CN220914438U

CN220914438U - Lithium battery box and lithium battery

Info

Publication number: CN220914438U
Application number: CN202322492074.9U
Authority: CN
Inventors: 伍小宏; 杨超; 王其权
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-07
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses a lithium battery box and a lithium battery, and belongs to the technical field of batteries. In view of the problem that the existing box body for packaging batteries occupies too large space in other equipment, the transition plate and the shrinkage plate are arranged at the joint of the side plates and the bottom plate of the box body, so that the lower part of the box body is shrunk inwards from the side plates of the box body to the accommodating space, a yielding channel is reserved on the outer side, as the positions of the battery core polar posts are arranged, a plurality of other parts are arranged on the upper part of the battery pack, and redundant parts are not arranged at the positions close to the bottom plate, the battery pack can be completely arranged in the box body, and a yielding channel is reserved on the outer side.

Description

Lithium battery box and lithium battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a lithium battery box and a lithium battery.

Background

Electric vehicles such as electric bicycles, electric vehicles, etc. are increasingly used due to the increasing demands for energy saving and environmental protection. For such electric vehicles, batteries have a significant role and meaning as a power source, which directly relates to the manufacturing cost, service life, and the like of such electric vehicles.

The square shell lithium ion battery cells in the power battery market are easy to group, have higher energy density and other reasons, but the square shell battery cells in the market are various in variety and poor in universality, so that the battery cell grouping technology which is universal for different vehicle types and has higher volume utilization rate and energy density is more and more important. After the lithium batteries are grouped, the lithium batteries are required to be filled into a box body for sealing, and then the lithium batteries can be installed into equipment such as automobiles to supply power for other parts, the conventional battery packaging box is generally a square box body, and the lithium batteries occupy large space in the equipment such as automobiles and are not beneficial to the installation of other equipment.

Disclosure of Invention

1. Technical problem to be solved by the utility model

In view of the problem that the existing box body for packaging batteries occupies too much space in other equipment, the utility model provides a lithium battery box body and a lithium battery.

2. Technical proposal

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

The utility model relates to a lithium battery box body, which is a semi-closed structure with one side open, and a containing cavity is formed in the lithium battery box body, and the lithium battery box body comprises a bottom plate, at least two box body side plates and at least two box body end plates, wherein the box body side plates are arranged oppositely, and the box body end plates are arranged oppositely along one surface of the bottom plate in a circumferential direction; the box side plate is connected with the bottom plate through a transition plate, the transition plate is obliquely arranged, and the box side plate is inclined towards the inside of the accommodating cavity.

Furthermore, the transition plate is connected with the bottom plate through the shrinkage plate, and the shrinkage plate and the box side plate are perpendicular to the bottom plate.

Further, the transition plate, the shrinkage plate and the bottom plate form a yielding channel together.

Further, edges are arranged on the box side plates, the transition plates and the shrinkage plates at intervals, and the edges are connected to the bottom plate through the transition plates and the shrinkage plates from the upper edges of the box side plates.

Further, the width of the edge from the box transition plate to the bottom plate gradually increases.

Furthermore, the side plate of the box body is provided with a limiting plate in a extending way, and the outermost edge of the limiting plate does not exceed the outermost edge of the bottom plate.

Furthermore, the limiting plate extends from the side plate of the box body towards the direction of the bottom plate, and a limiting space is formed between the limiting plate and the side plate of the box body.

Furthermore, the upper edges of the box side plates and the box end plates are provided with fixed edges, and screw holes are formed in the fixed edges.

Furthermore, the box end plate is provided with a yielding hole, and the yielding hole penetrates through the box end plate to communicate the accommodating cavity with the outside.

