CN116315394A

CN116315394A - Battery module and vehicle with same

Info

Publication number: CN116315394A
Application number: CN202211708031.3A
Authority: CN
Inventors: 吕宁; 阎超; 张占江; 卢雨龙; 翟旭亮; 周琪; 宫吉山
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-23

Abstract

The invention provides a battery module and a vehicle with the same. The battery module includes: the box body is internally provided with a plurality of slave controller accommodating cavities and battery cell accommodating cavities; the battery cell group is multiple and is arranged in the battery cell accommodating cavity, and the battery cell group at least comprises multiple battery cells which are stacked along the thickness direction of the battery cells; the high-low voltage integrated assemblies are multiple, each high-low voltage integrated assembly is connected with at least two cell groups, the high-low voltage integrated assemblies extend along the thickness direction of the cell, and the high-low voltage integrated assemblies are connected with the bus bars; the slave controller is arranged in the slave controller accommodating cavity and is connected with the high-low voltage integrated component. By means of the scheme, the high-low voltage wire harness is integrated in the battery module, the occupied space of the wire harness is reduced, the number of connectors and the butting frequency are reduced, the space occupancy rate of the battery cells is improved, and the problem that the vehicle endurance mileage is low due to the fact that the number of the battery cells can be limited in the battery is solved.

Description

Battery module and vehicle with same

Technical Field

The invention relates to the technical field of vehicle power battery design, in particular to a battery module and a vehicle with the same.

Background

The endurance mileage of the electric automobile is always an important index focused by consumers and is limited by the energy density of the battery core and the envelope size of the battery pack, the number of the battery core which can be accommodated in the battery is limited, and some measures are implemented for increasing the space occupation rate of the battery core in the battery pack on the premise of ensuring safety, and mainly surround the physical integration and the functional integration of the other parts except the battery core so as to reduce the space occupation proportion of the parts.

Aiming at the problem of low vehicle endurance mileage caused by limited number of receivable battery cores in the battery in the prior art, no effective solution is proposed at present.

Disclosure of Invention

The invention mainly aims to provide a battery module and a vehicle with the battery module, so as to solve the problem of low vehicle endurance mileage caused by limited number of battery cores which can be accommodated in a battery in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a battery module including: the box body is internally provided with a plurality of slave controller accommodating cavities and battery cell accommodating cavities; the battery cell group is multiple and is arranged in the battery cell accommodating cavity, and the battery cell group at least comprises multiple battery cells which are stacked along the thickness direction of the battery cells; the high-low voltage integrated assemblies are multiple, each high-low voltage integrated assembly is connected with at least two cell groups, the high-low voltage integrated assemblies extend along the thickness direction of the cell, and the high-low voltage integrated assemblies are connected with the bus bars; the slave controller is arranged in the slave controller accommodating cavity and is connected with the high-low voltage integrated component.

Further, the high-low voltage integrated component includes: the insulating films are of sheet structures, two insulating films are arranged, and the two insulating films are arranged in an extending mode along the thickness direction of the battery core; the inter-cell bus bar assembly is arranged between the two insulating films, extends along the thickness direction of the cell, and is connected with one end, close to the slave controller, of the inter-cell bus bar assembly; the flexible circuit board assembly is arranged between the two insulating films, extends along the thickness direction of the battery core, and one end of the flexible circuit board assembly is connected with the slave controller; the framework structures are arranged in a plurality, and are arranged in a telescopic manner along the width direction of the insulating films, and are arranged on one of the insulating films; the support subassembly, support subassembly is a plurality of, and support subassembly extends along the width direction of insulating film and sets up.

Further, the bus bar component between the battery cells is of a multilayer aluminum sheet press-fitting structure.

Further, at least a portion of the outer surface of the high and low voltage integrated assembly is coated with an insulating material.

Further, the battery module includes: the end plate is connected with the battery cells positioned at the end parts of the battery cell groups, end plate positioning structures are arranged at the two ends of the end plate, at least part of the surface of the end plate is provided with a collision structure, and the end plate positioning structures and the collision structure are both in butt joint with the cavity wall of the battery cell accommodating cavity; the end plate is provided with a busbar fixing position which is used for connecting the busbar assembly and the busbar between the battery cells.

