Device for collecting battery parameters

Abstract

A device for battery parameter acquisition relates to equipment for testing, measuring or monitoring the electrical condition of a storage battery or a battery. The utility model relates to a battery parameter acquisition system, which aims to solve the problem that the system fault is easily caused by the adoption of open wires in the conventional battery parameter acquisition system, and comprises an acquisition board, a plurality of conducting bars and conducting bands with the same number as the conducting bars, two adjacent battery cells in the tested series battery pack are electrically connected through a conducting bar; the acquisition board is fixed above the conducting bar; a metal wire is arranged on the surface of the acquisition board, and one end of the metal wire can be electrically connected with the battery management device; a connecting through hole is formed in a position, directly facing each conducting bar, of the acquisition plate; the conductive bands are in one-to-one correspondence with the conductive bars; one end of the conductive band passes through the connecting through hole and is electrically connected with the corresponding conductive bar, and the other end of the conductive band is electrically connected with the other end of the corresponding metal wire.

Description

Technical Field

[0001] This utility model relates to a device for testing, measuring or monitoring the electrical condition of a storage battery or battery. Background Technology

[0002] The lithium batteries in electric bicycles typically have their voltage, temperature, and other information collected by the management system, making the reliability of the data collection system crucial. Existing battery parameter acquisition systems often use data acquisition harnesses. However, these harnesses involve exposed wiring, which is messy, difficult to secure, and prone to detachment, movement, and damage from compression, leading to short circuits, loose connections, and system malfunctions. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem that existing battery parameter acquisition systems use exposed wiring, which can easily cause system failures, and to provide a device for battery parameter acquisition.

[0004] The device for acquiring battery parameters according to this utility model includes an acquisition board, multiple conductive bars, and conductive strips of the same number as the conductive bars;

[0005] In the series-connected battery pack under test, each two adjacent cells are electrically connected through a busbar.

[0006] The data acquisition board is fixed above the conductive busbar;

[0007] The surface of the acquisition board is covered with metal traces, one end of which can be electrically connected to the battery management device; and the acquisition board has a connection through hole for each conductive bar.

[0008] Each conductive strip corresponds one-to-one with a conductive busbar.

[0009] One end of the conductive strip passes through the connecting through hole and is electrically connected to the corresponding conductive bus, while the other end is electrically connected to the other end of the corresponding metal trace.

[0010] The beneficial effects of this utility model are:

[0011] This utility model relates to a device for battery parameter acquisition. It uses an acquisition board, conductive busbars, and conductive busbars instead of acquisition wire harnesses. The fixing method is simple and there are no exposed wires. It is not easy to fall off, move, or be crushed and damaged. It has high reliability, reduces the failure rate of the acquisition system, and improves the product quality of battery packs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the device for battery parameter acquisition according to this utility model;

[0013] Figure 2 This is a schematic diagram showing the disassembled structure of the device for battery parameter acquisition according to this utility model;

[0014] Figure 3 This is a top view of the device for acquiring battery parameters according to this utility model;

[0015] Figure 4 This is a schematic diagram showing the assembly of the acquisition board, conductive strip, and connector components in the battery parameter acquisition device of this utility model.

[0016] Figure 5 This is a schematic diagram of the assembly structure of the battery pack, conductive busbar, and protective sleeve in the device for acquiring battery parameters according to this utility model.

[0017] Figure 6 This is a schematic diagram of the battery pack in the device for acquiring battery parameters according to this utility model. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention. Specific Implementation Method 1

[0022] The device for acquiring battery parameters in this embodiment includes an acquisition board 1, multiple conductive bars, and conductive strips 3 in the same number as the conductive bars;

[0023] In the tested series-connected battery pack 4, two adjacent cells are electrically connected through a busbar.

[0024] The data acquisition board 1 is fixed above the conductive busbar;

[0025] The surface of the acquisition board 1 is covered with metal traces, one end of which can be electrically connected to the battery management device; and the acquisition board 1 has a connection through hole 5 for each conductive bar.

