CN110190229B

CN110190229B - Battery pack and vehicle

Info

Publication number: CN110190229B
Application number: CN201910569142.2A
Authority: CN
Inventors: 马腾; 曲凡多; 张佳佳; 魏艳彬
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2022-07-22
Anticipated expiration: 2039-06-27
Also published as: CN110190229A

Abstract

The invention provides a battery pack and a vehicle, the battery pack includes: lower casing, upper battery module, lower floor's battery module, module fixed knot construct, first compressing tightly piece and last casing. The upper-layer battery module is arranged above the lower-layer battery module; the module fixing structure is arranged in the lower shell and used for clamping the lower-layer battery module in the lower shell and fixing the upper-layer battery module in the battery pack; the first compressing piece is used for compressing and fixing the lower-layer battery module in the lower shell; the upper shell cover is arranged on the lower shell and connected with the lower shell. From this, through casing, upper battery module, lower floor battery module, module fixed knot construct, first compress tightly piece and the cooperation of last casing down, can simplify the assembly process and the structure of battery package, can promote the assembly efficiency of battery package, also can reduce the manufacturing cost of battery package to, also, can save the inner space of battery package, can promote the energy density of battery package.

Description

Battery pack and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a battery pack and a vehicle with the battery pack.

Background

Among the correlation technique, the battery module in the current battery package is provided with end plate and curb plate structure, and end plate and curb plate have increased the weight of battery module, have also occupied the space in the battery package, are unfavorable for the lightweight design of battery package and energy density's promotion. Also, the structure of the battery pack is complicated, resulting in high production costs of the battery pack.

Disclosure of Invention

In view of the above, the present invention is directed to a battery pack to solve the problems of complex structure and low energy density of the battery pack.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a battery pack includes: a lower housing; the battery pack comprises an upper battery module and a lower battery module, wherein the lower battery module and the lower battery module are both arranged in the battery pack, and the upper battery module is arranged above the lower battery module; the module fixing structure is arranged in the lower shell and used for clamping the lower-layer battery module in the lower shell and fixing the upper-layer battery module in the battery pack; the first pressing piece is used for pressing and fixing the lower-layer battery module in the lower shell; and the upper shell is covered on the lower shell and is connected with the lower shell.

In some examples of the invention, the lower housing includes: the body, the accommodation space is injectd to the body, module fixed knot constructs set up in the body, module fixed knot construct be used for with the lower floor battery module clamp of battery package is established in the accommodation space and with the upper battery module of battery package is fixed in the battery package.

In some examples of the invention, the module fixing structure includes: the middle pressing part and the side pressing part are arranged on the body and jointly define a module clamping space; the middle pressing part and the side pressing part are oppositely arranged and spaced.

In some examples of the invention, the battery pack further comprises: the binding band fixing plate is arranged on the middle pressing part, one end of the first pressing piece is connected with the binding band fixing plate, and the other end of the first pressing piece is connected with the body; the side pressing part is provided with an upper layer battery module fixing hole.

In some examples of the invention, the body has a first side sill, a floor, and a second side sill, the first and second side sills being disposed on respective first and second sides of the floor; the side pressure part includes: the first side pressing part is fixedly arranged on the first side edge beam, the second side pressing part is fixedly arranged on the second side edge beam, and the middle pressing part is arranged on the bottom plate; the medium-pressure part is positioned in the middle of the bottom plate.

In some examples of the invention, the battery pack further includes: the upper-layer battery module is arranged on the mounting bracket, and the mounting bracket is connected with the module fixing structure; the number of the lower-layer battery modules and the number of the upper-layer battery modules are multiple; the lower battery module is provided with an outer lower corner protector connected with the lower shell.

In some examples of the present invention, the upper battery module includes: the electric core assemblies are arranged side by side and/or in parallel; the middle lower connecting plate of the upper battery module is arranged between two adjacent rows of the electric core assemblies and is used for supporting and spacing the two adjacent rows of the electric core assemblies; the upper connecting plate in the middle of the upper battery module is arranged between two adjacent rows of the electric core assemblies and is used for compacting the two adjacent rows of the electric core assemblies at intervals; the upper part corner protector on the outer side of the upper battery module is arranged on the outer side of the outermost side of the battery core assembly, and the upper part corner protector on the outer side of the upper battery module is used for being connected with the mounting bracket; the lower part corner protector of the outer side of the upper battery module is arranged on the outer side of the outermost side of the electric core assembly and is positioned at the lower part of the outermost side of the electric core assembly, and the lower part corner protector of the outer side of the upper battery module is used for supporting the outermost side of the electric core assembly; the upper battery module upper cover sets up in the multiseriate the upper end of electric core subassembly and with upper portion connecting plate in the middle of the upper battery module upper portion angle bead in the upper battery module outside is connected.

In some examples of the present invention, the upper battery module further comprises: the middle end plate is arranged between two adjacent rows of the electric core assemblies which are arranged in parallel; the middle upper portion connecting plate of upper battery module with at least one in the upper portion angle bead in the upper battery module outside is provided with the third installation department, upper battery module upper cover be provided with be suitable for with the fourth installation department of third installation department joint.

In some examples of the invention, the battery pack further comprises: the upper surface of the third mounting part is provided with an upper-layer battery module binding band mounting groove, the second pressing part is positioned in the upper-layer battery module binding band mounting groove, and two ends of the second pressing part are respectively connected with the mounting bracket; the upper battery module further includes: one end of the middle bushing is connected with the supporting plate of the mounting bracket, and the other end of the middle bushing is connected with the second pressing piece.

Compared with the prior art, the battery pack has the following advantages:

according to the battery pack, the lower shell, the upper layer battery module, the lower layer battery module, the module fixing structure, the first pressing piece and the upper shell are matched, so that the assembly process and the structure of the battery pack can be simplified, the assembly efficiency of the battery pack can be improved, the production cost of the battery pack can be reduced, the internal space of the battery pack can be saved, and the energy density of the battery pack can be improved.

Another object of the invention is to propose a vehicle.

a vehicle comprises the battery pack.

The vehicle and the battery pack have the same advantages compared with the prior art, and the detailed description is omitted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

fig. 1 is a schematic view illustrating the assembly of a battery module and a lower case of a battery pack according to an embodiment of the present invention;

fig. 2 is an exploded view of a battery module and a lower case of a battery pack according to an embodiment of the present invention;

fig. 3 is a schematic view of a lower case of a battery pack according to an embodiment of the present invention;

fig. 4 is a schematic view of a mounting bracket of a battery pack according to an embodiment of the invention;

fig. 5 is a schematic view illustrating an assembly of a mounting bracket and an upper battery module of a battery pack according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating a lower battery module of a battery pack according to an embodiment of the present invention;

fig. 7 is an exploded view of a lower battery module of a battery pack according to an embodiment of the present invention;

fig. 8 is an exploded view of a lower battery module and a lower case of another embodiment of a battery pack according to an embodiment of the present invention;

fig. 9 is a schematic view of the lower battery module of fig. 8;

fig. 10 is a schematic view of an outer upper corner protector of a battery pack according to an embodiment of the present invention;

fig. 11 is a schematic view of an intermediate upper connecting plate of the battery pack according to the embodiment of the present invention;

fig. 12 is an exploded view of the electric core assembly of the battery pack according to the embodiment of the present invention;

fig. 13 is a schematic view of an upper battery module of a battery pack according to an embodiment of the present invention;

fig. 14 is a schematic view of an upper battery module according to another embodiment of a battery pack according to an embodiment of the present invention;

fig. 15 is a schematic view of an upper battery module of a battery pack according to an embodiment of the present invention assembled with a mounting bracket according to another embodiment;

FIG. 16 is a schematic view of a first fixture clamping an electric core assembly according to an embodiment of the present invention;

fig. 17 is a schematic view illustrating the first gripper clamping the electric core assembly into the second gripper according to the embodiment of the present invention;

fig. 18 is a schematic view of the electric core assemblies according to the embodiment of the present invention arranged side by side;

fig. 19 is a schematic view illustrating a lower battery module being clamped into a lower case by a first clamp according to an embodiment of the present invention;

fig. 20 is a schematic view of an outer lower corner protector of a lower battery module according to an embodiment of the present invention;

fig. 21 is a flowchart of a method for mounting a battery module in a battery pack according to an embodiment of the present invention.

Description of the reference numerals:

a lower case 10;

a body 1; a first side sill 11; a base plate 12; a second side beam 13;

a module fixing structure 2; a middle pressing part 21; a side pressing part 22; a module clamping space 23; upper-layer battery module fixing holes 24; a wire harness passage 25; a first side pressing portion 26; a second side pressing portion 27; a reinforcing structure 28;

a lower-layer battery module 3;

an upper layer battery module 4; an upper-layer battery module middle lower connection plate 41; an upper-middle battery module connecting plate 42; an upper outer corner 43 of the upper battery module; an upper-layer battery module outer-side lower corner bead 44; an upper battery module cover 45; a middle end plate 46; a third mounting portion 47; a fourth mounting portion 48; a second pressing member 49; an upper battery module strap mounting groove 491; an intermediate bushing 492;

a bandage fixing plate 5;

a battery module 20;

an electric core assembly 201; an elastic pad 2011; an electric core 2012; a shim 2013; a protection portion 2014; positioning holes 2015; a guide surface 2016;

an outer upper corner bead 202; a first corner bead 2021; a second corner bead 2022; a first mounting portion 2023; a clamping structure 2024; a first snap-fit structure 2025; a second clamping structure 2026; a snap groove 2027; a strap mounting slot 2028; a limiting rib 2029;

an outer lower corner bead 203; a third corner bead 2031; a fourth bead 2032; a mounting plate 2033; a reinforcing rib 2034;

an upper cover 204; a second mounting portion 2041; an upper cover body 2042; a second mounting assembly 2043; compressing the turnup 2044; a notch 2045;

an intermediate upper connecting plate 205; a first compression plate 2051; a first partition plate 2052;

an intermediate lower connecting plate 206; a second compression plate 2061; a second spacer 2062;

a mounting bracket 30;

an accommodating groove 301; a support plate 3011; a side panel 3012; bolt connection holes 3013; heating the film outlet gap 3014; side press connecting hole 3015;

an end fixing plate 302; strap attachment holes 3021; a first avoidance groove 3022; a second avoidance groove 3023;

a housing chamber 303;

the module outer lower corner guard 501;

the pressing fixture 60; a first plate 601; a second plate 602; a third plate 603; a second plate stiffener 604;

a first pressing member 701; an accommodating space 702;

a first clamp 80; a second clamp 801.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 20, a battery module 20 of a battery pack according to an embodiment of the present invention includes: multiple rows of electric core assemblies 201, intermediate connecting plates, outside corner protectors and upper covers 204. Multiseriate electric core subassembly 201 arranges side by side, and intermediate junction plate sets up between adjacent two electric core subassembly 201, and intermediate junction plate is used for compressing tightly and the adjacent two electric core subassembly 201 of interval, and it needs to explain, and intermediate junction plate can bond together with adjacent two electric core subassembly 201, sets up like this and can connect two or multiseriate electric core subassembly 201 as a whole, can realize that a battery module 20 includes multiseriate electric core subassembly 201's work purpose.

