CN218769973U - Battery pack and automobile - Google Patents

Abstract

The utility model discloses a battery pack and an automobile, wherein the battery pack comprises a tray, the tray comprises a bottom plate and a frame, and the frame is arranged around the bottom plate to surround and form an accommodating space; a plurality of electric core pile bodies, the electric core pile body extends along the first direction, and a plurality of electric core pile bodies arrange side by side in the accommodation space along the second direction, and the electric core pile body is power take off end along the one end of first direction, and a plurality of power take off ends set up coplanarly; the connecting copper bar is used for electrically connecting the power output ends of the battery cell stacking bodies adjacent to each other; the frame includes the first boundary beam that the face was arranged towards power take off, forms between this first boundary beam and the power take off and dodges the space, connects the copper bar and arranges in dodging the space. Through adopting above design, can set up the connection copper bar in the lateral part of the electric core stack body and not the top of the electric core stack body. Therefore, the height occupation of the battery pack is reduced, and the overall volume of the battery pack is reduced.

Description

Battery pack and automobile

Technical Field

The utility model relates to a battery package field, in particular to battery package and car.

Background

The battery pack is an important part in the new energy automobile and is used for supplying power to a motor of the automobile.

Fig. 8 and 9 show a conventional battery pack, which has a plurality of side-by-side cell stack 2, the output end of the cell stack is provided with a high-voltage output copper bar 1 corresponding to the positive output and the negative output, and the battery pack further has a connecting copper bar 3 connecting two adjacent cell stacks in series, and the connecting copper bar 3 is correspondingly disposed on the top of the battery pack.

The above solution has the following disadvantages: because the connecting copper bar 3 protrudes out of the top of the battery pack, the battery pack occupies space in the height direction, so that the overall occupied volume of the battery pack is increased, and the space utilization rate is low.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a battery package and car in order to overcome the defect that current battery package occupies bulky, space utilization is low.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

a battery pack, comprising:

the tray comprises a bottom plate and a frame, and the frame is arranged around the periphery of the bottom plate to surround and form an accommodating space;

the battery cell stacking body extends along a first direction, the battery cell stacking body is arranged in the accommodating space side by side along a second direction, the first direction is vertical to the second direction, one end of the battery cell stacking body along the first direction is a power output end, and the power output ends are arranged in a coplanar manner; and the number of the first and second groups,

the connecting copper bar is used for electrically connecting the power output ends of the battery cell stacking bodies adjacent to each other;

the frame includes the face towards the first boundary beam that power take off end arranged, be equipped with on the first boundary beam towards keeping away from the portion of dodging of power take off end direction indentation, from this dodge the portion with form between the power take off end and dodge the space, the connection copper bar is arranged in dodge in the space.

Through adopting above design, can set up the connection copper bar in the lateral part of electric core pile body and not the top of electric core pile body. Therefore, the height of the battery pack is reduced, and the overall volume of the battery pack is reduced. Set up on this first boundary beam and dodge the space and be in order to hold the connection copper bar on the one hand, on the other hand then is in order to avoid first boundary beam and the connection copper bar contact that is located electric core pile body lateral part, prevents that the battery package electric leakage.

The embodiment also provides an automobile comprising the battery pack.

The utility model discloses an actively advance the effect and lie in:

the copper bar will be connected and the one end of electric core pile body along first direction is located, the copper bar that will be connected sets up in the lateral part of electric core pile body and not the top of electric core pile body. Therefore, the height occupation of the battery pack is reduced, and the overall volume of the battery pack is reduced.

Drawings

Fig. 1 is a partial perspective view of a battery pack;

fig. 2 is a sectional view of a battery pack;

fig. 3 is a partially assembled view of a power output end of the cell stack;

fig. 4 is a partial view of a power output end of the cell stack;

fig. 5 is a partial perspective view of a cell stack in example 1;

fig. 6 is a view showing the arrangement of a plurality of cell stacks in example 1;

fig. 7 is a view showing the arrangement of a plurality of cell stacks in example 2;

fig. 8 is a view showing an arrangement of a plurality of cell stacks in the prior art;

fig. 9 is a view of a single cell stack in the prior art.

Description of reference numerals:

battery pack 10

Cell stack 100

First direction 110

Second direction 120

Third direction 130

Power take off 140

Outer casing 150

Battery cell 160

Tab 161

Temperature sensor 162

First copper bar 170

First attaching section 171

First connecting lug 172

Butt end face 173

Bolt hole 174

Second copper bar 180

Second attaching section 181

Second engaging lug 182

End cap 190

Tray 200

Base plate 210

Frame 220

First side beam 221

Escape part 222

Avoiding space 223

Front beam 224

Connecting copper bar 300

First output copper bar 400

Second output copper bar 500

Detailed Description

The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention.