[0026] Each conductive strip 3 corresponds one-to-one with a conductive busbar;

[0027] One end of the conductive strip 3 passes through the connecting through hole 5 and is electrically connected to the corresponding conductive busbar, while the other end is electrically connected to the other end of the corresponding metal trace.

[0028] Specifically, in this embodiment, battery pack 4 is a 48V battery pack or a 60V battery pack.

[0029] like Figures 1-2 , Figure 6 As shown, the battery cells in battery pack 4 are bonded together using 3M tape. The conductive busbars are laser-welded to the cell terminals, and then the acquisition board 1 (PCB board) is fixed above battery pack 4. The conductive strip 3 is soldered to the acquisition board 1. Finally, the conductive strip 3 on the acquisition board 1 is laser-welded to the conductive busbars.

[0030] Since the cells are connected by conductive busbars, and the conductive strip 3 is connected to each conductive busbar, the parameters of each battery can be collected through the conductive strip 3. Specific Implementation Method Two

[0032] This embodiment is a further explanation of embodiment one. In this embodiment, a protective cover is also included.

[0033] The protective sleeve is fitted onto the outer wall of the series-connected battery pack 4 being tested.

[0034] The other technical features of this embodiment are exactly the same as those of Embodiment 1.

[0035] Specifically, such as Figure 2 , 5 As shown, the protective sleeve is used to secure the neatly arranged battery cells, forming an M-row, N-column battery pack. It also protects the vulnerable parts of the battery cells. Specific Implementation Method 3

[0037] This embodiment is a further explanation of embodiment two. In this embodiment, the protective sleeve includes an upper protective sleeve 6 and a lower protective sleeve 7.

[0038] The upper sheath 6 is fitted onto the upper outer wall of the battery pack 4;

[0039] The lower sheath 7 is fitted onto the lower outer wall of the battery pack 4;

[0040] The top of battery pack 4 is the positive terminal of the battery cell and the exposed end of the positive terminal of the battery cell.

[0041] The other technical features of this embodiment are exactly the same as those of Embodiment 2.

[0042] Specifically, such as Figure 2 , 5 As shown, after multiple cells in battery pack 4 are fixed and formed, the upper sheath 6 and the lower sheath 7 are installed.

[0043] The battery packs used in electric vehicles are typically bipolar battery packs, meaning that the positive and negative terminals of the battery cells are located at the same end. Therefore, it is relatively easy to connect the cells in series or in parallel at this end.

[0044] The upper sheath 6 is placed on the top of the battery pack 4, and the lower sheath 7 is placed on the bottom of the battery pack 4. By fixing the upper and lower sheaths together, the battery pack 4, which consists of multiple battery cells, is secured, while protecting the top and bottom of the battery cells. Specific Implementation Method Four

[0046] This embodiment is a further explanation of embodiment three. In this embodiment, the upper sheath 6 is provided with multiple conductive row limiting grooves 8.

[0047] The number of conductive busbar limiting grooves 8 is equal to the number of conductive busbars, and their positions are directly opposite each other;

[0048] The conductive busbar is embedded in the corresponding conductive busbar limiting groove 8

[0049] The acquisition plate 1 is fixed above the upper sheath 6.

[0050] The other technical features of this embodiment are exactly the same as those of Embodiment 3.

[0051] Specifically, such as Figures 2-5 As shown, the upper sheath 6 has connecting aluminum busbar limiting grooves to prevent incorrect installation. The conductive busbar limiting grooves 8 on the upper sheath 6 are positioned directly opposite the locations where the conductive busbars of the battery cell need to be fixed, and are adapted to the contours of the conductive busbars. After the upper sheath 6 is fixed above the battery pack 4, each conductive busbar is then embedded into its corresponding conductive busbar limiting groove 8, and the two ends of the conductive busbar are welded to the positive and negative terminals of the battery cell, thus connecting the battery cells and connecting them in series.

