CN218677493U - Power battery system - Google Patents
Power battery system Download PDFInfo
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- CN218677493U CN218677493U CN202223152498.2U CN202223152498U CN218677493U CN 218677493 U CN218677493 U CN 218677493U CN 202223152498 U CN202223152498 U CN 202223152498U CN 218677493 U CN218677493 U CN 218677493U
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- circuit board
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- battery
- temperature sampling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a power battery system, includes: the battery comprises a battery cell pole piece, a flexible circuit board, a voltage and temperature sampling circuit board and battery packs; the cell pole post pieces are connected with the cell pole posts so as to realize series and/or parallel connection among the grouped cells; the nickel sheet end of the flexible circuit board is connected with the battery cell pole terminal plate, and the terminal of the flexible circuit board is connected with the voltage and temperature sampling circuit board; the voltage and temperature sampling circuit board is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board comprises a communication connector to realize communication with the battery management unit. Thereby with electric core utmost point post piece, flexible circuit board, voltage and temperature sampling circuit board integration, reduce system complexity and cost, improve the convenience of line assembly is produced to the battery, save the operating space that the connector pegged graft, effectively promote system integration efficiency.
Description
Technical Field
The application relates to the technical field of power batteries, in particular to a power battery system.
Background
With the increasing prominence of global energy crisis and environmental pollution problems, national policies support the great force in the field of new energy, and pure electric vehicles and hybrid electric vehicles taking power batteries as all or main energy carriers rapidly rush into the market. Safety, high integration efficiency and low cost have become the research hotspots in the application field of power battery systems.
Traditional power battery system, in group battery high-low pressure sampling field, mainly with battery core utmost point post piece + components of a whole that can function independently FPC flexible circuit board + configuration electric core voltage and temperature sampling controller in groups, and components of a whole that can function independently FPC flexible circuit board takes public female end connector respectively with electric core voltage and temperature sampling controller, pair the integrated form that realizes the sampling, this kind of scheme integrated efficiency is lower, the cost is higher, consequently, how to improve power battery system's integrated efficiency, and reduce cost is the technical problem that needs to solve in the field.
SUMMERY OF THE UTILITY MODEL
In view of the above, this summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
An object of the application is to provide a power battery system, can improve power battery system's integrated efficiency, reduce cost.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a power battery system, including: the battery comprises a battery cell pole piece, a flexible circuit board, a voltage and temperature sampling circuit board and battery packs;
the cell pole post pieces are connected with the cell pole posts so as to realize series and/or parallel connection among the grouped cells;
the nickel sheet end of the flexible circuit board is connected with the battery cell pole piece, and the terminal of the flexible circuit board is connected with the voltage and temperature sampling circuit board;
the voltage and temperature sampling circuit board is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board comprises a communication connector to realize communication with the battery management unit.
In one possible implementation manner, the method further includes: a communication harness;
the communication connector is communicated with the battery management unit through the communication wire harness.
In one possible implementation manner, the method further includes: a dust cover and a fixing bolt;
the dustproof cover is positioned on one side, far away from the battery pack, of the voltage and temperature sampling circuit board and covers the voltage and temperature sampling circuit board so as to realize electrical isolation and dust prevention;
the dustproof cover is connected with the battery pack through the fixing bolt.
In one possible implementation, the cell post segment is connected to the cell post by laser welding.
In a possible implementation manner, the material of the cell terminal post strap includes an aluminum sheet or a copper sheet.
In a possible implementation manner, the connection manner of the nickel sheet end of the flexible circuit board and the cell pole piece is welding or bonding.
In a possible implementation manner, the connection manner of the terminal of the flexible circuit board and the voltage and temperature sampling circuit board includes welding or pressing.
In one possible implementation, the communication harness is a retractable length harness.
In a possible implementation manner, the battery packs are connected in series, and the voltage and temperature sampling circuit boards are communicated with the battery management unit in series.