Further, the end plate includes: the battery cell comprises an end plate body, wherein an end part heat preservation pad is arranged on the surface, close to the battery cell, of the end plate body, a collision structure is arranged on the surface, far away from the battery cell, of the end plate body, and end plate positioning structures are respectively arranged at two ends of the end plate body; the end plate body is provided with at least one connecting structure, a first side face, a second side face, a third side face and a fourth side face are sequentially arranged along the circumferential direction of the connecting structure, the first side face is arranged towards the battery cell, the third side face is arranged opposite to the first side face, the second side face is arranged opposite to the fourth side face, a buckling hole is formed in the third side face, and first clamping structures are arranged on the second side face and the fourth side face; the end face of the connecting structure is provided with a busbar fixing position.

Further, the busbar fixing position is provided with a fastening nut.

Further, the battery module further includes a protective cover, the protective cover including: the end cover is arranged in an extending manner along the length direction of the battery cell; the first side cover is connected with the end cover in an included angle manner, extends along the length direction of the battery cell, and is provided with a cantilever which extends into the clamping hole; the two second side covers are respectively arranged at two sides of the first side cover, the second side covers are connected with the end cover in an included angle manner, the second side covers extend along the thickness direction of the battery cell, second clamping structures are respectively arranged on the two second side covers, and the second side covers are connected with the connecting structure through the second clamping structures and the first clamping structures; wherein, all be provided with the opening structure on end cover and the second side cover.

Further, the first clamping structure at least comprises a limiting groove, the limiting groove extends along the height direction of the end plate body, the second clamping structure at least comprises a guiding structure, the guiding structure extends along the height direction of the battery cell, and when the second side cover is connected and matched with the connecting structure, at least part of the guiding structure extends into the limiting groove.

Further, a buffer cushion and a heat insulation pad are alternately arranged among the plurality of battery cells.

According to another aspect of the present invention, there is provided a vehicle having a power battery, the battery module of which is the battery module described above.

By applying the technical scheme of the invention, the high-low voltage wire harness is integrated in the battery module, the occupied space of the wire harness is reduced, the number of connectors and the butting frequency are reduced, the cost is reduced, the safety is improved, the space occupancy rate of the battery core is improved, the problem of low vehicle endurance mileage caused by the limited number of the battery capable of containing the battery core in the prior art is solved to a certain extent, the slave controller is independently placed in the accommodating cavity of the slave controller, the failure risk of the slave controller when the front of an automobile is impacted is reduced, and the safety of the vehicle is improved.

Drawings

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

fig. 1 shows a schematic structure of an embodiment of a battery module according to the present invention;

FIG. 2 shows an enlarged schematic view of portion A of FIG. 1;

FIG. 3 shows a schematic structural view of an embodiment of a high and low voltage integrated assembly according to the present invention;

fig. 4 shows a schematic structural view of an embodiment of an insulating film according to the present invention;

FIG. 5 shows an enlarged schematic view of portion B of FIG. 4;

fig. 6 shows a schematic structural view of an embodiment of a tank according to the present invention;

fig. 7 shows a schematic structural view of an embodiment of a cell stack according to the present invention;

fig. 8 shows a schematic structural view of an embodiment of an end plate according to the invention;

FIG. 9 shows a schematic structural view of an embodiment of a high and low voltage integrated assembly connected to a cell in accordance with the present invention;

FIG. 10 shows a schematic structural view of an embodiment of a protective cover according to the present invention;

FIG. 11 shows a schematic structural view of an embodiment of a busbar to header connection according to the present invention;

FIG. 12 shows a schematic structural view of an embodiment of a skeletal structure in accordance with the present invention;

FIG. 13 shows a schematic structural view of an embodiment of an inter-cell buss bar assembly according to the present invention;

fig. 14 shows a flow chart of a method of selecting a heat insulation mat and a cushioning mat according to the present invention.

