CN220172284U

CN220172284U - Battery pack shell structure and battery pack

Info

Publication number: CN220172284U
Application number: CN202321474133.3U
Authority: CN
Inventors: 朱凯鹏
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-12-12
Anticipated expiration: 2033-06-09

Abstract

The utility model provides a battery pack shell structure and a battery pack, wherein the battery pack shell structure comprises a shell body with a containing cavity, the shell body is provided with a base, side plates respectively arranged at two ends of the base and a partition plate arranged between the side plates at two sides, the containing cavity is divided into a plurality of sub-cavities by the partition plate, and each sub-cavity is used for containing an electric core. The bottom end of at least one side plate is rotationally arranged on the base, and a limiting part for limiting the rotation angle of the side plate is arranged between the side plate and the base. The baffle is detachably arranged on the base. According to the battery shell structure, at least one side plate of the battery shell structure is rotatably connected to the base, so that after the battery core is placed first, the battery core is fixed after the side plate is turned over, and the stacking assembly of the battery core and the disassembly of a single battery core are facilitated. Meanwhile, by arranging the detachable partition plate, the damage of the battery cell s caused by the dimension error of the battery cell is prevented, and the production cost is saved.

Description

Battery pack shell structure and battery pack

Technical Field

The utility model relates to the technical field of battery pack manufacturing, in particular to a battery shell structure. The utility model also relates to a battery pack with the battery pack shell structure.

Background

With further development of technology, lithium batteries are an important electric energy source in the fields of new energy automobiles and the like, single battery cells are often packaged in battery cases to form an integral battery module, and then peripheral circuits are used for assisting to form an independent battery module.

In the prior art, a plurality of layers of battery cells are stacked in a battery shell for assembling a blade battery, and CCS battery cover plate assemblies for connecting polar posts are arranged at two ends of each battery cell and used for providing temperature sampling and battery cell voltage sampling functions of the battery and realizing the function of high-voltage serial-parallel connection between the battery cells. Then, the battery pack cover body is covered on the battery shell body, so that the blade battery is packaged.

However, because the clearance between the battery cell and the battery shell is not easy to be too large, the battery cell is difficult to be placed in the shell when being slightly inclined in the placing process, the thickness of the battery cell is thinner, the battery cell is easy to be damaged when being subjected to the resistance of the shell, the failure of the blade battery cell is caused, and the production cost is increased. And when the capacity attenuation of the power battery is different in the use process, the abnormal battery core needs to be replaced, but the single battery core is very difficult to take out due to the too small gap between the battery core and the battery shell, so that the repair work is difficult, and the repair efficiency is reduced.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery can structure that can facilitate the assembly and disassembly of the battery cells and can accommodate the easy damage of the battery cells during the assembly process.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the battery shell structure comprises a shell body with a containing cavity, wherein the shell body is provided with a base, side plates respectively arranged at two ends of the base and a partition plate arranged between the side plates at two sides, the partition plate divides the containing cavity into a plurality of sub-cavities, and each sub-cavity is used for containing an electric core;

the bottom end of at least one side plate is rotatably arranged on the base, and a limiting part for limiting the rotation angle of the side plate is arranged between the side plate and the base;

the partition board is detachably arranged on the base.

Further, the two side plates are arranged at intervals along the width direction of the base;

the position of the partition board in the width direction of the base is adjustable.

Further, a bottom cooling cavity is arranged on the base, a side cooling cavity is arranged on one side plate of the base, and the side cooling cavity is communicated with the bottom cooling cavity;

the side plate is provided with a cooling liquid inlet communicated with the side cooling cavity, and the base is provided with a cooling liquid outlet communicated with the bottom cooling cavity.

Further, the partition plate is filled with phase change materials; and/or the number of the groups of groups,

the other side of the side plate is internally provided with a cavity, and the cavity is filled with phase change materials.

Further, a partition piece is arranged in the side plate, the partition piece divides the cavity into a plurality of split bodies which are arranged at intervals along the length direction of the side plate, and each split body is filled with the phase change material.

Further, the side plate comprises a side plate main body and a plugging piece arranged at the top of the side plate main body;

the side plate main body is internally provided with the cavity, and the plugging piece is plugged at the top of the cavity.

