CN220306473U

CN220306473U - Sampling assembly, battery module and energy storage device

Info

Publication number: CN220306473U
Application number: CN202321942187.8U
Authority: CN
Inventors: 尹嘉惠
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2024-01-05
Anticipated expiration: 2033-07-21

Abstract

The utility model provides a sampling assembly, a battery module and an energy storage device. The sampling assembly comprises a busbar assembly and a circuit board; the busbar assembly comprises a busbar bracket arranged on the side surface of the battery pack and a plurality of busbars connected to the busbar bracket, each busbar is provided with a main board body connected with a single cell in the battery pack and a connecting board body connected with the main board body, and the connecting board body bends towards one side where the battery pack is positioned, extends and is positioned on the top surface of the battery pack; the circuit board is provided with a plurality of connecting sheets which are connected with a plurality of connecting plate bodies in a one-to-one correspondence manner. According to the sampling assembly, the bus bar with the L-shaped bending structure is adopted, and the pole column on the side face of the battery pack is connected and extends to the top face of the battery pack, so that the connection point of the circuit board and the bus bar is arranged on the top face of the battery pack, and the maintenance and the replacement of the sampling assembly in the battery module or the energy storage device can be facilitated.

Description

Sampling assembly, battery module and energy storage device

Technical Field

The utility model relates to the technical field of batteries, in particular to a sampling module. The utility model also relates to a battery module provided with the sampling assembly and an energy storage device provided with the battery module.

Background

In recent years, with the progress of technology and the development of economy, the performance of power batteries is continuously improved, and more novel power batteries are continuously developed. The blade battery is taken as a typical CTP (CELL TO PACK) scheme, so that the energy density of the power battery is greatly improved. In order to ensure safe operation of the battery system, the battery module generally uses a sampling assembly to collect information such as voltage and temperature of each single battery.

In the prior art, a pole is usually arranged on the side end face of the battery cell of the blade, and a circuit board of the sampling assembly and a busbar for connecting the circuit board and the pole are also arranged on the side end face where the pole is located nearby. Because the battery cell is usually directly fixed on the bottom surface in the battery module box body in an adhesive manner during production and assembly and is difficult to detach, and the gap between the side end surface of the battery cell and the battery module box body is smaller, so that the maintenance and replacement of the sampling assembly arranged on the side end surface of the battery cell are difficult.

Disclosure of Invention

In view of this, the present utility model aims to propose a sampling assembly for its maintenance and replacement.

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

a sampling assembly comprising a busbar assembly and a circuit board;

the busbar assembly comprises a busbar bracket arranged on the side face of the battery pack and a plurality of busbars connected to the busbar bracket, wherein each busbar is provided with a main board body electrically connected with a single cell in the battery pack and a connecting board body connected with the main board body, and the connecting board body is bent towards one side where the battery pack is located, extends and is positioned on the top face of the battery pack;

the circuit board is provided with a plurality of connecting pieces which are arranged at intervals along the length direction of the circuit board, and the connecting pieces are electrically connected with the connecting plate bodies in a one-to-one correspondence manner.

Further, the bus bar is provided with a connecting part which is connected with the bus bar support, the bus bar support is provided with a connecting column or a connecting piece, and the connecting column or the connecting piece is connected with the connecting part.

Further, the main board body is provided with two board bodies connected together, and the two board bodies are respectively used for being electrically connected with the pole posts on the side parts of the two adjacent electric cores in the battery pack.

Further, a groove is formed at the joint of the two plate bodies; and/or the number of the groups of groups,

the connecting plate body is connected with at least one plate body.

Further, the main board body is provided with a positioning hole for positioning the main board body on the single battery cell.

Further, the sampling assembly further comprises a temperature sensing sampling assembly positioned above the battery pack.

Further, the temperature sensing sampling assembly is provided with a temperature sensing module for collecting the temperature of the battery pack and an insert for connecting an external part;

the temperature sensing module is connected with the plug-in through a wire, and can be detachably connected with the wire.

Further, the temperature sensing module consists of a printed circuit board, temperature sensing, a square frame and sealant.

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

according to the sampling assembly, the bus bar with the L-shaped bending structure is adopted, so that the terminal posts on the side face of the battery pack are connected and extend to the top face of the battery pack, and the connection point of the circuit board and the bus bar is arranged on the top face of the battery pack. The device is convenient for maintenance and replacement of the sampling assembly in the battery module or the energy storage device.

In addition, through set up connecting portion on the busbar to be connected with the spliced pole or the connecting piece of locating on the busbar support, can be convenient for connect the location between busbar and the busbar support, and be favorable to improving joint strength.

