CN220652101U

CN220652101U - CCS sampling assembly and power battery system

Info

Publication number: CN220652101U
Application number: CN202322281735.3U
Authority: CN
Inventors: 刘斌; 黄雁; 杜野; 阿卜杜巴斯提·阿卜力孜
Original assignee: Shenzhen Hoverbird Electronic Technology Co ltd
Current assignee: Shenzhen Hoverbird Electronic Technology Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-03-22
Anticipated expiration: 2033-08-23

Abstract

The application relates to the technical field of power batteries, in particular to a CCS sampling assembly and a power battery system. In the CCS sampling assembly, the electric core connecting part passes through the through hole of the circuit board and is electrically connected with the first acquisition part on the circuit board, so that the arrangement of a plastic bracket can be avoided, the number of parts and assembly procedures of the CCS sampling assembly can be reduced, and the cost is reduced; the first acquisition parts and the temperature measuring components are respectively and electrically connected with the first elements in the battery signal management module through the circuit board to acquire voltage and temperature signals, so that additional wiring harnesses can be avoided, assembly procedures can be simplified, manufacturing difficulty is reduced, and production efficiency and qualification rate are improved; in addition, the temperature measuring assembly and the first acquisition assembly are respectively positioned on two opposite surfaces of the circuit board, and the surface where the temperature measuring assembly is positioned faces the battery, so that the temperature measuring assembly is convenient to be in direct heat conduction contact with the battery cell, the accuracy of data acquisition is improved, and the safety performance of the whole power battery system is improved.

Description

CCS sampling assembly and power battery system

Technical Field

The application relates to the technical field of power batteries, in particular to a CCS sampling assembly and a power battery system.

Background

The power battery system is used as a key power source of the new energy automobile, and the safety performance requirement is extremely high. In order to detect the working condition of the battery module in the power battery system, a CCS (Cells Contact System, integrated busbar) sampling assembly needs to be configured in the power battery system, and the CCS sampling assembly is used for collecting the voltage signal and the temperature signal of the battery cell in the battery module, and processing and outputting the voltage signal and the temperature signal through the battery information management module.

The traditional CCS sampling assembly is generally welded at the welding point of the bus plate of the battery module through the wire harness, the wire harness inside the CCS sampling assembly occupies a large space, is high in manual operation and manufacturing difficulty and cost, and is low in production efficiency and qualification rate of a power battery system and poor in safety performance.

Disclosure of Invention

The utility model provides a CCS sampling assembly and power battery system to solve power battery system manufacturing degree of difficulty, cost are higher, and production efficiency and qualification rate are lower, the relatively poor technical problem of security performance.

According to an aspect of the present application, there is provided in one embodiment a CCS sampling assembly, including:

the circuit board is provided with a plurality of through holes for the power supply connection parts to pass through, the circuit board is provided with a first surface which is used for facing away from the power supply core and a second surface which faces towards the power supply core, and the first surface is provided with a plurality of first acquisition parts which are used for being electrically connected with the corresponding power supply core connection parts;

the temperature measuring assembly is fixed on the second surface and is used for being in heat conduction contact with the battery cell;

the battery signal management module comprises a first element, wherein the first element is arranged on the circuit board, the first element is respectively and electrically connected with the first acquisition parts and the temperature measuring assembly through the circuit board, and the first element is used for realizing acquisition of voltage and temperature signals of the battery cell.

In an alternative embodiment, the plurality of first collecting parts are divided into at least two columns in a first direction, and each of the first collecting parts in each column is arranged at intervals in a second direction, and the first direction is perpendicular to the second direction;

the battery signal management module is positioned between two adjacent rows of the first acquisition parts in the first direction, and the battery signal management module is positioned in the middle of each row of the first acquisition parts in the second direction.

In an alternative embodiment, the first element is electrically connected to each of the first collecting parts through a first conductive line provided on the circuit board, and each of the first conductive lines is connected in series with a fuse.

