Battery cell data acquisition structure

Abstract

The utility model relates to the technical field of power batteries, in particular to a battery cell data acquisition structure, which comprises a support assembly and a plurality of battery cells fixed in the support assembly, the plurality of battery cells are configured into a plurality of groups, and each group of battery cells are electrically connected through a busbar; wherein a protection plate is fixed on the side face of the support assembly, a first collection structure is arranged above the support assembly, the upper side of a battery cell is collected and detected through a nickel sheet, the lower side of the battery cell is collected and detected through a wire harness, the number of the wire harnesses is reduced by integrating the two collection structures of the nickel sheet and the wire harness, and the number of the wire harnesses is reduced; the design space of the protection plate is prevented from being sacrificed, meanwhile, the problem that the labor cost is sharply increased due to collection of a single wire harness is solved, and efficient and economical cell information collection in a limited space is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a cell data acquisition structure. Background Art

[0002] With the popularization of electric vehicles and portable electronic devices, as the core energy source, the performance and safety of power batteries have been increasingly emphasized. A power battery usually consists of multiple cells, and effective monitoring and management of these cells are the key to ensuring battery performance and extending service life.

[0003] At present, the common cell data acquisition methods in the market mainly include single-wire harness acquisition and nickel sheet acquisition. For example, the data acquisition device and battery module disclosed in Chinese Patent Publication No. "CN112582760A". The single-wire harness acquisition scheme connects each cell or each battery module through a separate data wire harness. When the number of cells increases, the number of data wire harnesses needs to be increased accordingly, which not only increases the complexity of the anti-fooling design but also raises the labor installation cost. In addition, too many wire harnesses will occupy limited space and affect the overall design of the battery module.

[0004] Another nickel sheet acquisition scheme is to realize the acquisition of cell data by arranging nickel sheets on the protection board. For example, the vehicle battery pack wire harness disclosed in Chinese Patent Publication No. "CN115411463A". Although this scheme can reduce the number of wire harnesses, the layout of nickel sheets will sacrifice the layout space of other devices on the protection board, limiting the design flexibility of the protection board.

[0005] Therefore, there is an urgent need to develop a new cell data acquisition scheme that can effectively reduce the number of wire harnesses, take into account the layout of protection board devices, reduce the installation cost, and improve the space utilization rate. Content of the Utility Model

[0006] The purpose of the utility model is to propose a cell data acquisition structure to solve the above-mentioned disadvantages in the prior art.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] Design a cell data acquisition structure, including a bracket assembly and a plurality of cells fixed in the bracket assembly. The plurality of cells are configured into multiple groups, and each group of cells is electrically connected through a bus bar.

[0009] Wherein, a protection board is fixed on the side of the bracket assembly, a first acquisition structure is arranged above the bracket assembly, and a second acquisition structure is arranged below the bracket assembly. The first acquisition structure and the second acquisition structure are respectively connected to the bus bars above and below and are both electrically connected to the protection board.

[0010] Further, the bracket assembly includes an upper bracket and a lower bracket, and the battery cell is fixed between the upper bracket and the lower bracket.

[0011] Further, the first acquisition structure includes a main line, and the main line is welded to the bus bar at the top of the battery cell through a nickel sheet.

[0012] Further, a plurality of nickel sheets are arranged in a forked shape on the main line.

[0013] Further, the second acquisition structure includes wire harnesses welded to the bus bars at the bottom, and the wire harnesses converge at a joint, and the joint is connected to the protection board through a plug.

[0014] Further, a plurality of avoidance grooves are spaced apart on the end face of the lower bracket, one side of the bus bar extends and bends into the avoidance groove, and one end of the wire harness extends into the avoidance groove and is welded to the bus bar.

[0015] Further, a plurality of wire passing holes are spaced apart on the end face of the upper bracket, and the joint extends above the upper bracket along the wire passing holes.

[0016] Further, a receiving groove is provided at the top of the upper bracket, and both the first acquisition structure and the second acquisition structure are received in the receiving groove.

[0017] Further, a temperature measurement circuit is further included, one end of the temperature measurement circuit is electrically connected to the protection board, and the other end passes through the bracket assembly and extends between the plurality of battery cells.

[0018] Further, a wire guide is fixedly installed inside the upper bracket, and a part of the temperature measurement circuit is arranged in the wire guide.

