CN219575791U - Layout structure of multilayer power battery box - Google Patents

Abstract

The utility model relates to a layout structure of a multilayer power battery box, which comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are mechanically connected to form a closed cavity for placing a multilayer battery cell assembly, and the layout structure is different from the prior art and further comprises: the battery cell module comprises a liquid cooling system, a battery cell bracket, a fixed bracket assembly and a connecting bolt assembly, wherein the liquid cooling system is arranged in the fixed bracket assembly and is detachably and mechanically connected with the battery cell bracket and the fixed bracket assembly through the connecting bolt assembly; the liquid cooling system comprises at least one liquid cooling sheet and a connecting pipe, wherein the cooling cavities of the liquid cooling sheets are communicated through the connecting pipe, a first fixing support and a second fixing support in the fixing support assemblies are matched for use and fixedly placed with two layers of electric core assemblies, and the liquid cooling sheet is placed between the two layers of electric core assemblies. The utility model has reasonable structural design, good cooling effect, high modularization and integration degree and good maintainability, and the liquid cooling system with the cooling cavity and the diversion groove improves the safety and the reliability.

Description

Layout structure of multilayer power battery box

Technical Field

The utility model belongs to the technical field of new energy automobile manufacturing, and relates to a multilayer power battery box layout structure.

Background

With the rapid development of new energy automobile manufacturing technology, the application of power batteries in new energy automobiles is more and more popular, with the continuous improvement of new energy automobile endurance requirements, the continuous increase of the number and energy density requirements on power batteries is carried out, and vehicle accidents caused by spontaneous combustion of the power batteries are frequent, in the prior art, overheating of a power battery shell is one of the important factors causing spontaneous combustion of the power batteries, especially for multi-layer power batteries, the arrangement and the position fixing of a multi-layer battery cell assembly are particularly important factors to be considered, and the arrangement and the cooling of the power battery shell are often required to be further optimally designed according to actual requirements, so that a novel power battery shell structure suitable for the multi-layer battery cell assembly is required to solve the problems.

Disclosure of Invention

The utility model aims to provide a multilayer power battery box layout structure, which solves the problems of cooling and layout arrangement of a multilayer power battery shell by utilizing a liquid cooling system with a cooling cavity and a shunt groove and a fixed bracket assembly, has good reliability and safety, and effectively meets the specific requirements of users.

To achieve the above object, an embodiment of the present utility model provides a layout structure of a multi-layer power battery box, including an upper housing, a lower housing, and a battery cell assembly, where the upper housing and the lower housing are mechanically connected to form a sealed cavity for placing multiple layers of the battery cell assembly, unlike the prior art, the layout structure of the multi-layer power battery box further includes: the liquid cooling system is arranged in the fixed support assembly and is detachably and mechanically connected with the battery cell support and the fixed support assembly through the connecting bolt assembly to realize the position fixation of the liquid cooling system; the liquid cooling system comprises at least one liquid cooling sheet and a connecting pipe, wherein a plurality of liquid cooling sheets are communicated through the connecting pipe and used for cooling liquid to circulate and cool, the fixing support assembly comprises at least one first fixing support, at least one second fixing support and at least one third fixing support, the third fixing support is mechanically connected with the first fixing support and the second fixing support and used for achieving position fixing of the first fixing support and the second fixing support, and the first fixing support and the second fixing support are matched for use and fixedly placing two layers of battery cell assemblies, wherein one liquid cooling sheet is placed between every two layers of battery cell assemblies.

Further, the liquid cooling piece is used for installing the coolant liquid for the cavity structure additional, the liquid cooling piece is provided with cooling chamber, splitter box, the splitter box sets up the surface of liquid cooling piece is used for the coolant liquid reposition of redundant personnel.

Further, the liquid cooling system further comprises a cooling liquid inlet and a cooling liquid outlet, wherein the cooling liquid inlet and the cooling liquid outlet are arranged on the connecting pipe and are exposed out of the lower shell for realizing the in-out circulation of cooling liquid.

Further, the fixing bracket assembly further comprises at least one of a fourth fixing bracket, at least one of a fifth fixing bracket and at least one of a sixth fixing bracket, and the fourth fixing bracket, the fifth fixing bracket and the sixth fixing bracket are respectively and mechanically connected with the lower shell to realize the installation and fixation of the fixing bracket assembly.

Preferably, the method further comprises: the buffer cushion is arranged at the contact surface position of the first fixing support and the second fixing support.

Further, the cushion pad is an elastic material.

Preferably, the two sides of the fixed bracket component are respectively provided with a filling block for realizing buffer fixation of the fixed bracket component.