The lithium battery comprises the box body, and the battery cell group is arranged in the accommodating cavity in the box body.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) In view of the problem that the existing box body for packaging batteries occupies too large space in other equipment, the transition plate and the shrinkage plate are arranged at the joint of the side plates and the bottom plate of the box body, so that the lower part of the box body is shrunk inwards from the side plates of the box body to the accommodating space, a yielding channel is reserved on the outer side, as the positions of the battery core polar posts are arranged, a plurality of other parts are arranged on the upper part of the battery pack, and redundant parts are not arranged at the positions close to the bottom plate, the battery pack can be completely arranged in the box body, and a yielding channel is reserved on the outer side.

(2) According to the lithium battery box body, the plurality of edges which are arranged at intervals are arranged on the side plates, the transition plate and the contraction plate of the box body, so that the whole side edges of the box body are reinforced. The interval sets up and makes the passageway of stepping down still can play the effect, from top to bottom the design of widening gradually, can provide enough strong intensity support for the box lower part, still can not stretch out the bottom plate scope simultaneously, avoids increasing box occupation space.

(3) According to the lithium battery box body, the limiting plate extending towards the bottom plate is further arranged on the side plate of the box body, a limiting space is formed between the limiting plate and the side plate of the box body, the whole limiting plate is in a hook shape, after the box body is installed, other parts can be hooked, the box body is firmly fixed, the setting of a yielding channel is matched, and the box body is stably arranged in other equipment due to double protection.

(4) According to the lithium battery, the box body with the special structure is adopted, so that the occupied space of the battery in other equipment can be reduced, the battery can be firmly fixed in the other equipment, and the risk of falling off of the battery is avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of a battery pack according to the present utility model;

FIG. 2 is a schematic view of a separator plate according to the present utility model;

FIG. 3 is a schematic view of the structure of the case in the present utility model;

FIG. 4 is a schematic view of the structure of the case according to the present utility model at another view angle;

Fig. 5 is a side view of the case of the present utility model.

Reference numerals in the schematic drawings illustrate:

100. A case cover; 200. a battery pack; 210. a first end plate; 220. heating the film; 230. a first side pressure plate; 240. a battery cell; 250. a second end plate; 260. a partition plate; 261. a first spacer; 262. a second spacer; 270. a second side pressure plate; 280. a busbar;

300. A case; 310. a box side plate; 320. fixing the edges; 330. a transition plate; 340. a shrink plate; 350. an edge; 360. a bottom plate; 370. a box end plate; 380. a relief hole; 390. a limiting plate; 400. collecting plug-ins; 500. and (5) an electric bin.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

Examples

Referring to fig. 3-5, in the lithium battery case of the present embodiment, by disposing the transition plate 330 and the shrinkage plate 340 at the connection position between the case side plate 310 and the bottom plate 360, the lower portion of the case 300 is shrunk inwards from the case side plate 310 to the accommodating space, and a yielding channel is left on the outer side, because the positions of the battery cell poles are set, many other components are disposed on the upper portion of the battery pack 200, and no redundant components are disposed near the bottom plate 360, the battery pack 200 can be completely installed into the case 300, and a yielding channel is left on the outer side, so that when the battery case 300 is installed in an automobile or other equipment, the occupied space is reduced, and the yielding channel yields the installation position for other components, and meanwhile, the battery case 300 is firmly fixed and cannot fall.

Specifically, the lithium battery box body of the embodiment is a semi-closed structure with an opening at one side, and an accommodating cavity is formed inside the box body, and comprises a bottom plate 360, at least two oppositely arranged box body side plates 310 and at least two oppositely arranged box body end plates 370 extend out along one surface of the bottom plate 360 in the circumferential direction, and the bottom plate 360, the box body side plates 310 and the box body end plates 370 are connected to form a semi-closed structure with an opening at one side; the box side plate 310 is connected with the bottom plate 360 through the transition plate 330 and the contraction plate 340, the transition plate 330 is obliquely arranged, and the box side plate 310 is inclined towards the inside of the accommodating cavity. Wherein, the box side plate 310 is connected with the transition plate 330, the transition plate 330 is connected with the shrinkage plate 340, the shrinkage plate 340 is connected with the bottom plate 360, and the shrinkage plate 340 and the box side plate 310 are perpendicular to the bottom plate 360. The arrangement is such that the transition plate 330, the pinch plate 340 and the bottom plate 360 together form a relief channel that extends along the length of the side panel 310 of the cabinet. In this embodiment, the case side plates 310 are disposed on two opposite long sides of the bottom plate 360, and the case end plates 370 are disposed on two opposite short sides of the bottom plate 360. The case 300 is a rectangular parallelepiped and has an upper opening.

