CN219892327U - Battery pack and vehicle - Google Patents

Abstract

The utility model provides a battery pack and a vehicle, which comprise a first battery module and a second battery module, wherein the length of the second battery module is larger than that of the first battery module, at least one connecting end plate is arranged in the middle of the second battery module, the second battery module is divided into at least two electric core areas, the connecting end plate comprises a connecting part and a side plate, the side plate is abutted with the second battery module, one end of the first battery module is aligned with and connected with one end of one electric core area, the other end of the first battery module is aligned with and connected with the connecting end plate, the first battery module is stably connected above the second battery module which is not equal in length, and the whole double-layer battery module structure is stably connected through the connecting end plate, so that the problem that the existing double-layer battery module which is not equal in length cannot be further stably connected is effectively solved.

Description

Battery pack and vehicle

Technical Field

The utility model relates to the technical field of new energy, in particular to a battery pack and a vehicle.

Background

With the rapid development of new energy automobile industry in China, electric automobiles gradually appear in daily life of people, and with the popularization and application of the electric automobiles, consumers begin to seek electric automobiles with higher endurance mileage. Generally, the most direct method for increasing the endurance mileage of an electric vehicle in the industry is to increase the electric quantity of a battery pack, and many methods for increasing the electric quantity of the battery pack are common, such as increasing the energy density of battery cells, increasing the number of battery modules in the battery pack, and increasing the volume utilization rate of the battery pack.

When the number of battery modules in the traditional battery pack is increased, the method of increasing the number of the battery modules in the battery pack is adopted, the increased battery modules are generally stacked on the original battery modules, when a double-layer battery module with large electric quantity is adopted, the double-layer battery modules are required to be arranged to meet the requirement of the whole pack of double-layer module framework, but the existing double-layer module is generally connected with the upper and lower layers of the battery modules by adopting a bracket, if the upper and lower layers of battery modules with unequal lengths are arranged, the bracket cannot further improve the rigidity of the double-layer module, and the upper layer module cannot be stably connected with the lower layer module.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery pack and a vehicle, so as to solve the problem that the existing unequal-length double-layer module cannot be further stably connected.

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

the present utility model provides a battery pack, comprising:

a first battery module;

the first battery module is arranged above the second battery module, and the length of the second battery module is longer than that of the first battery module;

the connecting end plate is arranged in the middle of the second battery module and divides the second battery module into at least two battery core areas and comprises a connecting part and a side plate, two ends of the connecting part are fixedly connected with the side plate respectively, and the side plate is abutted with the second battery module;

one end of the first battery module is aligned with and connected with one end of one of the battery cell areas, and the other end of the first battery module is aligned with and connected with the connecting part.

Further, along the length direction parallel to the first battery module, the two ends of the first battery module are respectively provided with a first end plate, and along the length direction parallel to the second battery module, the two ends of the second battery module are respectively provided with a second end plate;

the first end plate of first battery module one end aligns and connects with one of them electric core region's one end, and the first end plate of first battery module other end aligns and connects with connecting portion.

Further, when the cell area is three or more, the first end plates at the two ends of the first battery module are aligned with and connected to the connecting parts at different positions respectively.

Further, the battery pack also includes at least one end plate bracket;

the first battery module is arranged in a battery core area at the upper side of the second battery module;

one end plate and the second end plate are connected with an end plate bracket respectively.

Further, the battery pack also includes at least one end plate bracket;

the first battery module is arranged in a battery core area at the middle position above the second battery module;

one end plate and the connecting end plate are connected with an end plate bracket respectively.

Further, the battery pack further includes:

the first battery module and the second battery module are positioned in the shell;

the support beam is fixedly connected with the shell;

the connecting end plate comprises a first groove and a second groove, the first groove and the second groove are oppositely arranged, the supporting beam is embedded into the first groove, and one end of the end plate support is embedded into the second groove.

Further, the battery pack further comprises a first connecting piece and a second connecting piece, the first end plate is provided with a first through hole, the second end plate and the connecting end plate are both provided with a second through hole, the end plate bracket is provided with a third through hole, and the first through hole, the second through hole and the third through hole are coaxial;

the first connecting piece penetrates through the first through hole, the second through hole and the third through hole simultaneously and is connected with the shell;

the second connecting piece passes through the second through hole and is connected with the casing.