In an alternative embodiment, the fuse is disposed proximate the first harvesting portion.

In an alternative embodiment, the first element has a collecting part and a processing part, the collecting part is electrically connected with the processing part, the collecting part is used for collecting the voltage and temperature signals, and the processing part is used for processing the collected voltage and temperature signals.

In an alternative embodiment, the battery signal management module further comprises a second element for electrically connecting with the total input and the total output of the power battery to collect the total input voltage signal and the total output voltage signal of the power battery, the second element having a protection circuit for protecting the power battery.

In an alternative embodiment, the battery signal management module further includes a communication element mounted on the circuit board, the communication element being electrically connected to the first element to receive and send out voltage and temperature information of the power core.

In an alternative embodiment, the battery signal management module further includes a second element for electrically connecting with the total input and the total output of the power battery, the second element further being electrically connected with the communication element to receive the user command signal transmitted through the communication element.

According to an aspect of the present application, there is provided in one embodiment a power battery system, including a plurality of battery packs and the CCS sampling assembly of any one of the above-mentioned claims, the battery packs include a plurality of electric cores and electric core connecting portions, the electric cores are in one-to-one correspondence with the electric core connecting portions and are electrically connected, and the electric core connecting portions pass through the corresponding through holes and are electrically connected with the corresponding first collecting portions.

According to the CCS sampling assembly and the power battery system, the through hole is formed in the circuit board, so that the electric core connecting part penetrates through the through hole and is electrically connected with the first collecting part on the circuit board, the plastic bracket is prevented from being arranged in the CCS sampling assembly, the number of parts of the CCS sampling assembly is reduced, the assembly procedure of the CCS sampling assembly and the power battery system is simplified, and the cost is reduced; the first acquisition parts and the temperature measuring components are respectively and electrically connected with the first elements in the battery signal management module through the circuit board to acquire voltage and temperature signals, so that additional wiring harnesses between the battery and the battery signal management module can be avoided, assembly procedures can be simplified, manufacturing difficulty can be reduced, and production efficiency and qualification rate can be improved; in addition, the temperature measuring assembly and the first acquisition assembly are respectively located on two opposite surfaces of the circuit board, and the surface where the temperature measuring assembly is located faces the battery, so that the temperature measuring assembly is convenient to directly conduct heat with the battery cell, accuracy of data acquisition is improved, and safety performance of the whole power battery system is improved.

Drawings

FIG. 1 is a schematic diagram of a power cell and CCS sampling assembly in one embodiment;

FIG. 2 is an exploded view of a power cell system according to one embodiment;

FIG. 3 is a schematic diagram of a first surface structure of a circuit board according to an embodiment;

fig. 4 is a schematic diagram of a second surface structure of a circuit board according to another embodiment.

In the figure: 1. a circuit board; 11. a through hole; 12. a first face; 13. a second face; 14. a first conductive line; 15. a second conductive line; 16. a first acquisition unit; 2. a fuse; 3. a temperature measuring assembly; 4. a battery signal management module; 41. a first element; 42. a communication element; 43. a second element; 5. a power battery; 51. a battery pack; 511. a battery cell; 512. and a cell connecting part.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operational steps involved in the embodiments may be sequentially exchanged or adjusted in a manner apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of describing certain embodiments and are not necessarily intended to imply a required composition and/or order.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

The application discloses CCS sampling assembly is applied to a power battery system and is used for achieving voltage signal collection of each electric core 511 in a power battery 5 and further used for achieving temperature signal collection of the whole power battery 5 or partial electric cores 511 of the whole power battery 5, so that monitoring of voltage and temperature signals of the whole power battery 5 is conveniently achieved, and safety performance of the whole power battery 5 is guaranteed.

