CN210805857U - End plate, battery module and battery package - Google Patents

Abstract

The utility model relates to the technical field of power battery packs, and provides an end plate, a battery module and a battery pack. The end plate of the present invention includes a casing and a battery management unit arranged inside the casing, the casing includes a first casing and a second casing that are detachably fastened together, and the first casing and the second casing are detachably fastened together. After the first casing and the second casing are fastened together, a cavity for accommodating the battery management unit can be defined inside. The end plate of the utility model can not only strengthen the fixation of the large-sized module and improve the stability of the module, but also integrates the design of the battery management unit inside the end plate, thereby solving the installation problem of the battery management unit, and the battery management unit After installation, it will not occupy the external space, which can effectively save the internal space of the battery pack.

Description

End plates, battery modules and battery packs

technical field

The utility model relates to the technical field of power battery packs, in particular to an end plate, a battery module and a battery pack.

Background technique

With the increasingly serious social energy crisis, new energy vehicles have attracted more and more attention from the society, especially electric vehicles. Among them, the power battery pack is an important part of the electric vehicle, and the module is the core component of the power battery pack.

In the process of module installation and arrangement, it is usually necessary to arrange the battery management unit (BMS, Battery Management System) in an independent space. Most of the current methods are to remove a module to arrange the BMS, or to set the BMS fixed point on the end plate, but this method is used. Will cause a waste of space. Therefore, how to arrange BMS with high utilization rate has become an urgent problem to be solved in power battery design.

Utility model content

In view of this, the present invention aims to provide a battery module and a battery pack with an integrated design of a battery management unit end plate and the end plate.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

An end plate, the end plate includes a casing and a battery management unit arranged inside the casing, the casing includes a first casing and a second casing that are detachably fastened together, the After the first casing and the second casing are fastened together, a cavity for accommodating the battery management unit can be defined inside.

Optionally, the top of the casing is provided with a socket for facilitating the insertion of the battery management unit and the FPC board.

Optionally, the battery management unit includes a slave control board, the slave control board is provided with a first positioning hole, and the first housing is provided with a corresponding first positioning hole for fixing the battery. the second positioning hole of the slave control board.

Optionally, the first casing and the second casing are arranged to be engaged with each other along the thickness direction of the end plate, and the inside of the first casing is provided with reinforcements extending along the thickness direction of the end plate. The reinforcing rib is provided with a mounting seat extending toward the second housing, the second positioning hole is formed inside the mounting seat, and the reinforcing rib and the slave control board are spaced apart.

Optionally, two sides of the inside of the first housing are provided with partitions extending along the height direction of the end plate, the reinforcing ribs are arranged between the partitions on both sides, and the partitions are connected to the partitions. Weight reduction holes are arranged between the ends on both sides of the first shell.

Optionally, the partition plate is provided with a first installation hole, the second housing is provided with a second installation hole corresponding to the first installation hole and used for passing fasteners, the A groove for avoiding the fastener is formed around the second mounting hole portion of the outer wall of the second housing.

A second aspect of the present invention provides a battery module. The battery module includes a plurality of battery packs, a connection end plate located between the ends of two adjacent battery packs, and a connection end plate disposed on two sides of the battery packs. The side plate on the side and the positioning end plate connected with both ends of the side plate, and the connecting end plate is the end plate described in any of the above solutions.

Optionally, the tops of two adjacent cell groups are connected by a bus bar, and an insulating layer is sleeved on the bus bar.

Optionally, the length of the connection end plate is set to match the length of the end portion of the cell group, and both sides of the connection end plate are fixed to the side plate.

A third aspect of the present invention provides a battery pack, including the battery module described in the above solution.

Compared with the prior art, the end plate of the present invention has the following advantages:

The end plate of the utility model can not only strengthen the fixation of the large-sized module and improve the stability of the module, but also integrates the design of the battery management unit inside the end plate, thereby solving the installation problem of the battery management unit, and the battery management unit After installation, it will not occupy the external space, which can effectively save the internal space of the battery pack.

Other features and advantages of the present invention will be described in detail in the detailed description section that follows.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of an end plate according to an embodiment of the present invention;

2 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

3 is an exploded view of the battery module of FIG. 2;

Fig. 4 is the structural representation of the side plate in Fig. 2;

FIG. 5 is a schematic structural diagram of the bus bar in FIG. 2 .

Description of reference numbers:

1-shell, 2-battery management unit, 3-first shell, 4-second shell, 5-socket, 6-first positioning hole, 7-second positioning hole, 8-reinforcing rib, 9- Mounting base, 10—partition plate, 11—weight reduction hole, 12—first mounting hole, 13—second mounting hole, 14—groove, 15—cell group, 16—side plate, 17—positioning end plate, 18—bus bar, 19—insulation layer, 20—welding.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is conflict.