The outside angle bead sets up in the outside of outside core subassembly 201, and the outside angle bead is used for compressing tightly the core subassembly 201 in the outside, and the outside angle bead is connected with the lower casing 10 of battery package moreover. Wherein, the back is in the same place in multiseriate electric core subassembly 201, intermediate junction board and outside angle bead assembly, presss from both sides battery module 20 in the lower casing 10 of battery package, then links together outside angle bead and the lower casing 10 of battery package, sets up like this and can fix battery module 20 on lower casing 10 to can realize the work purpose of fixed battery module 20. And, compare with the battery module among the prior art, the battery module 20 of this application need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20, can reduce battery module 20's manufacturing cost and weight, thereby can realize battery module 20's lightweight design, and simultaneously, also can save the inner space of battery package, thereby can promote the energy density of battery package, additionally, also can simplify battery module 20's structure, can be convenient for battery module 20's production and manufacturing, thereby can promote battery module 20's assembly efficiency, and then can promote battery module 20's production efficiency.

In addition, compared to the battery module in the related art, the arrangement of the end plates and the side plates 3012 is omitted, so that the conventional welding process of the end plates and the side plates 3012 can be reduced, and the amount of structural adhesive used can also be reduced. Meanwhile, a large area of the surface of the battery cell 2012 can be exposed, so that heating or cooling of the battery cell 2012 can be facilitated.

The upper cover 204 is disposed at the upper end of the multiple rows of the electric core assembly 201 and connected to at least one of the intermediate connection plate and the outer corner protector, and it should be explained that the upper cover 204 is disposed above the multiple rows of the electric core assembly 201, and the upper cover 204 may be connected to only the intermediate connection plate, only the outer corner protector, and both the intermediate connection plate and the outer corner protector. Wherein, after battery module 20 assembly accomplished, upper cover 204 links together with intermediate junction board and/or outside angle bead, can assemble upper cover 204 reliably on battery module 20, can prevent that upper cover 204 from breaking away from battery module 20, also can avoid upper cover 204 not hard up, and, upper cover 204 can play the guard action to the spare part between electric core subassembly 201 and the upper cover 204, can avoid the spare part between electric core subassembly 201 and the upper cover 204 to receive external environment and damage, thereby can guarantee battery module 20's operational reliability.

From this, through multiseriate electric core subassembly 201, intermediate junction board, outside angle bead and upper cover 204 cooperation, compare with the battery module among the prior art, the battery module 20 of this application need not set up end plate and curb plate 3012, can save the inner space of battery package to can promote the energy density of battery package, also can realize the lightweight setting of battery package, and, can also promote the assembly efficiency of battery module 20, thereby can promote the production efficiency of battery module 20.

In some embodiments of the present invention, as shown in fig. 7, the intermediate connection plate may include: an intermediate lower connecting plate 206 and an intermediate upper connecting plate 205. The middle lower connecting plate 206 is disposed between two adjacent columns of the electric core assemblies 201, and the middle lower connecting plate 206 is used for supporting and spacing two adjacent columns of the electric core assemblies 201. It should be noted that the middle lower connecting plate 206 can be adhered to two adjacent rows of cell assemblies 201, so as to ensure that the middle lower connecting plate 206 is reliably connected to the cell assemblies 201, and can also restrain the cell assemblies 201.

Middle upper portion connecting plate 205 sets up between two adjacent electric core subassemblies 201, and middle upper portion connecting plate 205 is used for compressing tightly and two adjacent electric core subassemblies 201 in interval, and wherein, middle upper portion connecting plate 205 can bond together with two adjacent electric core subassemblies 201 to can ensure that middle upper portion connecting plate 205 is reliably connected with electric core subassembly 201, also can retrain electric core subassembly 201 better.

In some embodiments of the invention, as shown in fig. 7, the outboard corner protector may comprise: an outboard upper corner bead 202 and an outboard lower corner bead 203. The outer upper corner bead 202 may be disposed outside the outermost core assembly 201 and on the outermost core assembly 201, and the outer upper corner bead 202 is used to press the outermost core assembly 201. The outer lower corner protectors 203 are arranged on the outer sides of the outermost cell assemblies 201 and located at the lower parts of the outermost cell assemblies 201, and the outer lower corner protectors 203 are used for supporting the outermost cell assemblies 201 and connected with the lower shell 10 of the battery pack.

As shown in fig. 1 to 20, the battery module 20 may be an upper battery module 4 in a battery pack, or may be a lower battery module 3 in a battery pack, and the outer corner protector of the battery module 20 includes: an outboard upper corner bead 202 and an outboard lower corner bead 203. The multiple columns of electric core assemblies 201 are arranged side by side, the outer upper corner protectors 202 are arranged on the outer sides of the outermost electric core assemblies 201, the outer upper corner protectors 202 are located on the upper portions of the outermost electric core assemblies 201, and the outer upper corner protectors 202 are used for pressing the outermost electric core assemblies 201. It should be noted that the outer upper corner bead 202 may be disposed at a shoulder position of the core assembly 201. The outer lower corner bead 203 is disposed at the outer side of the outermost core assembly 201, and the outer lower corner bead 203 is located at the lower portion of the outermost core assembly 201, and the outer lower corner bead 203 is used for holding the outermost core assembly 201 and being connected to the lower case 10 of the battery pack, it should be explained that the outer lower corner bead 203 and the outer upper corner bead 202 together press the core assembly 201, and the outer lower corner bead 203 and the outer upper corner bead 202 can be adhered to the core assembly 201.

After the electric core assembly 201, the outer upper corner bead 202 and the outer lower corner bead 203 are assembled together, the battery module 20 is clamped in the lower casing 10 of the battery pack, and then the outer lower corner bead 203 is connected with the lower casing 10 of the battery pack, so that the battery module 20 can be fixed on the lower casing 10, and the work purpose of fixing the battery module 20 can be achieved. And, compare with the battery module among the prior art, the battery module 20 of this application need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20, can reduce battery module 20's manufacturing cost and weight, thereby can realize battery module 20's lightweight design, and simultaneously, also can save the inner space of battery package, thereby can promote the energy density of battery package, additionally, also can simplify battery module 20's structure, can be convenient for battery module 20's production and manufacturing, thereby can promote battery module 20's assembly efficiency, and then can promote battery module 20's production efficiency.

In some embodiments of the present invention, as shown in fig. 10, the outboard upper corner bead 202 may include: the first corner bead 2021 and the second corner bead 2022, the second corner bead 2022 can be disposed on the first corner bead 2021, and the second corner bead 2022 is located under the first corner bead 2021, the first corner bead 2021 is suitable for abutting against the upper surface of the outermost electric core assembly 201, and the second corner bead 2022 is suitable for abutting against the side surface of the outermost electric core assembly 201. Wherein, first angle bead 2021 and the last surface bonding of electric core subassembly 201 are in the same place, and second angle bead 2022 and the side surface bonding of electric core subassembly 201 are in the same place, so set up and to compress tightly electric core subassembly 201, can make electric core subassembly 201's overall structure compacter to, first angle bead 2021 and second angle bead 2022 can play the guard action to electric core subassembly 201, can prevent that electric core subassembly 201 from receiving external spare part and damaging.

In some embodiments of the present invention, as shown in fig. 20, the outboard lower corner bead 203 may comprise: a third corner bead 2031 and a fourth corner bead 2032, the fourth corner bead 2032 can be disposed on the third corner bead 2031, and the fourth corner bead 2032 is located above the third corner bead 2031, the third corner bead 2031 is suitable for abutting against the lower surface of the outermost electric core assembly 201, and the fourth corner bead 2032 is suitable for abutting against the side surface of the outermost electric core assembly 201. Wherein, the third angle bead 2031 can be in the same place with the lower surface bonding of electric core subassembly 201, the fourth angle bead 2032 can be in the same place with the side surface bonding of electric core subassembly 201, cooperate through outside upper portion angle bead 202 and outside lower part angle bead 203, can compress tightly electric core subassembly 201, can make electric core subassembly 201's overall structure compacter, and, third angle bead 2031 and fourth angle bead 2032 can play the guard action to electric core subassembly 201, can prevent that electric core subassembly 201 from receiving external spare part and damaging.

In some embodiments of the present invention, as shown in fig. 20, the outer lower corner bead 203 may further include: a mounting plate 2033, the mounting plate 2033 may be disposed on an outer surface of the fourth corner bead 2032, and the mounting plate 2033 is adapted to be connected to the lower case 10 of the battery pack. Wherein, after the battery module 20 is placed in the lower case 10, the mounting plate 2033 may be assembled with the lower case 10 by bolts, so that the battery module 20 may be stably assembled on the lower case 10, and the position stability of the battery module 20 may be ensured.

In some embodiments of the present invention, as shown in fig. 20, the outer surfaces of the second corner bead 2022 and the fourth corner bead 2032 may be provided with a reinforcing rib 2034, such that the structural strength of the second corner bead 2022 and the fourth corner bead 2032 can be improved, and the deformation of the second corner bead 2022 and the fourth corner bead 2032 can be avoided, so that the outer upper corner bead 202 and the outer lower corner bead 203 can better fix and protect the electric core assembly 201.

In some embodiments of the present invention, each of the first corner bead 2021, the second corner bead 2022, the third corner bead 2031, and the fourth corner bead 2032 may be configured as a flat plate, which is configured to make the surface of the first corner bead 2021, the second corner bead 2022, the third corner bead 2031, and the fourth corner bead 2032 more flat, so that the first corner bead 2021, the second corner bead 2022, the third corner bead 2031, and the fourth corner bead 2032 can be better assembled with the electrical core assembly 201.

In some embodiments of the present invention, as shown in fig. 11, the intermediate upper connection plate 205 may include: a first pressing plate 2051 and a first partition plate 2052, the first partition plate 2052 may be disposed below the first pressing plate 2051, and the first partition plate 2052 may be located at a middle position of the first pressing plate 2051. Wherein, first spacer plate 2052 is located between two adjacent columns of battery core subassemblies 201, and first spacer plate 2052 can guarantee to have the clearance between two adjacent columns of battery core subassemblies 201 to, first pressure strip 2051 presses in the upper end of two adjacent columns of battery core subassemblies 201, can make battery core subassembly 201's structure compacter.

In some embodiments of the present invention, as shown in FIG. 7, the intermediate lower connecting plate 206 may comprise: a second pressing plate 2061 and a second spacer plate 2062, the second spacer plate 2062 may be disposed above the second pressing plate 2061, and the second spacer plate 2062 is located at a middle position of the second pressing plate 2061. Wherein, the second spacer plate 2062 is located between two adjacent electric core assemblies 201, the second spacer plate 2062 can guarantee to have the clearance between two adjacent electric core assemblies 201, and, the second pressure strip 2061 holds in the palm at two adjacent lower extremes of electric core assemblies 201, through the cooperation of first pressure strip 2051 and second pressure strip 2061, can make electric core assembly 201's structure compacter, and, the bottom surface of second pressure strip 2061 is the plane, the bottom surface of second pressure strip 2061 contacts with lower casing 10, can prevent the surface of casing 10 direct wear electric core assembly 201 down, thereby can prolong electric core assembly 201's life.

In some embodiments of the present invention, at least one of the intermediate upper tie plate 205 and the outboard upper corner protector 202 is provided with a first mounting portion 2023. The first attachment portion 2023 may be provided only on the intermediate upper connection plate 205, only on the outer upper corner bead 202, or both of the intermediate upper connection plate 205 and the outer upper corner bead 202.

