Integrated busbar, battery cell module and energy storage battery pack

Abstract

The utility model provides an integrated busbar, a cell module and an energy storage battery pack, the integrated busbar comprises aluminum bars, a flexible circuit board and a blister tray, a plurality of aluminum bars are arranged around the edge of the flexible circuit board, and the aluminum bars are arranged on the blister tray and connected with the blister tray; the flexible circuit board is provided with a first printed circuit, the first end of the first printed circuit is provided with a plurality of branches, one end of the flexible circuit board is provided with a plurality of connector pads which are arranged side by side, and the plurality of branches are connected with the inner ends of the plurality of connector pads. According to the utility model, a printed circuit is utilized to enter different functional channels of a chip at the same point, so that the problems of weak insulation, poor contact, low processing efficiency, easiness in breaking and the like at the parallel punching position caused by the fact that a plurality of wires are arranged at the outer end of a connector to one wire in the prior art are solved; therefore, the wiring is simplified, and the reliability, the processing efficiency and the space utilization rate of the circuit are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an integrated busbar, cell module and energy storage battery pack. Background Technology

[0002] The comprehensive development of new energy technologies is receiving increasing attention. In the field of electrochemical energy storage, the battery application technology of containerized energy storage battery compartments is a key technology. The energy storage battery compartment houses the battery pack, and the production, testing, commissioning, and operation of the battery pack require high accuracy in real-time data acquisition of the cell status. Therefore, how to accurately collect actual cell operating data to ensure the safe use and management of the battery is an important technology that the entire new energy industry needs to pay attention to and solve.

[0003] Currently, the main methods for cell series connection and data acquisition within battery packs in the industry are aluminum busbars + acquisition harnesses and integrated busbars (Cells Connection System, hereinafter referred to as CCS). The former requires the aluminum busbars to be positioned according to a fixture and then soldered onto the assembled cell modules during battery pack production, and then the acquisition harnesses are used to connect to the aluminum busbars. The latter is an integrated component that eliminates the need for all aluminum busbar positioning fixtures and the action of placing the aluminum busbars during production. The acquisition harness can be in the form of an FPC (Flexible Printed Circuit). FPCs require multiple lines to connect to the same acquisition point. The existing method is to use a single line at the acquisition point to acquire data to a connector, and then use a converter harness at the connector's external end to split the data into multiple lines entering the chip channel.

[0004] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems: by using a one-to-many method to split the same point acquisition line into multiple channels of the chip on the adapter bundle at the outer end of the connector, multiple wires will be connected to one wire, which can easily lead to problems such as weak insulation, poor contact, low processing efficiency, and easy breakage. Utility Model Content

[0005] This utility model aims to solve, at least to a certain extent, one of the technical problems in the related art.

[0006] Therefore, the purpose of this utility model is to propose an integrated busbar, cell module and energy storage battery pack.

[0007] To achieve the above objectives, in a first aspect, this utility model proposes an integrated busbar, including an aluminum busbar, a flexible circuit board, and a blister tray, wherein a plurality of the aluminum busbars are arranged around the edge of the flexible circuit board, and the aluminum busbars are disposed on the blister tray and connected to the blister tray.

[0008] The flexible circuit board has a first printed line, the first end of the first printed line has multiple branches, and one end of the flexible circuit board has multiple connector pads arranged side by side, with the multiple branches connected to the inner ends of the multiple connector pads.

[0009] According to the integrated busbar of this utility model, by having multiple branches at the first end of the first printed line on the flexible circuit board, and the multiple branches being connected to the inner ends of multiple connector pads, it is possible to realize that the same point can be divided into multiple channels for different functions of the chip by using the printed line. This avoids the problems of multiple wires being bundled into one wire at the outer end of the connector in the prior art, which leads to weak insulation, poor contact, low processing efficiency, and easy breakage at the junction. This simplifies the wiring, improves the reliability of the line, processing efficiency, and space utilization.

[0010] According to one embodiment of the present invention, the flexible circuit board is provided with a second printed line, the second printed line passing through the outside of the connector pad and connected to the outer end of the connector pad.

[0011] According to one embodiment of the present invention, the flexible circuit board has multiple temperature sensor pads along its edge, and multiple third printed circuits are provided on the flexible circuit board. The third printed circuits enter from both sides of the temperature sensor pads and are connected to the temperature sensor pads.

[0012] Secondly, this utility model proposes a battery cell module, including multiple battery cell columns arranged side by side. The battery cell column includes the integrated busbar provided in the first aspect above and M battery cells arranged in the same direction. The integrated busbar is disposed on the battery cells, and M is a positive integer.

[0013] According to one embodiment of the present invention, a series bus is also included, which connects multiple battery cell arrays in series.