Wherein the above figures include the following reference numerals:

1. a battery cell; 2. a cushion pad; 3. a heat insulating mat;

4. an end plate; 41. an end plate body; 401. an end thermal insulation pad; 402. an end plate positioning structure; 403. a fastening nut; 404. a collision structure; 405. a snap hole; 406. a buckle interface; 407. a limit structure; 408. a limit groove;

5. a high-low voltage integrated component; 501. an insulating film; 5010. a bending structure; 502. an inter-cell bus assembly; 503. a flexible circuit board assembly; 505. a bracket assembly; 506. a framework structure; 5061. a telescopic structure;

6. an insulating material;

7. a case; 101. a cell cavity; 102. a slave controller cavity;

8. a slave controller;

9. a protective cover; 90. an end cap; 91. a first side cover; 901. an opening structure; 902. a second side cover; 903. a guide structure; 904. a cantilever;

10. and a bus bar.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

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.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

As shown in fig. 1 to 13, according to an embodiment of the present application, a battery module is provided.

The battery module comprises a box body 7, a battery cell group, a high-low voltage integrated component 5 and a slave controller 8, wherein a plurality of slave controller cavities 102 and battery cell cavities 101 are arranged in the box body 7; the battery cell group is arranged in the battery cell accommodating cavity 101, and at least comprises a plurality of battery cells 1, wherein the battery cells 1 are stacked along the thickness direction of the battery cells 1; the high-low voltage integrated assemblies 5 are multiple, each high-low voltage integrated assembly 5 is connected with at least two cell groups, the high-low voltage integrated assemblies 5 are arranged in an extending mode along the thickness direction of the cell 1, and the high-low voltage integrated assemblies 5 are connected with the bus bars 10; the slave controller 8 is disposed in the slave controller chamber 102, and the slave controller 8 is connected to the high-low voltage integrated component 5.

By applying the technical scheme of the embodiment, the high-low voltage wire harness is integrated in the battery module, the occupied space of the wire harness is reduced, the number of connectors and the butting frequency are reduced, the cost is reduced, the safety is improved, the space occupancy rate of the battery core is improved, the problem that the vehicle endurance mileage is low due to the fact that the number of the battery core which can be contained in the battery is limited in the prior art is solved to a certain extent, the slave controller 8 is independently placed in the slave controller containing cavity 102, the failure risk of the slave controller 8 in front impact of an automobile is reduced, and the safety in use of the vehicle is improved.

Specifically, as shown in fig. 2, in an exemplary embodiment of the present application, the box 7 includes at least one cross beam and a longitudinal beam, the cross beam extends along a first preset direction, and the cross beam is used for dividing a receiving cavity of the box 7 into a slave controller receiving cavity 102 and a battery cell receiving cavity 101; the longitudinal beams are multiple, the longitudinal beams extend along the second preset direction, the longitudinal beams are used for dividing the battery cell accommodating cavity 101 into multiple single-row battery cell group cavities, and the single-row battery cell group cavities are used for accommodating the single-row battery cell groups. It should be noted that, in this embodiment, the first preset direction is the length direction of the battery cell 1, and the second preset direction is the thickness direction of the battery cell 1. Through the structure setting of box 7, can hold multirow list electric core 1 simultaneously in the box 7, improved the structural strength of battery package to, separate by the longeron between the electric core 1 of multirow, reduced electric core heat diffusion rate. In this embodiment, the slave controller 8 and the battery cell 1 are matched in position, so that the length of the low-voltage wire harness from the battery cell 1 to the slave controller 8 can be reduced, the cost is reduced, and the safety is improved.

Preferably, in this embodiment, the slave controller 8 is connected with two rows of battery cell groups, the box 7 is provided with 8 battery cell groups and 4 slave controllers 8 in total, the battery pack assembly corresponds to the slave controllers in space one by one, the high-low voltage integrated assembly 5 is arranged on the upper part of the battery pack assembly, the high-low voltage integrated assembly 5 is connected with the battery cells 1, serial-parallel connection between the battery cells 1 is realized, the high-low voltage integrated assembly 5 is connected with the slave controllers 8, and direct transmission of low-voltage signals is realized.