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

1 , according to an aspect of the present invention, an end plate is provided, the end plate includes a casing 1 and a battery management unit 2 disposed inside the casing 1 , the casing 1 includes a detachable The first shell 3 and the second shell 4 are snapped together, and after the first shell 3 and the second shell 4 are snapped together, they can define a space for accommodating the battery management unit 2 inside. cavity.

The end plate of the utility model has a battery management unit integrated therein, thereby solving the installation problem of the battery management unit, and the battery management unit does not occupy the external space after installation, thereby effectively saving the internal space of the battery pack. In addition, the design of the battery management unit does not affect the realization of the normal function of the end plate. During the module installation process, it can be placed between the ends of adjacent cell groups to strengthen the fixation of large-sized modules and extend the length of the module arrangement. , improve the stability of the module, and at the same time, the design of the battery management unit 2 can also improve the strength of the end plate itself, thereby improving the stiffness of the battery module in the length direction.

In order to ensure the connection between the battery management unit 2 and the FPC board, the top of the casing 1 is provided with a socket 5 that facilitates the insertion of the battery management unit 2 and the FPC board. A socket 5 is formed on the top of the casing 4 after being snapped together. The FPC board can be plugged into the battery management unit 2 through a plug-in.

Wherein, the battery management unit 2 includes a slave control board, the slave control board is provided with a first positioning hole 6, and the first housing 3 is provided with a corresponding first positioning hole 6 for The second positioning hole 7 of the slave control board is fixed, and the slave control board can be fixed on the first housing 3 through the fasteners passing through the first positioning hole 6 and the second positioning hole 7 in turn. The first shell 3 and the second shell 4 are snapped together to complete the assembly of the end plate.

In order to facilitate the installation of the slave control board, the first shell 3 and the second shell 4 are arranged to be fastened together along the thickness direction of the end plate, and the first shell 3 A reinforcing rib 8 extending in the thickness direction of the end plate, the reinforcing rib 8 is provided with a mounting seat 9 extending toward the second housing 4 , and the second positioning hole 7 is formed inside the mounting seat 9 . The rib 8 is spaced apart from the slave control board. It is worth noting that the reinforcing rib 8 is arranged on the inner wall of the first shell 3 and extends in the direction toward the second shell 4 , that is, along the thickness direction of the end plate, and the mounting seat 9 is arranged on the reinforcing rib 8 And also extend in the direction toward the second housing 4, the slave control board can be fixed on the mounting seat 9 through fasteners, and is in contact with the mounting seat 9, through the above design, the slave control board passes through the mounting seat 9 and the reinforcing rib. Connected, it can increase the stiffness of the end plate relatively on the basis of meeting the layout requirements of the slave control board. When used in the module, it can improve the stiffness of the battery module in the length direction, better limit the expansion of the battery cell, and effectively improve the module. stability.

In addition, partitions 10 extending along the height direction of the end plates are provided on both sides of the first housing 3 to further enhance the strength of the end plates, and the reinforcing ribs 8 are provided on the partitions 10 on both sides. In between, weight reduction holes 11 are provided between the partition plate 10 and the ends on both sides of the first casing 3 . The design of the weight-reducing holes 11 can reduce the overall weight on the basis of improving the strength of the end plate. Specifically, the weight-reducing holes 11 can be formed by interconnecting partitions. In this embodiment, the weight-reducing holes 11 are square.

It should be noted that, in order to realize the snap connection between the first casing 3 and the second casing 4, the partition plate 10 is provided with a first mounting hole 12, and the second casing 4 is provided with a The first mounting hole 12 corresponds to the second mounting hole 13 for passing through the fastener, and the outer wall of the second housing 4 forms a recess around the second mounting hole 13 to avoid the fastener. Slot 14.

The fixing between the first housing 3 and the second housing 4 can be achieved by passing the fasteners through the second mounting holes 13 and the first mounting holes 12 . Wherein, the first installation hole 12 is provided on one side of the partition plate 10, so as to provide stable support for the installation between the first housing 3 and the second housing 4, and the provision of the groove 14 can provide the installation of fasteners. Avoid space and prevent the fasteners from protruding from the surface of the casing after installation, so that the installation and fixation of the fasteners will not occupy additional space, and will not affect the fixation of the battery pack. Specifically, the groove 14 is arranged to be concave along the surface of the second casing 4 toward the first casing 3 , and further, the concave portion of the groove 14 is arranged to abut against the partition plate 10 to further enhance the rigidity of the end plate , to prevent deformation, so that the end plate can better resist the expansion of the cell.