The CCS sampling assembly in the application comprises a circuit board 1, a temperature measuring assembly 3 and a battery signal management module 4, wherein a plurality of through holes 11 through which power supply core connecting parts 512 penetrate are formed in the circuit board 1, the circuit board 1 is provided with a first surface 12 for facing away from a power supply core 511 and a second surface 13 facing the power supply core 511, and the first surface 12 is provided with a plurality of first collecting parts 16 for electrically connecting with the corresponding power supply core connecting parts 512; the temperature measuring component 3 is fixed on the second surface 13, and the temperature measuring component 3 is used for being in heat conduction contact with the battery cell 511; the battery signal management module 4 comprises a first element 41, the first element 41 is mounted on the circuit board 1, the first element 41 is respectively and electrically connected with each first acquisition part 16 and the temperature measuring component 3 through the circuit board 1, and the first element 41 is used for realizing acquisition of voltage and temperature signals.

Specifically, in some embodiments, referring to fig. 1 to 3, a power battery 5 adapted to a CCS sampling assembly includes two battery packs 51 disposed side by side, the battery packs 51 include a plurality of stacked battery cells 511, and an arrangement direction of the plurality of battery cells 511 is perpendicular to an arrangement direction of the battery packs 51; the two battery packs 51 may be connected in series or in parallel, and the plurality of battery cells 511 in the same battery pack 51 may also be connected in series or in parallel, or a series-parallel hybrid electric connection manner may also be adopted. The CCS sampling assembly is located at one side of the power battery 5, and is perpendicular to the arrangement direction of the power battery 5, the arrangement direction of the two battery packs 51, and the stacking direction of the plurality of battery cells 511 in the same battery pack 51.

The circuit board 1 is fixedly connected with the whole power battery 5. Each of the electric cells 511 has an electric cell connecting portion 512 disposed towards the direction of the circuit board 1, where the electric cell connecting portion 512 may be a sheet-shaped connecting structure, and the through hole 11 on the circuit board 1 is a long and narrow through hole for the sheet-shaped electric connecting portion to pass through. The battery cell connecting part 512 comprises a positive electrode connecting part and a negative electrode connecting part, a bonding pad is arranged on the first surface 12 of the circuit board 1 corresponding to each battery cell 511, and the positive electrode connecting part and the negative electrode connecting part of two adjacent and serially connected battery cells 511 in the same battery pack 51 are welded with the same bonding pad; specifically, the positive electrode connection portion and the negative electrode connection portion are bent after passing through the corresponding through holes 11, and the bent portions are welded with the bonding pads, so as to realize the electrical connection between the battery cell 511 and the circuit board 1 and the fixed connection between the circuit board 1 and the power battery 5.

The plurality of bonding pads on the circuit board 1 form the first collecting parts 16 on the circuit board 1 for electrically connecting with the corresponding battery core connecting parts 512, and each first collecting part 16 corresponds to each battery core 511, so as to facilitate the connection between the battery core connecting parts 512 and the corresponding first collecting parts 16. Two through holes 11 are provided between two adjacent first collecting parts 16 to allow the positive electrode connecting parts and the negative electrode connecting parts of two adjacent electric cores 511 to pass through. Thus, the through hole 11 is arranged on the circuit board 1 so that the power supply connecting part 512 passes through and is electrically connected with the first collecting part 16 on the first surface 12, so that the structure that the circuit board 1 is electrically connected and fixedly connected with the power battery 5 can be realized, the plastic bracket for realizing the position fixing of the circuit board 1 relative to the power battery 5 can be avoided from being arranged in the CCS sampling assembly, the number of parts and the assembly procedure of the whole CCS sampling assembly can be reduced, and the cost of the CCS sampling assembly can be reduced.

