CN219086169U - Battery system of integrated cylinder electricity core - Google Patents

Abstract

The utility model discloses a battery system of an integrated cylindrical cell, which comprises: the battery box, be fixed with at least one electric core setting element on the bottom plate of battery box, electric core setting element includes a plurality of recesses of matrix arrangement, and a single cylinder electric core is fixed to vertical in every recess, beats between single cylinder electric core and the recess to glue fixedly. According to the utility model, an integration mode of the battery core-module-battery pack is omitted, and the battery core is directly fixed in the battery box body, so that the number of parts is reduced, and the space utilization rate of the battery box body is improved; each cylindrical cell is arranged in a matrix through the cell locating piece, and compared with the traditional cell staggered arrangement mode, the safety gap between the cells can be increased, so that the heat spreading risk of the cells in thermal runaway is reduced.

Description

Battery system of integrated cylinder electricity core

Technical Field

The utility model relates to the technical field of electric automobile power batteries, in particular to a battery system integrated with a cylindrical battery cell.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

In the prior art, most battery packs of electric automobile host factories are integrated in a battery core-module-battery pack integrated mode, and the safety of the battery is guaranteed in a multi-level grouping mode, but the space utilization rate and the energy density of the battery packs are sacrificed.

Currently, the types of cells are generally classified into cylindrical, square and soft-pack cells; the cylindrical battery cell is used as a power source of the new energy electric automobile, and is commonly selected in the current electric automobile; however, the single capacity of the cylindrical battery cell is low, so that the integration quantity is high, parts required by the battery pack are also high, and the space utilization rate of the battery pack is low; in addition, the gaps between the battery cells may be changed due to the weak fixation of the single battery cells, which affects the safety performance of the battery.

Disclosure of Invention

In order to solve the above problems, the utility model provides a battery system integrated with a cylindrical battery cell, wherein the battery cell is directly fixed in a battery box, the cylindrical battery cell adopts a matrix arrangement mode, and the battery cell is secondarily limited and fixed, so that the space utilization rate of the battery box can be improved, and the safety performance of the battery can be improved.

In some embodiments, the following technical scheme is adopted:

a battery system integrating cylindrical cells, comprising: the battery box, be fixed with at least one electric core setting element on the bottom plate of battery box, electric core setting element includes a plurality of recesses of matrix arrangement, and a single cylinder electric core is fixed to vertical in every recess, beats between single cylinder electric core and the recess to glue fixedly.

As a further scheme, the size of the groove is matched with the size of the cylindrical battery cell.

As a further scheme, the box bottom plate is pre-embedded with the rivet nut, the corresponding position on the battery cell positioning piece is perforated, and the bolt passes through the perforation on the battery cell positioning piece and is matched with the rivet nut on the box body, so that the box bottom plate and the battery cell positioning piece are fixed.

As a further proposal, a layer of heat-conducting glue is arranged on the bottom plate of the battery box body.

As a further scheme, the dimensions of the cylindrical battery cell satisfy: the diameter is larger than 60mm, and the height is larger than 120mm.

As a further solution, the bus bars are arranged on top of all the cylindrical cells.

As a further proposal, the top of the busbar is provided with a plastic insulating layer.

As a further scheme, the battery cell positioning piece is manufactured in an injection molding mode.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, an integration mode of the battery core-module-battery pack is omitted, and the battery core is directly fixed in the battery box body, so that the number of parts is reduced, and the space utilization rate of the battery box body is improved; each cylindrical cell is arranged in a matrix through the cell locating piece, and compared with the traditional cell staggered arrangement mode, the safety gap between the cells can be increased, so that the heat spreading risk of the cells in thermal runaway is reduced.

(2) According to the utility model, each cylindrical battery cell is vertically fixed in the battery cell positioning piece, and secondary fixation is performed in a glue spraying manner, so that the fixation strength of single cylindrical battery cells can be ensured, the gaps among the battery cells are always kept consistent, and the use safety of the battery is improved.

(3) The single cylindrical battery cell is a large-size battery cell, the diameter of the battery cell is large, and the number of bus bars can be reduced; the height of the battery cell is high, and the capacity of the battery cell can be increased to a certain extent.

Additional features and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a battery system with an integrated cylindrical cell according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a positioning member of a battery cell according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a matrix arrangement of cylindrical cells in an embodiment of the present utility model;

fig. 4 is a schematic view of a bottom plate structure of a battery box according to an embodiment of the present utility model;

the battery comprises a battery cell (1), a battery cell positioning piece (2), a bottom plate of a battery box body (3), heat conducting glue (4), an insulating layer (5), a busbar (6), a groove (7), a rivet nut (8) and a bolt (9).