[0019] A battery cell data acquisition structure proposed by the present utility model has the beneficial effects that: in the present utility model, the upper side of the battery cell is collected and detected through nickel sheets, and the lower side is collected and detected by wire harnesses. By integrating two acquisition structures of nickel sheets and wire harnesses, the number of wire harnesses is reduced, the design space of the protection board is not sacrificed, and at the same time, the problem of a sharp increase in labor costs caused by single wire harness acquisition is solved, realizing efficient and economical acquisition of battery cell information in a limited space. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a front view of the present utility model.

[0022] In the figure: 1. Bracket assembly; 11. Upper bracket; 12. Lower bracket; 13. Accommodating groove; 14. Lead frame; 2. Battery cell; 3. Protection board; 4. First acquisition structure; 41. Main line; 42. Nickel sheet; 5. Second acquisition structure; 51. Wiring harness; 52. Connector; 53. Avoidance groove; 54. Wire passing port; 6. Bus bar; 7. Temperature measurement circuit. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Referring to Figure 1-2 For an embodiment of the present invention, it discloses a battery cell data acquisition structure, which includes a bracket assembly 1 and a plurality of battery cells 2 fixed in the bracket assembly 1. Specifically, the plurality of battery cells 2 are configured in multiple groups, and each group of battery cells 2 is electrically connected through a bus bar 6. Connecting the battery cells through the bus bar 6 is a prior art and will not be elaborated here;

[0025] Among them, a protection board 3 is fixed on the side of the bracket assembly 1, a first acquisition structure 4 is arranged above the bracket assembly 1, a second acquisition structure 5 is arranged below the bracket assembly 1, and the first acquisition structure 4 and the second acquisition structure 5 are respectively connected to the bus bars 6 above and below and are both electrically connected to the protection board 3.

[0026] In some embodiments, the bracket assembly 1 includes an upper bracket 11 and a lower bracket 12, and the battery cells 2 are fixed between the upper bracket 11 and the lower bracket 12. The functions of the upper bracket 11 and the lower bracket 12 are to place the battery cells 2 and fix them in a certain position to ensure the stability of the battery cells 2 during operation.

[0027] Furthermore, in this embodiment, the first acquisition structure 4 includes a main line 41. The main line 41 is an FFC main line, which is used to connect to the bus bar after being connected to the nickel sheet 42 through an FPC branch line. The specific method will be disclosed in the prior art and will not be elaborated here. The main line 41 is welded to the bus bar 6 at the top of the battery cell 2 through the nickel sheet 42.

[0028] In addition, in order to improve the convenience during welding, in the embodiment of the present invention, a plurality of nickel sheets 42 are arranged in a bifurcated shape on the main line 41. During welding, one end of the nickel sheet 42 is passed through the upper bracket 11 to weld the bus bars 6 between each group of battery cells 2. In this embodiment, since the plurality of nickel sheets 42 are in a bifurcated structure part, the bus bars 6 can be conveniently connected, and at the same time, the bifurcated structure design can also evenly distribute the current, improving the reliability and stability of the connection.

[0029] In some embodiments, the second collection structure 5 in the present utility model includes wire harnesses 51 welded to each bus bar 6 at the bottom. Each of the wire harnesses 51 converges to form a connector 52. The connector 52 is connected to the protection board 3 through a plug. The connection method of the wire harnesses 51 is also well-known to those skilled in the art, so it will not be elaborated here.

[0030] Furthermore, in this embodiment, a plurality of avoidance grooves 53 are spaced apart on the end face of the lower frame 12. One side of the bus bar 6 extends and bends into the avoidance grooves 53. One end of the wire harness 51 extends into the avoidance grooves 53 and is welded to the bus bar 6. That is, in this embodiment, the avoidance grooves 53 are designed for the bottom bus bar 6. Through this structure, a part of the bottom bus bar 6 can be extended, so as to facilitate welding with the wire harness 51 and improve the convenience of welding.

[0031] Based on the above embodiments, in the present utility model, a plurality of wire passing openings 54 are spaced apart on the end face of the upper frame 11. The connector 52 extends above the upper frame 11 along the wire passing openings 54.

[0032] It should be noted that in order to provide accommodation for the main wire 41 and the connector 52 in the present utility model, a receiving groove 13 is provided at the top of the upper frame 11 in this embodiment. Both the first collection structure 4 and the second collection structure 5 are accommodated in the receiving groove 13. That is to say, in this embodiment, the main wire 41, the connector 52, and the plug connected to the connector 52 are placed in the receiving groove 13 to improve the convenience of wiring and achieve overall storage without interfering with the installation of other components.