In one possible implementation manner, the method further includes: the voltage and temperature sampling circuit board, and, the insulating pad between the group battery.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a power battery system, includes: the battery comprises a battery cell pole piece, a flexible circuit board, a voltage and temperature sampling circuit board and battery packs; the cell pole post pieces are connected with the cell pole posts so as to realize series and/or parallel connection among the grouped cells; the nickel sheet end of the flexible circuit board is connected with the battery cell pole terminal plate, and the terminal of the flexible circuit board is connected with the voltage and temperature sampling circuit board; the voltage and temperature sampling circuit board is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board comprises a communication connector to realize communication with the battery management unit. Thereby with electric core utmost point post piece, flexible circuit board, voltage and temperature sampling circuit board integration, reduce system complexity and cost, improve the convenience of line assembly is produced to the battery, save the operating space that the connector pegged graft, effectively promote system integration efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It should be understood that the drawings are schematic and that elements and features are not necessarily drawn to scale.
FIG. 1 illustrates a schematic diagram of a conventional power cell system;
FIG. 2 is a schematic diagram illustrating a specific structure of a power battery system provided by an embodiment of the present application;
FIG. 3 shows a schematic diagram of a power battery system provided by an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
As described in the background art, with the global energy crisis and the environmental pollution becoming more and more prominent, national policies support the new energy field, and pure electric vehicles and hybrid electric vehicles using power batteries as all or main energy carriers thereof are rapidly coming into the market. Safety, high integration efficiency and low cost have become the research hotspots in the application field of power battery systems.
The integration efficiency of a traditional power battery system, particularly a high-low voltage sampling system of the traditional power battery system, is low, and the cost is high, so that how to improve the integration efficiency of the power battery system and reduce the cost is a technical problem to be solved in the field.
Specifically, in the field of low-voltage sampling (cell voltage and temperature sampling) of a battery pack, cell voltage and temperature data are monitored in the most traditional mode of 'flying leads' of the anode and the cathode of a cell; the wiring harness is integrated to an FPC (Flexible Printed Circuit), one end of the wiring harness is connected with a pole of an electric core to be monitored through a nickel sheet, the other end of the wiring harness is connected with a CMU (Cell Monitor Unit) male and female end connector through an integrated multi-terminal connector, and voltage and temperature collection of multiple electric cores after being grouped is achieved (as shown in figure 1, the wiring harness is a schematic diagram of a traditional power battery system).
From a flying wire scheme to an FPC (flexible printed circuit) line concentration scheme, the original countless and disordered wire harnesses of the cell voltage and temperature sampling lines are changed into a single FPC, and the arrangement space of the sampling lines and the manufacturing convenience are greatly improved.
However, the above-mentioned FPC end terminal and connector plastic shell's crimping, CCS (Cell Connection System, module electrical core Unit Connection System) and CMU (Cell Monitor Unit, cell monitoring Unit, monitoring voltage temperature, etc.) connector male and female end repeated plugging easily have the problems of terminal deformation, needle withdrawal, etc., and the plugging of FPC and CMU connector requires sufficient operating space, and is not friendly enough to the battery System arrangement and integration efficiency.
The integration efficiency of the traditional power battery system is low, and the cost is high, so how to improve the integration efficiency of the power battery system and reduce the cost is a technical problem to be solved in the field.
In order to solve the above technical problem, an embodiment of the present application provides a power battery system, including: the battery comprises a battery cell pole piece, a flexible circuit board, a voltage and temperature sampling circuit board and battery packs; the cell pole post pieces are connected with the cell pole posts so as to realize series and/or parallel connection among the grouped cells; the nickel sheet end of the flexible circuit board is connected with the battery cell pole terminal plate, and the terminal of the flexible circuit board is connected with the voltage and temperature sampling circuit board; the voltage and temperature sampling circuit board is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board comprises a communication connector to realize communication with the battery management unit. Thereby with electric core utmost point post piece, flexible circuit board, voltage and temperature sampling circuit board integration, reduce system complexity and cost, improve the convenience of line assembly is produced to the battery, save the operating space that the connector pegged graft, effectively promote system integration efficiency.
