Soft package battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a soft package battery, which has a first direction and a second direction which are vertically intersected pairwise, and comprises a support piece, a first water cooling plate, a plurality of assemblies, a plurality of second water cooling plates and a plurality of battery cells, a water cooling cavity is formed in the first water cooling plate, and a connector is formed in the top of the water cooling cavity; an expansion cavity is formed in the middle of the assembly; the second water-cooling plate is arranged between every two adjacent assemblies, and a water-cooling pipeline communicated with the connector is arranged at the bottom of each second water-cooling plate; the battery cell is arranged between the adjacent assembly and the second water cooling plate, one end face of the battery cell in the first direction is attached to the second water cooling plate, the other end face of the battery cell in the first direction is attached to the expansion cavity, and the bottom of the battery cell is attached to the top face of the first water cooling plate. The lithium ion battery has the beneficial effects that the heat dissipation efficiency is improved, enough expansion space is reserved, and the safety risk of battery cell explosion is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field especially relates to a soft package battery. BACKGROUND

[0002] Soft package lithium battery is sealed by multiple battery modules, multiple single cells are arranged in each battery module to form a large capacity battery, and the storage battery on some electric vehicles nowadays is made by combining multiple soft package lithium batteries, the heat of the soft package lithium battery gradually increases during charging and discharging, which causes the temperature of the internal single cells to increase, and the excessively high temperature can cause short circuit of a single cell, and the serious one can cause the single cell to catch fire, thereby affecting all the single cells in the soft package lithium battery and seriously threatening the personal safety and property safety of the user.

[0003] In the prior art, in order to cool the single cells in the soft package battery, a liquid cooling plate is arranged at the bottom of the single cells, and a heat insulation plate is arranged between adjacent single cells, wherein the liquid cooling plate is arranged at the bottom of the single cells, and the heat dissipation efficiency is low. In addition, the two ends of the single cell are attached to the heat insulation plate, and the single cell is easily expanded due to the excessively high temperature, and there is not enough expansion space, so that the pressure in the single cell cannot be released, causing the single cell to explode, which has great safety hazards. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a soft package battery, improving the heat dissipation efficiency, reserving enough expansion space, and reducing the safety risk of single cell explosion.

[0005] In order to achieve the above purpose, the utility model provides a soft package battery, which has a first direction and a second direction perpendicular to each other, and comprises a supporting piece, a first water cooling plate, a plurality of combination pieces, a plurality of second water cooling plates and a plurality of single cells.

[0006] The first water cooling plate is arranged at the top of the supporting piece, the first water cooling plate is internally provided with a water cooling cavity, and an interface is formed at the top of the water cooling cavity.

[0007] The plurality of combination pieces are connected with the supporting piece and are arranged at intervals along the first direction, and an expansion cavity is formed in the middle of the combination piece.

[0008] The plurality of second water cooling plates are connected with the supporting piece and are arranged at intervals along the first direction, the second water cooling plate is arranged between the adjacent two combination pieces, and in the first direction, one end surface of the second water cooling plate is attached to the end surface of the combination piece, and the bottom of the second water cooling plate is provided with a water cooling pipeline in communication with the interface.

[0009] The electric core is arranged between the adjacent assembly and the second water-cooling plate, one end surface of the electric core in the first direction is arranged against the second water-cooling plate, the other end surface is arranged against the expansion cavity, and the bottom of the electric core is arranged against the top surface of the first water-cooling plate.

[0010] Further, the top of the support is provided with a mounting groove, the first water-cooling plate is arranged in the mounting groove, the top of the first water-cooling plate is provided with the interface along the first direction and the second direction, the top of the interface is provided with a sealing groove, and the water-cooling pipeline is arranged along the second direction.

[0011] Further, the cross section of the assembly in the first direction is U-shaped, the top of the assembly is provided with a limiting step towards the first water-cooling plate, one end surface of the second water-cooling plate in the first direction is partially outwardly extended to form the water-cooling pipeline, and the top outer wall of the water-cooling pipeline is arranged against the limiting step.

[0012] Further, the top of the support is provided with a clamping portion along the first direction and the second direction, and the opposite two side walls of the assembly in the second direction are provided with a clamping groove corresponding to the clamping portion.

[0013] Further, the cross section of the clamping groove in the second direction is T-shaped.

[0014] Further, the first water-cooling plate comprises a plate body and a sealing plate, the inside of the plate body is provided with the water-cooling cavity, the top of the plate body is provided with the interface, one end of the plate body is open, the opening is provided with the sealing plate, and the other end of the sealing plate is arranged against the inner wall of the mounting groove.