As shown in fig. 1-7, the upper cover 204 may be provided with a second mounting portion 2041 adapted to snap fit with the first mounting portion 2023. The upper cover 204 of the battery module 20 according to the embodiment of the present invention includes: the upper cover body 2042 and the upper cover body 2042 are disposed at the upper end of the battery cell assembly 201 in the battery module 20, and it can also be understood that the upper cover body 2042 is disposed above the battery cell assembly 201, and the upper cover body 2042 is provided with a second mounting portion 2041 adapted to be connected to the first mounting portion 2023, and it should be explained that the first mounting portion 2023 and the second mounting portion 2041 may be fastened together.

Wherein, after the assembly of battery module 20 was accomplished, first installation department 2023 is in the same place with second installation department 2041 joint, can assemble upper cover 204 on battery module 20 reliably, can prevent that upper cover 204 from breaking away from battery module 20, also can avoid upper cover 204 not hard up, and, upper cover 204 can play the guard action to the spare part between electric core subassembly 201 and the upper cover 204, can avoid the spare part between electric core subassembly 201 and the upper cover 204 to receive external environment and damage, thereby can guarantee battery module 20's operational reliability. Meanwhile, the upper cover 204 can be quickly assembled on the battery module 20 by clamping the first mounting part 2023 and the second mounting part 2041, so that the assembly time of the upper cover 204 can be saved, and the assembly efficiency of the battery module 20 can be improved.

In some embodiments of the invention, one of the first mounting portion 2023 and the second mounting portion 2041 is provided as a boss and the other of the first mounting portion 2023 and the second mounting portion 2041 is provided as a mounting hole through which the boss can pass. It should be noted that the second mounting portion 2041 may be configured as one of a boss and a mounting hole, if the first mounting portion 2043 is configured as a boss, the second mounting portion 2041 is configured as a mounting hole, and if the second mounting portion 2041 is configured as a boss, the first mounting portion 2023 is configured as a mounting hole, so that the work purpose of clamping the first mounting portion 2023 and the second mounting portion 2041 can be achieved, and the structure of the first mounting portion 2023 and the second mounting portion 2041 can be simplified, thereby facilitating the production and manufacture of the first mounting portion 2023 and the second mounting portion 2041. However, the present invention is not limited thereto, and the first mounting portion 2023 and the second mounting portion 2041 may be configured to function as the boss and the mounting hole, as long as the first mounting portion 2023 and the second mounting portion 2041 are snapped together.

In some embodiments of the present invention, the second mounting portions 2041 may be provided in plurality, wherein the first mounting portions 2023 may also be provided in plurality, the plurality of second mounting portions 2041 correspond to the plurality of first mounting portions 2023 one to one, and the plurality of second mounting portions 2041 are connected to the plurality of first mounting portions 2023, so that the upper cover 204 can be more stably assembled on the battery module 20, the upper cover 204 can be prevented from falling off from the battery module 20, and the positional stability of the upper cover 204 can be improved.

In some embodiments of the present invention, the plurality of second mounting portions 2041 may be divided into a plurality of sets of second mounting assemblies 2043, it should be noted that each set of second mounting assemblies 2043 may form a row, and the plurality of sets of second mounting assemblies 2043 are arranged in parallel, so that the second mounting portions 2041 in two adjacent sets of second mounting assemblies 2043 can be prevented from interfering with each other, and the reliability of the assembly of the second mounting portions 2041 and the first mounting portion 2023 can be ensured.

In some embodiments of the present invention, the two adjacent sets of second mounting assemblies 2043 are spaced apart from each other, so that the second mounting portions 2041 of the two adjacent sets of second mounting assemblies 2043 can be further prevented from interfering with each other, and the reliability of the assembly of the second mounting portions 2041 and the first mounting portion 2023 can be further ensured.

In some embodiments of the present invention, each set of second mounting assemblies 2043 is arranged along the length direction of the electric core assembly 201 of the battery module 20, that is, the arrangement direction of the second mounting assemblies 2043 may be the length direction of the electric core assembly 201, i.e., the left-right direction in fig. 7, wherein since the middle upper connecting plate 205 and the outer upper corner protectors 202 are arranged between two adjacent columns of electric core assemblies 201, and the extending direction of the middle upper connecting plate 205 and the outer upper corner protectors 202 is the length direction of the electric core assembly 201, such arrangement enables the second mounting assemblies 2043 to be arranged in the same direction as the arrangement direction of the middle upper connecting plate 205 and the outer upper corner protectors 202, and it is ensured that the second mounting assemblies 2041 and the first mounting assemblies 2023 can be assembled together.

In some embodiments of the invention, the second mounting portion 2041 may be provided as a mounting hole.

In some embodiments of the present invention, as shown in fig. 7, in the circumferential direction of the upper cover body 2042, the edge of the upper cover body 2042 may be provided with a pressing flange 2044, after the battery module 20 is assembled, the pressing flange 2044 may press the outer upper corner bead 202 of the battery module 20, so as to prevent the outer upper corner bead 202 from separating from the electric core assembly 201, and further ensure the reliability of the assembly of the electric core assembly 201 and the outer upper corner bead 202, and further, the pressing flange 2044 presses the outer upper corner bead 202, so as to make the structure of the battery module 20 more compact, and thus prevent the electric core assembly 201 from loosening.

In some embodiments of the present invention, as shown in fig. 7, a gap 2045 may be provided on the pressing flange 2044, wherein after the electric core assemblies 201 are assembled on the lower casing 10 of the battery pack, two adjacent electric core assemblies 201 are connected through the conductive bar, and by providing the gap 2045, the gap 2045 can avoid the conductive bar, so as to achieve the working purpose of electrical connection between two adjacent electric core assemblies 201.

In some embodiments of the present invention, as shown in fig. 10, a clamping structure 2024 may be disposed on a peripheral wall of the first mounting portion 2023, and the clamping structure 2024 may include: the first clamping structure 2025 and the second clamping structure 2026 are arranged oppositely and spaced apart from each other, so that a clamping groove 2027 can be formed between the first clamping structure 2025 and the second clamping structure 2026, when the first mounting portion 2023 is arranged as a boss and the second mounting portion 2041 is arranged as a mounting hole, the edge of the mounting hole is clamped in the clamping groove 2027, so that the first mounting portion 2023 and the second mounting portion 2041 can be stably assembled together, and the upper cover 204 can be prevented from being loosened.

In some embodiments of the present invention, as shown in fig. 10 and 11, the upper surface of the first mounting portion 2023 has a strap mounting groove 2028. It should be noted that, when the battery module 20 is the lower battery module 3, after the lower battery module 3 is clamped in the lower case 10, the lower battery module 3 is pressed in the lower case 10 by using a binding band, wherein the binding band can be installed in the binding band installation groove 2028, and the binding band installation groove 2028 can limit the position of the binding band, thereby improving the position stability of the binding band, preventing the position of the binding band from moving, and further pressing the battery module 20 by the binding band.

In some embodiments of the present invention, as shown in fig. 12, each column of the core assembly 201 may include: elastic pad 2011 and a plurality of electric core 2012, a plurality of electric core 2012 stack together in proper order, elastic pad 2011 can set up between adjacent electric core 2012, elastic pad 2011 can bond together with electric core 2012 through gluing, elastic pad 2011 is preferably the aerogel felt, it can keep two adjacent electric core 2012 to have the interval to set up like this, elastic pad 2011 has the effect of absorbing electric core 2012 and bulging, and, elastic pad 2011 has good heat-proof quality, be used for the heat that the production of separation single electric core 2012, can avoid on the electric core 2012 heat transfer to on the adjacent electric core 2012.

In some embodiments of the present invention, as shown in fig. 12, the electric core assembly 201 may further include: gasket 2013 and protection 2014, in the stacking direction of a plurality of cells 2012, protection 2014 can be arranged outside the outermost cells 2012, protection 2014 is preferably made of injection molding material, and protection 2014 is used for resisting end friction of the electric core assembly 201 in the assembling process and can protect the end of the electric core assembly 201. The gasket 2013 may be disposed between the protection portion 2014 and the outermost cell 2012, the gasket 2013 is preferably of a rubber structure, the thickness of the gasket 2013 is 2-8mm, and two sides of the gasket 2013 are connected to the cell 2012 and the protection portion 2014 through glue.

The surface of protection portion 2014 can be provided with locating hole 2015 and guide surface 2016, wherein, when installation battery module 20, can use anchor clamps to press from both sides battery module 20 and put into down on casing 10 with battery module 20, anchor clamps can be in the same place with locating hole 2015 cooperation after through guide surface 2016 to can be convenient for anchor clamps and the location of protection portion 2014, and then can make things convenient for anchor clamps to press from both sides battery module 20.

In some embodiments of the present invention, the third bead 2031 is at the same height as the second compression plate 2061 in the up-down direction of the battery module 20, so that the battery module 20 can be smoothly mounted on the lower case 10 when the battery module 20 is mounted on the lower case 10, and the inclination of the battery module 20 can be prevented.

Specifically, after the multiple rows of the electric core assemblies 201 are assembled with the middle connecting plate and the outer side corner protector, one battery module 20 is formed, the battery modules 20 are assembled and then are connected with the bus bar and the sampling wire harness in a centralized manner, and then the upper cover 204 is covered, so that the assembly work of the battery module 20 is completed. Moreover, the design scheme of the present application may also be used to form the battery module 20 by using a single-column cell assembly 201, and the battery module may be assembled by directly using the outer corner protector after stacking a plurality of cells 2012.

According to the battery module 20 of the embodiment of the invention, the upper cover 204 comprises the upper cover 204 of the above embodiment, the upper cover 204 is arranged and installed on the battery module 20, the upper cover 204 can be quickly assembled on the battery module 20, the assembling time of the upper cover 204 can be saved, the assembling efficiency of the battery module 20 can be improved, the upper cover 204 can be stably assembled on the battery module 20, and the looseness of the upper cover 204 can be avoided.

As shown in fig. 1 to 20, a battery module 20 of a battery pack according to an embodiment of the present invention includes: multiple columns of electric core components 201, middle connecting plates, outer side corner protectors, pressing fixing pieces 60 and upper covers 204. Multiseriate electric core subassembly 201 arranges side by side, and intermediate junction plate sets up between adjacent two electric core subassembly 201, and intermediate junction plate is used for compressing tightly and the adjacent two electric core subassembly 201 of interval, and it needs to explain, and intermediate junction plate can bond together with adjacent two electric core subassembly 201, sets up like this and can connect two or multiseriate electric core subassembly 201 as a whole, can realize that a battery module 20 includes multiseriate electric core subassembly 201's work purpose.

The outside angle bead sets up in the outside of outside electric core subassembly 201, and the outside angle bead is used for compressing tightly the electric core subassembly 201 in the outside. After the multi-column battery pack assembly 201, the intermediate connecting plate, the outer corner protector and the pressing fixing piece 60 are assembled together, the battery module 20 is clamped in the lower shell 10 of the battery pack, and then the pressing fixing piece 60 is connected with the lower shell 10 of the battery pack, so that the battery module 20 can be fixed on the lower shell 10, and the working purpose of fixing the battery module 20 can be achieved. And, compare with the battery module among the prior art, battery module 20 of this application need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20, can reduce battery module 20's manufacturing cost and weight, thereby can realize battery module 20's lightweight design, and simultaneously, also can save the inner space of battery package, thereby can promote battery package's energy density, in addition, also can simplify battery module 20's structure, can be convenient for battery module 20's production and manufacturing, thereby can promote battery module 20's assembly efficiency, and then can promote battery module 20's production efficiency.