Further, the length of the first connecting member is greater than that of the second connecting member, and the distance between the first connecting member and the center of the first battery module in the width direction is greater than that between the second connecting member and the center of the first battery module in the width direction.

Further, the battery pack also comprises a mounting bracket, and the mounting bracket is connected with the connecting end plate;

along the width direction of second battery module, the both sides of second battery module are provided with the installing support respectively, and the shape of installing support is the same with the both sides side shape of second battery module.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the utility model provides a battery pack, which comprises a first battery module and a second battery module, wherein the first battery module and the second battery module are two battery modules with different lengths, and the length of the second battery module is larger than that of the first battery module. The middle of the second battery module is provided with at least one connecting end plate, the second battery module is divided into at least two battery core areas, the connecting end plate comprises a connecting part and side plates, the connecting part is connected with the side plates on two sides, the height of the side plates is the same as that of the second battery module, the battery module cells can be prevented from being scratched by the connecting part, one end of the first battery module is aligned with one end of the second battery module, the other end of the first battery module is aligned with the connecting part, and therefore the first battery module is stably connected above the second battery module which is not equal in length, the stability of the whole double-layer battery module structure is guaranteed, and the problem that the existing double-layer battery module which is not equal in length cannot be further stably connected is effectively solved.

Another object of the present utility model is to provide a vehicle, which solves the problem that the existing unequal-length double-layer module cannot be connected stably.

The vehicle has the same advantages as the battery pack described above over the prior art, and will not be described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate and explain the utility model and together with the description serve to explain the utility model. In the accompanying drawings:

fig. 1 is a schematic view illustrating the structure of a first battery module and a second battery module in an embodiment of the present utility model when the first battery module and the second battery module are positioned inside a case;

fig. 2 is a schematic structural view of a second battery module according to an embodiment of the present utility model divided into three battery cell regions;

fig. 3 is a schematic view illustrating a structure in which a first battery module and a second battery module are connected according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a third end plate according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the first connector of the present utility model penetrating the first end plate, the connecting end plate and the end plate bracket;

FIG. 6 is a schematic view of the structure of the second connector of the present utility model penetrating the first end plate, the connecting end plate and the end plate bracket;

fig. 7 is a simplified view illustrating a structure in which a first battery module is placed over a cell region at a side position of a second battery module according to an embodiment of the present utility model;

fig. 8 is a simplified view of a structure in which a first battery module is placed over a cell region in a middle position of a second battery module according to an embodiment of the present utility model;

FIG. 9 is a schematic view of the structure of a mounting bracket according to an embodiment of the present utility model;

fig. 10 is an enlarged view at a in fig. 2.

Reference numerals illustrate:

1-first battery module, 11-first end plate, 2-first battery module, 21-second end plate, 3-connection end plate, 31-connection part, 32-side plate, 33-second through hole, 34-first groove, 35-second groove, 4-end plate bracket, 5-shell, 6-supporting beam, 7-first connection piece, 8-second connection piece, 9-installation bracket, 91-reinforcing rib.

Detailed Description

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

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings in conjunction with the embodiments.

A battery pack, referring to fig. 1 to 8, comprising: a first battery module 1; the second battery module 2, the first battery module 1 is placed above the second battery module 2, and the length of the second battery module 2 is longer than that of the first battery module 1; the connecting end plate 3 is arranged in the middle of the second battery module 2, the connecting end plate 3 divides the second battery module 2 into at least two battery core areas, the connecting end plate 3 comprises a connecting part 31 and a side plate 32, two ends of the connecting part 31 are respectively fixedly connected with the side plate 32, the height of the side plate 32 can be the same as or different from that of the second battery module 2, and the side plate 32 is abutted against the second battery module 2; one end of the first battery module 1 is aligned with one end of one of the cell regions, and the other end of the first battery module 1 is aligned with the connecting portion 31.