[0015] Further, the top of the assembly is provided with a heat dissipation hole along the second direction.

[0016] Further, the top of the electric core is provided with a positive plate and a negative plate along the second direction.

[0017] Further, a sealing cover is further included, the top of the first water-cooling plate is provided with a liquid injection hole in communication with the water-cooling cavity, and the liquid injection hole is connected with the sealing cover.

[0018] Further, the first water-cooling plate and the second water-cooling plate are both made of aluminum alloy material.

[0019] Compared with the prior art, the beneficial effects of this utility model's embodiment of a soft-pack battery are as follows: It includes a first water-cooling plate, an assembly, and a second water-cooling plate. During battery cell installation, the battery cell is positioned between an adjacent assembly and the second water-cooling plate. One end face of the battery cell is attached to the second water-cooling plate in a first direction, and the other end face is attached to an expansion cavity. The bottom of the battery cell is attached to the top surface of the first water-cooling plate. An expansion cavity is provided on the assembly, and the expansion cavity is attached to one end face of the battery cell, reserving sufficient expansion space and reducing the safety risk of battery cell explosion. Furthermore, the first water-cooling plate dissipates heat from the bottom of the battery cell, and the second water-cooling plate dissipates heat from one end face of the battery cell, increasing the heat dissipation area of ​​the battery cell and improving the heat dissipation effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the soft-pack battery according to an embodiment of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the soft-pack battery from another perspective of this utility model embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the support member of the soft-pack battery according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the soft-pack battery assembly according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the first water-cooling plate of the soft-pack battery according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the second water-cooling plate of the soft-pack battery in an embodiment of this utility model.

[0026] In the diagram, 1 is the support component; 11 is the mounting groove; 12 is the snap-fit ​​part; 2 is the first water-cooling plate; 21 is the plate body; 200 is the water-cooling cavity; 201 is the interface; 202 is the opening; 203 is the sealing groove; 22 is the sealing plate; 23 is the sealing cover; 3 is the assembly; 31 is the expansion cavity; 32 is the limiting step; 33 is the snap-fit ​​groove; 34 is the heat dissipation hole; 4 is the second water-cooling plate; 41 is the water-cooling pipe; 42 is the sealing ring; 5 is the battery cell; 51 is the positive electrode plate; 52 is the negative electrode plate; X is the first direction; Y is the second direction. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] In the description of the utility model, it should be understood that the utility model uses the terms "upper", "lower", "front", "rear", "inner", "outer" and the like to indicate the position or location relationship based on the position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not to indicate or imply that the indicated device and element must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model.

[0029] In the description of the utility model, it should be understood that the utility model uses the terms "first", "second" and the like to describe various information, but these information should not be limited to these terms, these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the utility model, the "first" information can also be referred to as "second" information, and similarly, the "second" information can also be referred to as "first" information.

[0030] As shown in Figures 1 to 6 The utility model preferred embodiment's one soft package battery has two perpendicular intersecting first direction X, second direction Y, including support piece 1, first water cooling plate 2, multiple combination parts 3, multiple second water cooling plate 4, multiple electric core 5, for the convenience of explanation, refer to Figure 1 , first direction X is the length direction of support piece 1, and second direction Y is the width direction of support piece 1, wherein, the piece is made as installation carrier and is used for installing other parts. First water cooling plate 2 is arranged at the top of support piece 1, and first water cooling plate 2 is internally provided with water cooling cavity 200, the water cooling cavity 200 is filled with cooling liquid, is used for the water cooling heat dissipation of electric core 5, and the top of water cooling cavity 200 is provided with interface 201. Multiple combination parts 3 are connected with support piece 1, and are arranged at intervals along first direction X, when electric core 5 temperature is too high and expands, in order to reserve enough expansion space, the middle part of combination part 3 is provided with expansion cavity 31. In order to improve the heat dissipation efficiency of electric core 5, multiple second water cooling plate 4 are connected with support piece 1, and are arranged at intervals along first direction X, and second water cooling plate 4 is arranged between adjacent two combination parts 3, and in first direction X, one end surface of second water cooling plate 4 is attached to the end surface of one combination part 3, and the bottom of second water cooling plate 4 is provided with water cooling pipeline 41 in communication with interface 201, the water cooling cavity 200 of first water cooling plate 2 is in communication with water cooling pipeline 41, and it is convenient to add cooling liquid, when electric core 5 is installed, electric core 5 is arranged between adjacent combination part 3 and second water cooling plate 4, specifically, one end surface of electric core 5 is attached to second water cooling plate 4 in first direction X, and the other end surface is attached to expansion cavity 31, and the bottom of electric core 5 is attached to the top surface of first water cooling plate 2. Through the heat dissipation of the bottom of electric core 5 and the end surface in first direction X, the heat dissipation efficiency is improved, in addition, the other surface of electric core 5 is attached to expansion cavity 31, and enough expansion space is reserved for electric core 5, and the safety risk of explosion of electric core 5 is reduced.