In addition, set up two plate bodies that link together on the mainboard body through the busbar to, two plate bodies are connected with two adjacent electric core lateral part utmost point posts electricity respectively, can realize the electric connection of two adjacent electric cores like this. The junction of two plate bodies sets up the recess, when guaranteeing structural strength, has certain pliability, can absorb the tolerance, welding deformation when reducing earlier stage equipment and adaptation later stage in use's electric core expansion deformation. Through setting up the locating hole on the mainboard body, can be convenient for the location when busbar and monomer electricity core utmost point post welding.

Secondly, through setting up the temperature sense sampling subassembly that is located the group battery top, can detect the group battery temperature, be favorable to preventing that the battery from using in-process temperature is unusual, improve the reliability of group battery, locate the group battery top simultaneously and still be convenient for the maintenance of temperature sampling subassembly and change. Through set up the plug-in components that pass through the wire with temperature sensing module in the temperature sampling subassembly, make temperature sensing module be convenient for be connected with the external part to temperature sensing module adopts detachable mode to connect, is favorable to the maintenance of temperature sensing module to change.

Another object of the present utility model is to provide a battery module, on which the sampling assembly as described above is disposed.

Meanwhile, the utility model also provides an energy storage device, and the energy storage device is provided with the battery module.

The battery module and the energy storage device have the same beneficial effects as those of the sampling assembly in the prior art, and are not repeated herein.

Drawings

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

FIG. 1 is a schematic diagram of a sampling assembly according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic view illustrating a bus structure according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a bus bar bracket according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a circuit board according to an embodiment of the utility model;

FIG. 6 is a schematic diagram of a temperature sensing module according to an embodiment of the utility model;

reference numerals illustrate:

1. a busbar assembly; 11. a busbar support; 111. a connecting column; 12. a busbar; 121. a main board body; 1211. a plate body; 1212. positioning holes; 1213. a groove; 122. a connecting plate body; 123. a connection part; 1231. a connection hole;

2. a circuit board; 21. a connecting sheet;

3. a temperature sensing sampling component; 31. a temperature sensing module; 311. a printed circuit board; 312. a temperature sensation; 313. a square frame; 314. sealing glue; 32. an insert;

4. a battery pack; 5. a metal sheet.

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.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; 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 can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a sampling assembly, which is shown in fig. 1 to 6 as a whole, and includes a busbar assembly 1 and a circuit board 2.

The busbar assembly 1 includes a busbar bracket 11 disposed on a side surface of the battery pack 4, and a plurality of busbars 12 connected to the busbar bracket 11. Each busbar 12 has a main board body 121 electrically connected to the single cells in the battery pack 4, and a connecting board body 122 connected to the main board body 121, where the connecting board body 122 is bent and extended toward the side where the battery pack 4 is located, and is located on the top surface of the battery pack 4. The circuit board 2 has a plurality of connection pieces 21 arranged at intervals along its length direction, and the plurality of connection pieces 21 are electrically connected to the plurality of connection board bodies 122 in one-to-one correspondence.

As described above, the sampling assembly of this embodiment connects the terminal post on the side of the battery pack 4 to the top surface of the battery pack 4 by adopting the busbar 12 with the overall L-shaped bending structure, so that the connection point between the circuit board 2 and the busbar 12 is arranged on the top surface of the battery pack 4, and thus the maintenance and replacement of the sampling assembly in the battery module or the energy storage device can be facilitated.

Based on the above general description, it should be specifically noted that the positive electrode post and the negative electrode post of the single cell are separately disposed on opposite sides of the cell, that is, the electrode posts are located on the side of the battery pack 4 formed by the single cells. In particular, the bus bar 12 has an L-shaped bending structure, the lower portion of the bus bar 12 has a main board 121 located at the side of the battery pack 4, and the connecting board 122 at the upper portion of the bus bar 12 extends to the top surface of the battery pack 4.

At the same time, the main board 121 is connected to the terminal on the side of the battery pack 4, and the connecting board 122 is welded to the connecting piece 21 by a metal sheet 5, and the metal sheet 5 may be, for example, a nickel sheet, a copper sheet, or the like. By the arrangement, the circuit board 2 positioned on the top surface of the battery pack 4 can be connected with the pole positioned on the side surface of the battery pack 4, so that the circuit board 2 can be maintained and replaced above the battery pack 4 conveniently.