[0052] After the conductive busbar and the battery cell core are welded together, the acquisition board 1 is fixed onto the upper sheath 6. Detailed Implementation Method Five

[0054] This embodiment is a further explanation of embodiment one, two, three or four. In this embodiment, multiple battery cells are arranged in N rows and M columns; where N is greater than or equal to 2 and M is greater than or equal to 2.

[0055] The positive and negative terminals of all cells in each row are arranged in the same order, and the positive and negative terminals of cells in odd-numbered rows are arranged in the opposite direction to those in even-numbered rows.

[0056] The other technical features of this embodiment are exactly the same as those of Embodiment 1, 2, 3 or 4.

[0057] Specifically, such as Figure 6As shown, battery pack 4 is typically composed of multiple cells stacked and arranged closely together. In this embodiment, battery pack 4 is composed of 7 rows (N=7) and 2 columns (M=2) of cells, and multiple cells are fixed together by means of 3M adhesive or the like. Specific Implementation Method Six

[0059] This embodiment is a further explanation of embodiment five. In this embodiment, the conductive bus includes a first aluminum bus 2-1.

[0060] Two adjacent cells in each row are connected in series via the first aluminum busbar 2-1.

[0061] The other technical features of this embodiment are exactly the same as those of Embodiment 5.

[0062] Specifically, such as Figure 2 , 5 As shown, after the upper sheath 6 and lower sheath 7 are installed on the battery pack 4, the conductive busbar can be welded. There are three types of conductive busbars. In this embodiment, the conductive busbar is the first aluminum busbar 2-1, which is used to connect the cells in each row in series. The previous cell is connected in series with the next cell through a first aluminum busbar 2-1. Detailed Implementation Method Seven

[0064] This embodiment is a further explanation of embodiment five. In this embodiment, the conductive busbar also includes a second aluminum busbar 2-2.

[0065] The second aluminum busbar 2-2 connects the cells of two adjacent rows in series.

[0066] The other technical features of this embodiment are exactly the same as those of Embodiment 5.

[0067] Specifically, such as Figure 2 , 5 As shown, the conductive busbar in this embodiment is the second aluminum busbar 2-2, which is used to connect the cells in two adjacent rows in series. That is, except for the first cell in the first row and the last cell in the last row, the second aluminum busbar 2-2 is used to connect the cells in each row in series again to form an S-shaped series structure.

[0068] It also includes a third aluminum busbar 2-3, which is used to lead out the positive and negative terminals of the battery pack 4, and is electrically connected to the positive (negative) terminal of the first cell in the first row and the negative (positive) terminal of the last cell in the last row, respectively. Detailed Implementation Method Eight

[0070] This embodiment is a further explanation of embodiment six or seven. In this embodiment, the conductive strip 3 is a nickel-plated steel strip.

[0071] The other technical features of this embodiment are exactly the same as those of embodiment six or seven.

[0072] Specifically, such as Figures 1-5 As shown, steel strip has high mechanical strength and can withstand certain pressure and tension without easily deforming or breaking. Nickel has good electrical conductivity, and nickel plating can improve the conductivity of the steel strip, thus ensuring effective current transmission. At the same time, the surface of nickel-plated steel strip is smooth and flat, making it easy to perform laser or ultrasonic welding. Detailed Implementation Method Nine

[0074] This embodiment is a further description of embodiment one, two, three, four or seven. In this embodiment, a connector 9 is also included.

[0075] The connector 9 is fixed on the acquisition board 1, and the connector 9 can connect to the battery management device.

[0076] One end of the connector 9 is electrically connected to the battery management device, and the other end is electrically connected to the corresponding conductive strip 3 via a metal trace.

[0077] The other technical features of this embodiment are exactly the same as those of Embodiments 1, 2, 3, 4 or 7.