The utility model relates to a layout structure of a multilayer power battery box, which has the beneficial effects that: the utility model has reasonable structural design, good cooling effect, convenient replacement and good maintainability, and the fixed bracket component realizes modularization and integration; the liquid cooling system with the cooling cavity and the shunt grooves realizes good cooling effect on the multi-layer power battery shell, and the buffer cushion and the filling block improve the stress buffering effect of the battery shell.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present utility model and are not limiting of the present utility model.

Fig. 1 is an exploded view of a layout structure of a multi-layered power battery case according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of a layout structure of a multi-layered power battery case according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an arrangement of battery cell components according to an embodiment of the present utility model;

fig. 4 is a schematic perspective view of a fixing bracket assembly according to an embodiment of the present utility model;

FIG. 5 is an enlarged partial schematic view of portion A of FIG. 4;

FIG. 6 is a schematic diagram of a three-dimensional structure of a liquid cooling system according to an embodiment of the present utility model;

FIG. 7 is a top view of a liquid cooling system according to an embodiment of the present utility model;

fig. 8 is a partial cross-sectional view of a liquid cooling system according to an embodiment of the present utility model.

In the figure:

1. an upper housing; 11. a first cavity; 2. a lower housing; 21. a second cavity; 3. a liquid cooling system; 31. a connecting pipe; 32. a liquid cooling sheet; 321. a cooling chamber; 322. a shunt channel; 33. a cooling liquid inlet; 34. a cooling liquid outlet; 4. a cell holder; 5. a fixed bracket assembly; 51. a first fixing bracket; 52. a second fixing bracket; 53. a third fixing bracket; 54. a fourth fixing bracket; 55. a fifth fixing bracket; 56. a sixth fixed bracket; 6. a cushion pad; 7. a connecting bolt assembly; 8. a cell assembly; 9. and filling the blocks.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. It should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 terms in the utility model will be understood by those of ordinary skill in the art in a specific context.

A layout structure of a multi-layered power battery case according to an embodiment of the present utility model will be described in detail with reference to the accompanying drawings.

Examples

Fig. 1 is an exploded view showing a layout structure of a multi-layered power battery case according to an embodiment of the present utility model; fig. 2 is a schematic perspective view showing a layout structure of a multi-layered power battery case according to an embodiment of the present utility model; fig. 3 shows a schematic arrangement of a battery cell assembly according to an embodiment of the present utility model; fig. 4 is a schematic perspective view of a fixing bracket assembly according to an embodiment of the present utility model; FIG. 5 shows an enlarged partial schematic view of portion A of FIG. 4; fig. 6 shows a schematic diagram of a three-dimensional structure of a liquid cooling system according to an embodiment of the present utility model; FIG. 7 illustrates a top view of a liquid cooling system provided by an embodiment of the present utility model; fig. 8 shows a partial cross-sectional view of a liquid cooling system according to an embodiment of the present utility model. As shown in fig. 1 to 8, the layout structure of a multi-layer power battery box provided in the embodiment of the present utility model includes an upper housing 1, a lower housing 2, and a battery cell assembly 8, where the upper housing 1 and the lower housing 2 are mechanically connected, a first cavity 11 on the upper housing 1 and a second cavity 21 on the lower housing 2 together form a sealed cavity for placing the multi-layer battery cell assembly 8, where the number of layers of the battery cell assembly 8 is generally greater than two, unlike the prior art, the layout structure of a multi-layer power battery box provided in the embodiment of the present utility model further includes: the liquid cooling system 3, the battery cell support 4, the fixed support assembly 5 and the connecting bolt assembly 7, specifically, the liquid cooling system 3 is arranged in the fixed support assembly 5 and is detachably and mechanically connected with the battery cell support 4 and the fixed support assembly 5 through a plurality of connecting bolt assemblies 7 for realizing the position fixation; the cell support 4 is used for regularly arranging a plurality of cells and fixing the cells, the cell support 4 and the regularly arranged cells form a multi-layer cell assembly 8 together, in fig. 1, an arrangement layout diagram of six layers of cell assemblies 8 is shown in the embodiment of the utility model, and the liquid cooling system 3 is mechanically connected and fixed with the cell support 4 and the fixing support assembly 5 by using a plurality of connecting bolt assemblies 7. Specifically, the liquid cooling system 3 includes at least one liquid cooling sheet 32 and a connecting pipe 31, the plurality of liquid cooling sheets 32 are communicated through the connecting pipe 31 for circulating cooling of the cooling liquid, taking the embodiment provided by the utility model as an example, fig. 6 shows a structural form of the liquid cooling system 3, wherein the liquid cooling system 3 includes three liquid cooling sheets 32, the three liquid cooling sheets 32 realize communication among different liquid cooling sheets 32 through the connecting pipe 31, so that circulating flow of the cooling liquid is conveniently realized, and cooling effect on the multi-layer battery cell assembly 8 is enhanced; the fixing bracket assembly 5 comprises at least one of a first fixing bracket 51, at least one of a second fixing bracket 52 and at least one of a third fixing bracket 53, and the third fixing bracket 53 is mechanically connected with the first fixing bracket 51 and the second fixing bracket 52 for realizing the position fixing of the first fixing bracket 51 and the second fixing bracket 52, wherein each first fixing bracket 51 is matched with each second fixing bracket 52, namely, one first fixing bracket 51, one second fixing bracket 52 and one third fixing bracket 53 are matched with each other, and two layers of cell assemblies 8 are fixedly arranged by utilizing the cell bracket 4, so that each two layers of cell assemblies 8 are formed into a relatively independent module, and later maintenance is facilitated; the layout structure of the multi-layer power battery box provided by the embodiment of the utility model further comprises: in the embodiment provided by the utility model, six layers of battery cell assemblies 8 are divided into three modules by utilizing the first fixing support 51 and the second fixing support 52, the first fixing support 51 and the second fixing support 52 are mechanically connected through a plurality of connecting bolt assemblies 7, and one liquid cooling piece 32 is arranged between every two layers of battery cell assemblies 8, so that each layer of battery cell assemblies 8 can be in close contact with the liquid cooling piece 32, the battery cell assemblies 8 can be physically cooled by low-temperature cooling liquid in the liquid cooling piece 32, and the heat in the battery shell is taken away by circulating flow of the cooling liquid, so that a good cooling effect on the whole battery shell is realized.