Further, the base comprises a base body and a bottom plate, wherein the base body is provided with a cooling groove with an open bottom, and the bottom plate is plugged at the bottom of the cooling groove and forms a bottom cooling cavity with the base body in a surrounding manner;

the base body and/or be equipped with the support column on the bottom plate, the support column supports the base body with between the bottom plate.

Further, the separator is formed by extrusion of aluminum materials; and/or the number of the groups of groups,

the base body is formed by die casting.

Further, one side plate is welded with the base, and a positioning part is arranged between the side plate and the base, and the side plate is positioned on the base by the positioning part.

Compared with the prior art, the utility model has the following advantages:

according to the battery shell structure, the side plates are arranged on the base, at least one side plate is connected to the base in a rotating mode, when the battery core is placed in the shell body, the battery core can be fixed in the shell body after being placed first and then turned over, and therefore stacking and assembling of the battery core and disassembling of single battery core are facilitated. Meanwhile, by arranging the detachable partition board, when the blade battery cells are placed in the split cavities, the stacked battery cells are placed first, and then the partition board is used for fastening and positioning, so that the battery cells are prevented from being damaged due to dimensional errors of the battery cells, and the production cost is saved.

In addition, through the bottom cooling chamber and the lateral part cooling chamber that set up the intercommunication on the base with the curb plate to make the coolant liquid circulate between base and curb plate, be used for cooling down the bottom and the side of electric core, improve the cooling effect, and can make the temperature of bottom and side comparatively even, avoid electric core local temperature higher.

In addition, the phase change material is filled in the partition plate and/or the side plate, so that the cooling effect is further ensured, and the bottom and the two side surfaces of the battery cell are simultaneously cooled. Through setting up the location portion, do benefit to the hookup location precision of its curb plate and base, still further guarantee the connection effect in bottom cooling chamber and lateral part cooling chamber, do benefit to the cooling of coolant liquid.

Another object of the present utility model is to provide a battery pack having the battery pack case structure as described above.

According to the battery pack, the battery pack shell structure is arranged, so that the battery cells can be conveniently installed and detached, and the assembly efficiency and the production quality of the battery pack are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural view of a battery pack according to an embodiment of the present utility model, which does not include a cover;

fig. 2 is a perspective view illustrating a first view of a battery pack case structure according to an embodiment of the present utility model;

fig. 3 is a schematic perspective view of a battery pack case structure according to an embodiment of the present utility model, excluding a bottom plate;

fig. 4 is a schematic perspective view illustrating a second view of a battery pack case structure according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of the structure at A-A in FIG. 3;

fig. 6 is a schematic perspective view of a first view angle of a left side plate according to an embodiment of the present utility model;

fig. 7 is a schematic perspective view of a second view angle of the left side plate according to an embodiment of the present utility model;

fig. 8 is a schematic perspective view of a separator according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a housing body; 2. a battery cell; 3. a CCS component; 4. an insulating material;

101. a base; 102. a left side plate; 103. a right side plate; 104. a partition plate; 105. a cavity is divided;

1011. a bottom cooling chamber; 1012. an inlet; 1013. a base body; 1014. a bottom plate; 1015. a support column; 1016. a separator bar;

1021. a side cooling cavity; 1022. an outlet; 1023. a cavity; 1024. a partition;

1025. a protruding portion; 1026. a blocking member; 1027. a positioning part;

1031. a plate body; 1032. an arc part;

10131. a cooling tank; 10271. and (5) inserting blocks.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. In addition, the terms "first," "second," are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The present embodiment relates to a battery pack case structure including a case body 1 having a housing cavity, the case body 1 having a base 101, side plates provided at both ends of the base 101 separately, and a partition 104 provided between the side plates at both sides, the partition 104 dividing the housing cavity into a plurality of sub-cavities 105, each sub-cavity 105 being for housing a battery cell 2. And, the bottom of at least one side plate is rotatably arranged on the base 101, and a limiting part for limiting the rotation angle of the side plate is arranged between the side plate and the base 101. The partition 104 is detachably disposed on the base 101.