In detail, when the circuit board 2 is repaired and replaced, the metal sheet 5 is cut off above the battery pack 4 and a new circuit board 2 is soldered again. In addition, in the implementation, the circuit board 2 may be a PCBA (Printed Circuit Board Assembly) printed circuit board, and may also be a FPC (Flexible Printed Circuit) flexible circuit board with the advantages of thin thickness, light weight, flexible folding, etc. In this way, the circuit board 2 can convert the voltage signal collected by the bus bar 12 into an electrical signal and output to the outside.

As a preferred embodiment, as shown in fig. 1 to 4, in order to facilitate the mounting and fixing of the bus bar 12 on the bus bar bracket 11, the bus bar 12 is provided with a connection portion 123 for connecting itself to the bus bar bracket 11, and at the same time, the bus bar bracket 11 is provided with a connection post 111 or a connection member, and the connection post 111 or the connection member is connected to the connection portion 123.

In particular, as an exemplary structure, the connection portions 123 in the present embodiment are located at both ends of the main plate body 121 on the bus bar 12, and the connection portions 123 are provided with connection holes 1231. Correspondingly, the bus bar bracket 11 is provided with a connecting column 111. When the bus bar 12 is fixedly mounted, the connection post 111 can be inserted into the connection hole 1231, and the bus bar 12 is fixedly connected to the bus bar bracket 11 by welding or the like.

In detail, the main plate body 121 is provided at both upper and lower ends thereof with connection portions 123 and is provided with 2 and 1 connection holes 1231, respectively. It will be appreciated that the specific number and arrangement of the attachment holes 1231 can be adjusted according to actual needs, including but not limited to the number of exemplary rack structures described above. At this time, by penetrating the connection posts 111 provided on the bus bar bracket 11 in the connection holes 1231 of the bus bar 12, the fixation between the bus bar 12 and the bus bar bracket 11 can be facilitated, and the fixation strength can be advantageously improved.

In this embodiment, the connecting post 111 may be integrally formed on the busbar bracket 11, and may be further formed on the busbar bracket 11 by welding, screwing, or the like. In practice, the positions and the number of the connection posts 111 are set to correspond to the positions and the number of the connection holes 1231 on the bus bar 12 one by one. It is understood that the number of the connection posts 111 may be smaller than the number of the connection holes 1231, that is, it is also possible that part of the connection holes 1231 do not pass through the connection posts 111.

As a preferred embodiment, as shown in fig. 1 to 3, in order to achieve connection and conduction between two adjacent cell poles, in this embodiment, the main board body 121 has two board bodies 1211 connected together, and the two board bodies 1211 are respectively used for electrical connection with the poles of the side portions of the two adjacent cells in the battery pack 4. In practice, the two plates 1211 on the busbar 12 are integrally formed on the busbar 12, and the two plates 1211 may be connected by welding or the like.

In addition to the two plates 1211, as a preferred embodiment, a groove 1213 is further formed at the junction of the two plates 1211. By arranging the grooves 1213 at the joint of the two plate bodies 1211, the structure strength is ensured, and meanwhile, the electric core has certain flexibility, can absorb tolerance, reduce welding deformation in the early assembly process and adapt to the expansion deformation of the electric core in the later use process. At the same time, as a preferred embodiment, the connection plate 122 is connected to at least one of the plate 1211.

As a preferred embodiment, in order to facilitate the welding positioning of the busbar 12 and the single-cell battery post, the main board body 121 of this embodiment is further provided with a positioning hole 1212 for positioning the main board body 121 on the single-cell battery. In detail, as an exemplary structure, the positioning holes 1212 of the present embodiment are respectively provided on the two plate bodies 1211, and are located on the upper and lower sides of the plate body 1211 and the welding point of the pole. It should be noted that the positions and the number of the positioning holes 1212 may also be set according to the actual welding positioning requirements.

In this embodiment, as a preferred embodiment, referring to fig. 1 and 6, the sampling assembly further includes a temperature sensing sampling assembly 3 above the battery pack 4. At this time, through setting up the temperature sense sampling subassembly 3 that is located group battery 4 top, can realize group battery 4's temperature detection, be favorable to preventing that the battery from using in-process temperature is unusual, improve group battery 4's reliability. Meanwhile, the temperature sensing sampling assembly 3 is arranged above the battery pack 4, so that the temperature sensing sampling assembly 3 can be maintained and replaced conveniently.