In the layout structure of the multi-layer power battery box provided by the embodiment of the utility model, the liquid cooling sheet 32 is of a cavity structure for adding cooling liquid, wherein the liquid cooling sheet 32 is provided with the cooling cavity 321 and the diversion groove 322, and the diversion groove 322 is arranged on the outer surface of the liquid cooling sheet 32 for diversion of the cooling liquid, so that the strength and the rigidity of the liquid cooling sheet 32 are increased, the heat dissipation area is increased, and the heat dissipation effect is improved; the cooling chambers 321 of the plurality of liquid cooling fins 32 are communicated by the connecting pipe 31, so that the circulation flow of the cooling liquid in the liquid cooling system 3 is realized. In order to realize the communication with an external cooling system and realize the circulation of cooling liquid, the liquid cooling system 3 further comprises a cooling liquid inlet 33 and a cooling liquid outlet 34, the cooling liquid inlet 33 and the cooling liquid outlet 34 are arranged on the connecting pipe 31 and are exposed out of the outer surface of the lower shell 2 for realizing the in-out circulation of the cooling liquid, the connecting pipe 31 is fixed on the lower shell 2 through connecting pieces at the positions of the cooling liquid inlet 33 and the cooling liquid outlet 34, the cooling liquid inlet 33 and the cooling liquid outlet 34 are exposed out of the outer surface of the lower shell 2, and the external cooling system is connected through corresponding connecting pipelines, so that the circulation flow of the cooling liquid in the liquid cooling system 3 is realized, the cooling and the cooling of the battery shell are realized by using the liquid cooling system 3, the internal temperature of the battery shell is reduced, the spontaneous combustion risk caused by heat accumulation in the battery shell is reduced, and the safety of the battery shell is improved.

In the layout structure of the multi-layer power battery box provided by the embodiment of the utility model, the fixing support assembly 5 further comprises at least one of the fourth fixing support 54, at least one of the fifth fixing support 55 and at least one of the sixth fixing support 56, and the fourth fixing support 54, the fifth fixing support 55 and the sixth fixing support 56 are respectively and mechanically connected with the lower shell 2 for realizing the installation and fixation of the fixing support assembly 5, so that the shaking of the fixing support assembly 5 and the battery cell assembly 8 in the shell caused by external force is reduced, and the stability and reliability of the battery shell are improved.

In the layout structure of the multi-layer power battery box provided by the embodiment of the utility model, the filling blocks 9 are respectively arranged at the two sides of the fixed support assembly 5 for realizing the buffer fixation of the fixed support assembly 5, the quantity and the shape of the filling blocks 9 can be set and adjusted according to the requirements of users and spaces, the filling blocks 9 are utilized for filling the cavities between the fixed support assembly 5 and the upper shell 1 and the lower shell 2, the stress buffer effect of the battery shell in the horizontal direction is enhanced, the shaking amplitude of the fixed support assembly 5 is greatly reduced, and the stability and the reliability of the battery shell are improved.

In the layout structure of the multi-layered power battery case provided in the embodiment of the present utility model, it is preferable that the cushion pad 6 and the filling block 9 are made of elastic materials, such as foam, rubber, etc., including but not limited to the above materials.