According to the battery pack shell structure, the side plates are arranged on the base 101, at least one side plate of the side plates is rotatably connected to the base 101, when the battery cell 2 is placed on the shell body 1, the battery cell 2 can be placed first, then the side plates are turned over, the battery cell 2 is fixed in the shell body 1, and the battery cell 2 can be conveniently stacked and assembled and detached from the single battery cell 2. Meanwhile, by arranging the detachable partition plate 104, when the blade battery cells 2 are placed in the cavity 105, the stacked battery cells 2 are placed first, and then the partition plate 104 is used for fastening and positioning, so that the battery cells 2 are prevented from being damaged due to the dimensional error of the battery cells 2, and the production cost is saved.

Based on the above overall description, in an exemplary structure of the battery pack case structure of the present embodiment, as shown in fig. 1, a partition 104 is provided to divide the accommodating chamber into two sub-chambers 105, the blade battery is stacked in the two sub-chambers 105, and the battery post is electrically connected with CCS assemblies 3 on both sides.

As a preferred embodiment, the two side plates of the present embodiment are arranged at intervals in the width direction of the base 101, and the position of the partition 104 in the width direction of the base 101 is adjustable. In a specific structure, as shown in fig. 2, two sides are fixed to both sides of the base 101 along the width direction of the base 101, respectively, and the partition 104 is fixed to the base 101 by bolts.

As shown in fig. 2, the spacer 104 is provided with stepped surfaces at both ends in the longitudinal direction of the spacer 104 for fixing, and long holes extending in the thickness direction of the spacer 104, that is, in the width direction of the base 101 are formed in the stepped surfaces. Correspondingly, a threaded hole is formed in the base 101, and a bolt penetrates through the long hole to fix the partition plate 104 and the base 101.

In this embodiment, for convenience of explanation, the left side plate is referred to as a left side plate 102 and the right side plate is referred to as a right side plate 103 based on the state shown in fig. 2. When the battery cell 2 is placed, the base 101 and the left side plate 102 are stacked in order along the height direction of the case body 1 with reference. The battery cells 2 are pushed from right to left through the partition 104, so that the battery cells 2 of each layer are aligned, and then the partition 104 is fixed on the base 101 through bolts.

So set up, not only can improve the assembly efficiency of electric core 2 assembly, do benefit to and place electric core 2, still can not take place frictional resistance and receive the damage with casing body 1 or baffle 104 when placing because of electric core 2, can reduce the maintenance rate of electric core 2, improve the production quality of battery package.

As shown in fig. 2, the right side plate 103 includes a plate body 1031 having a rectangular parallelepiped plate-like structure, and an arc portion 1032 extending in the longitudinal direction of the right side plate 103 and connected to the lower end of the plate body 1031. The thickness of the plate 1031 is larger than the thickness of the circular arc 1032. The base 101 has a slot for accommodating the circular arc 1032, a through circular hole is provided along the length direction of the circular arc 1032, and the bottom plate 1014 is provided with a pin shaft capable of penetrating the circular hole, so that the left side plate 102 is rotatably connected with the base 101.

When the right side plate 103 is turned over to be perpendicular to the upper plane of the base 101, the bottom end of the plate 1031 abuts against the upper plane of the base 101 to form the above-mentioned limiting part, so that the side face of the battery cell 2 in the split cavity 105 is positioned and aligned, interference is avoided when the cover body is covered, and the battery cell 2 and the battery pack can be assembled conveniently.

As a preferred embodiment, the base 101 of the present embodiment is provided with a bottom cooling cavity 1011, one side plate of which is provided with a side cooling cavity 1021, and the side cooling cavity 1021 is in communication with the bottom cooling cavity 1011. The side plate is provided with a cooling liquid inlet 1012 communicated with the side cooling cavity 1021, and the base 101 is provided with a cooling liquid outlet 1022 communicated with the bottom cooling cavity 1011. In particular, as shown in FIG. 3, the bottom cooling chamber 1011 is a closed cavity 1023 formed within the base 101.

The left side plate 102 is welded to the base 101, and a positioning portion 1027 is provided therebetween, and the positioning portion 1027 positions the side plate on the base 101. The left side plate 102 of the present embodiment is fixedly connected with the base 101 vertically, and may be welded by friction welding, argon arc welding, brazing, or the like, for example, to achieve the sealing purpose.