Preferably, the slave controller pocket 102 is disposed in the rear of the electric vehicle and the placement of the slave controller 8 alone within the slave controller pocket 102 reduces the risk of the slave controller 8 failing upon impact of the vehicle.

Further, the high-low voltage integrated assembly 5 includes an insulating film 501, an inter-cell busbar assembly 502, a flexible circuit board assembly 503, a skeleton structure 506 and a bracket assembly 505, wherein the insulating film 501 has a sheet structure, two insulating films 501 are provided, and the two insulating films 501 are arranged in an extending manner along the thickness direction of the cell 1; the inter-cell bus bar assembly 502 is arranged between the two insulating films 501, the inter-cell bus bar assembly 502 extends along the thickness direction of the cell 1, and one end, close to the slave controller 8, of the inter-cell bus bar assembly 502 is connected with the bus bar 10; the flexible circuit board assembly 503 is arranged between the two insulating films 501, the flexible circuit board assembly 503 is arranged in an extending mode along the thickness direction of the battery core 1, and one end of the flexible circuit board assembly 503 is connected with the slave controller 8; the skeleton structures 506 are multiple, the skeleton structures 506 are arranged in a telescopic manner along the width direction of the insulating films 501, and the skeleton structures 506 are arranged on one of the insulating films 501; the plurality of holder assemblies 505 is provided, and the holder assemblies 505 are provided so as to extend in the width direction of the insulating film 501. The insulating film 501 has the functions of safety protection, insulation protection and physical integration, the inter-cell bus bar component 502 is a channel for current transmission between cells, and the bracket component 505 is a framework and a positioning device of the high-low voltage integrated component 5. The flexible circuit board assembly 503 is directly connected with the slave controller 8 in the package, so that the arrangement space of the middle wiring harness and the number of connectors are saved, and the cost and the connector connection failure risk are reduced. As shown in fig. 9, the high-low voltage integrated component 5 is directly connected with the slave controller 8, so that low-voltage wiring harnesses are saved, the number of connectors is reduced, cost reduction is realized, and space occupation rate is improved. The skeleton structure 506 is telescopically arranged along the width direction of the insulating film 501, so that the skeleton structure 506 can span multiple rows of cell groups and simultaneously provide support for the whole high-low voltage integrated assembly 5.

In one exemplary embodiment of the present application, the high and low voltage integrated assembly 5 further includes a thermal pad, which is a thermal medium that transfers the cell temperature to the temperature sensor in the flexible circuit board assembly 503.

In an exemplary embodiment of the present application, the insulating film 501 is in a sheet structure, and the upper and lower insulating films 501 are bonded together by a hot pressing process, and the insulating films 501 and the inter-cell busbar assembly 502, the flexible circuit board assembly 503, and the bracket assembly 505, which are coated in the middle, are bonded together by gluing. Preferably, the insulating film 501 has a bending structure 5010, and the bending structure 5010 is provided to extend in the width direction of the insulating film 501, so that the whole assembly press-fit is more fit.

In one exemplary embodiment of the present application, the backbone structure 506 includes two telescoping structures 5061, and the two telescoping structures 5061 may be stretched in opposite directions to adjust the length of the backbone structure 506.

Preferably, the inter-cell buss bar assembly 502 is a multi-layered aluminum sheet press-fit structure. This arrangement may make the inter-cell buss bar assembly 502 less likely to break, and more durable.

In connection with the above embodiment, it is preferable that the insulating film 501 is a heat press film. The high-low voltage integrated component 5 is provided with the skeleton structure 506 which is adjustable along the width direction of the insulating film 501, so that the high-low voltage integrated component 5 can span multiple rows of independent battery cell groups, the integral regulation function of the component is realized through the bending structure 5010 of the insulating film 501, the skeleton structure 506 and the multilayer structure of the inter-battery-cell bus bar component 502, the bridging of multiple groups of independent battery cell groups is realized, and the use of parts such as a transfer bus bar, a base and a protective cover for bridging adjacent battery cell groups is saved. Saving cost and improving space utilization.