In addition, compared to the battery module in the related art, the arrangement of the end plates and the side plates 3012 is omitted, so that the conventional welding process of the end plates and the side plates 3012 can be reduced, and the amount of structural adhesive used can also be reduced. Meanwhile, a large area of the surface of the battery cell 2012 can be exposed, so that the battery cell 2012 can be heated or cooled advantageously.

From this, through setting up intermediate junction board, outside angle bead, compressing tightly mounting 60 and upper cover 204, compare with the battery module among the prior art, battery module 20 of this application need not set up end plate and curb plate 3012, can save the inner space of battery package to can promote the energy density of battery package, also can realize the lightweight setting of battery package, and, can also promote battery module 20's assembly efficiency, thereby can promote battery module 20's production efficiency.

In some embodiments of the present invention, as shown in fig. 7, the intermediate connection plate may include: an intermediate lower connecting plate 206 and an intermediate upper connecting plate 205. The middle lower connecting plate 206 is arranged between two adjacent columns of the cell assemblies 201, and the middle lower connecting plate 206 is used for supporting and spacing two adjacent columns of the cell assemblies 201. It should be noted that the middle lower connecting plate 206 can be adhered to two adjacent rows of cell assemblies 201, so as to ensure the reliable connection between the middle lower connecting plate 206 and the cell assemblies 201, and also to restrain the cell assemblies 201.

In some embodiments of the present invention, as shown in fig. 8 and 9, the outside corner protector may include: an outboard upper corner bead 202 and a module outboard lower corner bead 501. The outer upper corner bead 202 may be disposed outside the outermost core assembly 201 and on the outermost core assembly 201, and the outer upper corner bead 202 is used to press the outermost core assembly 201. The module outer lower corner protector 501 is disposed outside the outermost cell assembly 201 and located below the outermost cell assembly 201, and the module outer lower corner protector 501 is used for supporting the outermost cell assembly 201.

The battery module 20 may be an upper battery module 4 in a battery pack, or may be a lower battery module 3 in a battery pack, and the outer corner protector of the battery module 20 includes: an outboard upper corner bead 202 and a module outboard lower corner bead 501. The multiple columns of electric core assemblies 201 are arranged side by side, the outer upper corner protectors 202 are arranged on the outer sides of the outermost electric core assemblies 201, the outer upper corner protectors 202 are located on the upper portions of the outermost electric core assemblies 201, and the outer upper corner protectors 202 are used for pressing the outermost electric core assemblies 201. It should be noted that the outer upper corner bead 202 may be disposed at a shoulder position of the core assembly 201. Module outside lower part angle bead 501 sets up in the outside of outside core subassembly 201 to module outside lower part angle bead 501 is located the lower part of outside core subassembly 201, and module outside lower part angle bead 501 is used for holding the core subassembly 201 in the outside, and it should be explained that module outside lower part angle bead 501 and outside upper part angle bead 202 compress tightly core subassembly 201 jointly, and module outside lower part angle bead 501 and outside upper part angle bead 202 all can be in the same place with core subassembly 201 bonding.

After the multi-column battery pack assembly 201, the outer upper corner protector 202, the module outer lower corner protector 501 and the pressing fixing member 60 are assembled together, the battery module 20 is clamped in the lower casing 10 of the battery pack, and then the pressing fixing member 60 is connected with the lower casing 10 of the battery pack, so that the battery module 20 can be fixed on the lower casing 10, and the working purpose of fixing the battery module 20 can be achieved. And, compare with the battery module among the prior art, the battery module 20 of this application need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20, can reduce battery module 20's manufacturing cost and weight, thereby can realize battery module 20's lightweight design, and simultaneously, also can save the inner space of battery package, thereby can promote the energy density of battery package, additionally, also can simplify battery module 20's structure, can be convenient for battery module 20's production and manufacturing, thereby can promote battery module 20's assembly efficiency, and then can promote battery module 20's production efficiency.

In some embodiments of the present invention, as shown in fig. 10, the outboard upper corner bead 202 may include: the first corner protector 2021 and the second corner protector 2022, the second corner protector 2022 may be disposed on the first corner protector 2021, and the second corner protector 2022 is located below the first corner protector 2021, the first corner protector 2021 is adapted to abut against an upper surface of the outermost electric core assembly 201, and the second corner protector 2022 is adapted to abut against a side surface of the outermost electric core assembly 201. Wherein, first angle bead 2021 and the last surface bonding of electric core subassembly 201 are in the same place, and second angle bead 2022 and the side surface bonding of electric core subassembly 201 are in the same place, so set up and to compress tightly electric core subassembly 201, can make electric core subassembly 201's overall structure compacter to, first angle bead 2021 and second angle bead 2022 can play the guard action to electric core subassembly 201, can prevent that electric core subassembly 201 from receiving external spare part and damaging.

In some embodiments of the present invention, as shown in fig. 20, the module outside lower corner protectors 501 may comprise: a third corner bead 2031 and a fourth corner bead 2032, the fourth corner bead 2032 can be disposed on the third corner bead 2031, and the fourth corner bead 2032 is located above the third corner bead 2031, the third corner bead 2031 is suitable for abutting against the lower surface of the outermost electric core assembly 201, and the fourth corner bead 2032 is suitable for abutting against the side surface of the outermost electric core assembly 201. Wherein, the third angle bead 2031 can be in the same place with the lower surface bonding of electric core subassembly 201, the fourth angle bead 2032 can be in the same place with the side surface bonding of electric core subassembly 201, cooperate through outside upper portion angle bead 202 and outside lower part angle bead 203, can compress tightly electric core subassembly 201, can make electric core subassembly 201's overall structure compacter, and, third angle bead 2031 and fourth angle bead 2032 can play the guard action to electric core subassembly 201, can prevent that electric core subassembly 201 from receiving external spare part and damaging.

In some embodiments of the present invention, as shown in fig. 8 and 9, the compression fixture 60 may include: a first plate 601, a second plate 602, and a third plate 603, the second plate 602 being coupled between the first plate 601 and the third plate 603, the first plate 601 being pressed against the upper end of the outer upper corner bead 202, and the third plate 603 being coupled to the lower case 10. Wherein, compress tightly the mounting 60 and can set up to the panel beating material, set up like this and can guarantee to compress tightly the structural strength of mounting 60, can guarantee to compress tightly the compression strength of mounting 60 to can make and compress tightly mounting 60 and compress tightly battery module 20 on lower casing 10 firmly. The present invention is not limited thereto and the pressing fixture 60 may be provided in other structures as long as the battery module 20 can be pressed in the lower case 10.

In some embodiments of the present invention, as shown in fig. 9, the second plate 602 may be provided with second plate reinforcing ribs 604, and the second plate reinforcing ribs 604 have a function of reinforcing structural strength, so that the structural strength of the pressing fixture 60 can be increased, and the pressing strength of the pressing fixture 60 can be further ensured, so that the pressing fixture 60 can further firmly press the battery module 20 against the lower case 10.

In some embodiments of the present invention, as shown in fig. 11, the intermediate upper connection plate 205 may include: a first pressing plate 2051 and a first partition plate 2052, the first partition plate 2052 may be disposed below the first pressing plate 2051, and the first partition plate 2052 may be located at a middle position of the first pressing plate 2051. Wherein, first space bar 2052 is located between two adjacent columns of electric core subassembly 201, and first space bar 2052 can guarantee to have the clearance between two adjacent columns of electric core subassembly 201 to, first pressure strip 2051 presses in the upper end of two adjacent columns of electric core subassembly 201, can make electric core subassembly 201's structure compacter.

In some embodiments of the present invention, as shown in FIG. 7, the intermediate lower connecting plate 206 may comprise: a second pressing plate 2061 and a second spacer plate 2062, the second spacer plate 2062 may be disposed above the second pressing plate 2061, and the second spacer plate 2062 is located at a middle position of the second pressing plate 2061. Wherein, second partition plate 2062 is located between two adjacent electric core subassembly 201, second partition plate 2062 can guarantee to have the clearance between two adjacent electric core subassembly 201, and, second pressure strip 2061 holds in the palm the lower extreme at two adjacent electric core subassembly 201, cooperate through first pressure strip 2051 and second pressure strip 2061, can make electric core subassembly 201's structure compacter, and, the bottom surface of second pressure strip 2061 is the plane, the bottom surface and the lower casing 10 of second pressure strip 2061 contact, can prevent the surface of casing 10 direct wear electric core subassembly 201 down, thereby can prolong electric core subassembly 201's life.

In some embodiments of the present invention, at least one of the intermediate upper connecting plate 205 and the outboard upper corner guard 202 is provided with a first mounting portion 2023. The first attachment portion 2023 may be provided only on the intermediate upper connection plate 205, only on the outer upper corner bead 202, or both of the intermediate upper connection plate 205 and the outer upper corner bead 202.

As shown in fig. 7, the upper cover 204 may be provided with a second mounting portion 2041 adapted to snap-fit with the first mounting portion 2023. The upper cover 204 of the battery module 20 according to the embodiment of the present invention includes: the upper cover body 2042 and the upper cover body 2042 are disposed on the upper end of the battery cell assembly 201 in the battery module 20, and it can also be understood that the upper cover body 2042 is disposed above the battery cell assembly 201, and the upper cover body 2042 is provided with the second mounting portion 2041 adapted to be connected to the first mounting portion 2023, it should be explained that the first mounting portion 2023 and the second mounting portion 2041 may be connected together in a clamping manner.

In some embodiments of the present invention, as shown in fig. 10 and 11, a clamping structure 2024 may be disposed on a peripheral wall of the first mounting portion 2023, and the clamping structure 2024 may include: the first clamping structure 2025 and the second clamping structure 2026 are arranged oppositely and spaced apart from each other, so that a clamping groove 2027 can be formed between the first clamping structure 2025 and the second clamping structure 2026, when the first mounting portion 2023 is arranged as a boss and the second mounting portion 2041 is arranged as a mounting hole, the edge of the mounting hole is clamped in the clamping groove 2027, so that the first mounting portion 2023 and the second mounting portion 2041 can be stably assembled together, and the upper cover 204 can be prevented from being loosened.

In some embodiments of the present invention, as shown in fig. 11, the upper surface of the first mounting portion 2023 of the intermediate upper connecting plate 205 has a strap mounting groove 2028. It should be noted that, when the battery module 20 is the lower layer battery module 3, after the lower layer battery module 3 is clamped in the lower casing 10, the lower layer battery module 3 is pressed in the lower casing 10 by using a binding band, wherein the binding band can be installed in the binding band installation groove 2028, the binding band installation groove 2028 can limit the binding band, so as to improve the position stability of the binding band, thereby preventing the position of the binding band from moving, and further pressing the battery module 20 by using the binding band.

In some embodiments of the present invention, as shown in fig. 10, the upper surface of the first mounting portion 2023 of the outer upper corner bead 202 has a limiting rib 2029 for stopping the first plate 601, wherein when the first plate 601 is assembled in place, the limiting rib 2029 can limit the first plate 601, so that an operator can know that the pressing fixture 60 is assembled in place, thereby ensuring that the pressing fixture 60 is mounted in place and also facilitating the installation of the pressing fixture 60.