Specifically, the embodiment of the utility model provides a battery pack, which is combined with the illustrations of fig. 1 to 8, and comprises a first battery module 1 and a second battery module 2, wherein the first battery module 1 is arranged above the second battery module 2, the length of the second battery module 2 is larger than that of the first battery module 1, and the first battery module 1 and the second battery module 2 are two battery modules with different lengths. At least one connection end plate 3 is further provided in the middle of the second battery module 2, and the second battery module 2 is partitioned into at least two cell regions by the connection end plate 3. The first battery module 1 is placed above one of the battery cell areas, and it is worth noting that the length of the battery cell area where the first battery module 1 is placed should be the same as the length of the first battery module 1, so that one end of the battery cell area can be provided with the connecting end plate 3 by design, and the first battery module 1 can be supported not to shake above the second battery module 2, in order to ensure the stability of the structures of the first battery module 1 and the second battery module 2, one end of the first battery module 1 is aligned with one end of the battery cell area and connected, and the other end of the first battery module 1 is aligned with the connecting part 31 and connected, so that the connection between two battery modules with different lengths can be realized.

Further, the connection end plate 3 includes a connection portion 31 and a side plate 32, two ends of the connection portion 31 are fixedly connected with the side plate 32 respectively, referring to fig. 4, the connection end plate 3 is in an "H" structure, the connection end plate 3 is located between the electric cores of the second battery module 2, the side plate 32 is abutted with the electric cores of the second battery module 2, the height of the side plate 32 is the same as that of the second battery module 2, in order to prevent that when the height of the side plate 32 is lower than that of the electric cores, the contact area between the electric cores and the side plate 32 is small, and the electric cores and the connection end plate 3 are abutted with each other, so that the electric cores may be damaged due to extrusion. The connecting portion 31 is located the centre of two curb plates 32 to the high battery cell height that is also less than of connecting portion 31, the connecting portion of connecting portion 31 and curb plate 32 is concentrated in the centre of connecting end plate 3 for concentrating, and the atress is more accurate concentrated, and the top of connecting portion 31 is connected with the other end alignment of first battery module 1, also more does benefit to the connection of connecting end plate 3 and the other end of first battery module 1, improves the stability of whole unequal length double-deck battery module structure, has effectively solved the problem that current unequal length double-deck module can not further stable connection.

It should be noted that, when there is only one connecting end plate 3 in the middle of the second battery module 2, the connecting end plate 3 divides the second battery module 2 into two battery cell areas, one end of each battery cell area is the connecting end plate 3, and the other end of each battery cell area is the end of the second battery module 2. For such a second battery module 2 having two cell regions, when the first battery module 1 is placed over the second battery module 2 and within the cell region of equal length thereof, both ends of the first battery module 1 are respectively aligned with and connected to both ends of the cell region.

When the second battery module 2 is provided with N (N is more than or equal to 2) connecting end plates 3 in the middle, the connecting end plates 3 divide the second battery module 2 into N+1 electric core areas, and at the moment, the N+1 electric core areas comprise electric core areas at the side close position of the second battery module 2 and electric core areas at the middle position of the second battery module 2. It should be noted that, the cell region at the middle position is other cell regions remaining after the cell region at the side position of the second battery module 2 is removed. For such a second battery module 2 having n+1 battery cell regions, if the first battery module 1 is placed in the battery cell region at the upper side position of the second battery module 2, both ends of the first battery module 1 are respectively aligned with and connected to both ends of the battery cell region.

For example, when there are 2 (n=2) connection end plates 3 in the middle of the second battery module 2, the connection end plates 3 divide the second battery module 2 into 3 cell areas, and referring to fig. 7, the first battery module 1 in fig. 7 is placed in the cell area above the second battery module 2, and at this time, one end of the cell area is provided with the connection end plates 3, and the other end is the end of the second battery module 2. If the first battery module 1 is placed in the cell area above the middle of the second battery module 2, referring to fig. 8, two ends of the first battery module 1 in fig. 8 are respectively aligned with two ends of the placed cell area, wherein each of the two ends of the cell area is provided with a connection end plate 3.

Alternatively, referring to fig. 1 to 8, first end plates 11 are respectively provided at both ends of the first battery module 1 in a direction parallel to the length direction of the first battery module 1, and second end plates 21 are respectively provided at both ends of the second battery module 2 in a direction parallel to the length direction of the second battery module 2; the first end plate 11 of one end of the first battery module 1 is aligned with and connected to one end of one of the cell regions, and the first end plate 11 of the other end of the first battery module 1 is aligned with and connected to the connection part 31.