[0078] Specifically, such as Figures 1-5 As shown, the connector 9 is used to connect devices in the battery cell management system that collect battery cell parameters, such as current sensors, voltage sensors, and temperature sensors. It connects to the corresponding battery cell via conductive strip 3 and conductive busbars for parameter acquisition. Detailed Implementation Method Ten

[0080] This embodiment is a further explanation of embodiment three, four or seven. In this embodiment, both the acquisition plate 1 and the upper sheath 6 are provided with screw holes that are directly opposite each other. The acquisition plate 1 is fixed to the upper sheath 6 by the cooperation of screws and screw holes.

[0081] Specifically, after the conductive busbar and the battery cell core are welded together, the acquisition board 1 is fixed to the upper sheath 6 with screws, so that the acquisition board 1 is positioned directly above the upper sheath 6 and the conductive busbar.

[0082] Other technical features of this embodiment are exactly the same as those of embodiments three, four, or seven. Although the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other embodiments.

Claims

1. A device for acquiring battery parameters, characterized in that, It includes a data acquisition board (1), multiple conductive bars, and conductive strips (3) in the same number as the conductive bars; In the series-connected battery pack (4) under test, two adjacent cells are electrically connected through a busbar; The acquisition board (1) is fixed above the conductive busbar; The surface of the acquisition board (1) is provided with metal traces, one end of which can be electrically connected to the battery management device; and the acquisition board (1) is provided with a connection through hole (5) for each conductive bar. The conductive strip (3) corresponds one-to-one with the conductive busbar; One end of the conductive strip (3) passes through the connecting through hole (5) and is electrically connected to the corresponding conductive busbar, and the other end is electrically connected to the other end of the corresponding metal trace.

2. The device for battery parameter acquisition according to claim 1, characterized in that, It also includes a protective case; The protective sleeve is fitted onto the outer wall of the tested series battery pack (4).

3. The device for battery parameter acquisition according to claim 2, characterized in that, The protective sleeve includes an upper sheath (6) and a lower sheath (7); The upper sheath (6) is fitted onto the upper outer wall of the battery pack (4); The lower sheath (7) is fitted onto the lower outer wall of the battery pack (4); The top of the battery pack (4) is the positive terminal of the battery cell and the exposed end of the positive terminal of the battery cell.

4. The device for battery parameter acquisition according to claim 3, characterized in that, The upper sheath (6) is provided with multiple conductive row limiting grooves (8); The number of conductive bar limiting grooves (8) is equal to the number of conductive bars and their positions are directly opposite each other; The conductive bar is embedded in the corresponding conductive bar limiting groove (8). The acquisition plate (1) is fixed above the upper sheath (6).

5. The device for battery parameter acquisition according to claim 1, 2, 3 or 4, characterized in that, Multiple battery cells are arranged in N rows and M columns; where N is greater than or equal to 2 and M is greater than or equal to 2. The positive and negative terminals of all cells in each row are arranged in the same order, and the positive and negative terminals of cells in odd-numbered rows are arranged in the opposite direction to those in even-numbered rows.

6. The device for battery parameter acquisition according to claim 5, characterized in that, The conductive bus includes a first aluminum bus (2-1); Two adjacent cells in each row are connected in series through the first aluminum busbar (2-1).

7. The device for battery parameter acquisition according to claim 5, characterized in that, The conductive bus also includes a second aluminum bus (2-2); The second aluminum busbar (2-2) connects the cells of two adjacent rows in series.

8. The device for battery parameter acquisition according to claim 6 or 7, characterized in that, The conductive strip (3) is a nickel-plated steel strip.

9. The device for battery parameter acquisition according to claim 1, 2, 3, 4 or 7, characterized in that, It also includes a connector (9); The connector (9) is fixed on the acquisition board (1), and the connector (9) can connect to the battery management device; One end of the connector (9) is electrically connected to the battery management device, and the other end is electrically connected to the corresponding conductive strip (3) through a metal trace.

10. The device for battery parameter acquisition according to claim 3, 4 or 7, characterized in that, Both the acquisition plate (1) and the upper sheath (6) are provided with screw holes that are directly opposite each other. The acquisition plate (1) is fixed to the upper sheath (6) by the cooperation of screws and screw holes.

Images