CN220021435U

CN220021435U - Box assembly of CTP battery pack and CTP battery pack

Info

Publication number: CN220021435U
Application number: CN202321598955.2U
Authority: CN
Inventors: 王松
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-11-14
Anticipated expiration: 2033-06-21

Abstract

The utility model relates to the technical field of power batteries, and discloses a box body assembly of a CTP battery pack and the CTP battery pack, wherein the box body assembly of the CTP battery pack comprises: a box body frame, wherein an accommodating space is formed in the box body frame in a surrounding manner; the fixed cross beam is arranged in an extending manner along the first direction and positioned in the accommodating space to divide the accommodating space into a battery cell assembling space and an electric element assembling space; the limiting partition plate is arranged in an extending manner along a second direction perpendicular to the first direction and is positioned in the battery cell assembly space to divide the battery cell assembly space into at least two battery cell accommodating grooves, and the battery cells in the battery cell accommodating grooves are overlapped along the first direction; and the adjusting compression beam is connected with the fixed cross beam and is adjustable in position along the first direction, and when the adjusting compression beam is locked with the fixed cross beam, the adjusting compression beam compresses the battery cell in the battery cell accommodating groove. The box assembly can reduce box tool parts, improve battery energy density, simplify and reliably assemble and fix the battery core, and improve the assembly efficiency of the battery pack.

Description

Box assembly of CTP battery pack and CTP battery pack

Technical Field

The utility model relates to the technical field of power batteries, in particular to a box assembly of a CTP battery pack and the CTP battery pack.

Background

At present, with the rapid development of electric vehicles, the market has higher requirements on the endurance mileage of the electric vehicles. At present, the continuous mileage of the electric automobile is increased without two points: first, increase power battery's electric quantity, second, promote power battery's energy density. The battery installation space of various automobiles is currently substantially fixed, which results in the inability to increase the amount of electricity of the power battery by merely relying on the battery pack becoming large. On the premise that the external outline of the battery pack is basically fixed, the energy density of the power battery is improved to be a better choice. Early power batteries often used a cell-module-pack assembly, and this conventional pack had low space utilization and limited the improvement in pack energy density. Therefore, how to increase the energy density of the battery pack is a problem to be solved in order to meet the current use demands.

Disclosure of Invention

The utility model aims to provide a box body assembly of a CTP battery pack and the CTP battery pack, wherein the box body assembly of the CTP battery pack can effectively reduce box body tooling parts, effectively improve battery energy density, and the battery cell assembly and fixation mode is simple and reliable, so that the assembly efficiency of the battery pack can be effectively improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a CTP battery pack case assembly comprising:

the box body frame is internally provided with an accommodating space in a surrounding manner;

the fixed cross beam is arranged in an extending mode along the first direction and is positioned in the accommodating space, so that the accommodating space is divided into a battery cell assembling space and an electric element assembling space;

the limiting separation plates are arranged in an extending mode along a second direction, the second direction is perpendicular to the first direction, the limiting separation plates are located in the battery cell assembly space to divide the battery cell assembly space into at least two battery cell accommodating grooves, and battery cells in each battery cell accommodating groove are stacked along the first direction;

the adjusting compression beam is connected with the fixed beam and is adjustable along the first direction relative to the fixed beam, and when the adjusting compression beam is locked with the fixed beam, the adjusting compression Liang Yajin is used for adjusting the battery cells in the battery cell accommodating groove.

In the box body component of the CTP battery pack, the space in the box body frame is directly divided into the electric core assembly space and the electric element assembly space, the electric core assembly space is divided into the electric core accommodating groove, the electric cores are directly arranged in the electric core accommodating groove in a superposition manner, the tool for stacking the battery modules is saved, the superposed electric cores can be restrained by the limiting partition plates, and the electric cores can be directly and quickly assembled and placed along the electric core accommodating groove when being assembled, so that the assembly efficiency is improved; and compress tightly fixedly through adjusting the cooperation of clamp beam and fixed crossbeam with the electricity core, further save box inside structure, be favorable to promoting the energy density of battery package to compress tightly fixed mode simple reliable, effectively improved the assembly efficiency of battery package.

Optionally, the box assembly of CTP battery package still includes liquid cooling system, liquid cooling system is including being located the liquid cooling board of box frame bottom, have the liquid cooling passageway in the liquid cooling board, the liquid cooling board has inlet and liquid outlet, the inlet with the liquid outlet all with the liquid cooling passageway intercommunication.

Optionally, a pad extending along the first direction is arranged at the bottom of each cell accommodating groove, and the pad is used for supporting the cell.