Further, at least part of the outer surface of the high and low voltage integrated component 5 is covered with an insulating material 6. The insulating material 6 may have a film-like structure. Through setting up insulating material 6, can cover the naked metal component in the high-low pressure integrated component 5, compare with traditional scheme and improved the space utilization of battery package Z to (i.e. the direction of height of electric core 1) and reduced the cost, have the metal chip that easily drops on the metal component, set up insulating material 6 and reduced the risk that the metal chip drops.

Further, the battery module comprises an end plate 4, the end plate 4 is connected with the battery cell 1 positioned at the end part of the battery cell group, end plate positioning structures 402 are arranged at two ends of the end plate 4, an abutting structure 404 is arranged on at least part of the surface of the end plate 4, and the end plate positioning structures 402 and the abutting structure 404 are all in abutting connection with the cavity wall of the battery cell accommodating cavity 101; the end plate 4 is provided with a busbar fixing position for connecting the inter-cell busbar assembly 502 and the busbar 10.

In this embodiment, the end plate positioning structure 402 is a matching structure that is matched with the box 7 in the assembling process of the battery cells, and has guiding and positioning functions, after the battery cells are assembled into the battery cell accommodating cavity 101, the end plate positioning structure 402 is matched and connected with a corresponding structure arranged on the longitudinal beam, so as to realize positioning and fixing of the battery cell group. The abutting structure 404 is used for being contacted and fixed with the cross beam in the box body 7. In this embodiment, the end plate 4 and the cross members and the side members in the case 7 are not bonded to each other, and are abutted to each other after being assembled.

Specifically, the end plate 4 includes an end plate body 41, an end heat insulation pad 401 is disposed on a surface of the end plate body 41, which is close to the battery cell 1, an abutting structure 404 is disposed on a surface of the end plate body 41, which is far away from the battery cell 1, and end plate positioning structures 402 are respectively disposed at two ends of the end plate body 41; the end plate body 41 is provided with at least one connecting structure, a first side face, a second side face, a third side face and a fourth side face are sequentially arranged along the circumferential direction of the connecting structure, the first side face is arranged towards the battery cell 1, the third side face is opposite to the first side face, the second side face is opposite to the fourth side face, the third side face is provided with a clamping hole 405, and the second side face and the fourth side face are provided with first clamping structures; the end face of the connecting structure is provided with a busbar fixing position.

In an exemplary embodiment of the present application, the end thermal pad 401 is adhered to the battery cell 1 along the thickness direction of the battery cell 1, the end thermal pad 401 has a low thermal conductivity coefficient and has a function of slowing down the temperature decrease speed of the battery cell 1, preferably, the end thermal pad 401 is made of a soft foam material, which can absorb the assembly tolerance of the battery cell and provide an expansion space in the respiratory expansion process of the battery cell 1. The end plate body 41 is preferably made of a non-metal material, and the end heat insulation pad 401 and the end plate body 41 together form a heat insulation layer of the battery cell 1, so that the heat transfer rate between the battery cell 1 and the box body 7 is reduced.

Further, a busbar fixing position is provided with a fastening nut 403. The fastening nut 403 is arranged to enable the busbar 10 to be connected with the busbar assembly 502 between the battery cells through bolts, so that the assembly and disassembly are more convenient.

Specifically, in embodiments of the present application, the fastening nut 403 may play in the end plate 4 to adjust for bus bar 10 installation tolerances.