Specifically, in conjunction with the illustrations of fig. 1 to 8, the first end plates 11 are respectively provided at both ends of the first battery module 1 in the direction parallel to the length direction of the first battery module 1, i.e., the X-axis direction in fig. 1, and the second end plates 21 are also respectively provided at both ends of the second battery module 2 in the direction parallel to the length direction of the second battery module 2, i.e., the X-axis direction in fig. 1. In general, when two battery modules of equal length are stacked, in order to stabilize the two battery modules, upper and lower battery modules are fixed by connecting end plates provided at both ends of the two battery modules. However, when two battery modules of different lengths are stacked, connection cannot be made through the end plates at both ends. Therefore, in the embodiment of the utility model, at least one connecting end plate 3 is further arranged in the middle of the second battery module 2, and the second battery module 2 is divided into at least two electric core areas by the connecting end plate 3. When there is only one connection end plate 3 in the middle of the second battery module 2, the connection end plate 3 partitions the second battery module 2 into two cell areas, at which time one end of each cell area is provided with a second end plate 21 and the other end is provided with the connection end plate 3. The first battery module 1 is placed to the top of one of them electric core region for guarantee the stability of first battery module 1 and the 2 structures of second battery module for first battery module 1 can not rock, and the first end of first battery module 1 and second battery module 2, second battery module 2 are provided with the one end of second end plate 21 promptly, and first end plate 11 aligns and is connected with second end plate 21, can promote the interconnect of first end position of first battery module 1 and second battery module 2. The length of the cell region above which the first battery module 1 is placed should be consistent with the length of the first battery module 1, one end of the cell region is the connection end plate 3, and the connection end plate 3 of one end of the cell region is also aligned with and connected to the first end plate 11 of the first battery module 1 on the basis that the second end plate 21 of the other end of the cell region is already aligned with and connected to the first end plate 11. Because the length of the battery cell area is the same as that of the first battery module 1, the connection between the battery cell area and the first battery module 1 is performed through the end plates at the two ends, so that the first battery module 1 is fixed above the second battery module 2 and connected with the second battery module 2, and the connection stability between the two battery modules can be further enhanced through the end plate structure.

Alternatively, referring to fig. 2, when the cell area is three or more, the first end plates 11 at both ends of the first battery module 1 are aligned with and connected to the connection parts 31 at different positions, respectively.

Specifically, in the embodiment of the present utility model, when there are 2 (n=2) connection end plates 3 in the middle of the second battery module 2, the connection end plates 3 divide the second battery module 2 into 3 cell areas, that is, the connection end plates 3 divide the second battery module 2 into three cell areas, and in combination with the schematic of fig. 2, the lengths of the three cell areas are L1, L2, and L3 in sequence, the first end plates 11 at two ends of the first battery module 1 are aligned with and connected to the connection end plates 3, respectively, meaning that the first battery module 1 is placed above the cell area with the length of L2, the connection end plates 3 are disposed at two ends of the cell area, and the length of the cell area is the same as the length of the first battery module 1. Similarly, the first battery module 1 may be placed above the battery cell area with the length L1 or above the battery cell area with the length L3, but the length of the battery cell area where the first battery module 1 is placed needs to be ensured to be the same as the length of the first battery module 1. Further, the number of the connection end plates 3 may be three, and the second battery module 2 may be divided into four battery cell areas, etc., except for the case shown in the embodiment of the present utility model, the embodiment of the present utility model is not limited herein, and may be specifically selected according to practical situations.

Optionally, referring to fig. 3 to 8, the battery pack further comprises at least one end plate bracket 4; the first battery module 1 is arranged in a battery core area at the upper side of the second battery module 2; one end plate 11 and the second end plate 21 are connected with one end plate bracket 4 between the other first end plate 11 and the connecting end plate 3.

Specifically, referring to fig. 3 to 8, in the embodiment of the present utility model, the battery pack further includes at least one end plate support 4, two end plate supports 4 are respectively located at two ends of the first battery module 1 in the X-axis direction shown in fig. 3, one end plate support 4 is respectively connected with the first end plate 11 and the connecting end plate 3 in the depth direction of the case 1, i.e., in the Z-axis direction shown in fig. 3, the other end plate support 4 is respectively connected with the first end plate 11 and the second end plate 21, the end plates of the two battery modules are connected through the end plate supports 4, and the length of the end plate support 4 in the Z-axis direction just can fill the gap between the first end plate 11 and the second end plate 21 and between the first end plate 11 and the connecting end plate 3, so that the whole double-layer module structure is more stable, the length of the end plate in the Z-axis direction can be reduced, and the manufacturing cost of the end plate can be reduced.