Example 1

With reference to fig. 1 and 3, the present invention provides a battery pack 10, wherein the battery pack 10 includes a tray 200, a plurality of battery cell stacks 100 and a connecting copper bar 300.

The tray 200 includes a square bottom plate 210 and a frame 220 disposed around the bottom plate 210, so that the frame 220 forms a square receiving space.

The cell stack 100 is each elongated, and a long side thereof extends in a first direction 110 on a horizontal plane, and a short side thereof extends in a second direction 120 on the horizontal plane, the second direction 120 being perpendicular to the first direction 110. A plurality of the cell stacks 100 are arranged side by side in the second direction 120 (i.e., the extending direction of the short side). Thereby enabling a plurality of the cell stack bodies 100 arranged side by side to be arranged to form a square shape. The battery cell stack 100 arranged side by side is placed in the accommodating space.

One end of the battery cell stack 100 in the first direction 110 is a power output end 140, and a plurality of power output ends 140 are arranged in a coplanar manner. The connecting copper bar 300 connects the power output ends 140 of the cell stack bodies 100 adjacent to each other.

Referring to fig. 2, the frame 220 includes a first side beam 221 disposed facing the power takeoff end 140, and the first side beam 221 is provided with an escape portion 222 that is retracted away from the power takeoff end 140, specifically, the escape portion 222 is a recess disposed on the first side beam 221, so that an escape space 223 is formed between the escape portion 222 and the power takeoff end 140. The connecting copper bar 300 is disposed in the avoiding space 223.

By adopting the above design, the connection copper bar 300 may be provided at the side portion of the cell stack body 100 instead of the top portion of the cell stack body 100. Thereby reducing the height of the battery pack 10 and the overall volume of the battery pack 10. The avoidance space 223 is provided in the first side beam 221 to accommodate the connecting copper bar 300, and to prevent the first side beam 221 from contacting the connecting copper bar 300 located on the side of the battery cell stack 100, thereby preventing the battery pack 10 from leaking electricity.

In this embodiment, the avoiding space 223 extends from the top end of the first side beam 221 toward the bottom plate 210 of the tray 200, that is, the recessed portion of the first side beam 221 extends downward from the top end of the first side beam 221, and in this case, the avoiding space 223 is a space surrounded by a line connecting the first side beam 221 and the opposite top corners of the cell stacked body 100, the inner surface of the recessed portion, and the opposite end surfaces of the cell stacked body 100. Adopt such setting can avoid colliding with connection copper bar 300 when putting into frame 220 with electric core stack 100, and it is more convenient to install. Meanwhile, the connecting copper bar 300 is still exposed after the battery cell stacking body 100 is arranged in the frame 220, so that the connecting copper bar 300 is convenient to disassemble, replace and overhaul.

In this embodiment, the plurality of connecting copper bars 300 are located in the same height interval, and the connecting copper bars 300 are located in the height interval of the avoiding space 223. Specifically speaking, the plurality of connecting copper bars 300 are located at the same height, and the plurality of connecting copper bars 300 are arranged at the same height, so that the appearance is more concise, and the installation difficulty is reduced.

In this embodiment, the avoiding space 223 continuously and uninterruptedly extends along the second direction 120, that is, the avoiding portion 222 continuously and uninterruptedly extends along the extending direction of the first side beam 221, which facilitates the manufacturing of the first side beam 221, and also forms a continuous and uninterrupted elongated avoiding space 223 between the first side beam 221 and the power output end 140 of the battery cell stack 100, thereby facilitating the compatibility of the battery packs 10 composed of different specifications and different numbers of battery cell stacks 100, and improving the production efficiency.

Referring to fig. 3 and 4, in this embodiment, the frame 220 further includes a front beam 224 and a rear beam (not shown) disposed opposite to each other, and a second side beam (not shown) opposite to the first side beam 221. The front beam 224, the first edge beam 221, the rear beam, and the second edge beam are sequentially connected end to form the frame 220. The front beam 224 is provided with electrical ports (not shown).