[0014] Thirdly, this utility model proposes an energy storage battery pack, including the cell module, adapter harness, and battery management unit integrated module provided in the second aspect. The battery management unit integrated module has N BMU interfaces, and the adapter harness has P first connectors and Q second connectors. The first connectors are connected to the cell module, and the second connectors are connected to the BMU interfaces, where P and Q are both positive integers, and P is greater than Q.

[0015] According to one embodiment of the present invention, it further includes a liquid-cooled lower housing and a housing cover, the battery cell module is disposed on the liquid-cooled lower housing, the housing cover is detachably connected to the liquid-cooled lower housing, and the battery management unit integrated module is disposed on the front wall of the housing cover.

[0016] According to one embodiment of the present invention, it further includes a plurality of lifting lugs and fasteners, wherein the fasteners pass sequentially through the lifting lugs and the cover and are connected to the liquid-cooled lower housing.

[0017] According to one embodiment of the present invention, it further includes a panel integration module, which is disposed on the front wall of the box cover.

[0018] According to one embodiment of the present invention, the top and side surfaces of the box cover are provided with strip-shaped recesses.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0021] Figure 1 This is a schematic diagram of the integrated busbar structure proposed in one embodiment of the present invention.

[0022] Figure 2 This is an exploded structural diagram of the integrated busbar proposed in one embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of a flexible circuit board with integrated busbars according to an embodiment of the present invention.

[0024] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0025] Figure 5 yes Figure 3 A magnified view of a portion of point B in the middle.

[0026] Figure 6 This is a schematic diagram of the structure of an energy storage battery pack according to an embodiment of the present invention.

[0027] Figure 7 This is an exploded structural diagram of an energy storage battery pack according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the cell array of an energy storage battery pack according to an embodiment of the present invention.

[0029] Figure 9 This is an exploded structural diagram of a battery cell array according to an embodiment of the present invention.

[0030] Figure 10 This is an electrical connection schematic diagram of an embodiment of the present invention relating to an energy storage battery pack.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Liquid-cooled lower enclosure, 2-Panel integrated module, 3-Outer cover, 4-Battery management unit integrated module, 5-Case cover, 6-Lifting lug, 7-Series busbar, 8-Cell module, 41-BMU interface, 80-Cell row, 81-Integrated busbar, 82-Cell, 83-Adapter harness, 811-Aluminum busbar, 812-Flexible circuit board, 813-Blaster, 814-Nickel sheet, 815-Connector pad, 816-First printed circuit board, 817-Second printed circuit board, 818-Temperature sensor pad, 819-Third printed circuit board. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0034] The following is for reference. Figures 1 to 10 This describes an integrated busbar according to an embodiment of the present invention.

[0035] Combination Figures 1 to 10 As shown, the integrated busbar 81 of this utility model embodiment includes an aluminum busbar 811, a flexible circuit board 812, and a blister tray 813. A plurality of aluminum busbars 811 are arranged around the edge of the flexible circuit board 812, and the aluminum busbars 811 are disposed on the blister tray 813 and connected to the blister tray 813.

[0036] The shape of the flexible circuit board 812 is set according to actual needs and is not specifically limited. For example, the flexible circuit board 812 is generally U-shaped or strip-shaped. The aluminum bar 811 acts as a conductor to transfer current from one battery cell 82 to another, realizing the series and / or parallel connection of all battery cells 82 in the battery cell module 8. The number of aluminum bars 811 is set according to the actual number of battery cells 82. The flexible circuit board 812 is used to monitor the status of each battery cell, such as voltage and temperature. The blister tray 813 is made of insulating material and is used to hold the position of the battery cells and enhance the strength of the overall battery cell structure. The aluminum bar 811 and the flexible circuit board 812 can be soldered together using nickel sheets 814.

[0037] When the flexible circuit board 812 has an overall U-shaped design, it facilitates material layout and die-cutting, improves raw material utilization, reduces waste, and further optimizes costs. The flexible circuit board 812 has a first printed circuit 816, with multiple branches at its first end. Multiple connector pads 815 are arranged side-by-side on the U-shaped closed end of the flexible circuit board 812, and the branches connect to the inner ends of the connector pads 815. Connectors are soldered onto the connector pads 815. The ends of the flexible circuit board 812 connect to various aluminum batteries to collect voltage and temperature data from the battery cells. The first end converges at the connector and connects to the battery management unit via a junction box to upload battery cell data. The inner end refers to the end closest to the U-shaped opening of the flexible circuit board 812. The number of branches is set according to actual needs and is not specifically limited. For example, as shown... Figure 4 As shown, there are 3 branches. The line splits into three inside the connector pad and enters the connector, so that the acquisition adapter cable bundle can be connected one-to-one from the connector to the BMU interface 41, avoiding the one-to-many wiring process.