In some embodiments, the number of the temperature measuring assemblies 3 may be plural, for example, four, please refer to fig. 4, two temperature measuring assemblies 3 are disposed corresponding to each battery pack 51, and the two temperature measuring assemblies 3 are disposed at intervals in the arrangement direction of the plurality of battery cells 511 of the same battery pack 51. The temperature measuring component 3 is a temperature sensor to detect the temperature of the battery cell 511, that is, the temperature of the whole power battery 5; the temperature measuring component 3 can be directly welded on the circuit board 1 to realize the fixed connection with the circuit board 1, the temperature measuring component 3 can be in heat conduction contact with the battery cell 511 through heat conduction glue, or the temperature measuring component 3 can be directly attached to and contacted with the battery cell 511 after the battery cell connecting part 512 is welded with the first collecting part 16, so that the temperature measuring component 3 and the first collecting part 16 are oppositely arranged on the circuit board 1, the temperature measuring component 3 is positioned on one side of the circuit board 1 facing the battery, and the temperature measuring accuracy of the temperature measuring component 3 to the power battery 5 is improved, and the safety performance of the whole power battery 5 is improved.

In some embodiments, referring to fig. 1 to 3, the first element 41 in the battery signal management module 4 is an information acquisition module, which is fixed on the circuit board 1 by soldering, and the information acquisition module may be fixed on the first face 12 of the circuit board 1, and may also be fixed on the second face 13 of the circuit board 1; the information acquisition module is respectively and electrically connected with each first acquisition part 16 through the circuit board 1, a plurality of printed first conductive lines 14 are arranged on the first surface 12 of the circuit board 1, and the information acquisition module is electrically connected with each corresponding first acquisition part 16 through each first conductive line 14, so that the acquisition of voltage signals of each electric core 511 in the power battery 5 is realized; the information acquisition module is further electrically connected with each temperature measuring component 3 through the circuit board 1, a plurality of printed second conductive lines 15 are arranged on the second face 13 of the circuit board 1, and the information acquisition module is electrically connected with the corresponding temperature measuring components 3 through each second conductive line 15, so that the acquisition of temperature signals of the electric core 511 in the power battery 5 is realized.

Thus, each first collecting part 16 and each temperature measuring component 3 are electrically connected with the first element 41 through the circuit board 1, so that the arrangement of wiring harnesses in the CCS sampling component can be avoided, the assembly procedure of the CCS sampling component is simplified, the manufacturing difficulty is reduced, and the production efficiency and the qualification rate of the CCS sampling component are improved.

The plurality of first collecting parts 16 are divided into at least two rows in the first direction, and each row of first collecting parts 16 is arranged at intervals in the second direction, and the first direction is perpendicular to the second direction; the battery signal management module 4 is located between two adjacent rows of the first collecting portions 16 in the first direction, and the battery signal management module 4 is located at an intermediate position of each row of the first collecting portions 16 in the second direction. Specifically, in some embodiments, referring to fig. 1 to 3, the plurality of first collecting portions 16 may be divided into two rows in a first direction, the first direction is the same as the arrangement direction of the two battery packs 51, and the second direction is the same as the arrangement direction of the plurality of electric cells 511 in each battery pack 51, so that the plurality of first collecting portions 16 may form a row corresponding to each battery pack 51, and each first collecting portion 16 in each row corresponds to each electric cell 511 in the corresponding battery pack 51; the battery signal management module 4 is located between two adjacent columns of the first collecting parts 16 and in the middle of the first collecting parts 16 in each column in the second direction, so that the first collecting parts 16 are convenient to electrically connect with the first elements 41 in the battery signal management module 4, i.e. the arrangement of the first conductive wires 14 on the circuit board 1 is convenient.

In other embodiments, the plurality of first collecting portions 16 may further be arranged in a plurality of columns according to the number of battery groups 51 in the power battery 5, for example, three columns or four columns may be arranged, two or three corresponding battery signal management modules 4 may be arranged, and the plurality of battery signal management modules 4 are all arranged between two adjacent columns of first collecting portions 16, so as to facilitate the electrical connection between each first collecting portion 16 and the corresponding battery signal management module 4 and the arrangement of the plurality of first conductive wires 14 on the circuit board 1.