In some embodiments of the present invention, as shown in fig. 12, each column of cell assemblies 201 may include: elastic pad 2011 and a plurality of electric core 2012, a plurality of electric core 2012 stack together in proper order, elastic pad 2011 can set up between adjacent electric core 2012, elastic pad 2011 can bond together with electric core 2012 through gluing, elastic pad 2011 is preferably the aerogel felt, it can keep two adjacent electric core 2012 to have the interval to set up like this, elastic pad 2011 has the effect of absorbing electric core 2012 and bulging, and, elastic pad 2011 has good heat-proof quality, be used for the heat that the production of separation single electric core 2012, can avoid on the electric core 2012 heat transfer to on the adjacent electric core 2012.

In some embodiments of the present invention, as shown in fig. 12, the electric core assembly 201 may further include: gasket 2013 and protection 2014, in the stacking direction of a plurality of cells 2012, protection 2014 can be arranged outside the outermost cells 2012, protection 2014 is preferably made of injection molding material, and protection 2014 is used for resisting end friction of the electric core assembly 201 in the assembling process and can protect the end of the electric core assembly 201. A gasket 2013 may be disposed between the protection portion 2014 and the outermost cell 2012, the gasket 2013 is preferably of a rubber structure, the thickness of the gasket 2013 is 2-8mm, and two sides of the gasket 2013 are connected with the cell 2012 and the protection portion 2014 through glue.

In some embodiments of the present invention, as shown in fig. 12, the outer surface of the protection part 2014 may be provided with a positioning hole 2015 and a guide surface 2016, wherein, when installing the battery module 20, the battery module 20 may be placed on the lower case 10 by using a clamp to clamp the battery module 20, and the clamp may be matched with the positioning hole 2015 after passing through the guide surface 2016, so that the positioning of the clamp and the protection part 2014 may be facilitated, and the clamp may be further facilitated to clamp the battery module 20.

In some embodiments of the present invention, the protection portion 2014, the middle connection plate, the outer corner protector, and the pressing fixture 60 may have an insulation protection function, so as to prevent the electricity leakage of the battery cell 2012 module, and thus, the safety of the battery module 20 may be ensured. Also, the cells 2012 of the present application may be stacked and then directly assembled into the lower case 10, and then the battery module 20 may be compressed in the lower case 10 by the compression fixture 60.

The assembly process of the battery module 20 is as follows: first, the protection part 2014, the elastic pad 2011, the gasket 2013 and the battery cell 2012 are stacked in a tool to form the battery pack assembly 201, then the middle connecting plate and the outer corner protector are pasted on the battery pack assembly 201 to form the battery module 20, then the battery module 20 is placed in the lower shell 10, the bus bars are welded, then the upper cover 204 is installed, and finally the pressing fixing piece 60 and the binding band are pressed on the battery module 20, so that the battery module 20 is fixed.

As shown in fig. 1 to 20, a battery pack according to an embodiment of the present invention includes: lower casing 10, upper battery module 4, lower floor's battery module 3, module fixed knot construct 2, first compressing tightly piece 701 and upper housing. Lower floor's battery module 3 and lower floor's battery module 3 all set up in the battery package, and upper battery module 4 sets up in the top of lower floor's battery module 3 moreover to can realize the design of double-deck battery module 20 in the battery package.

The module fixing structure 2 is disposed in the lower case 10, and the module fixing structure 2 is used to clamp the lower battery module 3 in the lower case 10 and fix the upper battery module 4 in the battery pack, that is, the module fixing structure 2 can simultaneously assemble the upper battery module 4 and the lower battery module 3 in the lower case 10. Wherein, at the in-process of assembly battery package, module fixed knot constructs 2 and establishes lower floor's battery module 3 with pressing from both sides in casing 10 down, then assemble upper battery module 4 on module fixed knot constructs 2 again, lower floor's battery module 3 need not assemble into battery module just can assemble in casing 10 down, compared with the prior art, the process of making the battery module can be saved to the setting like this, can avoid lower floor's battery module 3 to set up end plate and curb plate 3012, thereby can reduce the weight of battery package, and then can realize the lightweight design of battery package. Moreover, by omitting the end plates and the side plates 3012, the internal space of the battery pack can be saved, and more battery modules 20 can be arranged in the battery pack, so that the energy density of the battery pack can be improved, and the cruising ability of the battery pack can be improved. Meanwhile, the lower-layer battery module 3 is clamped in the lower shell 10 through the module fixing structure 2, so that the assembly process of the lower-layer battery module and the mounting beam in the prior art can be omitted, the structure of the battery pack can be simplified, the manufacturing cost of the battery pack can be saved, the assembly step of the battery pack can be simplified, and the assembly efficiency of the battery pack can be improved.

First compressing member 701 is used for compressing and fixing lower battery module 3 in lower casing 10, wherein, first compressing member 701 can set up to the bandage, and after lower battery module 3 pressed from both sides and establishes in lower casing 10, use first compressing member 701 to compress tightly lower battery module 3 in lower casing 10, and the bandage can carry out spacing in the height to lower battery module 3 to can prevent that lower battery module 3 from moving in upper and lower direction, and then can reduce the operating noise of battery package. And, the upper housing lid is established on casing 10 down and is connected with casing 10 down, through the cooperation of upper housing and casing 10 down, can seal battery module 20 inside the battery package, can avoid the outside object of battery package to get into the battery package to can guarantee the operational reliability of battery package.

From this, through casing 10, upper battery module 4, lower floor's battery module 3, module fixed knot construct 2, first compress tightly piece 701 and the cooperation of last casing, can simplify the assembly process and the structure of battery package, can promote the assembly efficiency of battery package, also can reduce the manufacturing cost of battery package to, also can save the inner space of battery package, can promote the energy density of battery package.

As shown in fig. 1 to 3, a lower case 10 of a battery pack according to an embodiment of the present invention includes: a body 1 and a module fixing structure 2. The body 1 may define an accommodating space 702, the accommodating space 702 may be used to install the battery module 20, the module fixing structure 2 is disposed on the body 1, the module fixing structure 2 is used to clamp the lower layer battery module 3 of the battery pack in the lower case 10, and the module fixing structure 2 fixes the upper layer battery module 4 of the battery pack in the lower case 10, that is, the module fixing structure 2 is used to clamp the lower layer battery module 3 of the battery pack in the accommodating space 702, and the module fixing structure 2 fixes the upper layer battery module 4 of the battery pack in the battery pack.

Wherein, at the in-process of assembly battery package, establish lower floor's battery module 3 clamp in casing 10 under with earlier, then assemble upper battery module 4 on module fixed knot constructs 2, lower floor's battery module 3 need not assemble into the battery module just can assemble in casing 10 under, compared with the prior art, set up like this and to save the process of making the battery module, can avoid lower floor's battery module 3 to set up end plate and curb plate 3012, thereby can reduce the weight of battery package, and then can realize the lightweight design of battery package. And, through omitting to set up end plate and curb plate 3012, can save the inner space of battery package, can make and set up more battery module 20 in the battery package to can promote the energy density of battery package, and then can promote the duration of battery package. Meanwhile, the lower-layer battery module 3 is clamped in the lower shell 10 through the module fixing structure 2, so that the assembly process of the lower-layer battery module and the mounting beam in the prior art can be omitted, the assembly steps of the battery pack can be simplified, and the assembly efficiency of the battery pack can be improved.

In some embodiments of the present invention, as shown in fig. 3, the module fixing structure 2 may include: the middle pressure part 21 and the side pressure part 22, and the middle pressure part 21 and the side pressure part 22 can be arranged on the body 1, and the middle pressure part 21 and the side pressure part 22 jointly define a module intervening space 23. After the battery pack is assembled, the lower battery module 3 is clamped in the module clamping space 23 by the middle pressing part 21 and the side pressing part 22, so that the lower battery module 3 can be stably assembled on the lower housing 10, and the aim of fixing the lower battery module 3 can be fulfilled.

In some embodiments of the present invention, the middle pressure portion 21 is disposed opposite to the side pressure portion 22, and the middle pressure portion 21 is spaced apart from the side pressure portion 22, it should be noted that, in the width direction of the lower case 10, i.e., in the left and right direction in fig. 3, the middle pressure portion 21 is disposed opposite to and spaced apart from the side pressure portion 22, such arrangement can realize the arrangement of the module clamping space 23, and can ensure that the lower-layer battery module 3 can be clamped in the lower case 10, so that the arrangement form of the middle pressure portion 21 and the side pressure portion 22 can be more reasonable.

In some embodiments of the present invention, as shown in fig. 3, the lower case 10 of the battery pack may further include: the strap fixing plate 5, the strap fixing plate 5 may be provided to the intermediate pressing portion 21, for example: the band fixing plate 5 may be provided at an upper end of the intermediate pressure portion 21. Wherein, the one end of the first compressing member 701 is connected with the bandage fixing plate 5, the other end of the first compressing member 701 is connected with the body 1, the lower battery module 3 is clamped in the module clamping space 23, and then the lower battery module 3 is compressed in the module clamping space 23 by using the bandage, and the one end of the bandage can be connected with the body 1, and the other end of the bandage can be connected with the bandage fixing plate 5, thereby the work purpose of fixing the bandage can be realized, the bandage can highly limit the lower battery module 3, thereby preventing the lower battery module 3 from moving in the up-and-down direction, and further reducing the work noise of the battery pack.

In some embodiments of the present invention, as shown in fig. 3, the side portion 22 has an upper battery module fixing hole 24, it should be explained that, in the process of assembling the battery pack, the upper battery module 4 can be connected with the upper battery module fixing hole 24 through a bolt, by providing the upper battery module fixing hole 24, the upper battery module 4 can be stably assembled on the module fixing structure 2, the work purpose of assembling the upper battery module 4 in the battery pack can be achieved, and the upper battery module fixing hole 24 has a simple structure, such arrangement can facilitate the production and manufacture of the side portion 22, can improve the production efficiency of the side portion 22, and can also reduce the production cost of the side portion 22. However, the present invention is not limited to this, and the upper battery module 4 and the side pressure part 22 may be assembled in other forms as long as the upper battery module 4 and the side pressure part 22 are assembled together.

In some embodiments of the present invention, as shown in fig. 3, a wiring harness channel 25 is defined in the middle pressing portion 21, it should be explained that the wiring harness channel 25 is communicated with the outside of the middle pressing portion 21, the wiring harness channel 25 is used for routing, when the upper layer battery module 4 and the lower layer battery module 3 are assembled on the lower housing 10, a high voltage wiring harness and a low voltage wiring harness in the battery pack can be arranged in the wiring harness channel 25, such arrangement can facilitate routing of the wiring harness in the battery pack, can avoid the wiring harness in the battery pack from contacting other parts, can prevent the wiring harness from being damaged by other parts, and can further prevent the battery pack from short-circuiting.

In some embodiments of the present invention, as shown in fig. 3, the body 1 may have a first side frame 11, a bottom plate 12, and a second side frame 13, and the first side frame 11 and the second side frame 13 are respectively disposed on a first side and a second side of the bottom plate 12, it should be noted that, as shown in fig. 3, the first side frame 11 may be disposed on a left side of the bottom plate 12, and the second side frame 13 may be disposed on a right side of the bottom plate 12.

