapezoid;

fig. 5 is a schematic structural view illustrating a first block and a second block of a secondary battery module provided in an embodiment of the present disclosure, both of which are L-shaped;

fig. 6 is a schematic structural view illustrating a U-shaped first block or second block of a secondary battery module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural view illustrating a secondary battery module according to an embodiment of the present disclosure, in which a first block is square and a second block is square;

fig. 8 is a schematic structural view illustrating a secondary battery module according to an embodiment of the present disclosure, in which a first block is a hollow square and a second block is a circular;

fig. 9 is a schematic structural view illustrating a spacer main body of a secondary battery module according to an embodiment of the present invention including a first extending portion;

fig. 10 is a schematic structural view illustrating a spacer main body of a secondary battery module according to an embodiment of the present disclosure, the spacer main body including two first extending portions;

fig. 11 is a schematic structural view illustrating a spacer body of a secondary battery module according to an exemplary embodiment of the present invention, the spacer body including a first extension part and a second extension part;

fig. 12 is a schematic structural view illustrating a spacer main body of a secondary battery module according to an embodiment of the present disclosure, the spacer main body including two first extending portions and one second extending portion.

In the figure: 1-single battery, 2-end plate, 3-spacer main body, 30-first spacer block, 31-second spacer block, 32-first extension part, 33-second extension part and 4-deformation buffer zone.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a secondary battery module, which can solve the problems of high manufacturing difficulty and high cost caused by the complicated structure of a single shell of a battery of the split secondary battery module in the related technology.

Referring to fig. 1 and 2, the secondary battery module includes a plurality of battery cells 1 arranged side by side, end plates 2 are disposed outside the battery cells 1 at the head and tail ends, a spacer main body 3 is disposed between the adjacent battery cells 1 and between each end plate 2 and the adjacent battery cell 1, each spacer main body 3 includes at least one first spacer block 30 and at least one second spacer block 31, the first spacer block 30 is disposed on a side wall of one of the battery cells 1, the second spacer block 31 is disposed on a corresponding side wall of the end plate 2 adjacent to the battery cell 1 or the adjacent battery cell 1, and the minimum distance between the first spacer block 30 and the at least one second spacer block 31 is not greater than a first preset distance.

This secondary battery module is because first cushion 30 locates the lateral wall of one of them battery monomer 1, second cushion 31 locates the corresponding lateral wall of the terminal plate 2 or adjacent battery monomer 1 adjacent with this battery monomer 1, locate respectively on different objects, and the minimum distance between first cushion 30 and at least one second cushion 31 is not more than first preset distance, this makes first cushion 30 and second cushion 31 can form spacing structural relation, can effectually prevent that battery monomer 1 from taking place relative slip relative other battery monomers 1 or terminal plate 2, even if produce and slide, gliding distance can not exceed first preset distance, the structural integrity of whole module has been guaranteed, and the size of first preset distance is very little, it is the installation accuracy when adapting to first cushion 30 and second cushion 31 installation, avoid taking place the problem of overlapping.

First cushion 30 and second cushion 31 in this secondary battery module all adopt the more excellent material of resilience to make, compare in the aerogel that traditional often adopted, in reduce cost, also avoided the aerogel will "collapse" under the effect of less electric core expanding force and lose the problem of resilience, consequently the cycle life of this secondary battery module also can obtain obvious promotion, the expansion space that has of battery monomer 1 ability is timely when taking place the inflation. In addition, in the secondary battery module, the first cushion block 30 is arranged on the side wall of one of the single batteries 1, and the second cushion block 31 is arranged on the end plate 2 adjacent to the single battery 1 or the corresponding side wall of the adjacent single battery 1, so that the electrical distance and the creepage distance between the single secondary battery pole and the adjacent conductive pieces thereof are increased, and the insulating property between the single batteries 1 is improved.

Further, the distance between the adjacent edges of the first cushion block 30 and the second cushion block 31 is equal. Specifically, in this structure, the best limit effect can be achieved, as shown in fig. 3-7, the first cushion block 30 and the second cushion block 31 can be in various shapes, such as square, right trapezoid, L-shaped, circular, U-shaped, etc., it should be noted that, no matter what shape, the premise is that the first cushion block 30 and the second cushion block 31 can form a matching relationship therebetween, for example, when the first cushion block 30 is circular, the second cushion block 31 is a square structure having a hollow area, and when the first cushion block 30 is right trapezoid, the second cushion block 31 is also a right trapezoid symmetrically disposed at opposite angles. The first block 30 and the second block 31 may be of other shapes than those shown in fig. 3-7 as desired.

Specifically, the structures shown in fig. 3 to 7 are all schematic structural diagrams when the number of the first cushion block 30 and the second cushion block 31 is only one, and in some other embodiments, the number of the first cushion block 30 and the second cushion block 31 may be multiple.

