CN220065890U - Battery pack and electric vehicle - Google Patents

Abstract

The embodiment of the utility model provides a battery pack and an electric vehicle, and relates to the technical field of power batteries. The battery package includes casing, lower plate, group battery, upper cover plate and fixed sheet metal component, and lower plate and group battery all set up in the casing, and the lower plate is connected with the casing, and the group battery is fixed in the top of lower plate, and the upper cover plate sets up in the top of group battery, and fixed sheet metal component sets up in one side of upper cover plate, and the both ends of fixed sheet metal component are connected with upper cover plate and casing respectively to be used for fixed group battery. The battery pack can reduce the number of parts, reduce the cost and improve the production efficiency.

Description

Battery pack and electric vehicle

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery pack and an electric vehicle.

Background

The key of the endurance mileage of the new energy electric vehicle lies in the power battery, the current battery cell specification of the power battery is square, soft package and cylindrical, the inside of the cylindrical battery cell is further divided into 4680, 18650 and 21700, the larger the specification size is, the higher the energy density of the monomer is, the higher the utilization ratio of the limited space size in the battery package is, and the common grouping mode of the current cylindrical battery cell is as follows: the length direction of the battery core is transversely placed, two ends of the battery core are respectively provided with a plastic clamping plate, a plurality of battery cores are clamped to form a module, then a plurality of modules are connected into a large module through structural members, and then a plurality of modules in the large module are connected in series through flexible connection to form a battery pack, so that the required platform voltage and rated energy requirements are met.

However, the battery pack of this assembly method is complicated in structure, and has a large number of parts, resulting in high costs and low production efficiency.

Disclosure of Invention

The utility model aims to provide a battery pack and an electric vehicle, which can reduce the number of parts, reduce the cost and improve the production efficiency.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a battery pack comprising:

a housing;

the lower bottom plate is arranged in the shell and is connected with the shell;

the battery pack is arranged in the shell and is fixed above the lower bottom plate;

the upper cover plate is arranged above the battery pack; and

the fixed sheet metal component, fixed sheet metal component set up in one side of upper cover plate, fixed sheet metal component's both ends respectively with the upper cover plate and the casing is connected, in order to be used for fixing the group battery.

In an optional embodiment, a plurality of first mounting grooves are formed in the top of the lower bottom plate, the battery pack comprises a plurality of electric cells, and bottoms of the electric cells are in one-to-one correspondence with the plurality of first mounting grooves.

In an optional embodiment, a plurality of second mounting grooves are formed in the bottom of the upper cover plate, the battery pack comprises a plurality of electric cells, and the tops of the electric cells are in one-to-one correspondence with the second mounting grooves.

In an alternative embodiment, the battery pack further includes a soaking plate disposed between the lower plate and the battery pack.

In an alternative embodiment, a third mounting groove is further formed in the top of the lower bottom plate, and the soaking plate is disposed in the third mounting groove.

In an alternative embodiment, the battery pack further includes a bus bar, the bus bar is disposed above the upper cover plate, the upper cover plate is provided with a through hole, and the bus bar is connected with the battery pack through the through hole.

In an alternative embodiment, a fourth mounting groove is further formed in the top of the upper cover plate, and the busbar is disposed in the fourth mounting groove.

In an alternative embodiment, the bottom of the lower bottom plate is provided with a limiting hole, the bottom wall of the shell is provided with a first limiting column, and the first limiting column is arranged in the limiting hole.

In an alternative embodiment, the battery pack further includes an insulating plate disposed above the upper cap plate and connected to the upper cap plate.

In an alternative embodiment, the two opposite sides of the upper cover plate are respectively provided with the fixing sheet metal parts, and two ends of each fixing sheet metal part are respectively connected with the upper cover plate and the shell so as to fix the battery pack.

In a second aspect, the present utility model provides an electric vehicle comprising a battery pack according to any one of the preceding embodiments.

The beneficial effects of the embodiment of the utility model include:

the battery pack comprises a shell, a lower bottom plate, a battery pack, an upper cover plate and a fixed sheet metal part, wherein the lower bottom plate and the battery pack are arranged in the shell, the lower bottom plate is connected with the shell, the battery pack is fixed above the lower bottom plate, the upper cover plate is arranged above the battery pack, the fixed sheet metal part is arranged on one side of the upper cover plate, and two ends of the fixed sheet metal part are respectively connected with the upper cover plate and the shell so as to be used for fixing the battery pack; can fasten the group battery through upper cover plate and lower plate, can fix the group battery inside the casing through fixed sheet metal component. The battery pack has a simple structure, can reduce the number of parts, reduce the cost and improve the production efficiency.