Optionally, two spacer plates arranged at intervals are arranged at the bottom of each cell accommodating groove, and two spacer plates adjacent to the same limiting separator have an integrated structure.

Optionally, the top side surface of the fixed cross beam is an inclined guide surface, and the side edge of the inclined guide surface facing the electric element assembly space is higher than the side edge of the inclined guide surface facing the electric core accommodating groove; the inclined guide surface is provided with a locking hole, and the axial lead of the locking hole is perpendicular to the first direction and the second direction;

the adjusting compression beam is provided with a limiting extrusion part positioned at one side of the fixed cross beam, which faces the battery cell assembly space, and the surface of the limiting extrusion part, which faces the battery cell assembly space, forms an extrusion surface; the top side of the limiting extrusion part is provided with an adjusting and matching part extending towards the direction of the fixed cross beam, and the adjusting and matching part is provided with a matching inclined plane matched with the inclined guide surface; the adjusting and matching part is provided with a through hole used for matching with the locking hole, the axial lead of the through hole is perpendicular to the first direction and the second direction and penetrates through the adjusting and matching part, and the through hole penetrates through the matching inclined plane; the adjusting compression beam is connected and locked with the fixed cross beam through a bolt penetrating through the through hole, and the bolt is in threaded connection with the locking hole.

Optionally, the through hole is a bar hole, and a length direction of the bar hole extends along the first direction.

Optionally, the case assembly of the CTP battery pack further comprises foam for being disposed between two of the stacked cells adjacent to each other.

Optionally, the case assembly of the CTP battery pack further includes a case cover connected with a top side of the case frame for covering the battery cell assembly space and the electrical element assembly space.

Optionally, a sealing gasket is arranged at the joint between the case cover and the case frame.

Based on the same design concept, the scheme also provides a CTP battery pack, which comprises the box body component of any CTP battery pack provided by the technical scheme.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:

fig. 1 is a schematic structural diagram of a CTP battery pack according to an embodiment of the present utility model when a casing assembly of the CTP battery pack is filled with a battery cell;

fig. 2 is a schematic structural diagram of a box assembly of a CTP battery pack according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a box assembly of a CTP battery pack according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view taken along the direction A-A in FIG. 3;

fig. 5 is a schematic structural view of an adjusting compression beam according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a fixed beam according to an embodiment of the present utility model.

Icon: 1-a box frame; 2-fixing the cross beam; 3-limiting baffle plates; 4-adjusting the compression beam; 5-liquid cooling plate; 6-backing plate; 7-soaking cotton; 8-an electric core; 9-accommodation space; 11-a first fixed frame; 12-a second fixed frame; 13-a third fixed frame; 14-fourth fixed frame; 21-inclined guide surfaces; 22-locking holes; 41-limit extrusion part; 42-adjusting the mating part; 51-a liquid inlet; 52-a liquid outlet; 91-cell assembly space; 92-electrical component assembly space; 411-pressing surface; 421-through holes; 422-mating ramp.

Detailed Description

The utility model will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the utility model and not limitation of the utility model. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present utility model encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.

In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.