As a preferred embodiment, referring to fig. 1, the temperature sensing sampling assembly 3 has a temperature sensing module 31 for sensing the temperature of the battery pack 4, and an insert 32 for external connection. The temperature sensing module 31 and the plug-in 32 are connected through a wire, and the temperature sensing module 31 can be detachably connected with the wire. So set up, the plug-in components 32 in the temperature sense sampling subassembly 3 can make the temperature sense module 31 be convenient for be connected with the external part, and simultaneously, the temperature sense module 31 adopts detachable mode to connect, is favorable to the maintenance of temperature sense module 31 to change.

In particular, the temperature sensing module 31 of the present embodiment adopts a conventional product capable of acquiring temperature, for example, a temperature sensor. The temperature sensing module 31 in the present embodiment may be disposed on the circuit board 2 in addition to the battery pack 4. The temperature sensing module 31 is connected to the lead wire by an existing connector product, so that the temperature sensing module 31 can be detachably connected.

Meanwhile, the temperature sensing sampling assembly 3 of the present embodiment may be integrated on the circuit board 2 in addition to being independently disposed. In detail, the plug-in unit 32 for connecting with external components in the temperature sensing sampling assembly 3 may be integrated with the plug-in unit for transmitting voltage signals on the circuit board 2. In addition, for temperature acquisition of the circuit board 2, the temperature sensing module 31 can be directly arranged on the circuit board 2; for temperature collection of the battery pack 4, the temperature sensing module 31 may be connected to the circuit board 2 by a wire harness. The arrangement is beneficial to improving the integration level of the sampling assembly.

As a preferred implementation form of the present embodiment, referring to fig. 6, the temperature sensing module 31 is composed of a printed circuit board 311, a temperature sensing 312, a rectangular frame 313, and a sealant 314. In practice, the printed circuit board 311 is provided with a rectangular frame 313 and a temperature sensor 312 disposed in the rectangular frame 313. The temperature sensor 312 may be a thermistor capable of accurately sensing temperature, and the temperature sensor 312 is encapsulated in the rectangular frame 313 by using the sealant 314.

In summary, in the sampling assembly of the embodiment, the bus bar 12 with the overall L-shaped bending structure is adopted to connect the terminal post on the side surface of the battery pack 4 and extend the terminal post to the top surface of the battery pack 4, so that the connection point between the circuit board 2 and the bus bar 12 is arranged on the top surface of the battery pack 4, and the sampling assembly is convenient to maintain and replace in the battery module or the energy storage device.

Example two

The embodiment relates to a battery module, and the battery module is provided with a sampling assembly in the first embodiment. The structure which is not described in the battery module can be referred to the existing structure.

The battery module of this embodiment can be convenient for maintain and change the sampling subassembly in the battery module through the sampling subassembly of application embodiment one, and is favorable to improving the maintainability of battery module.

Meanwhile, the embodiment also relates to an energy storage device, and the battery module is arranged on the energy storage device.

The energy storage device of the embodiment can also be convenient for maintenance and replacement of the sampling assembly by adopting the battery module, thereby being beneficial to improving the maintainability of the energy storage device.

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

1. A sampling assembly for sampling a battery pack, characterized in that:

the sampling assembly comprises a busbar assembly and a circuit board;

2. The sampling assembly of claim 1, wherein:

the bus bar is provided with a connecting part which is connected with the bus bar support, the bus bar support is provided with a connecting column or a connecting piece, and the connecting column or the connecting piece is connected with the connecting part.

3. The sampling assembly of claim 1, wherein:

the main board body is provided with two board bodies connected together, and the two board bodies are respectively used for being electrically connected with the pole posts on the side parts of the two adjacent electric cores in the battery pack.

4. A sampling assembly according to claim 3, wherein:

a groove is formed at the joint of the two plate bodies; and/or the number of the groups of groups,

the connecting plate body is connected with at least one plate body.

5. The sampling assembly of claim 1, wherein:

and the main board body is provided with a positioning hole for positioning the main board body on the single battery cell.

6. The sampling assembly of any one of claims 1-5, wherein the sampling assembly:

the sampling assembly further includes a temperature sensing sampling assembly positioned above the battery pack.

7. The sampling assembly of claim 6, wherein:

the temperature sensing sampling assembly is provided with a temperature sensing module for collecting the temperature of the battery pack and an insert for connecting an external part;

8. The sampling assembly of claim 7, wherein:

the temperature sensing module consists of a printed circuit board, a temperature sensing module, a square frame and sealant.

9. A battery module, characterized in that:

the battery module is provided with the sampling assembly as claimed in any one of claims 1 to 8.

10. An energy storage device, characterized in that:

the battery module of claim 9 is arranged in the energy storage device.