The electric vehicle comprises the battery pack, and has all the beneficial effects of the battery pack.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present utility model;

fig. 2 is an exploded view of a battery pack according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a housing according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a first view angle of a lower plate according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a second view angle of the lower plate according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a first view angle of an upper cover plate according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a second view angle of the upper cover plate according to an embodiment of the present utility model.

Icon: 1000-an electric vehicle; 100-battery pack; 10-a housing; 11-a front wall; 12-a rear wall; 13-left wall; 14-right wall; 15-a bottom wall; 16-a mounting cavity; 17-a first limit column; 20-a lower base plate; 21-a first mounting groove; 22-a third mounting groove; 23-limiting holes; 30-battery pack; 31-an electric core; 40-upper cover plate; 41-a second mounting groove; 42-through holes; 43-fourth mounting groove; 44-a second limit post; 50-fixing the sheet metal part; 60-soaking plate; 70-busbar; 80-an insulating plate; 200-car body.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As described in the background art, the key of the endurance mileage of the new energy electric vehicle is that the power battery, the current battery cell specification of the power battery is square, soft package and cylindrical, the inside of the cylindrical battery cell is further divided into 4680, 18650 and 21700, the higher the energy density of the single body is, the higher the utilization rate of the limited space size in the battery package is, and the common grouping mode of the current cylindrical battery cell is as follows: the length direction of the battery core is transversely placed, two ends of the battery core are respectively provided with a plastic clamping plate, a plurality of battery cores are clamped to form a module, then a plurality of modules are connected into a large module through structural members, and then a plurality of modules in the large module are connected in series through flexible connection to form a battery pack, so that the required platform voltage and rated energy requirements are met. However, the battery pack of this assembly method is complicated in structure, and has a large number of parts, resulting in high costs and low production efficiency.

Based on this, referring to fig. 1-7, the embodiment of the utility model provides a battery pack 100 and an electric vehicle 1000, which can effectively solve the above-mentioned technical problems, that is, the number of parts can be reduced, the cost can be reduced, and the production efficiency can be improved. The battery pack 100 and the electric vehicle 1000 will be described in detail below.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electric vehicle 1000 according to the present embodiment, and referring to fig. 1, the electric vehicle 1000 includes a battery pack 100 and a vehicle body 200, wherein the battery pack 100 is mounted on the vehicle body 200 to provide electric energy for the vehicle body 200, thereby realizing various functions of the vehicle body 200.

Referring to fig. 2-7, the battery pack 100 will be described in detail.

It should be noted that, when the battery pack 100 is placed in a conventional manner, the relative positional relationship is clearly known to those skilled in the art, in the front, rear, left, right, up and down directions shown in fig. 2 to 7.

Referring to fig. 2, fig. 2 is an exploded view of the battery pack 100 provided in the present embodiment, and referring to fig. 2, the battery pack 100 includes a housing 10, a lower plate 20, a battery pack 30, an upper cover plate 40, and a fixing sheet metal part 50, wherein the lower plate 20 and the battery pack 30 are disposed in the housing 10, the lower plate 20 is connected with the housing 10, the battery pack 30 is fixed above the lower plate 20, the upper cover plate 40 is disposed above the battery pack 30, the fixing sheet metal part 50 is disposed at one side of the upper cover plate 40, and two ends of the fixing sheet metal part 50 are respectively connected with the upper cover plate 40 and the housing 10 for fixing the battery pack 30; the battery pack 30 can be fastened by the upper cover plate 40 and the lower base plate 20, and the battery pack 30 can be fixed inside the case 10 by the fixing sheet metal member 50. The battery pack 100 has a simple structure, and can reduce the number of parts, reduce the cost and improve the production efficiency.

Specifically, the housing 10 includes a front wall 11, a rear wall 12, a left wall 13, a right wall 14, and a bottom wall 15, the left wall 13, the front wall 11, the right wall 14, and the rear wall 12 are sequentially connected, and a mounting cavity 16 is formed around the bottom wall 15, and it is easy to understand that the mounting cavity 16 is used for mounting the battery pack 30.