In order to strengthen the length direction of the box 300, the edges 350 are arranged on the box side plate 310, the transition plate 330 and the shrinkage plate 340 at intervals, the edges 350 are connected to the bottom plate 360 from the box side plate 310 along the transition plate 330 and the shrinkage plate 340, and the width of the edges 350 gradually increases from the box transition plate 330 towards the bottom plate 360. In this embodiment, a plurality of edges 350 are disposed on the side plates 310, the transition plate 330 and the contraction plate 340 at intervals, which can strengthen the side of the case 300. The interval setting makes the passageway of stepping down still can play the effect, from top to bottom widening's design can provide enough strong intensity support for box 300 lower part, still can not stretch out the 360 scope of bottom plate simultaneously, avoids increasing box 300 occupation space.

Further, the case 300 of the present embodiment is provided with a limiting plate 390 extending in a direction of the case side plate 310, and an outermost edge of the limiting plate 390 does not exceed an outermost edge of the bottom plate 360. The limiting plate 390 extends from the side plate 310 of the case toward the bottom plate 360, and a limiting space is formed between the limiting plate 390 and the side plate 310 of the case. In this embodiment, a limiting space is formed between a limiting plate 390 extending toward a bottom plate 360 and the box side plate 310, which are arranged on the box side plate 310, the limiting plate 390 is integrally hooked, after the box 300 is installed, other components can be hooked, the box 300 is firmly fixed, and the box 300 is stably arranged in other equipment due to the arrangement of a yielding channel in a matching manner, and the double protection is realized.

The box 300 of the present embodiment further has a fixing edge 320 at the opening, that is, the fixing edge 320 is disposed on the upper edges of the box side plate 310 and the box end plate 370, and the fixing edge 320 is provided with a screw hole. For mounting and securing the cover 100. The box end plate 370 is provided with a relief hole 380, and the relief hole 380 penetrates through the box end plate 370 to communicate the accommodating cavity with the outside.

Referring to fig. 1-2, a lithium battery of the present embodiment includes a case 300 as described above, and a battery pack 200 is disposed in an internal accommodating cavity of the case 300. Specifically, the battery pack 200 of this embodiment is provided with three rows of cells 240 in total, each row of cells 240 is adhered to each other by an insulating spacer (double-sided adhesive tape), a heating film 220 is disposed between the rows of cells 240, and a separator 260 made of an insulating PC sheet is used at the end of each of the three rows of cells 240 to separate the cells 240 from the aluminum profile end plate. The side edges of the three rows of battery cells 240 are clamped by using side pressure plates, the side pressure plates are fixed with end plates through bolts to form an integral large module, the upper parts of the battery cells 240 are welded with bus bars 280, and the upper parts of the bus bars 280 are protected by using PC insulation covers. The large modules are assembled and are suspended into a box by a tooling, the process of the box 300 is an aluminum casting process, and liquid cooling is integrated at the bottom. The lithium battery of this embodiment is fixed in two ways, either by screw connection or by structural adhesive connection. The screw connection is to fix the big plate of the big module through the long pull rod, the structural adhesive connection is to fill the structural adhesive at the bottom of the box 300, and then the battery pack 200 is hung into the box, and the two modes can be used alternatively or together. The box 300 adopts the cast aluminum process design, can integrate the liquid cooling function in an organic whole (liquid cooling function is optional), compares the section bar simultaneously, and the lightweight design of cast aluminum spare makes box 300 weight theory can reduce about 10%. The lithium battery design of this example is expected to reduce part types by 20%. The mass grouping efficiency of the overall battery system is expected to be improved by 8% and a system grouping efficiency of 90% is expected to be achieved.

