Battery cell assembly, battery pack, and vehicle

Abstract

The present application provides an electric cell assembly, a battery pack and a vehicle, the electric cell assembly is used for a vehicle, the electric cell assembly includes a plurality of single batteries and connecting rows, wherein each single battery and the single battery adjacent to it are not only mechanically connected but also electrically connected by the connecting row.

Description

Technical Field

[0001] This invention relates to the field of vehicle battery technology, and more specifically, to a cell assembly, a battery pack including the cell assembly, and a vehicle including the battery pack. Background Technology

[0002] Battery modules used in automobiles are typically assembled from multiple individual cells, which are usually electrically connected to each other using laser welding. Therefore, in the aftermarket, individual battery cells often cannot be replaced individually when they fail; the entire module must be replaced. Even in some battery packs without module designs, the entire pack needs to be replaced when certain individual cells fail. Summary of the Invention

[0003] One aspect of the technical problem to be solved by the present invention is how to enable individual cells in a battery pack to be replaced individually in the event of a failure.

[0004] Furthermore, other aspects of the present invention are also intended to solve or alleviate other technical problems existing in the prior art.

[0005] This invention provides a cell assembly, a battery pack, and a vehicle. Specifically, according to one aspect of the invention, the following is provided: A battery cell assembly for a vehicle, the battery cell assembly comprising a plurality of individual cells and a connecting bar, wherein each individual cell and adjacent individual cells are not only mechanically connected but also electrically connected via the connecting bar.

[0006] Optionally, according to one embodiment of the present invention, the single cell is configured as an elongated cell and has a first end and a second end along its length. A first power output terminal is configured on the first end, and a second power output terminal is configured on the second end. The first power output terminal and the second power output terminal are respectively mechanically connected and electrically connected to different connection bars.

[0007] Optionally, according to one embodiment of the present invention, a first power connection interface and a second power connection interface are constructed on the connection bar, which are electrically connected to each other inside the connection bar. The first power connection interface is not only mechanically connected to the first power output terminal of a single battery cell but also electrically connected, and the second power connection interface is not only mechanically connected to the second power output terminal of an adjacent single battery cell but also electrically connected.

[0008] Optionally, according to one embodiment of the present invention, a voltage sampling terminal is further constructed on the second end of the single cell for collecting the voltage of the first end of the single cell. The voltage sampling terminal is electrically connected to the first power output terminal inside the single cell, and the voltage sampling terminal is electrically connected to a connection bar connected to the corresponding second power output terminal.

[0009] Optionally, according to one embodiment of the present invention, a voltage sampling input interface and a voltage sampling output interface electrically connected to each other are constructed on the connection bar. The voltage sampling input interface is electrically connected to the voltage sampling terminal of a single cell connected to the connection bar via a corresponding second power output terminal. The voltage sampling output interface is electrically connected to the first power connection interface and the second power connection interface inside the connection bar.

[0010] Optionally, according to one embodiment of the present invention, one or more of the following connections are made: the connection between the first power output terminal and the first power connection interface; the connection between the second power output terminal and the second power connection interface; the connection between the voltage sampling terminal and the voltage sampling input interface; and the connection between the voltage sampling input interface and the voltage sampling output interface: snap-fit ​​connection, connector connection, or bolt connection.

[0011] Optionally, according to one embodiment of the present invention, a cell venting valve is further constructed on one end of the single cell.

[0012] Optionally, according to one embodiment of the present invention, the connecting bar includes a connecting bar body and a protrusion. The connecting bar body is configured as a rectangular plate, and the protrusion is configured to protrude upward from the center of the connecting bar body. The voltage sampling input interface and the voltage sampling output interface are configured on the protrusion, and the first power connection interface and the second power connection interface are respectively arranged on both sides of the protrusion on the connecting bar body.

[0013] According to another aspect of the present invention, a battery pack is provided, wherein the battery pack includes a housing and the above-described cell assembly arranged in the housing, and the voltage sampling output interface of the connection bar is electrically connected to an in-pack sampling line interface constructed in the battery pack.

[0014] Alternatively, according to another aspect of the invention, the invention provides a vehicle comprising the battery pack described above.