Further, fixing sheet metal parts 50 are respectively disposed on two opposite sides of the upper cover 40, and two ends of each fixing sheet metal part 50 are respectively connected with the upper cover 40 and the bottom wall 15 of the housing 10 for fixing the battery pack 30. It should be noted that, in the present embodiment, the number of the fixing sheet metal parts 50 is two, and the fixing sheet metal parts 50 are respectively disposed on two opposite sides of the upper cover plate 40, however, in other embodiments, the number of the fixing sheet metal parts 50 may be four, that is, the fixing sheet metal parts 50 are disposed in the front, rear, left and right directions of the upper cover plate 40, it is easy to understand that the fixing sheet metal parts 50 are disposed in four numbers, so that the stability of the battery pack 30 is improved, but the cost is increased and the assembly efficiency is reduced, and therefore, the number of the fixing sheet metal parts 50 can be determined according to the actual production situation.

In order to facilitate the installation of the lower plate 20 in the housing 10, please refer to fig. 3, fig. 3 is a schematic structural diagram of the housing 10 provided in this embodiment, and referring to fig. 2 and 3, the bottom wall 15 of the housing 10 has a first limiting post 17, and the first limiting post 17 can perform positioning and limiting functions on the lower plate 20. Further, referring to fig. 4, fig. 4 is a schematic structural diagram of a first view angle of the lower base plate 20 according to the present embodiment, and referring to fig. 2-4, the lower base plate 20 is provided with a limiting hole 23, the first limiting post 17 is disposed at the limiting hole 23, and the lower base plate 20 can be fixed on the bottom wall 15 of the housing 10 by matching the first limiting post 17 with the limiting hole 23.

It should be noted that, in this embodiment, in order to better stabilize the lower plate 20, the bottom wall 15 of the housing 10 and the lower plate 20 are adhered and fixed by a structural adhesive, specifically, according to the bottom shape of the lower plate 20, the structural adhesive may be applied to the bottom wall 15 of the housing 10 along the path of the shape, then the limiting hole 23 is aligned with the first limiting post 17 to position, and finally the lower plate 20 is adhered to the bottom wall 15 of the housing 10.

In order to mount the battery cells 31 on the lower base plate 20, please refer to fig. 5, fig. 5 is a schematic diagram of a second view angle of the lower base plate 20 provided in this embodiment, and in combination with fig. 2 and fig. 5, a plurality of first mounting grooves 21 are formed in the top of the lower base plate 20, the battery pack 30 includes a plurality of battery cells 31, and the bottoms of the battery cells 31 are disposed in one-to-one correspondence with the plurality of first mounting grooves 21, so that the bottoms of the battery cells 31 are all mounted in the first mounting grooves 21, thereby fixing the battery cells 31.

Similarly, in order to assemble the upper cover 40 with the battery cells 31, please refer to fig. 6, fig. 6 is a schematic diagram of a first view angle of the upper cover 40 provided in this embodiment, and in combination with fig. 2 and fig. 6, a plurality of second mounting grooves 41 are formed at the bottom of the upper cover 40, and the tops of the plurality of battery cells 31 are arranged in a one-to-one correspondence with the plurality of second mounting grooves 41, so that the tops of each battery cell 31 are all mounted in the second mounting groove 41, and each battery cell 31 can be better fixed by the cooperation of the first mounting groove 21 and the second mounting groove 41, so that the whole battery pack 30 is fastened and is not easy to shake.

In the present embodiment, since the cylindrical battery cell 31 is used, the shapes of the first mounting groove 21 and the second mounting groove 41 are all circular, and of course, in other embodiments, the shapes of the first mounting groove 21 and the second mounting groove 41 are not limited, and the shapes thereof may be determined according to the shape of the battery cell 31.

With continued reference to fig. 2, in order to heat the battery in a cold condition, the battery pack 100 further includes a soaking plate 60, and the soaking plate 60 is disposed between the lower base plate 20 and the battery pack 30. Referring to fig. 2 and 5, a third mounting groove 22 is further formed in the top of the lower plate 20, and the soaking plate 60 is disposed in the third mounting groove 22.