The battery pack 10 further includes a first output copper bar 400 and a second output copper bar 500, the first output copper bar 400 is connected to the power output end 140 of the cell stack 100 along the second direction 120 and near one end of the front beam 224, the second output copper bar 500 is connected to the power output end 140 of the cell stack 100 along the second direction 120 and far from one end of the front beam 224, the first output copper bar 400 extends to the electrical connection port along the gap between the front beam 224 and the cell stack 100, and the second output copper bar 500 extends to the electrical connection port along the gap between the first side beam 221 and the cell stack 100, and the gap between the front beam 224 and the cell stack 100 in sequence. Thereby achieving the power output of the battery pack 10.

With reference to fig. 5 and fig. 6, in the present embodiment, the battery cell stack 100 specifically includes a casing 150, a plurality of battery cells 160, a first copper bar 170, and a second copper bar 180.

One end of the housing 150 along the first direction 110 is the power output end 140, and a plurality of battery cells 160 are disposed in the housing 150 and are connected in series or in parallel. The first copper bar 170 and the second copper bar 180 are correspondingly disposed at the power output end 140 of the casing 150, and are respectively connected to the positive electrode and the negative electrode of the plurality of battery cells 160, so that the electric power of the plurality of battery cells 160 can be output through the first copper bar 170 and the second copper bar 180.

The connecting copper bar 300 connects the first copper bar 170 and the second copper bar 180 that are respectively provided on the adjacent cell stack bodies 100. Thereby achieving series connection between a plurality of the cell stack bodies 100. The first output copper bar 400 and the second output copper bar 500 are respectively connected to the two connecting copper bars 300 at two ends of the second direction 120. Thereby forming a power output path of the battery cell 160, the first copper bar 170/the second copper bar 180, the connecting copper bar 300, the first output copper bar 400/the second output copper bar 500.

In the present embodiment, the plurality of battery cells 160 disposed in the casing 150 are stacked on each other along the third direction 130 perpendicular to the plane in which the first direction 110 and the second direction 120 are located, that is, along the vertical direction. The first copper bar 170 and the second copper bar 180 are respectively connected to the battery cells 160 disposed at two ends of the third direction 130 (i.e., the vertical direction).

The first copper bar 170 comprises a first connecting lug 172 extending along the third direction 130 to a height section of the avoiding space 223, and the second copper bar 180 comprises a second connecting lug 182 extending along the third direction 130 to a height section of the avoiding space 223. The first connecting lug 172 and the second connecting lug 182 have a butt-joint end surface 173 facing the first edge beam 221, and the butt-joint end surface 173 is provided with a bolt hole 174 for butt-joint connection with the connecting copper bar 300 through a bolt.

The first engaging lug 172 and the second engaging lug 182 are preferably located on the same horizontal plane, so as to facilitate the installation of the connecting copper bar 300 and reduce the height and space occupation of the connecting copper bar 300.

In addition, the first connecting lug 172 and the second connecting lug 182 are preferably disposed on two sides of the power output end 140 of the casing 150 along the second direction 120, so that the connecting copper bar 300 can connect two adjacent battery cell stacks 100 in a shorter length, thereby reducing material cost.

In the prior art, the first copper bar 170 and the second copper bar 180 in the battery cell stack 100 are generally arranged in a suspended manner, which causes the following problems: when the battery pack 10 is charged quickly, the first copper bar 170 and the second copper bar 180 do not dissipate heat effectively, which leads to temperature increase and is easy to cause safety risk. To solve the technical problem, in the present embodiment, the first copper bar 170 includes a first attaching section 171 attached to the inner wall of the housing 150, and the second copper bar 180 includes a second attaching section 181 attached to the inner wall of the housing 150. Therefore, the heat of the first copper bar 170 and the second copper bar 180 can be conducted to the housing 150 of the battery cell stack body 100, the heat dissipation effect of the first copper bar 170 and the second copper bar 180 is enhanced, and the safety of the battery pack 10 during quick charging is improved.

In order to prevent the first copper bar 170 and the second copper bar 180 from conducting current to the outer casing 150, which may cause the battery pack 10 to leak current, in the present embodiment, the surfaces of the first attaching section 171 and the second attaching section 181 are provided with insulating layers. Specifically, the insulating layer is insulating varnish coated on the surfaces of the first attaching section 171 and the second attaching section 181. Of course, as an alternative, the first attaching section 171, the second attaching section 181 and the inner wall of the housing 150 may be filled with insulating and heat-conducting material to prevent the current from being conducted to the housing 150.