As shown in fig. 3, side pressing portion 22 may include: first side splenium 26 and second side splenium 27, first side splenium 26 is fixed to be set up in first side roof beam 11, and second side splenium 27 is fixed to be set up in second side roof beam 13, and well splenium 21 can set up in bottom plate 12. Wherein, first side splenium 26 can weld on first side boundary beam 11, second side splenium 27 can weld on second side boundary beam 13, after the battery pack is joined in marriage, when the battery pack is accomplished, because lower floor's battery module 3 clamp is established between side splenium 22 and middling pressure portion 21, the setting can make first side splenium 26 and second side splenium 27 have sufficient intensity and bear the bulging force of lower floor's battery module 3 like this, can prevent that first side splenium 26 and second side splenium 27 from separating with body 1 to can guarantee the installation reliability of lower floor's battery module 3. Furthermore, the intermediate pressure part 21 may be welded to the bottom plate 12, so that the intermediate pressure part 21 can be stably mounted on the bottom plate 12, and the connection between the intermediate pressure part 21 and the bottom plate 12 can be prevented from being broken, so that the intermediate pressure part 21 has sufficient strength to withstand the expansive force of the lower battery modules 3 on both sides.

In some embodiments of the present invention, the middle pressing portion 21 is located at a middle position of the bottom plate 12 in a width direction of the lower case 10, that is, in a left-right direction in fig. 3, it should be noted that, in the width direction of the lower case 10, the middle pressing portion 21 is located between the first side pressing portion 26 and the second side pressing portion 27, and the middle pressing portion 21 is disposed at a distance from the first side pressing portion 26 and the second side pressing portion 27, so that the module clamping space 23 is formed between the middle pressing portion 21 and the first side pressing portion 26, and between the middle pressing portion 21 and the second side pressing portion 27, and it is ensured that the lower battery module 3 can be clamped on the lower case 10.

In some embodiments of the present invention, as shown in fig. 3, the reinforcing structures 28 may be disposed inside the middle pressure part 21 and the side pressure part 22, it should be explained that the interiors of the middle pressure part 21 and the side pressure part 22 may be disposed as hollow structures, and the reinforcing structures 28 are disposed inside the middle pressure part 21 and the side pressure part 22, wherein the reinforcing structures 28 have a function of reinforcing structures, so that the arrangement can improve the structural strength of the middle pressure part 21 and the side pressure part 22, and can improve the ability of the middle pressure part 21 and the side pressure part 22 to bear the expansion force of the battery module 20, so that the lower case 10 can be prevented from being deformed.

According to the vehicle provided by the embodiment of the invention, the lower shell 10 comprises the lower shell 10 provided and installed on the vehicle, the lower shell 10 can simplify the assembly process of the battery pack, the assembly efficiency of the battery pack can be improved, the internal space of the battery pack can be saved, and the energy density of the battery pack can be improved.

In some embodiments of the present invention, as shown in fig. 4, 5 and 15, the battery pack may further include: installing support 30, upper battery module 4 set up in installing support 30, and installing support 30 is connected with module fixed knot constructs 2, and wherein, through setting up installing support 30, can install upper battery module 4 in the battery package firmly, can prevent upper battery module 4 shake.

The battery module 20 according to the embodiment of the present invention is disposed in a battery pack, and the battery module 20 may be an upper battery module 4 in the battery pack or a lower battery module 3 in the battery pack.

As shown in fig. 1 to 5, a mounting bracket 30 for mounting a battery module 20 according to an embodiment of the present invention includes: a receiving groove 301 and an end fixing plate 302. In assembling the battery pack, the receiving groove 301 is coupled to the side pressure part 22 of the battery pack, the end fixing plate 302 is disposed in the receiving groove 301, the end fixing plate 302 and the receiving groove 301 define a receiving cavity 303, and the battery module 20 is disposed in the receiving cavity 303.

When the upper battery module 4 of the battery pack is assembled, the mounting bracket 30 is connected to the side pressure part 22 of the battery pack, the battery module 20 is mounted in the accommodating cavity 303, and the battery module 20 is connected to the accommodating cavity 301 and/or the end fixing plate 302, so that the assembly of the upper battery module 4 is realized. Set up like this and can install battery module 20 in the battery package fast and reliably, can promote battery module 20's installation effectiveness to, installing support 30 simple structure of this application can make things convenient for installing support 30's production and manufacturing, thereby can reduce installing support 30's manufacturing cost, and then can reduce the manufacturing cost of battery package.

Meanwhile, the battery module 20 mounted in the receiving cavity 303 does not need to form a battery module, and the battery module 20 is not provided with the end plate and the side plate 3012, so that the number of parts constituting the battery module 20 can be reduced, the manufacturing cost and the weight of the battery module 20 can be reduced, and the lightweight design of the battery module 20 can be realized. In addition, the structure of the battery module 20 can be simplified, and the production and manufacture of the battery module 20 can be facilitated, so that the assembly efficiency of the battery module 20 can be improved, and the production efficiency of the battery module 20 can be improved.

In some embodiments of the present invention, the cross section of the receiving groove 301 may be configured as a "U" shape, two ends of the receiving groove 301 are disposed in an open manner, and the end fixing plate 302 may be disposed at the open end of the receiving groove 301, such that the receiving groove 301 and the end fixing plate 302 jointly define the receiving cavity 303, which may make the arrangement of the receiving groove 301 and the end fixing plate 302 more reasonable.

In some embodiments of the present invention, as shown in fig. 4, the accommodating groove 301 may include: a support plate 3011 and two side plates 3012, the two side plates 3012 are disposed on two sides of the support plate 3011, the two side plates 3012 may have bolt connection holes 3013, and the bolt connection holes 3013 are used to connect to the battery module 20, for example: after the battery module 20 is installed in the accommodating cavity 303, the battery module 20 and the two side plates 3012 can be stably assembled together by matching the bolt with the bolt connecting hole 3013, so that the battery module 20 in the accommodating groove 301 can be prevented from loosening, and the vibration of the battery module 20 in the accommodating groove 301 can be reduced.

In some embodiments of the present invention, as shown in fig. 4, at least one of the two side plates 3012 may be provided with a heating film wire outlet gap 3014, it should be noted that only one side plate 3012 may be provided with the heating film wire outlet gap 3014, or both side plates 3012 may be provided with the heating film wire outlet gaps 3014 at the same time, and after the battery module 20 is installed in the accommodating cavity 303, the wire harness of the battery module 20 may extend out of the mounting bracket 30 through the heating film wire outlet gap 3014.

In some embodiments of the present invention, as shown in fig. 4, the heater film outlet notch 3014 is disposed at the upper end of the side plate 3012, which is configured to facilitate the extension of the wire harness of the battery module 20 from the heater film outlet notch 3014, and to reduce the length of the wire harness in the mounting bracket 30, so that the space in the mounting bracket 30 may be saved, and the arrangement of the heater film may also be facilitated. However, the present invention is not limited thereto, and the heating film outlet notch 3014 may be provided at another position of the side plate 3012.

In some embodiments of the present invention, as shown in fig. 4, the supporting plate 3011 may be provided with side pressure connection holes 3015, and the side pressure connection holes 3015 are used to connect with the side pressure part 22, wherein when the mounting bracket 30 is mounted, the supporting plate 3011 can be mounted on the side pressure part 22 by matching the side pressure connection holes 3015 with bolts, and the work purpose of fixing and mounting the mounting bracket 30 in the battery pack can be achieved.

In some embodiments of the present invention, as shown in fig. 4, the end fixing plate 302 may be disposed on the upper surface of the support plate 3011, and the end fixing plate 302 may have a strap attaching hole 3021, wherein, after the battery module 20 is mounted in the receiving cavity 303, the battery module 20 is pressed in the receiving cavity 303 using a strap, and thus the battery module 20 may be prevented from moving out of the receiving cavity 303. Also, the mounting bracket 30 may be provided with two end fixing plates 302, the two end fixing plates 302 being located at both open ends of the receiving groove 301, respectively, one end of the band being coupled to the band coupling hole 3021 of one end fixing plate 302, and the other end of the band being coupled to the band coupling hole 3021 of the other end fixing plate 302, so that the band can be reliably assembled to the mounting bracket 30, ensuring that the band can be pressed against the battery module 20.

In some embodiments of the present invention, as shown in fig. 4, the outer side surface of the end fixing plate 302 may be provided with a first avoiding groove 3022, the first avoiding groove 3022 may extend along the height direction of the end fixing plate 302, and the first avoiding groove 3022 is disposed corresponding to the side press portion connecting hole 3015. it should be explained that, in the extending direction of the first avoiding groove 3022, the side press portion connecting hole 3015 is disposed corresponding to the first avoiding groove 3022, such arrangement can avoid the side press portion connecting hole 3015 from the first avoiding groove 3022, and can ensure that the bolt can pass through the side press portion connecting hole 3015, thereby ensuring that the assembling of the mounting bracket 30 and the side press portion 22 can be completed smoothly.

In some embodiments of the present invention, the inner side surface of the end fixing plate 302 may be provided with a second avoiding groove 3023, the second avoiding groove 3023 extends along the height direction of the end fixing plate 302, and the first avoiding groove 3022 and the second avoiding groove 3023 are alternately arranged in the length direction of the end fixing plate 302, i.e., the front-back direction in fig. 4, so that the first avoiding groove 3022 and the second avoiding groove 3023 are prevented from facing each other, the structural strength of the end fixing plate 302 may be ensured, and thus the end fixing plate 302 may be prevented from being deformed. In addition, in the process of placing the battery module 20 into the housing cavity 303, the battery module 20 can be placed into the housing cavity 303 by clamping the battery module 20 with a jig, and after the battery module 20 is placed into the housing cavity 303, the second escape groove 3023 can escape from the jig, so that the jig can be smoothly removed from the housing cavity 303.

In some embodiments of the present invention, the receiving groove 301 and the end fixing plate 302 may be integrally formed, wherein the receiving groove 301 and the end fixing plate 302 may be integrally formed by extruding a profile, such that the structural strength of the receiving groove 301 and the end fixing plate 302 may be improved, and the receiving groove 301 and the end fixing plate 302 may be prevented from being broken, thereby ensuring the reliable installation of the battery module 20.

In some embodiments of the present invention, each of the lower battery modules 3 and the upper battery modules 4 may be provided in plurality, that is, a plurality of lower battery modules 3 and a plurality of upper battery modules 4 are provided in the battery pack, so that the energy density of the battery pack can be increased, and the cruising ability of the battery pack can be ensured.

In some embodiments of the present invention, as shown in fig. 20, the lower battery module 3 may be provided with an outer lower corner bead 203, the outer lower corner bead 203 being connected to the lower case 10, it should be noted that the outer lower corner bead 203 is disposed at the outer side of the outermost core pack 201 of the lower battery module 3, and the outer lower corner bead 203 is located at the lower part of the outermost core pack 201, the outer lower corner bead 203 is used for holding the outermost core pack 201 and being connected to the lower case 10 of the battery pack, and the outer lower corner bead 203 may be adhered to the core pack 201, so that the lower battery module 3 may be fixed to the lower case 10.

