Battery signal sampling device and battery system

Abstract

The utility model provides a battery signal sampling device and a battery system, and belongs to the technical field of batteries, the battery signal sampling device comprises an isolation plate, a confluence assembly, a flexible circuit board and a battery sampling plate, the isolation plate is provided with a first side surface and a second side surface which are arranged back to back, and the first side surface is divided into a first area and a second area along a first direction; the confluence assemblies are arranged on the first side face in the first direction, the number of the confluence assemblies is at least one, and each confluence assembly comprises a plurality of busbars; the flexible circuit board is arranged in the first area, and the flexible circuit board is electrically connected with the busbar in the first area through the first acquisition piece; the battery sampling board is arranged in the second area, the battery sampling board is electrically connected with the busbar in the second area through the second acquisition piece, and the first end of the flexible circuit board is electrically connected with the second end of the battery sampling board. According to the battery signal sampling device provided by the utility model, the flexible circuit board and the battery sampling board are adjacently arranged on the isolation board, so that the occupied space in the vertical direction is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery signal sampling device and a battery system. Background Art

[0002] With the vigorous promotion and popularization of power batteries, the application of power batteries has become more and more mature and common. In order to ensure the safety of power batteries, it is necessary to collect and monitor the voltage and temperature of power battery cells.

[0003] Currently, flexible circuit boards are generally used to collect and transmit battery voltage and temperature signals, and then the voltage and temperature signals are transmitted to a battery sampling board; existing flexible circuit boards and battery sampling boards are generally arranged in the following manner: the flexible circuit board is arranged above the battery cell and extends along the length direction of the battery cell, and the flexible circuit board runs through the entire battery cell so that the sampling connector of the flexible circuit board can be connected to each bus or battery cell in the battery cell, and then the battery sampling board is stacked on the side of the flexible circuit board away from the battery cell, and the flexible circuit board is electrically connected to the battery sampling board to ensure that the occupied space in the planar direction is small.

[0004] However, the overlapping arrangement of the battery sampling plate and the flexible circuit board in the vertical direction increases the space occupied in the vertical direction. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that when collecting battery voltage and temperature signals through a flexible circuit board, the battery sampling plate and the flexible circuit board are arranged in an overlapping manner, which increases the space occupied in the vertical direction, thereby providing a battery signal sampling device and a battery system.

[0006] In order to solve the above technical problems, the utility model provides a battery signal sampling device, comprising:

[0007] The isolation plate has a first side surface and a second side surface disposed opposite to each other, wherein the first side surface is divided into a first area and a second area along a first direction;

[0008] A busbar assembly is arranged on the first side along a first direction, the busbar assembly has at least one busbar assembly, and each busbar assembly includes a plurality of busbars;

[0009] A flexible circuit board is arranged in the first area, and the flexible circuit board is electrically connected to the bus bar located in the first area through a first collecting member;

[0010] A battery sampling plate is arranged in the second area. The battery sampling plate is electrically connected to the bus located in the second area through a second collecting member. The first end of the flexible circuit board is electrically connected to the second end of the battery sampling plate.

[0011] Optionally, the first end and the second end are welded via a welding pad; the second collecting piece and the bus bar, and the second collecting piece and the battery sampling plate are all welded via a welding pad.

[0012] Optionally, the pads are welded by ultrasonic welding or laser welding.

[0013] Optionally, the flexible circuit board is provided with a first signal circuit, and the first collecting component is electrically connected to the battery sampling board through the first signal circuit.

[0014] Optionally, it also includes:

[0015] A temperature detection component is arranged on the flexible circuit board, and the temperature detection component is connected to the battery sampling board through the first signal line.

[0016] Optionally, a second signal circuit is provided on the second collecting member, and the bus is electrically connected to the battery sampling board through the second signal circuit.

[0017] Optionally, fuses are provided on both the first signal line and the second signal line;

[0018] And / or, an upper layer and a lower layer of the first signal circuit and the second signal circuit are both provided with an insulating layer.

[0019] Optionally, the first collecting member is a nickel sheet or a copper sheet.

[0020] Optionally, a heat rivet post is provided on the isolation plate for fixing the busbar assembly, the flexible circuit board and the battery sampling plate.

[0021] The utility model also provides a battery system, comprising:

[0022] Battery cells;

[0023] In any of the above battery signal sampling devices, the battery unit is electrically connected to a bus bar of the battery signal sampling device.