Further, the battery module further comprises a protective cover 9, the protective cover 9 comprises an end cover 90, a first side cover 91 and a second side cover 902, and the end cover 90 is arranged in an extending manner along the length direction of the battery cell 1; the first side cover 91 is connected with the end cover 90 in an included angle, the first side cover 91 extends along the length direction of the battery cell 1, a cantilever 904 is arranged on the first side cover 91, and the cantilever 904 stretches into the clamping hole 405; the two second side covers 902 are respectively arranged at two sides of the first side cover 91, the second side covers 902 are connected with the end cover 90 in an included angle manner, the second side covers 902 extend along the thickness direction of the battery cell 1, second clamping structures are arranged on the two second side covers 902, and the second side covers 902 are connected with the connecting structure through the second clamping structures and the first clamping structures; wherein, the end cover 90 and the second side cover 902 are both provided with an opening structure 901. By providing the opening structure 901 on the end cover 90 and the second side cover 902, the protection cover 9 can match various wire outgoing directions. The cantilever 904 can enhance the stability of the protective cover 9 in the height direction, so as to ensure that the protective cover 9 cannot fall off under the action of external load.

Specifically, the opening structure 901 is a virtual connection structure, and during installation, an installation side is selected, and the opening structure 901 which breaks the installation side forms an opening for the busbar 10 to extend into the busbar fixing position from the installation side, and is connected with the fastening nut 403 of the busbar fixing position by a bolt.

Further, the first clamping structure at least comprises a limiting groove 408, the limiting groove 408 extends along the height direction of the end plate body 41, the second clamping structure at least comprises a guiding structure 903, the guiding structure 903 extends along the height direction of the battery cell 1, and when the second side cover 902 is connected and matched with the connecting structure, at least part of the guiding structure 903 extends into the limiting groove 408. The guiding structure 903 can realize guiding in the installation process, and can realize a limiting effect on the protective cover 9 in the horizontal direction after extending into the limiting groove 408, so that the protective cover 9 is prevented from falling off under the action of external load.

In an exemplary embodiment of the present application, the first clamping structure further includes a clamping interface 406 and a limiting structure 407, and the clamping hole 405, the clamping interface 406, the limiting structure 407, and the limiting groove 408 are jointly clamped and fixedly assembled with the protective cover 9. Taking the side of one of the second side covers 902 as an installation test, as shown in fig. 11, after the busbar 10 is installed, the fastening hole 405 and the cantilever 904 form a fastening structure, the guiding structure 903 extends into the limiting slot 408, and after the cantilever 904 is fastened into the fastening hole 405, the second side cover 902 contacts with the limiting structure 407.

It should be noted that, in the present embodiment, the second side cover 902 is configured as a cover structure that is matched with the first clamping structure, for example, the edge shape of the second side cover 902 is preset, so that the second side cover 902 abuts against the limiting structure 407 after assembly.

Further, the buffer pads 2 and the heat insulation pads 3 are alternately arranged among the plurality of battery cells 1. The cushion pad 2 and the heat insulation pad 3 have good elasticity, can provide compression space when the electric core 1 is stacked and then put into the box body 7, so that electric core assembly is smoother, and meanwhile, the cushion pad 2 and the heat insulation pad 3 can provide pressure for the electric core 1 when the electric core group is put into the electric core containing cavity 101 to be contacted with the cavity wall. The safety of the battery module is guaranteed by using the buffer cushion 2 and the heat insulation pad 3 at intervals, and the cost of the battery module is reduced.

Preferably, the cushion pad 2 is made of all materials with buffering function such as aerogel pads, MPP foaming materials and rubber, the heat insulation pad 3 is made of all materials with heat insulation function such as aerogel pads, the length dimension of the cushion pad and the heat insulation pad is 10 mm-1500 mm, the width dimension is 10 mm-400 mm, and the thickness dimension is 0.5 mm-20 mm.