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Example 1

In one or more embodiments, a battery system integrating cylindrical cells is disclosed, in combination with fig. 1 and 2, specifically comprising: the battery box body, the bottom plate 3 of the battery box body is fixed with at least one electric core positioning piece 2; a plurality of grooves 7 are arranged on the cell positioning piece 2 in a matrix manner, a single cylindrical cell 1 is vertically fixed in each groove 7, and glue is applied between the single cylindrical cell 1 and the grooves 7 for fixation.

In this embodiment, referring to fig. 4, a rivet nut 8 is pre-embedded on the bottom plate 3 of the battery box body, the corresponding position on the battery cell positioning member 2 (i.e., the gap between two rows of battery cells) is perforated, the rivet nut 8 pre-embedded on the box body is coaxially matched with the perforation of the battery cell positioning member 2, and finally, a bolt 9 passes through the battery cell positioning hole to be matched with the rivet nut 8 on the box body, so as to fix the battery cell positioning member 2 and the bottom plate 3 of the battery box body.

In addition, a layer of heat conducting glue 4 is further arranged on the bottom plate 3 of the battery box body and used for achieving good heat transfer effect when the battery cells are heated at low temperature.

In this embodiment, with reference to fig. 2 and 3, all the cylindrical battery cells 1 are arranged in a matrix; the structure of the groove 7 of the cell positioning piece 2 can carry out primary limit on the cell, then the cell is pre-fixed by utilizing the structural adhesive in the groove 7, and the gel carries out secondary limit and fixation on the cell 1; the battery cell 1 does not rotate during module welding, the module welding reliability is improved, the fixed strength of the single cylindrical battery cell 1 is ensured, the gaps among the battery cells are always kept consistent, and the use safety of the battery is improved; meanwhile, the electric core positioning piece is used for fixing the electric core, and meanwhile, the improvement of the overall structural strength of the module is greatly facilitated.

In the embodiment, the cell positioning piece 2 is manufactured in an injection molding mode according to the size of the cell, and the cell box body adopts an aluminum profile structure to increase the whole package strength; the size of the groove 7 on the cell positioning piece 2 is matched with the size of the cylindrical cell 1, and the structure of the cell positioning piece in the embodiment can adapt to the cylindrical cell with larger size, the diameter of the cell is large, and the number of buses can be reduced; the height of the battery cell is high, so that the capacity of the battery cell can be increased to a certain extent; as a specific example, the dimensions of the cylindrical battery cell of this embodiment satisfy: the diameter is larger than 60mm, and the height is larger than 120mm.

In this embodiment, the battery system bus bars 6 are all concentrated at the top of the battery cells, and the battery cells are connected by bus bar welding to form a loop, so as to realize charging and discharging of the whole package. An insulating layer 5 of a plastic piece is arranged on the top of the busbar 6 for insulation; and then the high-low voltage wire bundles are installed according to the whole package requirement, and the high-integration battery system is assembled.

According to the embodiment, an integration mode of the battery core-module-battery pack is omitted, the battery core is directly fixed in the battery box body, the number of parts is reduced, and the space utilization rate of the battery box body is improved; each cylindrical cell is arranged in a matrix through the cell locating piece, and compared with the traditional cell staggered arrangement mode, the safety gap between the cells can be increased, so that the heat spreading risk of the cells in thermal runaway is reduced.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.

Claims (8)

1. A battery system incorporating a cylindrical cell, comprising: the battery box, be fixed with at least one electric core setting element on the bottom plate of battery box, electric core setting element includes a plurality of recesses of matrix arrangement, and a single cylinder electric core is fixed to vertical in every recess, beats between single cylinder electric core and the recess to glue fixedly.

2. A battery system incorporating a cylindrical cell as claimed in claim 1, wherein the dimensions of the recess are adapted to the dimensions of the cylindrical cell.

3. The battery system of claim 1, wherein the rivet nut is pre-embedded on the bottom plate of the battery box, the corresponding position on the cell positioning piece is perforated, and the bolt passes through the perforation on the cell positioning piece and cooperates with the rivet nut on the box to fix the bottom plate of the box and the cell positioning piece.

4. A battery system incorporating a cylindrical cell as claimed in claim 3, wherein the base plate of the battery housing is provided with a layer of heat conductive glue.

5. The battery system of claim 1, wherein the cylindrical cells are sized to: the diameter is larger than 60mm, and the height is larger than 120mm.

6. A battery system incorporating a cylindrical cell as claimed in claim 1, wherein the buss bars are provided on top of all the cylindrical cells.

7. The battery system of claim 6, wherein the bus bar top is provided with a plastic insulating layer.

8. The battery system of claim 1, wherein the cell positioning member is injection molded.

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