Referring to fig. 2, a schematic structural diagram of a power battery system provided in an embodiment of the present application includes: the battery comprises a battery post bus sheet 1, a flexible circuit board 2, a voltage and temperature sampling circuit board 3 and various battery packs (not shown in the figure).
The cell pole post pieces 1 are connected with the cell pole posts to realize series connection and/or parallel connection among the grouped cells;
the nickel sheet end of the flexible circuit board 2 is connected with the battery cell pole piece 1, and the terminal of the flexible circuit board 2 is connected with the voltage and temperature sampling circuit board 3.
The voltage and temperature sampling circuit board 3 is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board 3 includes a communication connector to enable communication with the battery management unit.
Specifically, in the embodiment of the present application, the cell post tab 1 is connected to the cell post by laser welding. The material of the battery cell pole post pieces comprises aluminum sheets or copper sheets so as to realize series-parallel connection among the grouped battery cells.
The connection mode of the nickel sheet end of the flexible circuit board 2 and the cell pole post piece 1 includes welding or bonding. The connection mode of the terminal of the flexible circuit board 2 and the voltage and temperature sampling circuit board 3 includes welding or pressing. The flexible printed circuit board 2 is a highly reliable and excellent flexible printed circuit board made of a polyimide or polyester film as a base material. The flexible printed circuit board or FPC for short has the characteristics of high wiring density, light weight and thin thickness.
The voltage and temperature sampling circuit board 3 provided by the embodiment of the application has a voltage and temperature sampling function, a communication low-voltage connector is arranged at a board end, a communication function is provided between the board end and a BMU (Battery Management Unit), and data interaction with the BMU can be realized.
Therefore, a CCS assembly in the traditional sense is integrated with the CMU module, the number of sub-parts is reduced, the integration efficiency of the subsystem is improved, the soft and hard combination of the FPC and the CMU PCB (Printed Circuit Board) is further realized, the installation space of the CMU in the scheme of the end plate of the battery pack is saved, and the integration efficiency of the system level of the battery is higher. One battery pack can save at least 2 pairs of low-voltage connectors, and cost reduction can be effectively realized.
In one possible implementation manner, the battery power system provided in the embodiment of the present application further includes: a communication harness 4; the communication connector is connected with the battery management unit through a communication wire harness 4.
In the embodiment of the application, the low-voltage communication wire harness 4 is provided with connectors at two ends which are matched with the ends of the voltage and temperature sampling circuit board 3; the low-voltage communication wiring harness 4 can arrange the interval and walk line demand adjustment length adaptation according to the group battery, and the communication wiring harness 4 can be length-adjustable's pencil promptly to arrange the interval and walk the line demand in time to adjust according to the group battery, avoid the emergence of occupation space or the insufficient condition of line length.
In a possible implementation mode, voltage and temperature signal acquisition of a single battery pack can be completed through the voltage and temperature sampling circuit board 3, and communication with the BMU is performed between different battery packs in a serial mode through the low-voltage communication wire harness 4. Namely, different battery packs are connected in series, and different voltage and temperature sampling circuit boards 3 are communicated with the battery management unit in a serial mode.
In a possible implementation manner, the battery power system provided by the embodiment of the present application may further include a dust cover 5 and a fixing bolt 6; the dustproof cover 5 is positioned on one side, far away from the battery pack, of the voltage and temperature sampling circuit board 3 and covers the voltage and temperature sampling circuit board 3 so as to realize electrical isolation and dust prevention. The dust cover 5 is connected with the battery pack through a fixing bolt 6.