In this embodiment, the third mounting groove 22 and the first mounting groove 21 may be the same mounting groove, that is, the soaking plate 60 may be directly embedded into the first mounting groove 21 of the lower plate 20, specifically, structural adhesive is applied on the surface of the first mounting groove 21, the soaking plate 60 is adhered to the lower plate 20, then heat-conducting adhesive is applied on the surface of the soaking plate 60, and the bottom of the battery cell 31 is adhered and fixed by the heat-conducting adhesive. In other embodiments, the third mounting groove 22 may be below the first mounting groove 21, and the bottom of the battery cell 31 is mounted in the first mounting groove 21 after the vapor chamber 60 is fixed in the third mounting groove 22.

In the embodiment, the surface of the second mounting groove 41 may be coated with a structural adhesive, so that the top of the battery cell 31 is adhered to the second mounting groove 41, thereby improving the stability of the battery cell 31.

The mode of embedding the soaking plate 60 in the lower base plate 20 has small heat loss, and can improve the heating integration level and the heat management heating efficiency; meanwhile, the soaking plate 60 can also serve as a structural member, so that the mechanical property of the battery pack 100 is improved; in addition, the heat-conducting glue at the bottom of the battery cell 31 not only has a heat-conducting effect, but also has the effect of fixing the battery cell 31, and the heat-conducting glue has lower bonding strength than the structural glue and can be conveniently maintained and detached.

With continued reference to fig. 2, in order to realize serial connection or parallel connection of the battery cells 31 in the battery pack 30, the battery pack 100 further includes a bus bar 70, in this embodiment, since the number of parts is required to be reduced and the production efficiency is required to be improved, the positive and negative electrodes of the battery cells 31 are all on top of the battery cells 31, and single-side welding of the battery cells 31 and the bus bar 70 can be realized, so that the bus bar 70 is disposed above the upper cover plate 40.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a second view angle of the upper cover 40 according to the present embodiment, and in combination with fig. 2 and fig. 7, the upper cover 40 is further provided with a through hole 42, and the bus bar 70 is welded with the battery cell 31 through the through hole 42 to realize serial connection or parallel connection of the battery cell 31. In this embodiment, a plurality of bus bars 70 are provided, so the number of through holes 42 is also plural, and the specific number thereof can be determined according to the number of the battery cells 31 and the overall design requirement of the battery pack 100.

In order to better fix the bus bar 70, the top of the upper cover plate 40 is further provided with a fourth mounting groove 43, and the bus bar 70 is disposed in the fourth mounting groove 43. Meanwhile, considering the installation convenience, the top of the upper cover plate 40 is further provided with a second limiting post 44, the second limiting post 44 is arranged in the fourth mounting groove 43, and of course, the bus bar 70 is correspondingly provided with a mounting hole (not shown), and the bus bar 70 can be positioned and limited through the assembly of the mounting hole and the second limiting post 44, so that the installation is convenient.

With continued reference to fig. 2, the battery pack 100 further includes an insulating plate 80, where the insulating plate 80 is disposed above the upper cover 40 and connected to the upper cover 40. In this embodiment, the insulating plate 80 is adhered to the upper cover plate 40 by a structural adhesive, specifically, the structural adhesive is applied to the surface of the insulating plate 80, and then the insulating plate 80 is adhered to the top of the upper cover plate 40.

The insulating plate 80 can realize insulation protection of the battery pack 30, prevent foreign matters from falling into the battery pack 30 to generate short circuit, and after the structural adhesive is solidified, the surface tension of the insulating plate 80 is utilized to improve the first-order frequency of the battery pack 100, structural members do not need to be transversely (left-right direction) added above the battery pack 30, the degree of freedom of the battery pack 30 in the up-down direction can be restrained, and stability and reliability are improved. Meanwhile, the bonding structure has smaller shearing strength, so the bonding structure is easy to tear off and can be convenient to maintain.

In addition, the top of the upper cover plate 40 and the top of the battery cell 31 are adhered by structural adhesive, the bottom of the battery cell 31 is adhered by heat-conducting adhesive and the soaking plate 60, and the bus bar 70 adopts a single-side welding mode, so that the battery cell 31 can be conveniently maintained and replaced in the later period.

In summary, the embodiment of the utility model provides a battery pack 100, the battery pack 100 includes a housing 10, a bottom plate 20, a battery pack 30, an upper cover plate 40 and a fixing sheet metal part 50, wherein the bottom plate 20 and the battery pack 30 are disposed in the housing 10, the bottom plate 20 is connected with the housing 10, the battery pack 30 is fixed above the bottom plate 20, the upper cover plate 40 is disposed above the battery pack 30, the fixing sheet metal part 50 is disposed at one side of the upper cover plate 40, and two ends of the fixing sheet metal part 50 are respectively connected with the upper cover plate 40 and the housing 10 for fixing the battery pack 30; the battery pack 30 can be fastened by the upper cover plate 40 and the lower base plate 20, and the battery pack 30 can be fixed inside the case 10 by the fixing sheet metal member 50. The battery pack 100 has a simple structure, and can reduce the number of parts, reduce the cost and improve the production efficiency.