In some embodiments, referring to fig. 1 to 3, a fuse 2 is connected in series to each first conductive line 14 connecting the first element 41 and each first collecting portion 16, so as to protect each voltage collecting line, and help to prevent the voltage collecting lines from being shorted to generate potential safety hazards. Specifically, each fuse 2 may be fixed on the first surface 12 of the circuit board 1 by soldering, and connected in series in the corresponding first conductive circuit 14.

Further, the fuse 2 in each first conductive line 14 is disposed close to the first collecting portion 16, so that a short circuit between the portions of the first conductive lines 14 close to the first collecting portion 16 or a short circuit between two adjacent first collecting portions 16 can be avoided, and the short circuit current does not pass through the fuse 2, i.e. the voltage collecting lines are short-circuited and the fuse 2 is not active, so that the safety of the whole voltage collecting lines can be further ensured.

Of course, in other embodiments, the fuse 2 may not be provided, and a protection circuit may be provided at the first element 41, so that when the voltage signal of any one of the electric cells 511 is not collected, the protection circuit protects the whole voltage collection circuit, so as to avoid potential safety hazard.

In some embodiments, the first element 41 in the battery signal management module 4 may also be an information collecting and processing module, where the information collecting and processing module has a collecting portion and a processing portion, the collecting portion is electrically connected with the processing portion, the collecting portion is used for collecting voltage and temperature signals, and the processing portion is used for processing the collected voltage and temperature signals. Referring to fig. 2 and 3, the information collecting and processing module not only can collect the voltage signal and the temperature signal of each cell 511 through each first conductive line 14, but also can process the collected voltage signal and temperature signal, for example, can process the voltage signal and the temperature signal into digital signals respectively, so as to facilitate the transmission of the subsequent voltage signal and temperature signal in the form of data.

Further, the battery signal management module 4 further includes a communication element 42, the communication element 42 is mounted on the circuit board 1, and the communication element 42 is electrically connected with the first element 41 to receive and send out the voltage and temperature information of the electric core 511. Specifically, referring to fig. 2 and 3, the communication element 42 may be a wireless bluetooth communication element 42, which is fixed on the first surface 12 of the circuit board 1 by welding, and the communication element 42 is electrically connected with the first element 41 through a conductive circuit printed on the circuit board 1, so that the communication element 42 can receive data containing voltage information and temperature information processed by the first element 41, and transmit the data to an external device or a PC end, such as a vehicle controller, by wireless bluetooth communication, so as to monitor the voltage and temperature of each electric core 511 in the power battery 5.

Of course, in other embodiments, to save cost, the communication element 42 may be a wired communication element, where the communication element 42 is connected to a wire, and the communication element 42 transmits data containing voltage information and temperature information to an external device or a PC end, such as a vehicle controller, through the wire.

In some embodiments, the battery signal management module 4 further includes a second element 43, where the second element 43 is configured to be electrically connected to the total input terminal and the total output terminal of the power battery 5 to collect the total input voltage signal and the total output voltage signal of the power battery 5, and the second element 43 has a protection circuit for protecting the power battery 5.

Specifically, referring to fig. 2 and 3, the second element 43 may be a battery protection module, one of the plurality of first collecting portions 16 of the circuit board 1 is electrically connected to the cell connection portion 512 closest to the total input end of the power battery 5 to electrically connect to the total input end of the power battery 5, the other is electrically connected to the cell connection portion 512 closest to the total output end of the power battery 5 to electrically connect to the total output end of the power battery 5, and the second element 43 is electrically connected to the first element 41 through a conductive line printed on the circuit board 1, so that the second element 43 is electrically connected to the total input end and the total output end of the power battery 5 through the first element 41 and the two first conductive lines 14, respectively, and the second element 43 may receive the total input voltage signal and the total output voltage signal of the power battery 5 collected and sent by the first element 41 to monitor the total input end and the total output voltage of the power battery 5.

The second element 43 has a protection circuit for protecting the power battery 5, which can emit an alarm signal when the voltage of the total input or the total output of the power battery 5 is out of a preset range, such as when the power battery 5 is overcharged or overdischarged.