In the lithium battery of this embodiment, the case 300 and the case cover 100 together form an accommodating space, the battery pack 200 is disposed inside the accommodating space, the battery pack 200 includes three rows of electric cores 240, two ends of the three rows of electric cores 240 are respectively provided with a first end plate 210 and a second end plate 250, a partition 260 is disposed between the end plate and the three rows of electric cores 240, the partition 260 includes a first partition 261 and a second partition 262 connected together, the first partition 261 has a multi-open-pore structure, the heat insulation between the electric cores 240 and the end plate is improved mainly by using the excellent heat insulation performance of air, the second partition 262 has a non-open-pore structure, the contact area of the end plate is mainly ensured, and the bonding area of double-sided adhesive tape is ensured to be sufficient. The two sides of the three rows of cells 240 are respectively pressed by using a first side pressing plate 230 and a second side pressing plate 270. The upper parts of the three rows of battery cells 240 are provided with bus bars 280, the bus bars 280 are connected with the collecting plug-in units 400 and the electrical bins 500, and the collecting plug-in units 400 and the electrical bins 500 extend out of the box 300 through the abdication holes 380. The lithium battery of this embodiment adopts the box 300 of special structure, can reduce the occupation space of battery in other equipment, can also firmly fix in other equipment simultaneously, has avoided the risk that the battery drops.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. The lithium battery box body is of a semi-closed structure with one side open, and a containing cavity is formed in the lithium battery box body, and is characterized by comprising a bottom plate (360), at least two box body side plates (310) which are arranged oppositely and at least two box body end plates (370) which are arranged oppositely extend out of one surface of the bottom plate (360) in the circumferential direction, wherein the bottom plate (360), the box body side plates (310) and the box body end plates (370) are connected to form a semi-closed structure with one side open; the box body side plate (310) is connected with the bottom plate (360) through the transition plate (330), the transition plate (330) is obliquely arranged, and the box body side plate (310) is inclined towards the inside of the accommodating cavity.

2. The lithium battery box according to claim 1, wherein the transition plate (330) is connected to the bottom plate (360) by a shrink plate (340), and the shrink plate (340) and the box side plate (310) are perpendicular to the bottom plate (360).

3. A lithium battery case according to claim 2, wherein the transition plate (330), the shrinkage plate (340) and the bottom plate (360) together form a relief channel.

4. A lithium battery box according to claim 2 or 3, characterized in that the box side plates (310), the transition plates (330) and the contraction plates (340) are provided with edges (350) at intervals, and the edges (350) are connected with the bottom plate (360) from the box side plates (310) along the transition plates (330) and the contraction plates (340).

5. A lithium battery case according to claim 4, wherein the edge (350) increases in width from the case transition plate (330) toward the bottom plate (360).

6. The lithium battery box according to claim 1, wherein the box side plate (310) is provided with a limiting plate (390) extending in a direction, and the outermost edge of the limiting plate (390) does not exceed the outermost edge of the bottom plate (360).

7. The lithium battery box according to claim 6, wherein the limit plate (390) extends from the box side plate (310) toward the bottom plate (360), and a limit space is formed between the limit plate (390) and the box side plate (310).

8. The lithium battery box according to claim 1, wherein the upper edges of the box side plate (310) and the box end plate (370) are provided with fixing edges (320), and the fixing edges (320) are provided with screw holes.

9. The lithium battery box according to claim 1, wherein the box end plate (370) is provided with a yielding hole (380), and the yielding hole (380) penetrates through the box end plate (370) to communicate the accommodating cavity with the outside.

10. A lithium battery, characterized by comprising a case (300) according to any one of claims 1-9, wherein a battery pack (200) is provided in an inner housing chamber of the case (300).