Referring to fig. 1, 2 and 4, the present utility model provides a case assembly of a CTP battery pack, comprising: the box body frame 1, the fixed cross beam 2, the limiting baffle 3 and the adjusting compression beam 4, wherein an accommodating space 9 is formed in the inner periphery of the box body frame 1, the box body frame 1 can be a rectangular frame, the box body frame comprises a first fixed frame 11 and a second fixed frame 12 which are oppositely arranged, a third fixed frame 13 and a fourth fixed frame 14 which are oppositely arranged, the first fixed frame 11, the third fixed frame 13, the second fixed frame 12 and the fourth fixed frame 14 are sequentially connected end to form the accommodating space 9, the first fixed frame 11 and the second fixed frame 12 are arranged in parallel, the first fixed frame 11 and the second fixed frame 12 are arranged in an extending mode along a first direction, the third fixed frame 13 and the fourth fixed frame 14 are arranged in parallel, the first fixed frame and the fourth fixed frame extend in a second direction, and the second direction is perpendicular to the first direction; the fixed beam 2 is disposed to extend in the first direction, and the fixed beam 2 is disposed in the accommodating space 9 such that the accommodating space 9 is partitioned into a battery cell assembling space 91 and an electric element assembling space 92, the battery cell assembling space 91 and the electric element assembling space 92 are located at both sides of the fixed beam 2, respectively, the battery cell assembling space 91 is used for accommodating and mounting the battery cell 8, and the electric element assembling space 92 is used for accommodating and mounting electric devices connected with the battery cell 8, for example, a battery management system BMS; the limiting partition plate 3 is provided with at least one, the limiting partition plate 3 extends along the second direction, the limiting partition plate 3 is located in the battery core assembling space 91, the battery core assembling space 91 is divided into at least two battery core accommodating grooves, a plurality of stacked battery cores 8 are assembled in the battery core accommodating grooves, the battery cores in each battery core accommodating groove are stacked along the first direction, the limiting partition plate 3 can be provided with two, the battery core assembling space 91 is divided into four battery core accommodating grooves, the limiting partition plate 3 can restrict the stacked battery cores, and when the battery cores are assembled, the battery cores can be assembled and placed directly and quickly along the battery core accommodating grooves, so that the battery cores are prevented from being not orderly stacked; the adjustment pressing beam 4 can be arranged on one side of the fixed cross beam 2 facing the battery cell assembly space 91, is connected with the fixed cross beam 2, and is adjustable relative to the fixed cross beam 2 along the first direction, when the adjustment pressing beam 4 is locked with the fixed cross beam 2, the adjustment pressing beam 4 presses the battery cells in the battery cell accommodating groove, and after the battery cells are stacked and assembled, the adjustment pressing beam 4 is adjusted relative to the fixed cross beam 2 to adapt to the fixing condition of the battery cells in the battery cell accommodating groove, so that the battery cells can be firmly pressed and fixed in the stacking direction, the mode of fixing the battery cells is simple and reliable, and the box member is simplified.

Specifically, as shown in fig. 2 and 3, the box assembly of the CTP battery pack further includes a liquid cooling system, the liquid cooling system includes a liquid cooling plate 5 located at the bottom of the box frame 1, a liquid cooling channel is provided in the liquid cooling plate 5, the liquid cooling plate 5 has a liquid inlet 51 and a liquid outlet 52, and both the liquid inlet 51 and the liquid outlet 52 are communicated with the liquid cooling channel. The liquid cooling plate 5 is directly arranged at the bottom of the box body frame 1 and is also the bottom of the accommodating space 9, the liquid cooling plate 5 can be directly used as a bottom bearing piece of the box body frame 1 to support the battery cell, the structural components of the box body assembly are saved, and the battery cell can be directly subjected to thermal management and adjustment.

With continued reference to fig. 2 and 3, in order to prevent the cell bottoms from being scratched, a backing plate 6 extending in the first direction is provided at each cell receiving groove bottom, the backing plate 6 being used to support the cells. The backing plate 6 can be attached to the surface of the liquid cooling plate 5 facing the battery cell accommodating groove, so that the bottom of the battery cell is prevented from being directly placed on the liquid cooling plate 5, friction of the liquid cooling plate 5 to the battery cell is reduced, and the bottom of the battery cell is protected. Preferably, for the pad 6, a PC sheet may be selected.

For the specific arrangement of the base plates, as one possible implementation manner, as shown in fig. 3, two base plates 6 arranged at intervals are arranged at the bottom of each cell accommodating groove, and two base plates 6 adjacent to the same limiting separator 3 have an integral structure. A backing plate 6 may be disposed at positions close to the third fixing frame 13 and the fourth fixing frame 14, and a backing plate 6 may be disposed under each of the limiting spacers 3, wherein a width of the backing plate 6 disposed under the limiting spacer 3 may be greater than a width of the backing plate 6 disposed at the first fixing frame 11 and the third fixing frame 13, so that two side edge portions of the battery cell in each battery cell solute tank may be supported by the backing plate 6.