Further, in some embodiments, the second element 43 is further electrically connected to the communication element 42, and can send an alarm signal to the communication element 42, and the alarm signal is forwarded to the PC end or an external device, such as a vehicle controller, by the communication element 42.

In other embodiments, the second element 43 may also receive user command signals communicated by the communication element 42. If the driver can input a preset command, such as a voltage command, into the vehicle controller, the communication element 42 receives a command signal containing voltage information sent by the vehicle controller, and transmits the command signal to the second element 43, and the second element 43 detects a total input voltage signal or a total output voltage signal of the power battery 5 according to the voltage information in the command.

In other embodiments, the second element 43 may be omitted, and the voltage signal of each cell 511 is collected only by the first element 41, so as to realize voltage monitoring of the whole power battery 5.

The application also discloses a power battery system, which includes a plurality of battery packs 51 and CCS sampling components in any of the above embodiments, for example, may include two battery packs 51, please refer to fig. 1 and 2, each battery pack 51 includes a plurality of electric cores 511 and electric core connection portions 512, the electric cores 511 are in one-to-one correspondence with the electric core connection portions 512 and are electrically connected, and the electric core connection portions 512 pass through holes 11 provided on the circuit board 1 and are electrically connected with corresponding first collecting portions 16 on the circuit board 1.

Further, the cell connection portion 512 may be electrically connected to the tab of the corresponding cell 511, please refer to fig. 1 and 2, the cell connection portion 512 is a bus plate, the bus plate may be a copper bar or an aluminum bar, one end of the bus plate is locally plated, and the plated end of the bus plate is connected to the first collecting portion 16 on the circuit board 1 by reflow soldering.

Of course, in other embodiments, the cell connection portion 512 may also be a tab of the cell 511, where the tab has a first end connected to the cell 511 and a second end for connecting to the first collecting portion 16, and the second end is welded to the first collecting portion 16 after being electroplated.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims

1. A CCS sampling assembly, comprising:

2. The CCS sampling assembly as claimed in claim 1, wherein a plurality of said first collection portions are divided into at least two columns in a first direction, each of said first collection portions in each column being arranged at intervals in a second direction, said first direction being perpendicular to said second direction;

3. The CCS sampling assembly as claimed in claim 1 or claim 2, wherein said first element is electrically connected to each of said first collection portions by a first conductive trace provided on said circuit board, each of said first conductive traces having a fuse connected in series.

4. The CCS sampling assembly as claimed in claim 3 wherein said fuse is disposed adjacent said first harvesting portion.

5. The CCS sampling assembly as claimed in claim 1 or 2, wherein said first element has a collection portion and a processing portion, said collection portion being electrically connected to said processing portion, said collection portion being configured to enable collection of said voltage and temperature signals, said processing portion being configured to process said collected voltage and temperature signals.

6. The CCS sampling assembly as claimed in claim 1 or 2, wherein said battery signal management module further includes a second element for electrically connecting with a total input and a total output of the power battery to collect a total input voltage signal and a total output voltage signal of the power battery, said second element having a protection circuit for protecting the power battery.

7. The CCS sampling assembly as claimed in claim 1 or 2, wherein said battery signal management module further includes a communication element mounted on said circuit board, said communication element being electrically connected to said first element to receive and send out voltage and temperature information of the electrical core.

8. The CCS sampling assembly as claimed in claim 7 wherein said battery signal management module further includes a second element for electrical connection with a total input and a total output of the power battery, said second element further being electrically connected with said communication element to receive user command signals communicated through said communication element.

9. A power battery system comprising a plurality of battery packs and the CCS sampling assembly of any one of claims 1 to 8, the battery packs comprising a plurality of cells and cell connection portions, the cells being in one-to-one correspondence with and electrically connected to the cell connection portions, the cell connection portions passing through the corresponding through holes and being electrically connected to the corresponding first acquisition portions.

10. The power cell system of claim 9, wherein the cell connection is a bus plate connected to the corresponding cell through a tab of the cell.