[0015] The advantages of this invention include: by using connecting strips to mechanically and electrically connect individual batteries, operators can repeatedly install or remove individual batteries using hand tools, significantly improving the maintainability of individual batteries, increasing the battery pack's lifespan, and improving the efficiency of maintenance resource utilization without significantly reducing the number of batteries per unit volume of the battery pack. Attached Figure Description

[0016] Referring to the accompanying drawings, the above and other features of the present invention will become apparent, wherein, Figure 1 A schematic diagram of the structure of a battery pack according to an embodiment of the present invention is shown; Figure 2 A partially enlarged view of point A of a battery pack according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the structure of a single cell of a battery assembly according to an embodiment of the present invention is shown. Figure 4 A schematic diagram of the connection bar of a battery cell assembly according to an embodiment of the present invention is shown. Detailed Implementation

[0017] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0018] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," "third," and similar expressions are used for descriptive and distinguishing purposes only and should not be construed as indicating or implying the relative importance of the corresponding components.

[0019] refer to Figure 1 This illustrates a schematic diagram of a battery pack according to an embodiment of the present invention. Figure 1In one embodiment, the battery pack of the present invention is used in a vehicle and includes a housing 100 and a cell assembly 200 disposed within the housing 100. The cell assembly 200 includes a plurality of individual cells 1 and a connecting bar 2, wherein each individual cell and its adjacent individual cells are mechanically and electrically connected via the connecting bar. (Reference) Figure 2 It shows a partially enlarged view of point A of a battery pack according to an embodiment of the present invention, from Figure 2 As can be seen, multiple individual battery cells 1 are arranged side by side and flush with each other. Each individual battery cell and its adjacent individual battery cells are connected at their ends by connecting strips. That is, two adjacent individual battery cells 1 are actually connected at their two ends by two connecting strips 2. For a single battery cell with two adjacent individual battery cells on the left and right, it is connected to the two adjacent individual battery cells at one end by a connecting strip 2. In other words, one end of the single battery cell 1 is connected to two connecting strips 2.

[0020] refer to Figure 3 This diagram illustrates the structure of a single cell in a battery assembly according to an embodiment of the present invention. In this embodiment, the single cell 1 is configured as an elongated battery, for example, a rectangular prismatic battery, and the capacity of the single cell 1 is, for example, greater than or equal to 300 Ah. The single cell 1 has a first end 11 and a second end 12 along its length. A first power output terminal 111 is configured on the first end 11, and a second power output terminal 121 is configured on the second end 12, for outputting power from the positive and negative terminals, respectively. The first end 11 and the second end 12 are mechanically and electrically connected to different connectors 2 via the first power output terminal 111 and the second power output terminal 121, respectively. A cell vent valve 112 is also configured on the first end 11 of the single cell 1 for venting and cooling the cell, preventing thermal expansion. Of course, in embodiments not shown, the cell vent valve 112 can also be configured on the second end 12 of the single cell. Because... Figure 3 In the embodiment, the single battery 1 is constructed in an elongated shape, and the distance between the two power output terminals 111 and 121 is relatively far. Therefore, a voltage sampling terminal 122 is also constructed on the second end 12 to collect the voltage of the first end 11 of the single battery 1. The voltage sampling terminal 122 and the first power output terminal 111 are electrically connected inside the single battery 1, and the voltage sampling terminal 122 is electrically connected to the connection row 2 connected to the corresponding second power output terminal 121.

[0021] refer to Figure 4This diagram illustrates a structural schematic of a connection bar for a battery cell assembly according to an embodiment of the present invention. The connection bar 2 includes a connection bar body 21 and a protrusion 22. The connection bar body 21 is constructed as a rectangular plate, and the protrusion 22 protrudes upward from the center of the connection bar body 21. A first power connection interface 211 and a second power connection interface 212 are constructed on the connection bar body 21. In this embodiment, they are arranged on both sides of the protrusion 22 on the connection bar body 21, and the first power connection interface 211 and the second power connection interface 212 are electrically connected inside the connection bar body 21. The first power connection interface 211 is mechanically and electrically connected to the first power output terminal 111 of a single battery cell, and the second power connection interface 212 is mechanically and electrically connected to the second power output terminal 121 of an adjacent single battery cell. That is, the two ends 11 and 12 of the single battery cell 1 and the two ends of its adjacent single battery cell are arranged oppositely, i.e., a single connection bar 2 connects to the first power output terminal of a single battery cell and the second power output terminal of its adjacent single battery cell.