[0031] In some embodiments, in order to facilitate the installation of the water-cooling plate, referring to Figure 3 , the top of the support 1 is provided with a mounting groove 11, and the first water-cooling plate 2 is arranged in the mounting groove 11. The interface 201 is arranged at the top of the first water-cooling plate 2 and spaced apart in the first direction X and the second direction Y. In order to ensure the sealing of the first water-cooling plate 2 and the second water-cooling plate 4 at the interface 201 and avoid the overflow of the cooling liquid, a sealing groove 203 is arranged at the top of the interface 201. Meanwhile, the water-cooling pipes 41 are arranged spaced apart in the second direction Y, and the lower end of the water-cooling pipes 41 is sleeved with a sealing ring 42 corresponding to the sealing groove 203, so as to realize the sealing. Further, in order to facilitate the processing of the assembly 3, the cross section of the assembly 3 in the first direction X is U-shaped. In order to facilitate the limiting of the assembly 3 and the second water-cooling plate 4 when they are connected, referring to Figure 2 、 Figure 4 , the top of the assembly 3 is provided with a limiting step 32 facing the first water-cooling plate 2. One end face of the second water-cooling plate 4 in the first direction X is partially extended outward to form the water-cooling pipes 41. When the first water-cooling plate 2 and the second water-cooling plate 4 are installed, the water-cooling pipes 41 are arranged in the expansion cavity 31, and the top outer wall of the water-cooling pipes 41 abuts against the limiting step 32, so as to limit the second water-cooling plate 4 in the vertical direction and prevent the second water-cooling plate 4 from being pulled out. Further, in order to reduce the production cost of the soft-pack battery and have a better heat dissipation effect, the first water-cooling plate 2 and the second water-cooling plate 4 are both made of aluminum alloy material.

[0032] Further, in the present embodiment, in order to facilitate the arrangement of the mounting groove 11, the interface 201 and the sealing groove 203, the shapes of the mounting groove 11, the interface 201 and the sealing groove 203 are rectangular, and the shape of the internal passage of the water-cooling pipes 41 is also rectangular. The shape can be adaptively adjusted according to the actual design requirements.

[0033] In some embodiments, in order to facilitate the connection between the support 1 and the assembly 3, referring to Figures 1 to 4 , the support 1 and the assembly 3 are directly connected by buckling. Specifically, the top of the support 1 is provided with a clamping portion 12 spaced apart in the first direction X and the second direction Y. Meanwhile, the opposite two side walls of the assembly 3 are provided with clamping grooves 33 corresponding to the clamping portion 12 in the second direction Y. Further, the cross section of the clamping groove 33 in the second direction Y is T-shaped, and the shape of the clamping portion 12 corresponds to the shape of the clamping groove 33.

[0034] In some embodiments, in order to facilitate the injection of the cooling liquid into the water-cooling cavity 200, the cooling liquid can be mixed by water and ethylene glycol, referring to Figure 2The utility model discloses soft package battery still includes sealing cover 23, and the top of first water cooling plate 2 is provided with the liquid injection hole that communicates with water cooling cavity 200, and the liquid injection hole is connected with sealing cover 23, in some preferred embodiments, the liquid injection hole is connected with sealing cover 23 using thread, in order to improve the sealing effect of sealing cover 23, the connecting place of sealing cover 23 and liquid injection hole can be daubed waterproof glue. In some other implementations, sealing cover 23 can be made of rubber or silicone and other materials, and is sealed by interference fit with the liquid injection hole.

[0035] In some embodiments, in order to facilitate the processing of the water cooling cavity 200 inside the first water cooling plate 2, referring to Figure 5 , the first water cooling plate 2 includes a plate body 21 and a sealing plate 22, the inside of the plate body 21 is provided with a water cooling cavity 200, the top of the plate body 21 is provided with an interface 201, one end of the plate body 21 is provided with an opening 202, and the sealing plate 22 is arranged at the opening 202, and the other end of the sealing plate 22 abuts against the inner wall of the mounting groove 11. Further, in order to ensure the sealing effect of the sealing plate 22 at the opening 202, the sealing plate 22 and the plate body 21 are fixed by welding.