2 and 3 , a second aspect of the present invention provides a battery module, the battery module includes a plurality of cell packs 15 and a connection end plate located between the ends of two adjacent cell packs 15 , The side plates 16 arranged on both sides of the cell group 15 and the positioning end plates 17 connected with both ends of the side plate 16, the connection end plates are the end plates described in any of the above solutions. The above-mentioned end plates of the present invention are arranged between the ends of adjacent cell groups 15 as connecting end plates, so that the FPC board on the top of the cell group 15 can be easily inserted into the slave control board inside the end plate.

Referring to FIG. 4 , both sides of the side plate 16 are provided with bent portions, so as to facilitate welding with the positioning end plates 17 at both ends to form a stable frame structure and improve the stability and safety of the battery module. In addition, the middle part of the side plate 16 is provided with a welding place 20 for fixing with the connecting end plate.

Referring to FIG. 5 , the tops of the two adjacent cell groups 15 are connected by a bus bar 18 , and an insulating layer 19 is sleeved on the bus bar 18 . The bus bar 9 is connected to the battery cell groups 15 on both sides across the connecting end plate, and the insulating layer 19 can play the role of insulating protection to avoid the problem of short circuit when the module is installed.

In order to better position the cell group 15 , the length of the connection end plate is set to match the length of the end of the cell group 15 , and both sides of the connection end plate are fixed to the side plate 16 . In this embodiment, both sides of the connecting end plate are welded together with the side plate 16 at the welding place 20 .

A third aspect of the present invention provides a battery pack, including the battery module described in the above solution. Since the battery pack adopts the above-mentioned battery module, it has all the advantages of the above-mentioned battery module. By integrating the design of the battery management unit inside the end plate, the installation problem of the battery management unit is solved, and the battery management unit is not installed after installation. It will occupy the external space, which can effectively save the internal space of the battery pack. At the same time, the above-mentioned integrated design improves the strength of the end plate itself and the rigidity of the battery module in the length direction, thereby improving the overall stability of the module and improving the safety of the battery pack.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. An end plate, characterized in that, the end plate includes casing (1) and sets up in battery management unit (2) inside casing (1), casing (1) is including detachably lock together first casing (3) and second casing (4), can internally confine the cavity that is used for holding battery management unit (2) after first casing (3) and second casing (4) lock.

2. End plate according to claim 1, characterized in that the top of the casing (1) is provided with a socket (5) for facilitating the plugging of the battery management unit (2) with an FPC board.

3. The end plate of claim 1, wherein the battery management unit (2) comprises a slave control plate provided with a first positioning hole (6), and the first housing (3) is internally provided with a second positioning hole (7) corresponding to the first positioning hole (6) for fixing the slave control plate.

4. The end plate of claim 3, wherein the first shell (3) and the second shell (4) are arranged to be fastened in the thickness direction of the end plate, a reinforcing rib (8) extending in the thickness direction of the end plate is arranged inside the first shell (3), a mounting seat (9) extending towards the second shell (4) is arranged on the reinforcing rib (8), the second positioning hole (7) is formed inside the mounting seat (9), and the reinforcing rib (8) and the slave control plate are arranged at intervals.

5. The end plate according to claim 4, characterized in that the first shell (3) is provided with partition plates (10) extending in the height direction of the end plate on both sides of the interior thereof, the reinforcing ribs (8) are provided between the partition plates (10) on both sides, and lightening holes (11) are provided between the partition plates (10) and both side ends of the first shell (3).

6. The end plate according to claim 5, wherein a first mounting hole (12) is formed in the partition plate (10), a second mounting hole (13) corresponding to the first mounting hole (12) is formed in the second shell (4) for a fastener to pass through, and a groove (14) for avoiding the fastener is formed around the second mounting hole (13) in part of the outer wall of the second shell (4).

7. A battery module, characterized in that the battery module comprises a plurality of electric core groups (15), a connecting end plate positioned between the ends of two adjacent electric core groups (15), a side plate (16) arranged at two sides of the electric core groups (15), and a positioning end plate (17) connected with the two ends of the side plate (16), wherein the connecting end plate is the end plate of any one of claims 1-6.

8. The battery module according to claim 7, wherein the tops of two adjacent electric core groups (15) are connected through a bus bar (18), and an insulating layer (19) is sleeved on the bus bar (18).

9. The battery module according to claim 7, wherein the length of the connecting end plate is configured to be matched with the length of the end of the electric core pack (15), and the two sides of the connecting end plate are fixed to the side plates (16).

10. A battery pack comprising the battery module according to any one of claims 7 to 9.

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