[0022] exist Figure 4 In one embodiment, a voltage sampling input interface 221 electrically connected to each other is constructed on the protrusion 22 of the connecting row 2. Figure 4 The voltage sampling input interface 221 is located on the back of the voltage sampling output interface 222 (not specifically shown). The voltage sampling input interface 221 is electrically connected to the voltage sampling terminal 122 of the individual battery 1 connected to the connection bar 2 via the second power output terminal 121. The voltage sampling output interface 222 is connected to the first power connection interface 211 and the second power connection interface 212. In this way, the voltages of both the positive and negative terminals of the individual battery 1 can be sampled through the voltage sampling output interface 222. In this manner, the voltage sampling terminal 122 of each individual battery 1 is connected precisely to one connection bar 2, allowing for accurate sampling of the voltage of each individual battery 1 through the connection bar 2.

[0023] According to another aspect of the invention, a battery pack is also proposed, referring again to... Figure 1 The battery pack includes a housing 100 and a cell assembly 200 disposed within the housing 100. The voltage sampling output interface 222 of the connection bar 2 of the cell assembly 200 is electrically connected to an in-pack sampling line interface constructed within the battery pack. Figure 1 (Not shown in the image) is used to transmit the battery voltage signal to the BMS (Battery Management System) for monitoring.

[0024] It should be understood that one or more of the following connections can be, for example, snap-fit ​​connections, connector connections, or bolt connections: the connection between the first power output terminal 111 and the first power connection interface 211; the connection between the second power output terminal 121 and the second power connection interface 212; the connection between the voltage sampling terminal 122 and the voltage sampling input interface 221; the connection between the voltage sampling input interface 221 and the voltage sampling output interface 222; and the connection between the voltage sampling output interface 222 and the in-package sampling line interface.

[0025] It should be understood that the battery pack of the present invention can be installed in various vehicles, including passenger cars, trucks, buses, hybrid vehicles, pure electric vehicles, etc. Therefore, the subject matter of the present invention also aims to protect various vehicles equipped with the battery pack of the present invention.

[0026] It should be understood that all the above preferred embodiments are exemplary and not restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the legal protection scope of the present invention.

Claims

1. A battery cell assembly for a vehicle, the battery cell assembly comprising a plurality of individual battery cells and a connector bar, characterized in that, Each individual cell and its adjacent individual cells are connected not only mechanically but also electrically via a connecting bar; The single cell is constructed into an elongated cell and has a first end and a second end along its length. A first power output terminal is constructed on the first end, and a second power output terminal is constructed on the second end. The first power output terminal and the second power output terminal are respectively mechanically connected and electrically connected to different connection bars. The connection bar is provided with a first power connection interface and a second power connection interface that are electrically connected to each other inside the connection bar. The first power connection interface is not only mechanically connected to the first power output terminal of a single battery cell, but also electrically connected. The second power connection interface is not only mechanically connected to the second power output terminal of an adjacent single battery cell, but also electrically connected. A voltage sampling terminal is also constructed on the second end of the single cell for collecting the voltage of the first end of the single cell. The voltage sampling terminal is electrically connected to the first power output terminal inside the single cell, and the voltage sampling terminal is electrically connected to the connection bar connected to the corresponding second power output terminal. A voltage sampling input interface and a voltage sampling output interface are electrically connected to each other on the connection bar. The voltage sampling input interface is electrically connected to the voltage sampling terminal of a single battery connected to the connection bar via a corresponding second power output terminal. The voltage sampling output interface is electrically connected to the first power connection interface and the second power connection interface inside the connection bar. The connecting bar includes a connecting bar body and a protrusion. The connecting bar body is constructed as a rectangular plate, and the protrusion is constructed to protrude upward from the center of the connecting bar body. The voltage sampling input interface and the voltage sampling output interface are constructed on the protrusion. The first power connection interface and the second power connection interface are respectively arranged on both sides of the protrusion on the connecting bar body.

2. The battery cell assembly according to claim 1, characterized in that, One or more of the following connections are made: the connection between the first power output terminal and the first power connection interface; the connection between the second power output terminal and the second power connection interface; the connection between the voltage sampling terminal and the voltage sampling input interface; and the connection between the voltage sampling input interface and the voltage sampling output interface.

3. The battery cell assembly according to claim 1, characterized in that, A cell vent valve is also constructed at one end of the single cell.

4. A battery pack, characterized in that, The battery pack includes a housing and a cell assembly according to any one of claims 1 to 3 disposed in the housing, wherein the voltage sampling output interface of the connection bar is electrically connected to an in-pack sampling line interface constructed in the battery pack.

5. A vehicle, characterized in that, The vehicle includes the battery pack according to claim 4.

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