Meanwhile, each cell 31 can be better fixed through the matching of the first mounting groove 21 of the lower base plate 20 and the second mounting groove 41 of the upper cover plate 40, so that the whole battery pack 30 is fastened and is not easy to shake; the soaking plate 60 is embedded in the lower base plate 20, so that the heat loss is small, the heating integration level and the heat management heating efficiency can be improved, the soaking plate 60 can also serve as a structural member, and the mechanical property of the battery pack 100 is improved; the insulating plate 80 can realize insulating protection of the battery pack 30, prevent foreign matters from falling into the battery pack 30 to generate short circuit, and can restrict the freedom degree of the battery pack 30 in the up-down direction by utilizing the surface tension of the insulating plate 80 after the structural adhesive is solidified, so that the stability and the reliability are improved; the upper cover plate 40 is adhered to the top of the battery cell 31 through structural adhesive, the bottom of the battery cell 31 is adhered to the soaking plate 60 through heat-conducting adhesive, and the heat-conducting adhesive has a heat-conducting effect and also has the effect of fixing the battery cell 31.

The electric vehicle 1000 includes the battery pack 100, which has all the functions of the battery pack 100.

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

Claims (10)

1. A battery pack, comprising:

a housing (10);

a lower base plate (20), wherein the lower base plate (20) is arranged in the shell (10), and the lower base plate (20) is connected with the shell (10);

a battery pack (30), wherein the battery pack (30) is arranged in the shell (10) and is fixed above the lower bottom plate (20);

an upper cover plate (40), wherein the upper cover plate (40) is arranged above the battery pack (30); and

the battery pack comprises an upper cover plate (40), a fixing sheet metal part (50), a battery pack (30) and a connecting plate, wherein the fixing sheet metal part (50) is arranged on one side of the upper cover plate (40), and two ends of the fixing sheet metal part (50) are respectively connected with the upper cover plate (40) and the shell (10) so as to be used for fixing the battery pack (30).

2. The battery pack according to claim 1, wherein a plurality of first mounting grooves (21) are formed in the top of the lower base plate (20), the battery pack (30) comprises a plurality of battery cells (31), and the bottoms of the plurality of battery cells (31) are arranged in one-to-one correspondence with the plurality of first mounting grooves (21).

3. The battery pack according to claim 1, wherein a plurality of second mounting grooves (41) are formed in the bottom of the upper cover plate (40), the battery pack (30) comprises a plurality of battery cells (31), and the tops of the battery cells (31) are arranged in one-to-one correspondence with the plurality of second mounting grooves (41).

4. The battery pack according to claim 1, wherein the battery pack (100) further comprises a soaking plate (60), the soaking plate (60) being disposed between the lower base plate (20) and the battery pack (30).

5. The battery pack according to claim 4, wherein a third mounting groove (22) is further formed in the top of the lower plate (20), and the soaking plate (60) is disposed in the third mounting groove (22).

6. The battery pack according to claim 1, wherein the battery pack (100) further comprises a bus bar (70), the bus bar (70) is disposed above the upper cover plate (40), the upper cover plate (40) is provided with a through hole (42), and the bus bar (70) is connected with the battery pack (30) through the through hole (42).

7. The battery pack according to claim 1, wherein a limiting hole (23) is formed in the bottom of the lower base plate (20), the bottom wall (15) of the housing (10) has a first limiting post (17), and the first limiting post (17) is disposed in the limiting hole (23).

8. The battery pack according to claim 1, wherein the battery pack (100) further comprises an insulating plate (80), and the insulating plate (80) is disposed above the upper cover plate (40) and connected to the upper cover plate (40).

9. The battery pack according to claim 1, wherein the fixing sheet metal parts (50) are provided on opposite sides of the upper cover plate (40), and both ends of each fixing sheet metal part (50) are respectively connected with the upper cover plate (40) and the case (10) for fixing the battery pack (30).

10. An electric vehicle characterized by comprising a battery pack (100) according to any one of claims 1-9.