First cushion 30 and second cushion 31 in this secondary battery module all adopt the more excellent material of resilience to make, compare in the aerogel that traditional often adopted, in reduce cost, also avoided the aerogel will "collapse" under the effect of less electric core expansion force and lose the problem of resilience, consequently the cycle life of this secondary battery module also can obtain obvious promotion. Because the first cushion block 30 and the second cushion block 31 are respectively arranged between every two adjacent single batteries 1 and between the single batteries 1 and the end plate 2, if the whole area of the first cushion block 30 and the whole area of the second cushion block 31 are too large, the problem that a material with good rebound resilience can be compressed by a large battery core expansion force may exist, and the problem that the single batteries 1 are damaged due to the too large expansion force during extrusion may be caused. Therefore, it is further, still include a deformation buffer 4 between first cushion 30 and the second cushion 31, and the first predetermined area of area more than or equal to of deformation buffer 4, owing to formed deformation buffer 4 between first cushion 30 and the second cushion 31, the total area that has reduced first cushion 30 and second cushion 31 on the basis of guaranteeing to have good resilience, guarantee can continuously provide the basis in inflation space when using on, also can in time provide the inflation space when taking place the inflation, battery cell 1 has been protected to a certain extent.

Further, at least one first extending portion 32 extending toward the second cushion block 31 is disposed at the bottom end of the first cushion block 30, and a distance between the bottom end of the first extending portion 32 and the second cushion block 31 is not greater than a first preset distance. Specifically, the first extending portion 32 is a slender structure, and is disposed between the first cushion block 30 and the second cushion block 31, and the main function of the first extending portion is limiting, that is, when the single battery 1 slides downwards and moves a first preset distance, the end of the first extending portion 32 abuts against the top of the second cushion block 31 located below, so as to achieve the purpose of limiting the single battery 1 from further sliding. It should be noted that although the first extension portion 32 is elongated, the width dimension is not too thin, and it is necessary to ensure that the area of the deformation buffer 4 is equal to or larger than the first predetermined area and provide a certain supporting force.

Further, as shown in fig. 9, the number of the first extending portions 32 is one, and the first extending portions 32 are disposed in the middle of the bottom end of the first pad block 30. Specifically, the number of the first extending portions 32 may be one, and from the perspective of structural design, in order to ensure that the first extending portions 32 can better exert a limiting effect, the first extending portions 32 are disposed in the middle of the bottom end of the first cushion block 30. Referring to fig. 10, the number of the first extending portions 32 is two, and the two first extending portions 32 are symmetrically disposed at the bottom end of the first cushion block 30, respectively, to form a U-shaped structure. Specifically, the U-shaped structure can better guarantee stability to realize spacing. In addition to the above-mentioned U-shaped structure, the two first extending portions 32 may also be disposed at positions close to the middle of the bottom end, and specifically may be adjusted according to the actual widths of the first cushion block 30 and the second cushion block 31, if the width is smaller, the two first extending portions may be disposed at two sides to form the U-shaped structure, if the width is larger, in order to prevent the distance between the two first extending portions 32 from being too large to cause poor limiting effect, and therefore the distance between the two first extending portions 32 is appropriately adjusted.

Further, the top end of the second cushion block 31 is provided with at least one second extending portion 33 extending towards the direction close to the first cushion block 30, a deformation buffer zone 4 is formed among the first extending portion 32, the second extending portion 33, the first cushion block 30 and the second cushion block 31, and the distance between the top end of the second extending portion 33 and the first cushion block 30 is not greater than a second preset distance.

Further, referring to fig. 11, the number of the first extension portions 32 and the second extension portions 33 is one, and the first extension portions 32 and the second extension portions 33 are staggered. Specifically, from the perspective of manufacturing, when the shapes of the first pad block 30 and the second pad block 31 are different, the first pad block 30 and the second pad block 31 need to be manufactured in batches, and when the shapes are the same, the first pad block and the second pad block can be manufactured in a unified manner, so that the manufacturing process is simplified, and the time cost is saved, therefore, the number of the first extending portions 32 and the number of the second extending portions 33 are both one, and the first extending portions 32 and the second extending portions 33 are respectively arranged at the end edge sides of the first pad block 30 and the second pad block 31, and at this time, the first pad block 30 and the first extending portions 32 form an L shape, and the second pad block 31 and the second extending portions 33 also form an L shape, and the shapes of the first pad block and the second pad are the same.

When the width of the battery cell 1 is larger or the volume of the battery cell 1 itself is larger, the difficulty of limiting is higher at this time, and in order to ensure the best possible limiting effect, further, as shown in fig. 12, the number of the first extending portions 32 is two, the number of the second extending portions 33 is one, the two first extending portions 32 are respectively and symmetrically arranged at the bottom end of the first cushion block 30 to form a U-shaped structure, and the second extending portions 33 are accommodated in the U-shaped structure.