It should be noted that, in the embodiment provided by the present utility model, the six-layer battery cell assembly 8 is taken as an example for illustration, when the battery cell assembly 8 has other layers, such as: when the number of layers is four, eight, etc., the corresponding liquid cooling system 3, the fixed support component 5, etc. are simply increased or decreased correspondingly, and the detailed description is omitted. In addition, the power battery in the battery cell assembly 8 is a round battery cell, and of course, other shapes such as square battery cells and the like can be used, and only the battery cell bracket 4 and the like need to be subjected to proper structural improvement, so that the appearance of the battery cell is not particularly limited.

Compared with the prior art, the multilayer power battery box layout structure provided by the utility model has reasonable structural design, good cooling effect, and the fixed bracket component 5 realizes modularization and integration, is convenient to replace and has good maintainability; the liquid cooling system 3 with the cooling cavity 321 and the diversion grooves 322 realizes good cooling effect on the multi-layer power battery shell, the arrangement of the buffer cushion 6 and the filling blocks 9 improves the stress buffering effect of the battery shell, the safety and the reliability of the utility model are high, and the specific requirements of users on the multi-layer power battery shell are met.

The following points need to be described:

(1) Unless otherwise defined, like reference numerals refer to like meanings in the embodiments of the utility model and the figures.

(2) The drawings of the embodiments of the present utility model relate only to the structures related to the embodiments of the present utility model, and other structures may refer to the general designs.

(3) In the drawings for describing embodiments of the present utility model, some of the structures in the drawings may be exaggerated or reduced for clarity, i.e., the drawings are not drawn to actual scale.

(4) The embodiments of the utility model and the features of the embodiments can be combined with each other to give new embodiments without conflict.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a multilayer power battery box layout structure, includes casing (1), lower casing (2), electric core subassembly (8), go up casing (1) with lower casing (2) carry out mechanical connection and form airtight cavity and be used for placing the multilayer electric core subassembly (8), its characterized in that still includes: the liquid cooling system (3), the battery cell support (4), the fixed support assembly (5) and the connecting bolt assembly (7), wherein the liquid cooling system (3) is arranged in the fixed support assembly (5) and is detachably and mechanically connected with the battery cell support (4) and the fixed support assembly (5) through the connecting bolt assembly (7) to realize the position fixation of the battery cell support; the liquid cooling system (3) comprises at least one liquid cooling sheet (32) and a connecting pipe (31), wherein a plurality of liquid cooling sheets (32) are communicated through the connecting pipe (31) and used for cooling liquid circulation, the fixed support component (5) comprises at least one first fixed support (51), at least one second fixed support (52) and at least one third fixed support (53), the third fixed support (53) is mechanically connected with the first fixed support (51) and the second fixed support (52) and used for achieving the position fixation of the first fixed support (51) and the second fixed support (52), the first fixed support (51) and the second fixed support (52) are matched for use and are fixedly provided with two layers of battery cell components (8), and one liquid cooling sheet (32) is arranged between every two layers of battery cell components (8).

2. The multilayer power battery box layout structure according to claim 1, wherein the liquid cooling sheet (32) is of a cavity structure for adding cooling liquid, the liquid cooling sheet (32) is provided with a cooling cavity (321) and a diversion groove (322), and the diversion groove (322) is arranged on the outer surface of the liquid cooling sheet (32) and used for diversion of the cooling liquid.

3. The multilayer power battery case layout structure according to claim 2, wherein the liquid cooling system (3) further comprises a cooling liquid inlet (33) and a cooling liquid outlet (34), and the cooling liquid inlet (33) and the cooling liquid outlet (34) are arranged on the connecting pipe (31) and are exposed to the lower housing (2) for realizing the in-out circulation of cooling liquid.

4. A multi-layered power battery case layout structure according to any one of claims 1-3, wherein the fixing bracket assembly (5) further comprises at least one of a fourth fixing bracket (54), at least one of a fifth fixing bracket (55), and at least one of a sixth fixing bracket (56), and the fourth fixing bracket (54), the fifth fixing bracket (55), and the sixth fixing bracket (56) are mechanically connected with the lower case (2) respectively for achieving the mounting fixation of the fixing bracket assembly (5).

5. The multi-layered power cell cartridge layout structure according to claim 4, further comprising: and the buffer cushion (6) is arranged at the contact surface position of the first fixed support (51) and the second fixed support (52).

6. The multi-layered power cell cartridge layout structure according to claim 5, wherein the cushion pad (6) is an elastic material.

7. The multilayer power battery box layout structure according to claim 1, wherein two sides of the fixed bracket assembly (5) are respectively provided with filling blocks (9) for realizing buffer fixation of the fixed bracket assembly (5).