[0036] In some embodiments, in order to further improve the heat dissipation efficiency of the battery cell 5, the top of the assembly 3 is provided with a heat dissipation hole 34 along the second direction Y. Further, in order to facilitate the series connection between the battery cells 5, the top of the battery cell 5 is provided with a positive plate 51 and a negative plate 52 along the second direction Y.

[0037] The working process of the utility model is as follows: the first water cooling plate 2 is installed on the support 1, the water cooling pipe 41 on the second water cooling plate 4 is connected with the interface 201 on the first water cooling plate 2, so that the water cooling pipe 41 communicates with the water cooling cavity 200, then the assembly 3 is clamped with the support 1, the limiting step 32 on the assembly 3 abuts against the top outer wall of the water cooling pipe 41, the second water cooling plate 4 is fixed, and then the soft package battery is inserted between the adjacent assembly 3 and the second water cooling plate 4.

[0038] In summary, the utility model embodiment provides a kind of soft package battery, is provided with first water cooling plate 2, assembly 3 and second water cooling plate 4, when battery cell 5 is installed, battery cell 5 is arranged between adjacent assembly 3 and second water cooling plate 4, one end surface of battery cell 5 is arranged in second water cooling plate 4 in the first direction X, and the other end surface is arranged in expansion cavity 31, and the bottom of battery cell 5 is attached to the top surface of first water cooling plate 2. Expansion cavity 31 is arranged on assembly 3, and one end surface of expansion cavity 31 is arranged in battery cell 5, enough expansion space is reserved, and the safety risk of explosion of battery cell 5 is reduced. In addition, the bottom of battery cell 5 is cooled by first water cooling plate 2, and one end surface of battery cell 5 is cooled by second water cooling plate 4, the heat dissipation area of battery cell 5 is increased, and the heat dissipation effect is improved.

[0039] The above merely is the preferred implementation form of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A pouch battery having a first direction and a second direction that each perpendicularly intersect, characterized by: The support, the first water-cooled plate, the plurality of combination assemblies, the plurality of second water-cooled plates, and the plurality of electric cores; The first water-cooled plate is arranged on the top of the support, and a water-cooled cavity is arranged in the first water-cooled plate. The plurality of combination assemblies are connected with the support and are arranged at intervals along the first direction, and an expansion cavity is arranged in the middle of the combination assembly. The plurality of second water-cooled plates are connected with the support and are arranged at intervals along the first direction, and the second water-cooled plate is arranged between two adjacent combination assemblies. The electric core is arranged between the adjacent combination assembly and the second water-cooled plate, and one end surface of the electric core is arranged in abutment with the second water-cooled plate along the first direction, and the other end surface is arranged in abutment with the expansion cavity.

2. The pouch battery of claim 1, wherein: The top of the support is provided with a mounting groove, and the first water-cooled plate is arranged in the mounting groove.

3. The pouch battery of claim 2, wherein: The top of the first water-cooled plate is provided with the interface along the first direction and the second direction, the top of the interface is provided with a sealing groove, and the water-cooled pipeline is arranged at intervals along the second direction.

4. The pouch battery of claim 3, wherein: The cross section of the combination assembly along the first direction is U-shaped, the top of the combination assembly is provided with a limiting step facing the first water-cooled plate, and one end surface of the second water-cooled plate partially extends outward along the first direction to form the water-cooled pipeline.

5. The pouch battery of claim 4, wherein: The top of the support is provided with a clamping portion along the first direction and the second direction, and the clamping groove corresponding to the clamping portion is arranged in the two opposite side walls of the combination assembly along the second direction.

6. The pouch battery of claim 2, wherein: The cross section of the clamping groove along the second direction is T-shaped.

7. The pouch battery of claim 1, wherein: The first water-cooled plate comprises a plate body and a sealing plate, the inside of the plate body is provided with the water-cooled cavity, the top of the plate body is provided with the interface, one end of the plate body is open, and the sealing plate is arranged at the opening.

8. The pouch battery of claim 1, wherein: The top of the combination assembly is provided with a heat dissipation hole along the second direction.

9. The pouch battery of claim 1, wherein: The top of the electric core is provided with a positive plate and a negative plate along the second direction.

10. The pouch battery of claim 1, wherein: The first water-cooled plate is made of aluminum alloy material. The first water-cooled plate and the second water-cooled plate are made of aluminum alloy material.

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