As shown in fig. 13 and 14, the upper battery module 4 may include: a plurality of rows of cell assemblies 201, an upper battery module middle lower connecting plate 41, an upper battery module middle upper connecting plate 42, an upper battery module outer side upper corner guard 43, an upper battery module outer side lower corner guard 44, and an upper battery module upper cover 45. The upper-layer battery module intermediate lower connection plate 41 may have the same structure as the intermediate lower connection plate 206, and the upper-layer battery module intermediate upper connection plate 42 may have the same structure as the intermediate upper connection plate 205. Multiple columns of electric core assemblies 201 are arranged side-by-side and/or side-by-side. The lower connecting plate 41 in the middle of the upper battery module is arranged between two adjacent columns of the cell assemblies 201, and the lower connecting plate 41 in the middle of the upper battery module is used for supporting and spacing two adjacent columns of the cell assemblies 201. Upper connecting plate 42 sets up between two adjacent electric core subassemblies 201 in the middle of the upper battery module, and upper connecting plate 42 is used for compressing tightly and separates two adjacent electric core subassemblies 201 in the middle of the upper battery module. Upper battery module outside upper portion angle bead 43 sets up in the outside of outside battery module 201, and upper battery module outside upper portion angle bead 43 is used for being connected with installing support 30, and it should be noted that upper battery module outside upper portion angle bead 43 can be provided with the fastener connecting hole, and the fastener can pass fastener connecting hole and installing support 30's bolt connecting hole 3013 simultaneously to can fix upper battery module 4 in installing support 30. The upper battery module outer lower corner protectors 44 are disposed at the outer sides of the outermost battery cell assemblies 201 and located at the lower portions of the outermost battery cell assemblies 201, and the upper battery module outer lower corner protectors 44 are used for supporting the outermost battery cell assemblies 201. The upper battery module cover 45 is disposed on the upper end of the multiple rows of the battery cell assemblies 201 and connected to at least one of the upper connecting plate 42 in the middle of the upper battery module and the upper corner protector 43 on the outer side of the upper battery module.

It should be noted that, the lower connecting plate 41 in the middle of the upper battery module and the upper connecting plate 42 in the middle of the upper battery module can be adhered to two adjacent columns of the electric core assembly 201, so that the lower connecting plate 41 in the middle of the upper battery module and the upper connecting plate 42 in the middle of the upper battery module can be reliably connected to the electric core assembly 201, and the electric core assembly 201 can also be restrained.

And, the upper battery module outer upper corner protectors 43 are positioned on the upper portions of the outermost core assemblies 201, and the upper battery module outer upper corner protectors 43 serve to press the outermost core assemblies 201. It should be noted that the upper cell module outer upper corner 43 may be disposed at a shoulder position of the cell assembly 201. Upper battery module outside lower part angle bead 44 sets up in the outside of outside electric core subassembly 201 to upper battery module outside lower part angle bead 44 is located the lower part of outside electric core subassembly 201, and upper battery module outside lower part angle bead 44 is used for holding electric core subassembly 201 in the outside, and it should be explained that upper battery module outside lower part angle bead 44 compresses tightly electric core subassembly 201 with upper battery module outside upper part angle bead 43 jointly, and upper battery module outside lower part angle bead 44 and upper battery module outside upper part angle bead 43 all can be in the same place with electric core subassembly 201 bonds. Upper battery module outside lower part angle bead 44 and upper battery module outside upper part angle bead 43 can play the guard action to electric core subassembly 201 to can avoid electric core subassembly 201 to damage.

In some embodiments of the present invention, as shown in fig. 13, the upper battery module 4 may further include: middle end plate 46, middle end plate 46 can set up between two adjacent electric core subassemblies 201 that set up side by side, through setting up middle end plate 46, can conveniently arrange the low pressure plug connector in battery module 20, also can conveniently press from both sides electric core subassembly 201.

In some embodiments of the present invention, as shown in fig. 14, at least one of the upper battery module middle upper connecting plate 42 and the upper battery module outer upper corner 43 is provided with a third mounting portion 47, and it should be noted that the third mounting portion 47 may be provided only on the upper battery module middle upper connecting plate 42, only on the upper battery module outer upper corner 43, or both on the upper battery module middle upper connecting plate 42 and the upper battery module outer upper corner 43.

As shown in fig. 5, the upper battery module cover 45 may be provided with fourth mounting parts 48 adapted to be engaged with the third mounting parts 47. Wherein, after the assembly of upper battery module 4 is accomplished, third installation department 47 is in the same place with the joint of fourth installation department 48, can assemble upper battery module upper cover 45 on upper battery module 4 reliably, can prevent that upper battery module upper cover 45 from breaking away from upper battery module 4, also can avoid upper battery module upper cover 45 not hard up, and, upper battery module upper cover 45 can play the guard action to the spare part between electric core subassembly 201 and upper battery module upper cover 45, can avoid the spare part between electric core subassembly 201 and the upper battery module upper cover 45 to receive external environment and damage, thereby can guarantee upper battery module 4's operational reliability. Meanwhile, the upper battery module upper cover 45 can be rapidly assembled on the upper battery module 4 by clamping the third mounting part 47 and the fourth mounting part 48, so that the assembling time of the upper battery module upper cover 45 can be saved, and the assembling efficiency of the upper battery module 4 can be improved.

In some embodiments of the present invention, as shown in fig. 15, the battery pack may further include: the second pressing member 49, the second pressing member 49 may be configured as a binding band, the upper surface of the third mounting portion 47 has an upper battery module binding band mounting groove 491, the second pressing member 49 is located in the upper battery module binding band mounting groove 491, both ends of the second pressing member 49 are respectively connected with the mounting bracket 30, wherein, after the upper battery module 4 is placed in the mounting bracket 30 and is assembled with the mounting bracket 30, the second pressing member 49 is assembled in the upper battery module binding band mounting groove 491 and is connected with the mounting bracket 30, the second pressing member 49 may press the upper battery module 4 in the mounting bracket 30, thereby preventing the upper battery module 4 from moving out of the mounting bracket 30.

In some embodiments of the present invention, as shown in fig. 13, the upper battery module 4 may further include: the middle bushing 492, after the upper battery module 4 is assembled, one end of the middle bushing 492 is connected to the supporting plate 3011 of the mounting bracket 30, and the other end of the middle bushing 492 is connected to the second pressing member 49, so that the second pressing member 49 can be firmly assembled to the mounting bracket 30, and the second pressing member 49 can be prevented from loosening.

Wherein, the assembly process of the upper battery module 4 and the lower battery module 3 in the battery pack is as follows: first, the cell assembly 201 of the lower battery module 3 is clamped into the lower case 10 by a jig, and then the bolts for connecting and fixing the outer lower corner bead 203 and the lower case 10 are tightened, at this time, the side pressing portion 22 and the middle pressing portion 21 can compress the cell assembly 201 and fix the cell assembly 201, then the bus bars between the cells 2012 in the cell assembly 201 are welded, and then the lower battery module 3 is fixed by a binding band.

Then, the upper battery module 4 is placed into the mounting bracket 30 through a clamp, and a fastening piece which is used for connecting the upper corner guard 43 on the outer side of the upper battery module and the mounting bracket 30 is tightened, wherein the fastening piece can be a bolt, the mounting bracket 30 clamps the lower battery module 3 at the moment, then busbars among the battery cells 2012 are welded, then the upper battery module 4 is fixed through a binding belt, and then the mounting bracket 30 is assembled with the side pressing parts 22 through the bolt, so that the mounting work of the upper battery module 4 is completed.

According to the vehicle provided by the embodiment of the invention, the battery pack comprises the battery pack of the embodiment, the assembly process and the structure of the battery pack can be simplified, the assembly efficiency of the battery pack can be improved, the production cost of the battery pack can be reduced, the internal space of the battery pack can be saved, and the energy density of the battery pack can be improved.

As shown in fig. 21, the method of mounting the battery module 20 in the battery pack according to the embodiment of the present invention includes the steps of: in the process of mounting the battery module 20 in the battery pack, the plurality of cells 2012 are first stacked into the cell assembly 201, and then the cell assembly 201 is subjected to a layering process, so that the lower battery module 3 and the upper battery module 4 can be obtained. And then the lower-layer battery module 3 is gripped and placed in the module clamping space 23 of the lower case 10 of the battery pack, and the lower-layer battery module 3 is clamped in the clamping space, so that the lower-layer battery module is fixed in the clamping space. Then, the upper battery module 4 is clamped into the mounting bracket 30 of the battery pack, and the upper battery module 4 and the mounting bracket 30 are connected together, for example: the upper battery module 4 and the mounting bracket 30 may be coupled together by bolts. And then grips the upper-layer battery module 4 and the mounting bracket 30, which are mounted together, and places the mounting bracket 30 above the lower-layer battery module 3, and couples the mounting bracket 30 with the lower case 10, for example: the mounting bracket 30 may be coupled to the lower case 10 by bolts.

Wherein, through using the installation method of this application to install battery module 20, can install in the battery package after stacking a plurality of electric cores 2012, compare with prior art, can save the design of battery module, can save the process of installation end plate and curb plate 3012 to can simplify the installation process of battery package, and then can promote the assembly efficiency of battery package. Further, by omitting the installation of the end plates and the side plates 3012, the weight of the battery module 20 can be reduced, and a lightweight design of the battery pack can be achieved.

In some embodiments of the present invention, as shown in fig. 12, the step of "stacking a plurality of cells 2012 into a cell assembly 201" may include: the elastic pad 2011 is bonded between two adjacent battery cells 2012, and in the stacking direction of the battery cells 2012, the protection portion 2014 is bonded to the outer side of the battery cell 2012 located on the outermost side. It should be noted that the elastic pad 2011 is disposed between two adjacent battery cells 2012, the elastic pad 2011 may be bonded to the battery cells 2012 through glue, and the elastic pad 2011 is preferably an aerogel felt, so that the adjacent two battery cells 2012 can be kept spaced, the elastic pad 2011 has an effect of absorbing swelling of the battery cells 2012, and the elastic pad 2011 has a good heat-insulating property, and is configured to block heat generated by a single battery cell 2012, and can prevent heat on the battery cell 2012 from being transferred to the adjacent battery cell 2012. And, the protection part 2014 is preferably injection molding material, and the protection part 2014 is used for resisting the friction of the end of the electric core assembly 201 during the assembling process, so as to protect the end of the electric core assembly 201.

In some embodiments of the present invention, as shown in fig. 12, the step of "stacking a plurality of cells 2012 into a cell assembly 201" may further include: bonding a gasket 2013 between the protection portion 2014 and the cell 2012, wherein the gasket 2013 may be disposed between the protection portion 2014 and the outermost cell 2012, the gasket 2013 is preferably of a rubber structure, the thickness of the gasket 2013 is 2-8mm, and two sides of the gasket 2013 are connected with the cell 2012 and the protection portion 2014 through glue.

In some embodiments of the present invention, as shown in fig. 16 to 18, the step of layering the cell assembly 201 to obtain the lower battery module 3 and the upper battery module 4 may include: the plurality of cell assemblies 201 are placed in the plurality of second jigs 801 by using the first jig 80, it should be noted that the plurality of cell assemblies 201 correspond to the plurality of second jigs 801 one by one, then the plurality of cell assemblies 201 are arranged side by side, the middle lower connecting plate 206 and the middle upper connecting plate 205 are bonded to one of the cell assemblies 201 of the two adjacent cell assemblies 201, then the two adjacent second jigs 801 are controlled to move toward each other, the two adjacent cell assemblies 201 can be clamped and bonded to the middle lower connecting plate 206 and the middle upper connecting plate 205, and thus the two adjacent cell assemblies 201 can be assembled together. It should be explained that the middle lower connecting plate 206 and the middle upper connecting plate 205 can be adhesively fixed with two adjacent electric core assemblies 201.