Further, in order to facilitate the installation of the first cushion block 30 and the second cushion block 31, and reduce the production accuracy requirement of the first cushion block 30 and the second cushion block 31, the creepage distance between the single pole of the secondary battery and the adjacent conductive pieces thereof is increased, so that the insulating property between the secondary single bodies is improved, therefore, the distance between the top of the first cushion block 30 and the top of the single battery 1 is 0-35 mm, the distance between the bottom of the second cushion block 31 and the bottom of the single battery 1 is 0-55 mm, even if the first cushion block 30 and the second cushion block 31 generate errors during the installation or production, the reinstallation or the production is not up to standard. In order to further reduce the requirement on the production precision of the first cushion block 30, and simultaneously to separate the top position pole column and the adjacent conductive piece between the single batteries 1, the electric gap and the creepage distance between the secondary single battery pole column and the adjacent conductive piece are increased, so that the insulating property between the single batteries 1 is improved, the top of the first cushion block 30 can be lower than that of the single batteries 1, in addition, in other embodiments, the top of the first cushion block 30 can also extend out of the top of the single batteries 1, and the value range extending out of the top of the single batteries 1 is 0-20 mm.

Further, the value ranges of the first preset distance and the second preset distance are both 0.1 mm-100 mm, and the value range of the first preset area is 10-20000 mm ² . Specifically, the value ranges or specific values of the first preset distance, the second preset distance and the first preset area are adaptively adjusted according to parameters such as the width and the height of the battery cell 1.

Further, this secondary battery module still includes the casing, and the casing is the square tube shape and overlaps and locate battery monomer 1 and end plate 2 on, and the inner wall of casing links to each other with the lateral surface of end plate 2. Because the spacing relation has been formed between end plate 2 and battery monomer 1 to and between battery monomer 1 and the battery monomer 1, consequently need be in the special shape with the casing customization among the correlation technique and realize spacing or location, the casing in this secondary battery module only be hollow square tube shape can, simplified structure and the preparation degree of difficulty, also reduced the cost of manufacture.

Further, the first extension 32 is integrally formed with the first head block 30, and the second extension 33 is integrally formed with the second head block 31.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a secondary battery module, its includes a plurality of battery monomer (1) that set up side by side, is located head and the tail both ends the outside of battery monomer (1) all is equipped with end plate (2), its characterized in that:

a spacer main body (3) is arranged between every two adjacent single batteries (1) and between each end plate (2) and the adjacent single batteries (1), and each spacer main body (3) comprises at least one first spacer block (30) and at least one second spacer block (31);

the first cushion block (30) is arranged on one side wall of the single battery (1), the second cushion block (31) is arranged on an end plate (2) adjacent to the single battery (1) or adjacent to the corresponding side wall of the single battery (1), and the minimum distance between the first cushion block (30) and the second cushion block (31) in the vertical direction is not larger than a first preset distance.

2. The secondary battery module according to claim 1, wherein: the distances between the adjacent edges of the first cushion block (30) and the second cushion block (31) are equal.

3. The secondary battery module according to claim 1, wherein: the deformation buffer area (4) is arranged between the first cushion block (30) and the second cushion block (31), and the area of the deformation buffer area (4) is larger than or equal to a first preset area.

4. The secondary battery module according to claim 3, wherein: the bottom end of the first cushion block (30) is provided with at least one first extending portion (32) extending towards the direction close to the second cushion block (31), and the distance between the bottom end of the first extending portion (32) and the second cushion block (31) is not larger than the first preset distance.

5. A secondary battery module according to claim 4, wherein:

when the number of the first extending parts (32) is one, the first extending parts (32) are arranged in the middle of the bottom end of the first cushion block (30);

when the number of the first extending parts (32) is two, the two first extending parts (32) are respectively and symmetrically arranged at the bottom end of the first cushion block (30) to form a U-shaped structure.

6. A secondary battery module according to claim 4, wherein: the top end of the second cushion block (31) is provided with at least one second extending part (33) extending towards the direction close to the first cushion block (30), and the deformation buffer area (4) is formed among the first extending part (32), the second extending part (33), the first cushion block (30) and the second cushion block (31).

7. The secondary battery module according to claim 6, wherein:

when the number of the first extension parts (32) and the second extension parts (33) is one, the first extension parts (32) and the second extension parts (33) are arranged in a staggered mode;

when the number of the first extending parts (32) is two and the number of the second extending parts (33) is one, the two first extending parts (32) are respectively and symmetrically arranged at the bottom end of the first cushion block (30) to form a U-shaped structure, and the second extending parts (33) are accommodated in the U-shaped structure.

8. The secondary battery module according to claim 1, wherein:

the top of the first cushion block (30) is lower than the top of the single battery body (1), and the distance between the top of the first cushion block (30) and the top of the single battery body (1) is 0-35 mm;

or the top of the first cushion block 30 extends out of the top of the single battery body (1), and the value range extending out of the top of the single battery body (1) is 0-20 mm;

the distance between the bottom of the second cushion block (31) and the bottom of the single battery body (1) is 0-55 mm.

9. The secondary battery module according to claim 1, wherein: the value range of the first preset distance is 0.1-100 mm, and the value range of the first preset area is 10-20000 mm ² 。

10. The secondary battery module according to claim 1, wherein: the battery pack is characterized by further comprising a shell, wherein the shell is in a square cylindrical shape and is sleeved on the battery monomer (1) and the end plate (2), and the inner wall of the shell is connected with the outer side face of the end plate (2).