In this embodiment, the plurality of battery cells 160 are connected in series and parallel via the tab 161, the tab 161 of each battery cell 160 extends along the arrangement direction of the battery cells 160, the first copper bar 170 and the second copper bar 180 are respectively connected to the tabs 161 of the battery cells 160 at two ends of the arrangement direction, the battery cell stack 100 further includes a temperature sensor 162 connected to the tab 161 to monitor the temperature in real time, and when the temperature of the tab 161 exceeds a preset temperature range, an alarm is given or a safety processing mechanism is activated, so as to further improve the safety performance of the battery pack 10.

In this embodiment, the power output end 140 of the casing 150 is open, the battery cell stack 100 further includes an end cap 190 that closes the opening of the power output end 140 of the casing 150, and the end cap 190 is provided with an opening for avoiding the first connecting lug 172 and the second connecting lug 182.

In this embodiment, the cell stack 100 further includes a cold plate disposed between sidewalls of the adjacent casings 150 of the two cell stacks 100, and/or the cold plate is integrated on the casing 150 of the cell stack 100, and/or the cold plate is disposed between two adjacent cells 160 of the cell stack 100. Flowing cooling water is introduced into the cold plate to take away heat of the battery cell 160 and the first copper bar 170 and the second copper bar 180, so that the effect of enhancing heat dissipation is achieved.

In this embodiment, the other end of the housing 150 along the first direction 110 is a water cooling end, and the cold plate has a water inlet and a water outlet extending to the water cooling end. That is, the water inlet and outlet of the cold plate is opposite to the first copper bar 170 and the second copper bar 180, so that the short circuit of the battery pack 10 caused by the contact of the leaked liquid and the copper bars can be avoided when the cold plate leaks, and the safety of the battery pack 10 is improved.

Example 2

As shown in fig. 7, the battery pack 10 provided in example 2 substantially conforms to the battery pack 10 in example 1 in terms of overall layout, and only differs from the arrangement of the cells 160 in the cell stack 100, and the arrangement of the corresponding first copper bar 170, second copper bar 180, and connecting copper bars, as follows:

in the present embodiment, the plurality of battery cells 160 are connected in series and parallel with each other and are arranged side by side along the second direction 120, and the first copper bar 170 and the second copper bar 180 at the power output end 140 of the casing 150 are respectively connected to the battery cells 160 disposed at two ends of the second direction 120.

The first copper bar 170 comprises a first connecting lug 172 positioned in the height section of the avoiding space 223, the second copper bar 180 comprises a second connecting lug 182 positioned in the height section of the avoiding space 223, and the first connecting lug 172 and the second connecting lug 182 are used for butting against the connecting copper bar 300.

The butting end faces 173 of the first and second engaging lugs 172 and 182 are disposed toward the bottom plate 210 of the tray 200, i.e., downward, the butting end faces 173 are provided with bolt holes, and the connecting copper bars 300 are bolted to the butting end faces 173. The connecting copper bar 300 is U-shaped and bent toward the bottom plate 210. To avoid exceeding the evacuation space 223 in height. Through adopting above design, can make the connection copper bar 300 set up in the one end of the first direction 110 of the stack of body 100 of electric core equally, be about to connect the copper bar 300 and set up in the lateral part of the stack of body 100 of electric core and not the top of the stack of body 100 of electric core. Thereby reducing the height of the battery pack 10 and the overall volume of the battery pack 10.

The utility model also provides an automobile, include as embodiment 1 and embodiment 2 battery package 10. The automobile adopting the battery pack 10 can reduce the space occupation ratio of the battery pack 10, thereby indirectly increasing the riding space in the automobile and improving the use experience of the automobile.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims (10)

1. A battery pack, comprising:

the tray comprises a bottom plate and a frame, and the frame is arranged around the periphery of the bottom plate to surround and form an accommodating space;

the battery cell stacking body extends along a first direction, the battery cell stacking body is arranged in the accommodating space side by side along a second direction, the first direction is vertical to the second direction, one end of the battery cell stacking body along the first direction is a power output end, and the power output ends are arranged in a coplanar manner; and the number of the first and second groups,

the connecting copper bar is used for electrically connecting the power output ends of the battery cell stacking bodies adjacent to each other;

the frame includes the face towards the first boundary beam that power take off end arranged, be equipped with on the first boundary beam towards keeping away from the portion of dodging of power take off end direction indentation, from this dodge the portion with form between the power take off end and dodge the space, the connection copper bar is arranged in dodge in the space.

2. The battery pack according to claim 1, wherein: the plurality of connecting copper bars are positioned in the same height interval, and the connecting copper bars are positioned in the height interval of the avoidance space;

and/or the avoiding space extends from the top end of the first edge beam to the bottom plate direction of the tray;

and/or the avoidance space extends continuously and uninterruptedly along the second direction.