As shown in fig. 4, 5 and 6, the bottom of the left side plate 102 of the present embodiment is provided with two protruding portions 1025 inserted into the base 101, and the protruding portions 1025 are arranged at intervals along the length direction of the left side plate 102, a positioning portion 1027 detached into the base 101 is formed between the two protruding portions 1025, and accordingly, the base 101 is provided with an insert 10271 protruding toward the slot.

Preferably, as shown in fig. 6 and 7, the left side plate 102 of the present embodiment is a rectangular shell structure, a side cooling chamber 1021 is formed in the left side plate, a plug protruding toward the base 101 is provided in the middle of the slot, and a through communication channel is formed in the plug, wherein one end of the through channel is communicated with the side cooling chamber 1021, and the other end is communicated with the bottom cooling chamber 1011.

Further, the base 101 includes a base body 1013 and a bottom plate 1014, the base body 1013 has a cooling tank 10131 with an open bottom, the bottom plate 1014 is blocked at the bottom of the cooling tank 10131, and forms a bottom cooling cavity 1011 with the base body 1013. As a specific embodiment, the base body 1013 of the present embodiment is provided with a support column 1015, and the support column 1015 is supported between the base body 1013 and the bottom plate 1014. Of course, the support columns 1015 may be provided on the bottom plate 1014, or the support columns 1015 may be provided on both the bottom plate 1014 and the base body 1013.

Specifically, as shown in fig. 3 and 5, the base body 1013 is of a rectangular parallelepiped structure, the cooling groove 10131 is provided as a rectangular groove along with the outer shape of the base body 1013, and the bottom plate 1014 is formed into a rectangular plate-like structure for blocking the opening of the cooling groove 10131. In addition, a partition bar 1016 is provided in the cooling tank 10131 along the longitudinal direction of the base body 1013, and the partition bar 1016 divides the cooling tank 10131 into two communicating sub-cooling tanks 10131.

As also shown in fig. 3 and 5, a support column 1015 extending toward the bottom plate 1014 is provided within each sub-cooling slot 10131, preferably with the support column 1015 abutting the bottom plate 1014. In the present embodiment, the support columns 1015 are arranged at intervals along the length direction of the base body 1013, and the support columns 1015 are arranged at intervals in five columns along the width direction of the cooling groove 10131. The number of columns and rows of the support columns 1015 are not particularly limited. By providing a plurality of spaced support columns 1015, the cooling fluid can form a transfer track, facilitating the circulation of the cooling fluid.

As shown in fig. 2 and 3, an inlet 1012 through which the cooling liquid enters is provided in the base body 1013, and the cooling liquid entering the cooling tank 10131 is guided to flow to the bottom of the plug by the support column 1015 and is communicated with the side cooling chamber 1021 through the communication passage of the plug. The left side plate 102 is provided with an outlet 1022 which is communicated with the side cooling cavity 1021, and cooling liquid can circulate between the base body 1013 and the left side plate 102 for cooling the bottom and the side surface of the battery cell 2, thereby improving the cooling effect.

It should be noted that, for convenience of processing implementation, the supporting columns 1015 may be connected to the bottom plate 1014, or the supporting columns 1015 may be disposed on both the base body 1013 and the bottom plate 1014. Also, as a preferred embodiment, the base body 1013 of the present embodiment is die-cast, thereby facilitating the processing and production of the base body 1013.

In addition, the partition 104 of the present embodiment is filled with a phase change material, and meanwhile, the other side plate is provided with a cavity 1023, and the cavity 1023 is filled with a phase change material. As a preferred embodiment, the phase change material of this embodiment is a phase change material such as paraffin, rosin, water, etc. to improve the heat dissipation efficiency of the contact surface with the cell 2.

In order to facilitate the placement of the phase change material, a partition 1024 is disposed in the side plate, the partition 1024 partitions the cavity 1023 into a plurality of separate bodies disposed at intervals along the length direction of the side plate, and each separate body is filled with the phase change material. In a specific structure, as shown in fig. 8, the separator 1024 has a plate-like structure, and a plurality of split members are formed by the separator 1024 being disposed in the cavity 1023 in an inclined manner.