[0033] In some embodiments, the present utility model further includes a temperature measurement circuit 7. One end of the temperature measurement circuit 7 is electrically connected to the protection board 3, and the other end passes through the bracket assembly 1 and extends between a plurality of the battery cells 2. Specifically, the temperature measurement circuit 7 includes a wire and a thermistor. One end of the thermistor is connected to the protection board 3 through a wire, and the other end extends towards the battery cell 2 and is attached to the surface of the battery cell to realize the temperature detection of the battery cell 2. In this way, the current and temperature of the battery cell 2 can be detected, improving the comprehensiveness of detection.

[0034] Of course, in order to guide and route the above temperature measurement circuit 7, a wire holder 14 is fixedly installed inside the upper frame 11 in the present utility model. A part of the temperature measurement circuit 7 is arranged in the wire holder 14. Specifically, in this embodiment, the wire of the thermistor is placed in the wire holder 14. Further, a wire clip can be provided in the wire holder 14 to realize the clamping and fixing of the wire and improve the stability of the wire routing.

[0035] In summary, in the present utility model, the upper side of the battery cell 2 is detected by collecting through the nickel sheet 42, and the lower side is detected by collecting through the wire harness 51. By integrating the two collecting structures of the nickel sheet 42 and the wire harness 51, the number of wire harnesses 51 is reduced, the design space of the protection board 3 is avoided from being sacrificed, and at the same time, the problem of a sharp increase in labor costs caused by single wire harness 51 collection is solved, realizing efficient and economical collection of battery cell 2 information in a limited space.

[0036] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A battery cell data acquisition structure, comprising a bracket assembly (1) and a plurality of battery cells (2) fixed in the bracket assembly (1), characterized in that: A plurality of the battery cells (2) are configured into multiple groups, and the battery cells (2) in each group are electrically connected through a bus bar (6); Among them, a protection board (3) is fixed on the side of the bracket assembly (1), a first acquisition structure (4) is arranged above the bracket assembly (1), a second acquisition structure (5) is arranged below the bracket assembly (1), and the first acquisition structure (4) and the second acquisition structure (5) are respectively connected to the bus bars (6) above and below and are both electrically connected to the protection board (3).

2. The core data acquisition structure according to claim 1, wherein: The bracket assembly (1) includes an upper bracket (11) and a lower bracket (12), and the battery cell (2) is fixed between the upper bracket (11) and the lower bracket (12).

3. The cell data acquisition structure according to claim 1, wherein: The first acquisition structure (4) includes a main wire (41), and the main wire (41) is welded to the bus bar (6) at the top of the battery cell (2) through a nickel sheet (42).

4. A cell data acquisition structure according to claim 3, characterized in that: A plurality of the nickel sheets (42) are arranged in a bifurcated manner on the main wire (41).

5. The structure for collecting cell data according to claim 2, wherein: The second acquisition structure (5) includes wire harnesses (51) welded to the bus bars (6) at the bottom, and the wire harnesses (51) converge together to form a connector (52), and the connector (52) is connected to the protection board (3) through a plug.

6. The cell data acquisition structure according to claim 5, wherein: A plurality of avoidance grooves (53) are spaced apart on the end face of the lower bracket (12), one side of the bus bar (6) extends and bends into the avoidance grooves (53), and one end of the wire harness (51) extends into the avoidance grooves (53) and is welded to the bus bar (6).

7. The core data acquisition structure according to claim 5, wherein: A plurality of wire passing openings (54) are spaced apart on the end face of the upper bracket (11), and the connector (52) extends above the upper bracket (11) along the wire passing openings (54).

8. The cell data acquisition structure according to claim 7, characterized in that: A receiving groove (13) is arranged at the top of the upper bracket (11), and both the first acquisition structure (4) and the second acquisition structure (5) are received in the receiving groove (13).

9. The structure for collecting cell data according to claim 2, wherein: It further includes a temperature measurement circuit (7), one end of the temperature measurement circuit (7) is electrically connected to the protection board (3), and the other end passes through the bracket assembly (1) and extends between the plurality of battery cells (2).

10. The cell data acquisition structure according to claim 9, characterized in that: A wire guide frame (14) is fixedly installed inside the upper bracket (11), and a part of the temperature measurement circuit (7) is arranged in the wire guide frame (14).

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