Specifically, in one exemplary embodiment of the present application, the end plate 4, the cushion 2, the heat insulation pad 3 and the battery cell 1 are all adhered by means of gluing. In combination with the previous embodiment, the end thermal insulation pad 401, the buffer pad 2 and the thermal insulation pad 3 together provide space for the battery cell 1 to enter the box, thereby improving the initial compression space, reducing the material cost and weight, improving the cycle life of the battery cell 1,

according to the diffusion requirement of the battery Bao Re, the space in the cavity of the box body 7 and the thickness and the material of the buffer pad 2, which are suitable for the battery system, fig. 14 shows a flow chart of a method for selecting the buffer pad 2 and the heat insulation pad 3, wherein the reference numerals represent the following meanings:

t is the cyclic expansion gap of the electric core, T is the thickness of a heat insulation material, a is the compression rate of the cushion after being put into a box, b is the compression rate of the heat insulation cushion after being put into the box, N1 is the number of the cushion, N2 is the number of the heat insulation cushions, c is the compression rate of the cushion when the electric cores are grouped, d is the compression rate of the heat insulation cushion when the electric cores are grouped, e is 1/2 of the distance between the electric core group and the frame of the box body, and Σ is the accumulated tolerance of parts.

Specifically, the method comprises the following steps:

step S1: confirming heat insulation and circulation requirements according to the internal arrangement of the battery pack and a battery core system;

step S2: determining the thickness T of the heat insulation material according to the property of the heat insulation material, and determining an expansion clearance value T according to the circulation requirement;

step S3: according to the proper circulating pressure of the battery cell, confirming the compression rate a after the cushion pad is put into the box and the compression rate b after the heat insulation pad is put into the box;

step S4: calculating the original thickness of the cushion pad 2 and the heat insulation pad 3;

step S5: calculating the compression size which needs to be met when the battery cells are assembled into a box for compression under the working condition of battery cell grouping;

step S6: calculating the compression size to be met after the pressure of the battery cell group is released under the working condition of box loading and releasing;

step S7: the compression ratio interval of the cushion pad 2 and the heat insulation pad 3 is determined through two working conditions.

Through the above steps, the heat insulation pad 3 and the buffer pad 2 are selected, the initial thickness and the compression ratio selection interval of the heat insulation pad 3 and the buffer pad 2 are provided, and compared with a scheme with lower selection cost, the cost of products is saved.

According to another embodiment of the present application, a vehicle is provided, the vehicle having a power battery, and the battery module of the power battery is the battery module described above. The power battery with the battery module in the embodiment has the advantages that the module electric connection component is highly integrated with the low-voltage sampling wire harness, the occupied space of the wire harness is reduced, the number of connectors and the butting frequency are reduced, the cost is reduced, the safety is improved, the battery cells are arranged in a single row, the frames are arranged around, the heat insulation materials are arranged between the battery cells in series, and the thermal safety of the whole pack is improved. The space occupancy of the battery cell is improved, the performance of the power battery is improved, and the problem of the endurance mileage of the vehicle in the prior art is effectively solved. Preferably, the vehicle in the present embodiment is an electric vehicle.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the invention.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module, comprising:

the battery pack comprises a box body (7), wherein a plurality of slave controller accommodating cavities (102) and battery core accommodating cavities (101) are arranged in the box body (7);

the battery cell group is multiple, the battery cell group is arranged in the battery cell accommodating cavity (101), the battery cell group at least comprises a plurality of battery cells (1), and the battery cells (1) are stacked along the thickness direction of the battery cells (1);

the high-low voltage integrated assemblies (5), wherein the high-low voltage integrated assemblies (5) are multiple, each high-low voltage integrated assembly (5) is connected with at least two cell groups, the high-low voltage integrated assemblies (5) are arranged in an extending mode along the thickness direction of the cell (1), and the high-low voltage integrated assemblies (5) are connected with the busbar (10);

the slave controller (8), the slave controller (8) set up in slave controller appearance chamber (102), slave controller (8) with high-low pressure integrated component (5) are connected.