As a structural arrangement mode of the fixed cross beam and the adjusting compression beam, as shown in fig. 5 and 6, the top side surface of the fixed cross beam 2 is provided with an inclined guide surface 21, and the side edge of the inclined guide surface 21 facing the electric element assembly space 92 is higher than the side edge of the inclined guide surface 21 facing the electric core accommodating groove; the inclined guide surface 21 is provided with a locking hole 22, and the axial lead of the locking hole 22 is perpendicular to the first direction and the second direction; the adjusting compression beam 4 is provided with a limiting extrusion part 41 positioned on one side of the fixed cross beam 2 facing the battery cell assembly space 91, and the surface of the limiting extrusion part 41 facing the battery cell assembly space 91 forms an extrusion surface 411; the top side of the limiting extrusion part 41 is provided with an adjusting and matching part 42 extending towards the direction of the fixed cross beam 2, the adjusting and matching part 42 is provided with a matching inclined surface 422 matched with the inclined guide surface 21, and the matching inclined surface 422 can be in sliding fit with the firearm guide surface; the adjustment engaging portion 42 has a through hole 421 for engaging with the lock hole 22, the axis of the through hole 421 is perpendicular to the first direction and the second direction, and the through hole 421 penetrates the adjustment engaging portion 42, and the through hole 421 penetrates the engaging slope 422; the adjusting compression beam 4 and the fixed cross beam 2 are connected and locked through bolts passing through the through holes 421, and the bolts are connected with the locking holes 22 in a threaded manner. After the bolts are screwed through the through holes 421 and the locking holes 22, the adjustment hold-down beam 4 is fixed to the fixed cross beam 2. Preferably, at least two locking holes 22 are provided on the fixed cross member 2 along the extending direction of the fixed cross member 2, and through holes 421 corresponding to the at least two locking holes 22 one by one are provided on the adjustment fitting portion 42. For example, three locking holes 22 may be provided on the fixed cross beam 2, and three through holes 421 may be provided on the adjustment matching portion 42 corresponding to one of the three through holes, so that the adjustment hold-down beam 4 may be locked and fixed with the fixed cross beam 2 more stably.

Wherein, in order to improve the regulation flexibility of adjusting the hold-down beam, set up the through-hole into the bar hole, the length direction in bar hole extends along first direction. The length of the battery cell accommodating groove in the first direction during compression locking can be properly adjusted, the battery cell can be prevented from being compressed too tightly, and the battery cell is properly assembled in the box frame under proper stress, so that the battery cell is prevented from being damaged.

In addition, as shown in fig. 2, in one possible implementation, the case assembly of the CTP battery pack further includes a foam 7, and the foam 7 is disposed between two cells 8 adjacent to each other among the stacked cells 8. Can effectively separate two adjacent electric cores in the superposition to play a role in protection.

Referring to fig. 1 and 3, the case assembly of the CTP battery pack further includes a case cover coupled to the top side of the case frame 1 for covering the battery cell assembly space 91 and the electric component assembly space 92 for dust and water prevention. The box cover is connected with the box body frame 1, so that the battery cell, the electrical elements and the like can be effectively covered, dust prevention and water drainage can be realized, and a protection effect can be realized.

Further, in order to enhance the sealing property between the case cover and the case frame, a gasket is provided at the junction between the case cover and the case frame.

For the connection between the CTP battery pack and the external member, for example, the CTP battery pack needs to be mounted on the chassis of the automobile, mounting holes may be respectively formed in the frame of the box frame, for example, the third fixing frame and the fourth fixing frame, and then the CTP battery pack passes through the mounting holes through bolts to be fixedly connected with the external member.

Based on the same design concept, the present embodiment also provides a CTP battery pack, comprising: a case assembly for any CTP battery pack as provided in the above embodiments.

The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model, and various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A CTP battery pack case assembly comprising:

2. The CTP battery pack housing assembly according to claim 1, further comprising a liquid cooling system comprising a liquid cooling plate positioned at the bottom of said housing frame, said liquid cooling plate having a liquid cooling channel therein, said liquid cooling plate having a liquid inlet and a liquid outlet, said liquid inlet and said liquid outlet both in communication with said liquid cooling channel.

3. The CTP battery pack case assembly according to claim 2, wherein each of said cell receiving groove bottoms is provided with a spacer extending in said first direction for supporting said cells.

4. A CTP battery pack case assembly according to claim 3, wherein each of said cell receiving groove bottoms is provided with two spacer plates disposed at intervals, and two spacer plates adjacent to the same limiting separator have an integral structure.

5. The CTP battery pack case assembly according to any one of claims 1-4, wherein a top side surface of said fixed beam is an inclined guide surface, a side edge of said inclined guide surface facing said electrical component mounting space being higher than a side edge of said inclined guide surface facing said cell receiving groove; the inclined guide surface is provided with a locking hole, and the axial lead of the locking hole is perpendicular to the first direction and the second direction;

6. The CTP battery pack case assembly according to claim 5, wherein the through hole is a bar hole, and a length direction of the bar hole extends along the first direction.

7. The CTP battery pack housing assembly according to claim 1, further comprising foam for placement between two of said cells adjacent to each other in a stacked cell.

8. The CTP battery pack housing assembly according to claim 1, further comprising a case cover coupled to a top side of said housing frame for covering said cell assembly space and said electrical component assembly space.

9. The CTP battery pack case assembly according to claim 8, wherein a gasket is provided at a connection between the case cover and the case frame.

10. A CTP battery pack comprising: the CTP battery pack case assembly of any one of claims 1-9.