In some embodiments of the present invention, as shown in fig. 7, "layering the cell assembly 201 to obtain the lower battery module 3 and the upper battery module 4" may further include: the outer upper bead 202 and the outer lower bead 203 are respectively adhered to the outer side of the outermost core pack 201, and the outer upper bead 202 and the outer lower bead 203 are respectively adhered to the upper and lower portions of the core pack 201. Wherein, outside upper portion angle bead 202 can be used for compressing tightly electric core subassembly 201 in the outside, and outside lower part angle bead 203 is used for holding electric core subassembly 201 in the outside and is connected with the lower casing 10 of battery package, compresses tightly electric core subassembly 201 through outside upper portion angle bead 202 and outside lower part angle bead 203 jointly, can make battery module 20 need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20 to can reduce battery module 20's manufacturing cost and weight. Meanwhile, the internal space of the battery pack can be saved, so that the energy density of the battery pack can be improved, in addition, the structure of the battery module 20 can be simplified, the production and the manufacture of the battery module 20 can be facilitated, the assembly efficiency of the battery module 20 can be improved, and the production efficiency of the battery module 20 can be improved.

In some embodiments of the present invention, as shown in fig. 16 and 17, "layering the cell assembly 201 to obtain the lower battery module 3 and the upper battery module 4" may further include: a cell assembly 201 is placed in the second jig 801 using the first jig 80, in which the battery module 20 includes a cell assembly 201, and then the outer upper and

lower beads

202 and 203 are respectively attached to the outer sides of the cell assembly 201, and the outer upper and

lower beads

202 and 203 are respectively attached to the upper and lower portions of the cell assembly 201. Wherein, outside upper portion angle bead 202 can be used for compressing tightly the electric core subassembly 201 in the outside, and outside lower part angle bead 203 is used for holding the electric core subassembly 201 in the outside and is connected with the lower casing 10 of battery package, compresses tightly electric core subassembly 201 jointly through outside upper portion angle bead 202 and outside lower part angle bead 203, can make battery module 20 need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20 to can reduce battery module 20's manufacturing cost and weight. Meanwhile, the internal space of the battery pack can be saved, so that the energy density of the battery pack can be improved, in addition, the structure of the battery module 20 can be simplified, the production and the manufacture of the battery module 20 can be facilitated, the assembly efficiency of the battery module 20 can be improved, and the production efficiency of the battery module 20 can be improved.

In some embodiments of the present invention, as shown in fig. 18, "layering the cell assembly 201 to obtain the lower battery module 3 and the upper battery module 4" may further include: after the first fixture 80 places the plurality of cell assemblies 201 in the plurality of second fixtures 801, it should be noted that the plurality of cell assemblies 201 correspond to the plurality of second fixtures 801 one by one, then the plurality of cell assemblies 201 are arranged side by side and/or side by side, the upper-layer battery module middle lower connecting plate 41 and the upper-layer battery module middle upper connecting plate 42 are bonded to one of the cell assemblies 201 of two adjacent cell assemblies 201, then the two adjacent second fixtures 801 are controlled to move toward each other, so that the two adjacent cell assemblies 201 can be clamped and bonded to the upper-layer battery module middle lower connecting plate 41 and the upper-layer battery module middle upper connecting plate 42, and thus the two adjacent cell assemblies 201 can be assembled together. It should be noted that the upper battery module middle lower connecting plate 41 and the upper battery module middle upper connecting plate 42 may be adhesively fixed to two adjacent cell assemblies 201.

In some embodiments of the present invention, as shown in fig. 14, "layering the cell assembly 201 to obtain the lower battery module 3 and the upper battery module 4" may further include: the upper battery module outside lower bead 44 and the upper battery module outside upper bead 43 are respectively attached to the outside of the core pack 201 positioned at the outermost side, and the upper battery module outside lower bead 44 and the upper battery module outside upper bead 43 are respectively attached to the upper and lower portions of the core pack 201. Wherein, upper battery module outside upper portion angle bead 43 can be used for compressing tightly electric core subassembly 201 in the outside, upper battery module outside lower part angle bead 44 is used for holding electric core subassembly 201 in the outside, compress tightly electric core subassembly 201 jointly through upper battery module outside upper portion angle bead 43 and upper battery module outside lower part angle bead 44, can make battery module 20 need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing battery module 20, thereby can reduce battery module 20's manufacturing cost and weight. Meanwhile, the internal space of the battery pack can be saved, so that the energy density of the battery pack can be improved, in addition, the structure of the battery module 20 can be simplified, the production and the manufacture of the battery module 20 can be facilitated, the assembly efficiency of the battery module 20 can be improved, and the production efficiency of the battery module 20 can be improved.

In some embodiments of the present invention, as shown in fig. 17, "layering the cell assembly 201 to obtain the lower battery module 3 and the upper battery module 4" may further include: an electric core assembly 201 is put into the second jig 801 using the first jig 80, in which the upper battery module 4 includes an electric core assembly 201, and then the upper battery module outside lower bead 44 and the upper battery module outside upper bead 43 are respectively attached to the outside of the electric core assembly 201, and the upper battery module outside lower bead 44 and the upper battery module outside upper bead 43 are respectively attached to the upper and lower portions of the electric core assembly 201. Wherein, upper battery module outside upper portion angle bead 43 can be used for compressing tightly electric core subassembly 201 in the outside, upper battery module outside lower part angle bead 44 is used for holding electric core subassembly 201 in the outside, compress tightly electric core subassembly 201 jointly through upper battery module outside upper portion angle bead 43 and upper battery module outside lower part angle bead 44, can make upper battery module 4 need not set up end plate and curb plate 3012, can reduce the spare part quantity of constituteing upper battery module 4, thereby can reduce upper battery module 4's manufacturing cost and weight. Meanwhile, the internal space of the battery pack can be saved, so that the energy density of the battery pack can be improved, in addition, the structure of the upper battery module 4 can be simplified, the production and the manufacture of the upper battery module 4 can be facilitated, the assembly efficiency of the upper battery module 4 can be improved, and the production efficiency of the upper battery module 4 can be improved.

In some embodiments of the present invention, the "module clamping space 23 clamping the lower battery module 3 and placed in the lower case 10 of the battery pack" may further include: electrical components are welded to the core assembly 201, then the upper cover 204 is mounted on the upper end of the core assembly 201, and the first pressing members 701 are disposed above the lower battery module 3, and the first pressing members 701 may fix the lower battery module 3 in the lower case 10. It should be noted that, after lower battery module 3 is placed in lower housing 10 by first fixture 80, electrical components are welded on core assembly 201, then upper cover 204 is assembled to the upper end of core assembly 201, and after upper cover 204 is installed, lower battery module 3 is pressed in lower housing 10 by first pressing component 701, so that the installation and fixation of lower battery module 3 can be completed.

In some embodiments of the present invention, "clamping the upper battery module 4 into the mounting bracket 30 of the battery pack and connecting with the mounting bracket 30" may further include: the upper battery module 4 electrical components are welded to the cell assembly 201, then the upper battery module cover 45 is mounted on the upper end of the cell assembly 201, and the second pressing member 49 is disposed above the upper battery module 4 to fix the upper battery module 4 in the mounting bracket 30. It should be explained that, after upper battery module 4 is placed in mounting bracket 30, electrical components of upper battery module 4 are welded on core assembly 201, then upper battery module upper cover 45 is assembled to the upper end of core assembly 201, and after upper battery module upper cover 45 is installed, upper battery module 4 is pressed in mounting bracket 30 by second pressing member 49, so that the assembly of upper battery module 4 and mounting bracket 30 can be completed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims

1. A battery pack, comprising:

a lower housing;

the battery pack comprises an upper battery module and a lower battery module, wherein the lower battery module and the upper battery module are arranged in the battery pack, and the upper battery module is arranged above the lower battery module;

the module fixing structure is arranged in the lower shell and used for clamping the lower-layer battery module in the lower shell and fixing the upper-layer battery module in the battery pack;

a first compressing member for compressing and fixing the lower-layer battery module in the lower case;

the upper shell is covered on the lower shell and connected with the lower shell;

the upper-layer battery module is arranged on the mounting bracket, and the mounting bracket is connected with the module fixing structure;

the lower case includes: the battery pack comprises a body, wherein the body defines an accommodating space, the module fixing structure is arranged on the body and is used for clamping a lower-layer battery module of the battery pack in the accommodating space and fixing an upper-layer battery module of the battery pack in the battery pack;

the module fixed knot constructs includes: the middle pressing part and the side pressing part are arranged on the body and jointly define a module clamping space;

the middle pressing part and the side pressing part are oppositely arranged and spaced;

the binding band fixing plate is arranged on the middle pressing part, one end of the first pressing piece is connected with the binding band fixing plate, and the other end of the first pressing piece is connected with the body;

the side pressing part is provided with an upper-layer battery module fixing hole;

the number of the lower-layer battery modules and the number of the upper-layer battery modules are multiple;

the upper battery module includes:

the electric core assemblies are arranged side by side and/or in parallel;

the middle lower connecting plate of the upper battery module is arranged between two adjacent rows of the electric core assemblies and is used for supporting and spacing the two adjacent rows of the electric core assemblies;

the middle upper connecting plate of the upper battery module is arranged between two adjacent rows of the electric core assemblies and is used for compressing the two adjacent rows of the electric core assemblies at intervals;

the upper part corner protector at the outer side of the upper battery module is arranged at the outer side of the outermost battery core assembly and is used for being connected with the mounting bracket;

the lower part corner protector of the outer side of the upper battery module is arranged at the outer side of the outermost side of the electric core assembly and is positioned at the lower part of the outermost side of the electric core assembly, and the lower part corner protector of the outer side of the upper battery module is used for supporting the outermost side of the electric core assembly;

the upper battery module cover is arranged at the upper ends of the multiple rows of the battery cell assemblies and is connected with at least one of the upper connecting plate in the middle of the upper battery module and the upper corner protector at the outer side of the upper battery module;

the upper battery module further includes: the middle end plate is arranged between two adjacent rows of the electric core assemblies which are arranged in parallel;

the mounting bracket includes: holding tank and tip fixed plate, the tip fixed plate with the holding tank is injectd and is held the chamber, upper battery module sets up in holding the intracavity, be provided with on the tip fixed plate and dodge the groove with the second that anchor clamps dodged when the assembly.

2. The battery pack of claim 1, wherein the body has a first side rail, a bottom plate, and a second side rail, the first and second side rails being disposed on first and second sides of the bottom plate, respectively;

the side pressure portion includes: the first side pressing part is fixedly arranged on the first side edge beam, the second side pressing part is fixedly arranged on the second side edge beam, and the middle pressing part is arranged on the bottom plate;

the medium-pressure part is positioned in the middle of the bottom plate.

3. The battery pack according to claim 1,

the lower battery module is provided with an outer lower corner protector, and the outer lower corner protector is connected with the lower shell.

4. The battery pack of claim 1, wherein the upper battery module further comprises: the middle upper portion connecting plate of upper battery module with at least one in the upper portion angle bead in the upper battery module outside is provided with the third installation department, upper battery module upper cover be provided with be suitable for with the fourth installation department of third installation department joint.

5. The battery pack according to claim 4, further comprising: the upper surface of the third mounting part is provided with an upper-layer battery module binding band mounting groove, the second pressing part is positioned in the upper-layer battery module binding band mounting groove, and two ends of the second pressing part are respectively connected with the mounting bracket;

the upper battery module further includes: and one end of the middle bushing is connected with the support plate of the mounting bracket, and the other end of the middle bushing is connected with the second pressing piece.

6. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 5.