Optionally, referring to fig. 3 to 8, the battery pack further comprises at least one end plate bracket 4; the first battery module 1 is arranged in a battery core area at the middle position above the second battery module 2; one end plate 11 is connected to the connecting end plate 3, and one end plate bracket 4 is connected to each of the other end plates 11 and 3.

Specifically, except for the above-described embodiment in which one connection end plate 3 is provided in the middle of the second battery module 2, in combination with the illustrations of fig. 3 to 8, when two connection end plates 3 are provided in the middle of the second battery module 2, that is, the connection end plates 3 divide the second battery module 2 into three cell regions, the first battery module 3 may be placed above the most middle cell region, at which time the first end plates 11 at both ends of the first battery module 1 are respectively connected with the connection end plates 3 in the lower alignment, and in this case, end plate brackets 4 are provided between the first end plates 11 and the connection end plates 3, and the two end plate brackets 4 are respectively located at both ends of the first battery module 1 and both located between the first end plates 11 and the connection end plates 3. Similarly, the end plate bracket 4 is arranged to just fill the gap between the first end plate 11 and the connecting end plate 3, so that the whole double-layer module structure is more stable.

Optionally, referring to fig. 1 and 3, the battery pack further includes: a case 5 in which the first battery module 1 and the second battery module 2 are located; the support beam 6, the support beam 6 is fixedly connected with the shell 5; the connecting end plate 3 includes a first groove 34 and a second groove 35, the first groove 34 and the second groove 35 are oppositely disposed, the support beam 6 is embedded in the first groove 34, and one end of the end plate bracket 4 is embedded in the second groove 35.

Specifically, in conjunction with the illustrations of fig. 1 and 3, the connection end plate 3 includes a first groove 34 and a second groove 35, and one end of the end plate holder 4 is embedded in the second groove 35, so that the connection end plate 3 is connected in alignment with the end plate holder 4. The battery pack further comprises a shell 5 and a supporting beam 6, the supporting beam 6 is fixedly connected with the shell 5, the supporting beam 6 is simultaneously embedded into the first groove 34 and is connected with the connecting end plate 3, and the supporting beam 6 is also aligned and connected with the connecting end plate 3 due to the opposite arrangement of the first groove 34 and the second groove 35, namely, the end plate bracket 4, the connecting end plate 3 and the supporting beam 6 are aligned and mutually connected, the first battery module 1 and the second battery module 2 are positioned in the shell 5, and the first battery module 1 and the second battery module 2 are connected with the connecting end plate 3 through the arrangement of the supporting beam 6, so that the fixed connection between the first battery module 1 and the second battery module 2 and the inside of the shell 1 is driven, and the stability of the whole structure is improved.

Alternatively, referring to fig. 5 and 6, the battery pack further includes a first connection member 7 and a second connection member 8, the first end plate 11 is provided with a first through hole, the second end plate 21 and the connection end plate 3 are each provided with a second through hole 33, the end plate bracket 4 is provided with a third through hole, and the first through hole, the second through hole 33, and the third through hole are coaxial; the first connecting piece 7 penetrates through the first through hole, the second through hole 33 and the third through hole simultaneously to be connected with the shell 5; the second connection member 8 is connected to the housing 5 through the second through hole 33.

Specifically, with reference to the illustrations of fig. 5 and 6, the first end plate 11 is provided with a first through hole, the second end plate 21 and the connection end plate 3 are provided with a second through hole 33, the end plate holder 4 is provided with a third through hole, the first through hole, the second through hole 33 and the third through hole are coaxially arranged along the depth direction of the housing 1, i.e., the Z-axis direction shown in fig. 1, the number of the first through hole, the second through hole 33 and the third through hole is plural, and the number of the three is kept uniform. The battery pack further comprises a first connecting piece 7, the length of the first connecting piece 7 needs to meet the requirement that the first connecting piece 7 can penetrate through the first through hole, the second through hole 33 and the third through hole simultaneously to be connected with the shell 1, so that the first end plate 11, the second end plate 21 and the end plate support 4 can be connected with each other through the first connecting piece 7, meanwhile, the first battery module 1 and the second battery module 2 are connected and fixed with the shell 1 through the connection of the first connecting piece 7 and the shell 1, the connection stability of the double-layer module and the shell 1 is further improved, and shaking of the first battery module 1 relative to the second battery module 2 is avoided. The battery pack further comprises a second connecting piece 8, the second connecting piece 8 penetrates through the second through hole 33 to be connected with the shell 1, and the fact that the second battery module 2 and the shell 1 are connected and fixed through the second connecting piece 8 is also explained, and the length of the second connecting piece 8 needs to meet the requirement that the second connecting piece 8 can penetrate through the second through hole 33 to be connected with the shell 1. On the basis that the first connecting piece 7 is used for connecting the double-layer battery module and the shell 1, the second connecting piece 8 is added for connecting the second battery module 2 and the shell 1, so that the stability of the lower-layer battery module and the shell 1 in the double-layer battery module is improved, and the installation position of the second battery module 2 is also fixed.