In this application embodiment promptly, voltage and temperature sampling circuit board 3 passes through the bolt fastening at the group battery top, and voltage and temperature sampling circuit board 3 is through insulating cushion realization insulation in group battery direction of height, and voltage and temperature sampling circuit board 3 upper portion is through shield 5 realization electrical isolation and dustproof, is connected or is riveted through fixing bolt 6 between shield 5 and the group battery.
Referring to fig. 3, it can be seen that, in the integration scheme, the number of FPC terminals, voltage and temperature sampling circuit board end connectors is reduced, CCS and the voltage and temperature sampling circuit board are integrated, the complexity and cost of the system are reduced, the convenience of battery production line assembly is improved, the operation space for plugging connectors is saved, and the system integration efficiency is effectively improved.
The embodiment of the application provides a power battery system, includes: the battery comprises a battery cell pole piece, a flexible circuit board, a voltage and temperature sampling circuit board and battery packs; the cell pole post pieces are connected with the cell pole posts so as to realize series and/or parallel connection among the grouped cells; the nickel sheet end of the flexible circuit board is connected with the battery cell pole terminal plate, and the terminal of the flexible circuit board is connected with the voltage and temperature sampling circuit board; the voltage and temperature sampling circuit board is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board comprises a communication connector to realize communication with the battery management unit. Thereby with electric core utmost point post piece, flexible circuit board, voltage and temperature sampling circuit board integration, reduce system complexity and cost, improve the convenience of line assembly is produced to the battery, save the operating space that the connector pegged graft, effectively promote system integration efficiency.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The foregoing is merely a preferred embodiment of the present application and, although the present application discloses the foregoing preferred embodiments, the present application is not limited thereto. Those skilled in the art can make numerous possible variations and modifications to the disclosed solution, or modify it to equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.
Claims (10)
1. A power battery system, comprising: the battery comprises a battery cell pole piece, a flexible circuit board, a voltage and temperature sampling circuit board and battery packs;
the cell pole post pieces are connected with the cell pole posts so as to realize series and/or parallel connection among the grouped cells;
the nickel sheet end of the flexible circuit board is connected with the battery cell pole piece, and the terminal of the flexible circuit board is connected with the voltage and temperature sampling circuit board;
the voltage and temperature sampling circuit board is used for sampling the voltage and temperature of each battery pack; the voltage and temperature sampling circuit board comprises a communication connector to realize communication with the battery management unit.
2. The system of claim 1, further comprising: a communication harness;
the communication connector is communicated with the battery management unit through the communication wire harness.
3. The system of claim 1, further comprising: a dust cover and a fixing bolt;
the dustproof cover is positioned on one side, far away from the battery pack, of the voltage and temperature sampling circuit board and covers the voltage and temperature sampling circuit board so as to realize electrical isolation and dust prevention;
the dustproof cover is connected with the battery pack through the fixing bolt.
4. The system of claim 1, wherein the cell post tab is coupled to the cell post by laser welding.
5. The system of claim 1, wherein the material of the cell post tab comprises an aluminum or copper sheet.
6. The system of claim 1, wherein the connection of the nickel tab end of the flexible circuit board to the cell post tab comprises soldering or bonding.
7. The system of claim 1, wherein the terminals of the flexible circuit board are connected to the voltage and temperature sampling circuit board by soldering or pressing.
8. The system of claim 2, wherein the communication harness is a retractable length harness.
9. The system of claim 2, wherein the battery packs are connected in series, and wherein the voltage and temperature sampling boards communicate with the battery management unit in series.
10. The system of claim 1, further comprising: the voltage and temperature sampling circuit board, and, the insulating pad between the group battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223152498.2U CN218677493U (en) | 2022-11-25 | 2022-11-25 | Power battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223152498.2U CN218677493U (en) | 2022-11-25 | 2022-11-25 | Power battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218677493U true CN218677493U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223152498.2U Active CN218677493U (en) | 2022-11-25 | 2022-11-25 | Power battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218677493U (en) |
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2022
- 2022-11-25 CN CN202223152498.2U patent/CN218677493U/en active Active
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