[0038] According to the integrated busbar of this utility model embodiment, by having multiple branches at the first end of the first printed line on the flexible circuit board, and the multiple branches being connected to the inner ends of multiple connector pads, it is possible to realize that the same point can be divided into multiple channels for different functions of the chip by the printed line. This avoids the problems of multiple wires being bundled into one wire at the outer end of the connector in the prior art, which leads to weak insulation, poor contact, low processing efficiency, and easy breakage at the junction. This simplifies the wiring, improves the reliability of the line, processing efficiency, and space utilization.

[0039] Combination Figure 3 and Figure 4 As shown, in some embodiments, the flexible circuit board 812 is provided with a second printed circuit 817, which passes through the outer side of the connector pad 815 and connects to the outer end of the connector pad 815. In other words, at least one connector pad 815 is connected to printed circuits on both the left and right sides along a first direction. The first direction can be the arrangement direction of the battery cell 82. Compared with the single-sided wiring method of the connector pad in the prior art, the dual-sided wiring method of the front and rear connector pads (i.e., wiring on both the front and rear sides) can simplify the design difficulty of dense lines entering the connector pad section and accommodate more line arrangement schemes. In other words, the simultaneous dual-sided wiring of the connector pads allows for the selection of a design scheme that is more conducive to line planning, reduces design difficulty, and meets the acquisition requirements of more functions.

[0040] Combination Figure 3 and Figure 5As shown, the flexible circuit board 812 has multiple temperature sensor pads 818 along its edge, and multiple third printed circuit lines 819 on it. These third printed circuit lines 819 enter from both sides of the temperature sensor pads 818 and connect to them. Compared to the single-sided entry method of temperature sensor pads in existing technologies, the dual-sided entry method allows for connection to the current temperature sensor via the entry point, and also enables connection to the next temperature sensor via the exit point of the same pad. Furthermore, all temperature sensors in the integrated busbar can be connected in parallel on a single line to the corresponding chip channel, with the other electrode of each temperature sensor independently entering the corresponding chip channel. This parallel connection of all temperature sensor electrode lines on the same line significantly reduces the printed circuit area and connector pins on the flexible circuit board, achieving cost reduction and optimization. Additionally, the space freed up by the dual-sided entry method can be allocated to voltage acquisition channels, reducing the internal resistance of the acquisition lines, thereby reducing the acquisition voltage drop and improving real-time acquisition accuracy. In this embodiment, the integrated busbar allows the internal resistance of all voltage acquisition channels to be controlled within 200mΩ and the acquisition deviation to be controlled within 5mV, thus achieving precise control of the battery cells.

[0041] like Figure 7 As shown, this embodiment of the invention also proposes a battery cell module 8, comprising multiple battery cell columns 80 arranged side by side. Each battery cell column includes an integrated busbar 81 provided in the above embodiment and M battery cells 82 arranged in the same direction. The integrated busbar is disposed on the battery cells 82, and M is a positive integer. The value of M is set according to actual needs and is not specifically limited. For example, M is 12. The number of columns 80 is 4.

[0042] like Figure 7 As shown, the battery cell module also includes a series bus 7, which connects multiple battery cell columns 80 in series.

[0043] Combination Figures 7 to 10 As shown, this utility model embodiment also proposes an energy storage battery pack, including the cell module 8, the adapter harness 83, and the battery management unit integrated module 4 provided in the above embodiment. The battery management unit integrated module 4 has P BMU interfaces 41, and the adapter harness has P first connectors and Q second connectors. The first connectors are connected to the cell module, and the second connectors are connected to the BMU interfaces, where P and Q are both positive integers, and P is greater than Q.

[0044] Figure 7The module has four cell rows 80, each containing 12 cells 82, for a total of 48 cells. These 48 cells are numbered sequentially. The adapter harness 83 has multi-strand wires. For example, P is 4 and Q is 3. The BMU interface includes BMU Interface 1, BMU Interface 2, and BMU Interface 3. The adapter harness is connected as follows: BMU Interface 1 collects information from cells 1-12 in Cell Row 1 and cells 13-16 in Cell Row 2; BMU Interface 2 collects information from cells 17-24 in Cell Row 2 and cells 25-32 in Cell Row 3; and BMU Interface 3 collects information from cells 33-36 in Cell Row 3 and cells 37-48 in Cell Row 4.

[0045] The energy storage battery pack in this embodiment breaks away from the industry's conventional approach of one BMU interface corresponding to one battery column. Instead, it allows each BMU chip to be directly connected to the corresponding battery cell via the acquisition interface, enabling each chip to collect data from more battery cells to the maximum extent possible, thereby reducing the number of chips used in the BMU and the cost of optimization solutions.