2. The battery module according to claim 1, wherein the high-low voltage integrated assembly (5) includes:

an insulating film (501), wherein the insulating film (501) has a sheet-like structure, and the insulating films (501) are two, and the two insulating films (501) are arranged in an extending manner along the thickness direction of the battery cell (1);

the inter-cell bus bar assembly (502), the inter-cell bus bar assembly (502) is arranged between the two insulating films (501), the inter-cell bus bar assembly (502) extends along the thickness direction of the cell (1), and one end, close to the slave controller (8), of the inter-cell bus bar assembly (502) is connected with the bus bar (10);

the flexible circuit board assembly (503), the flexible circuit board assembly (503) is arranged between the two insulating films (501), the flexible circuit board assembly (503) extends along the thickness direction of the battery core (1), and one end of the flexible circuit board assembly (503) is connected with the slave controller (8);

the framework structures (506) are multiple, the framework structures (506) are arranged in a telescopic mode along the width direction of the insulating films (501), and the framework structures (506) are arranged on one insulating film (501);

and a plurality of bracket assemblies (505), wherein the bracket assemblies (505) are arranged along the width direction of the insulating film (501) in an extending manner.

3. The battery module according to claim 2, wherein the inter-cell busbar assembly (502) is a multi-layered aluminum sheet press-fit structure.

4. The battery module according to claim 2, wherein at least part of the outer surface of the high-low voltage integrated component (5) is covered with an insulating material (6).

5. The battery module according to claim 2, wherein the battery module comprises:

the end plates (4) are connected with the electric cores (1) positioned at the end parts of the electric core groups, end plate positioning structures (402) are arranged at the two ends of the end plates (4), abutting structures (404) are arranged on at least part of the surfaces of the end plates (4), and the end plate positioning structures (402) and the abutting structures (404) are arranged in abutting connection with the cavity walls of the electric core accommodating cavities (101);

the end plate (4) is provided with a busbar fixing position used for connecting the inter-cell busbar assembly (502) and the busbar (10).

6. The battery module according to claim 5, wherein the end plate (4) includes:

the battery cell module comprises an end plate body (41), wherein an end heat preservation pad (401) is arranged on the surface, close to the battery cell (1), of the end plate body (41), the surface, far away from the battery cell (1), of the end plate body (41) is provided with an abutting structure (404), and two ends of the end plate body (41) are respectively provided with an end plate positioning structure (402);

the battery cell comprises an end plate body (41), wherein at least one connecting structure is arranged on the end plate body, a first side face, a second side face, a third side face and a fourth side face are sequentially arranged along the circumferential direction of the connecting structure, the first side face faces the battery cell (1), the third side face is opposite to the first side face, the second side face is opposite to the fourth side face, a clamping hole (405) is formed in the third side face, and first clamping structures are arranged on the second side face and the fourth side face;

the end face of the connecting structure is provided with the busbar fixing position.

7. The battery module according to claim 5 or 6, wherein the busbar fixing position is provided with a fastening nut (403).

8. The battery module according to claim 6, further comprising a protective cover (9), the protective cover (9) comprising:

the end cover (90) is arranged along the length direction of the battery cell (1) in an extending mode;

the first side cover (91), the first side cover (91) is connected with the end cover (90) in an included angle manner, the first side cover (91) extends along the length direction of the battery cell (1), a cantilever (904) is arranged on the first side cover (91), and the cantilever (904) stretches into the clamping hole (405);

the two second side covers (902), the two second side covers (902) are respectively arranged at two sides of the first side cover (91), the second side covers (902) are connected with the end cover (90) in an included angle manner, the second side covers (902) are arranged along the thickness direction of the battery cell (1) in an extending manner, second clamping structures are arranged on the two second side covers (902), and the second side covers (902) are connected with the connecting structures through the second clamping structures and the first clamping structures;

wherein, the end cover (90) and the second side cover (902) are respectively provided with an opening structure (901).

9. The battery module according to claim 8, wherein the first clamping structure at least comprises a limiting groove (408), the limiting groove (408) extends along the height direction of the end plate body (41), the second clamping structure at least comprises a guiding structure (903), the guiding structure (903) extends along the height direction of the battery cell (1), and when the second side cover (902) is connected and matched with the connecting structure, at least part of the guiding structure (903) extends into the limiting groove (408).

10. The battery module according to claim 1, wherein a cushion (2) and a heat insulating pad (3) are alternately arranged between a plurality of the cells (1).

11. A vehicle having a power battery, characterized in that the battery module of the power battery is the battery module according to any one of claims 1 to 10.