Alternatively, the first connection member 7 has a length greater than that of the second connection member 8, and the first connection member 7 is spaced apart from the center of the first battery module 1 in the width direction of the first battery module 1 by a distance greater than that of the second connection member 8 from the center of the first battery module 1 in the width direction.

Specifically, the length of the first connecting member 7 is greater than that of the second connecting member 8, and the distance between the first connecting member 7 and the center of the first battery module 1 in the width direction of the first battery module 1 is greater than that between the second connecting member 8 and the center of the first battery module 2 in the width direction, that is, the Y-axis direction shown in fig. 1, and further, the distance between the first connecting member 7 and the base point is greater than that between the second connecting member 8 and the base point, that is, the first connecting member 7 is disposed on both sides of the outside of the second connecting member 8, in the width direction of the first battery module 1, that is, the center of the wide side of the first battery module 1 is the base point. When the length of the first connecting member 7 is greater than that of the second connecting member 8, if the shorter second connecting member 8 is disposed at a position farther from the base point, that is, the linear distance between the second connecting member 8 and the base point is greater than the linear distance between the first connecting member 7 and the base point, the first battery module 1 is mainly connected with the second battery module 3 and the housing 1 through the first connecting member 7, and since the connection between the first connecting member 7 and the second connecting member 8 is disposed, the second connecting member 8 does not exist at the coaxial position where the first connecting member 7 is disposed, so that the first connecting member 7 is disposed near the base point, and is close to the center of the first battery module 1 in the width direction, and the first connecting member 7 is not disposed at the two end portions of the first battery module 1 in the width direction, which may result in unstable connection between the first battery module 1 and the second battery module 2 and shake, and therefore, the first connecting member 8 is disposed at a position farther from the base point than the base point 1, that is further stable than the first connecting member 2.

It should be noted that, in the embodiment of the present utility model, since the number of through holes to be penetrated by the first connecting member 7 is greater than that of through holes to be penetrated by the second connecting member 8, the length of the first connecting member 7 may be set to be greater than that of the second connecting member 8, and the lengths of the first connecting member 7 and the second connecting member 8 may be the same, which may be selected according to practical situations, although the embodiment of the present utility model is not limited thereto.

Optionally, referring to fig. 2, 9 and 10, the battery pack further includes a mounting bracket 9, and the mounting bracket 9 is connected to the connection end plate 3; along the width direction of the second battery module 2, the two sides of the second battery module 2 are respectively provided with a mounting bracket 9, and the shape of the mounting brackets 9 is the same as the shape of the two side surfaces of the second battery module 2.

Specifically, in combination with the illustrations of fig. 2 and 9, the battery pack further includes a mounting bracket 9, and the mounting brackets 9 are provided on both sides of the second battery module 2 along the width direction of the second battery module 2, i.e., the Y-axis direction shown in fig. 2, respectively, protecting the second battery module 2 from both sides along the width direction of the second battery module 2, both preventing the scratch and breakage of the battery cells, and connecting with the connecting end plate 3 through the mounting brackets 9, and the two are connected to form a more stable bracket structure to protect the second battery module 2 separated into a plurality of battery cell areas by the connecting end plate 3, and in order to more attach to the second battery module 2, the shape of the mounting bracket 9 is the same as the shape of both side surfaces of the second battery module 2.

Referring to fig. 10, which is an enlarged view of the connection portion between the mounting bracket 9 and the connection end plate 3, the connection manner between the mounting bracket 9 and the connection end plate 3 may be a plurality of connection manners such as bolting, riveting or welding, and may be selected according to practical situations.