3. The battery pack according to claim 1, wherein: the frame further comprises a front beam, a second boundary beam and a rear beam, wherein the front beam, the first boundary beam, the rear beam and the second boundary beam are sequentially connected end to end, and the front beam is provided with an electric connection port;

and/or, the battery pack still includes first output copper bar and second output copper bar, first output copper bar is connected the power take off that the stack of electricity core just is close to front-axle beam one end along the second direction, the second output copper bar is connected the stack of electricity core just keeps away from the power take off of front-axle beam one end along the second direction, first output copper bar is followed the front-axle beam with clearance between the stack of electricity core extends to connect the electric port, the second output copper bar is followed in proper order first side roof beam with clearance between the stack of electricity core the front-axle beam with clearance between the stack of electricity core extends to connect the electric port.

4. The battery pack of claim 1, wherein the cell stack comprises:

the power output end is arranged at one end of the shell along the first direction;

the battery cores are arranged in the shell;

the first copper bar and the second copper bar are correspondingly arranged at the power output end of the shell and are respectively connected with the positive electrode and the negative electrode of the battery cells;

and/or, the connection copper bar is connected with the first copper bar and the second copper bar which are respectively arranged on the adjacent battery cell stacking bodies.

5. The battery pack of claim 1, wherein the cell stack comprises:

the power output end is arranged at one end of the shell along the first direction;

the battery comprises a plurality of battery cells arranged in a shell, wherein the battery cells are mutually overlapped along a third direction perpendicular to a plane where the first direction and the second direction are located, and the battery cells are mutually and electrically connected; and the number of the first and second groups,

the first copper bar and the second copper bar are arranged at the power output end and are respectively connected with the battery cores arranged at two ends of the third direction;

and/or the first copper bar comprises a first connecting lug extending to the height interval of the avoidance space along the third direction, and the second copper bar comprises a second connecting lug extending to the height interval of the avoidance space along the third direction;

and/or the first connecting lug and the second connecting lug are provided with butt joint end faces facing the first edge beam, and the butt joint end faces are used for butt joint of the connecting copper bars;

and/or the first connecting lug and the second connecting lug are respectively arranged at two sides of the power output end along the second direction.

6. The battery pack according to claim 1, wherein: the battery cell stack body includes:

the power output end is arranged at one end of the shell along the first direction;

the battery cells are arranged in the shell side by side along the second direction and are electrically connected with each other;

the first copper bar and the second copper bar are positioned at the power output end and are respectively connected with the battery cells arranged at two ends in the second direction;

and/or the first copper bar comprises a first connecting lug positioned in a height interval where the avoidance space is positioned, the second copper bar comprises a second connecting lug positioned in the height interval where the avoidance space is positioned, and the first connecting lug and the second connecting lug are used for butt joint with the connecting copper bar;

and/or the butt joint end faces of the first connecting lug and the second connecting lug face the bottom plate of the tray, and the connecting copper bar is connected with the butt joint end faces.

7. The battery pack according to claim 5, wherein: the first copper bar comprises a first attaching section attached to the inner wall of the shell, and the second copper bar comprises a second attaching section attached to the inner wall of the shell;

and/or, the surface of first laminating section and second laminating section has the insulating layer, perhaps, first laminating section and second laminating section all with insulating material has been filled up between the shell inner wall.

8. The battery pack according to claim 5 or 6, wherein: the plurality of battery cells are electrically connected through tabs, the tabs among the plurality of battery cells extend along the arrangement direction of the battery cells, and the first copper bar and the second copper bar are respectively connected with the tabs of the battery cells positioned at two ends of the arrangement direction;

the battery cell stacking body further comprises a temperature sensor connected with the lug;

and/or, the battery core stacking body further comprises an end cover connected with the power output end of the shell, and an opening used for avoiding the first connecting lug and the second connecting lug is formed in the end cover.

9. The battery pack according to claim 5 or 6, wherein: the battery cell stacking body further comprises a cold plate, the cold plate is arranged between the side walls of the adjacent shells of the two battery cell stacking bodies, and/or the cold plate is arranged on the upper wall surface or the lower wall surface of the shells of the battery cell stacking body, and/or the cold plate is arranged between the two adjacent battery cells of the battery cell stacking body;

and/or the other end of the shell along the first direction is a water cooling end, and the cold plate is provided with a water inlet and a water outlet which extend to the water cooling end.

10. An automobile, characterized in that: comprising a battery pack according to any one of claims 1 to 9.

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