Also, as shown in fig. 7, a separator 1024 is also provided in the separator 104 of the present embodiment to facilitate placement of the phase change material. Preferably, the separator 104 in this embodiment is formed by extrusion of aluminum material, which is convenient for production and implementation, reduces production difficulty, and is beneficial to saving production cost.

As a preferred embodiment, the side panel of this embodiment includes a side panel body and a closure 1026 disposed on top of the side panel body. A cavity 1023 is formed in the side panel body and a closure 1026 is plugged at the top of the cavity 1023. Specifically, as shown in fig. 2 and 4, a blocking member 1026 for blocking the cavity 1023 of the side plate is used in the side plate main body of the present embodiment, and furthermore, a blocking member 1026 for blocking the cavity 1023 of the partition 104 is provided in the partition 104.

Preferably, the closure 1026 is sealed with EPDM, EPP, foamed silicone, or the like, which is not only easy to install, but also prevents the phase change material from coming out and degrading the cooling effect. And after a period of use, be convenient for change phase change material, improve the life of this battery package shell structure.

Note that the arrangement of the separators 104 of the present embodiment is not limited to the arrangement direction and the number thereof, and a plurality of detachable separators 104 may be arranged to cross vertically and horizontally according to the need of the battery pack. And, the curb plate of both sides also can set up to two and all connect on base 101 for rotating, can both reach better electric core 2 installation effect.

The battery pack shell structure of this embodiment through setting up pivoted curb plate and locating the detachable baffle 104 between the curb plate, not only can improve the packaging efficiency of electric core 2, avoids the damage in the electric core 2 assembly process, improves battery pack production quality.

The present embodiment also relates to a battery pack having the battery pack case structure as described above provided therein.

In a specific structure, as shown in fig. 1, after stacking is completed by placing the battery cells 2 in the sub-cavities 105 of the battery case structure, an insulating material 4 for insulation is provided at the upper ends of the battery cells 2. After CCS components 3 are arranged on two sides of the battery cell 2 and are connected with the battery cell 2, the assembled components are buckled and fixed through a cover body with a box body structure, so that a battery pack is formed.

The battery pack according to the embodiment can facilitate the installation and the disassembly of the battery core 2 by arranging the battery pack shell structure as described above, thereby improving the assembly efficiency and the production quality of the battery pack.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery can body structure characterized in that:

the battery pack comprises a shell body with a containing cavity, wherein the shell body is provided with a base, side plates respectively arranged at two ends of the base and a partition plate arranged between the side plates at two sides, the partition plate divides the containing cavity into a plurality of sub-cavities, and each sub-cavity is used for containing a battery cell;

the partition board is detachably arranged on the base.

2. The battery can body structure of claim 1, wherein:

the two side plates are arranged at intervals along the width direction of the base;

3. The battery can body structure of claim 1, wherein:

the base is provided with a bottom cooling cavity, one side plate of the base is provided with a side cooling cavity, and the side cooling cavity is communicated with the bottom cooling cavity;

4. A battery pack housing structure according to claim 3, wherein:

the partition plate is filled with phase change materials; and/or the number of the groups of groups,

5. The battery pack case structure according to claim 4, wherein:

the side plate is internally provided with a partition piece, the partition piece divides the cavity into a plurality of split bodies which are arranged at intervals along the length direction of the side plate, and each split body is internally filled with the phase change material.

6. The battery pack case structure according to claim 4, wherein:

the side plate comprises a side plate main body and a plugging piece arranged at the top of the side plate main body;

7. A battery pack housing structure according to claim 3, wherein:

the base comprises a base body and a bottom plate, wherein the base body is provided with a cooling groove with an open bottom, the bottom plate is plugged at the bottom of the cooling groove, and the bottom plate and the base body are enclosed to form a bottom cooling cavity;

8. The battery can body structure of claim 1, wherein:

the separator is formed by extrusion of aluminum materials; and/or the number of the groups of groups,

the base body is formed by die casting.

9. The battery can body structure of claim 1, wherein:

one of the side plates is welded with the base, and a positioning part is arranged between the side plates and the base, and the side plates are positioned on the base by the positioning part.

10. A battery pack, characterized in that:

the battery pack is provided with the battery pack case structure according to any one of claims 1 to 9.