In addition, in combination with the illustration of fig. 9, the mounting bracket 9 is provided with a plurality of reinforcing ribs 91, and the reinforcing ribs 91 are a plurality of transverse reinforcing ribs and a plurality of longitudinal reinforcing ribs, so that the rigidity and the strength of the mounting bracket 9 can be comprehensively improved, and more loads are born.

The embodiment of the utility model also provides a vehicle, which comprises any battery pack, and in the vehicle provided with the battery pack, the problem that the existing unequal-length double-layer module cannot be connected stably further can be solved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A battery pack, comprising:

a first battery module (1),

the first battery module (1) is arranged above the second battery module (2), and the length of the second battery module (2) is larger than that of the first battery module (1);

the battery module comprises a connecting end plate (3), wherein at least one connecting end plate (3) is arranged in the middle of the second battery module (2), the connecting end plate (3) divides the second battery module (2) into at least two battery core areas, the connecting end plate (3) comprises a connecting part (31) and a side plate (32), two ends of the connecting part (31) are fixedly connected with the side plate (32) respectively, and the side plate (32) is abutted to the second battery module (2);

one end of the first battery module (1) is aligned with and connected with one end of one of the battery cell areas, and the other end of the first battery module (1) is aligned with and connected with the connecting part (31).

2. The battery pack according to claim 1, wherein first end plates (11) are respectively provided at both ends of the first battery module (1) in a direction parallel to the length direction of the first battery module (1), and second end plates (21) are respectively provided at both ends of the second battery module (2) in a direction parallel to the length direction of the second battery module (2);

the first end plate (11) at one end of the first battery module (1) is aligned with and connected to one end of one of the cell areas, and the first end plate (11) at the other end of the first battery module (1) is aligned with and connected to the connecting portion (31).

3. The battery pack according to claim 2, wherein when the cell area is three or more, the first end plates (11) at both ends of the first battery module (1) are aligned with and connected to the connection parts (31) at different positions, respectively.

4. The battery pack according to claim 2, further comprising at least one end plate bracket (4);

the first battery module (1) is arranged in the battery cell area at the upper side of the second battery module (2);

one end plate (11) and the second end plate (21) are connected, and one end plate bracket (4) is respectively connected between the other end plate (11) and the connecting end plate (3).

5. The battery pack according to claim 2, further comprising at least one end plate bracket (4);

the first battery module (1) is arranged in the battery cell area at the middle position above the second battery module (2);

one end plate (11) and the connecting end plate (3) are connected, and one end plate bracket (4) is respectively connected between the other end plate (11) and the connecting end plate (3).

6. The battery pack according to claim 4 or 5, further comprising:

a housing (5), wherein the first battery module (1) and the second battery module (2) are positioned inside the housing (5);

the supporting beam (6), the supporting beam (6) is fixedly connected with the shell (5);

the connecting end plate (3) comprises a first groove and a second groove, the first groove and the second groove are oppositely arranged, the supporting beam (6) is embedded into the first groove, and one end of the end plate support (4) is embedded into the second groove.

7. The battery pack according to claim 6, further comprising a first connector (7) and a second connector (8), the first end plate (11) being provided with a first through hole, the second end plate (21) and the connecting end plate (3) each being provided with a second through hole (33), the end plate holder (4) being provided with a third through hole, the first through hole, the second through hole (33) and the third through hole being coaxial;

the first connecting piece (7) penetrates through the first through hole, the second through hole (33) and the third through hole simultaneously and is connected with the shell (5);

the second connecting piece (8) passes through the second through hole (33) to be connected with the shell (5).

8. The battery pack according to claim 7, wherein the first connection member (7) has a length greater than that of the second connection member (8), and a distance between the first connection member (7) and a center of the first battery module (1) in a width direction of the first battery module (1) is greater than a distance between the second connection member (8) and a center of the first battery module (1) in a width direction.

9. The battery pack according to claim 1, further comprising a mounting bracket (9), the mounting bracket (9) being connected with the connection end plate (3);

along the width direction of second battery module (2), the both sides of second battery module (2) are provided with respectively installing support (9), just installing support (9) the shape with the both sides side shape of second battery module (2) is the same.

10. A vehicle, characterized in that the vehicle is provided with a battery pack according to any one of claims 1-9.