[0046] The energy storage battery pack also includes a liquid-cooled lower housing 1 and a cover 5. The cell modules are mounted on the liquid-cooled lower housing 1, and the cover 5 is detachably connected to it. The battery management unit integration module 4 is located on the front wall of the cover 5. The liquid-cooled lower housing 1 provides support for the cell modules and also functions as a liquid cooling system, ensuring even heat dissipation for all cells within the battery module and guaranteeing safe and comfortable operation. The cover 5, as the main covering of the energy storage battery pack, is made of insulating material, optimizing the insulation performance of the energy storage battery pack and reducing the safety risk of short circuits during production. The front end of the battery management unit integration module 4 is connected to an outer cover 3, providing protection for the internal components.

[0047] The energy storage battery pack also includes multiple lifting lugs 6 and fasteners. The fasteners pass through the lifting lugs 6 and the cover 5 in sequence and are then connected to the liquid-cooled lower housing 1. At the same time, the lifting lugs 6 provide good space for lifting, which can realize automated operations in the process of unloading, transportation, and lifting of the energy storage battery pack.

[0048] The energy storage battery pack also includes a panel integration module 2, which is located on the front wall of the cover 5. The panel integration module 2 integrates the main positive interface, main negative interface, fire extinguishing interface, fuse, and communication interface of the energy storage battery pack. These components are processed modularly outside the main production line, improving the production efficiency of the main production line and reducing production difficulty. The top and sides of the cover 5 have strip-shaped recesses. These recesses can form reinforcing ribs, improving structural strength and preventing the cover 5 from collapsing.

[0049] The battery pack contains multiple cell rows, each typically containing fewer than 13 cells. A single chip in the battery management unit (BMU) collects voltage and temperature data for each cell row. Currently, a typical chip provides 18 voltage acquisition channels; however, by using the adapter harness in this embodiment, the voltage acquisition channels on the chip can be utilized to the maximum extent.

[0050] In summary, the energy storage battery pack of this utility model improves the overall benefits of the energy storage battery system by optimizing the integrated busbar circuit design, simplifying circuit design and chip requirements, improving data acquisition accuracy, increasing production efficiency, simplifying the production process of matching wire harnesses, thereby improving the production yield, reducing the failure rate after on-site commissioning, and improving the safety performance of cell management.

[0051] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this utility model, the terms "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated busbar, characterized by, The aluminum bars (811) are arranged around the edge of the flexible circuit board (812), and the aluminum bars (811) are arranged on the blister tray (813) and connected with the blister tray (813). The flexible circuit board (812) is provided with a first printed circuit (816), and the first end of the first printed circuit (816) has a plurality of branches.

2. The integrated busbar of claim 1, wherein, The flexible circuit board (812) is provided with a second printed circuit (817), and the second printed circuit (817) passes through the outside of the connector pad (815) and is connected with the outer end of the connector pad (815).

3. The integrated busbar of claim 1, wherein, The edge of the flexible circuit board (812) is provided with a plurality of temperature sensor pads (818), and the flexible circuit board (812) is provided with a plurality of third printed circuits (819), and the third printed circuits (819) are connected with the temperature sensor pads (818) from both sides of the temperature sensor pads (818).

4. An electrochemical cell module, characterized by, The battery cell module comprises a plurality of battery cell columns (80) arranged side by side, each battery cell column (80) comprising the integrated busbar of any one of claims 1 to 3 and M battery cells (82) arranged in the same direction, and the integrated busbar is arranged on the battery cells (82), wherein M is a positive integer.

5. The battery cell module of claim 4, wherein, The battery cell module further comprises a series busbar (7) connecting the plurality of battery cell columns (80) in series.

6. An energy storage battery pack, characterized by, The battery cell module further comprises a battery management unit integrated module (4) having N BMU interfaces, a conversion harness (83) having P first connectors and Q second connectors, wherein the first connectors are connected with the battery cell module, the second connectors are connected with the BMU interfaces, P and Q are positive integers, and P is greater than Q.

7. The energy storage battery pack of claim 6, wherein, The battery cell module further comprises a liquid-cooled lower box (1) and a box cover (5), wherein the battery cell module is arranged on the liquid-cooled lower box (1), the box cover (5) is detachably connected with the liquid-cooled lower box (1), and the battery management unit integrated module (4) is arranged on the front wall of the box cover (5).

8. The energy storage battery pack of claim 7, wherein, The battery cell module further comprises a plurality of lifting lugs (6) and fasteners, wherein the fasteners are sequentially connected with the liquid-cooled lower box (1) after passing through the lifting lugs (6) and the box cover (5).

9. The energy storage battery pack of claim 8, wherein, The battery cell module further comprises a panel integrated module (2) arranged on the front wall of the box cover (5).

10. The energy storage battery pack of claim 7, wherein, The top surface and the side surface of the box cover (5) are provided with a strip-shaped recess.

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