[0024] The technical solution of the utility model has the following advantages:

[0025] 1. The battery signal sampling device provided by the utility model comprises an isolation plate, a bus assembly, a flexible circuit board and a battery sampling plate. The first side surface of the isolation plate is divided into a first area and a second area along a first direction. The bus assembly is arranged on the first side surface along the first direction. The flexible circuit board is arranged in the first area. The battery sampling plate is arranged in the second area, and is electrically connected to the corresponding bus bar through the first collection member and the second collection member respectively;

[0026] By arranging the flexible circuit board and the battery sampling plate in the first area and the second area respectively, there is no need to overlap the flexible circuit board and the battery sampling plate in the vertical direction. They can be arranged adjacently on the isolation plate, thereby reducing the space occupied in the vertical direction and reducing the length of the flexible circuit board. This reduces the cost accordingly and makes assembly simpler. Multiple bus bars do not need to be connected to the flexible circuit board all at once. The bus bar in the second area is connected to the battery sampling plate through a second collection component. The second collection component is equivalent to the cooperation between the flexible circuit board and the first collection component, thereby ensuring that each component collects the voltage signal of each battery cell in the most compact condition.

[0027] 2. The battery signal sampling device provided by the utility model has a first end and a second end welded through a welding pad; the second collection piece and the bus, the second collection piece and the battery sampling plate are all welded through the welding pad. The setting of the welding pad provides electrical connection and mechanical fixation to ensure reliable connection. The welding pad provides a low-impedance and low-noise path to ensure effective transmission of signals and power and reduce signal attenuation and interference.

[0028] 3. In the battery signal sampling device provided by the utility model, the welding of the welding pad adopts ultrasonic welding or laser welding, so that the welding has higher pulling force and peeling force, thereby ensuring the reliability of the welding connection.

[0029] 4. In the battery signal sampling device provided by the utility model, the flexible circuit board is provided with a first signal circuit, the first acquisition component is electrically connected to the battery sampling board through the first signal circuit, and the first signal circuit is integrated on the flexible circuit board to transmit electrical energy and signals.

[0030] 5. The battery signal sampling device provided by the utility model also includes a temperature detection component, which is arranged on the flexible circuit board. The temperature detection component is connected to the battery sampling board through a first signal line. The temperature signal of the battery cell is transmitted to the battery sampling board through the setting of the temperature detection component to complete the collection, and the temperature signal is monitored to ensure the safety of the battery cell.

[0031] 6. In the battery signal sampling device provided by the utility model, a second signal circuit is arranged on the second acquisition component, the bus is electrically connected to the battery sampling board through the second signal circuit, and the second signal circuit is integrated on the second acquisition component, which also plays the role of transmitting electric energy and signals.

[0032] 7. In the battery signal sampling device provided by the utility model, fuses are provided on both the first signal circuit and the second signal circuit. When an abnormal current occurs in the signal circuit, the fuse can disconnect the circuit in time to protect the battery and the battery sampling board.

[0033] 8. In the battery signal sampling device provided by the utility model, the first sampling piece is a nickel sheet or a copper sheet, which has good conductivity.

[0034] 9. In the battery signal sampling device provided by the utility model, the hot riveting studs generate a high-strength connection between the two parts through the principle of heat diffusion, thereby realizing mechanical fixation and support. The hot riveting studs have the advantages of high strength, high rigidity, heat resistance and corrosion resistance.

[0035] 10. The battery system provided by the utility model includes a battery cell and a battery signal sampling device. The battery cell is electrically connected to the bus. The battery acquisition device samples the voltage signal and temperature signal of the battery cell to complete the signal monitoring of the battery cell, thereby improving the safety of the battery cell. And because the battery signal sampling device is used, any one of the advantages described above is specifically achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 This is a schematic diagram of the structure of an implementation of the battery signal sampling device provided in Example 1 of the utility model;

[0038] Figure 2 for Figure 1 Schematic diagram of the structure installed on the battery unit;

[0039] Figure 3 for Figure 1 A schematic diagram of the structure of the middle battery sampling plate and the second collection piece;

[0040] Figure 4 for Figure 1 A schematic diagram of the structure of the flexible circuit board and the first collecting member;

[0041] Figure 5 for Figure 3 Schematic diagram of the structure of the second collection component.

[0042] Description of reference numerals:

[0043] 1. Isolation plate; 2. First side; 3. Second side; 4. First area; 5. Second area; 6. Bus assembly; 7. Bus; 8. Flexible circuit board; 9. First collection piece; 10. Battery sampling plate; 11. Second collection piece; 12. Temperature detection piece; 13. Battery cell; 14. First end; 15. Second end. DETAILED DESCRIPTION

[0044] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Example 1

[0049] The battery signal sampling device provided in this embodiment is used to perform signal sampling and monitoring on battery cells in a battery system to ensure the safety of the battery cells.

[0050] like Figures 1 to 4 As shown, a specific implementation of the battery signal sampling device provided in this embodiment includes an isolation plate 1, a busbar assembly 6, a flexible circuit board 8 and a battery sampling plate 10. The isolation plate 1 has a first side surface 2 and a second side surface 3 arranged opposite to each other, and the first side surface 2 is divided into a first area 4 and a second area 5 along a first direction; the busbar assembly 6 is arranged on the first side surface 2 along the first direction, and the busbar assembly has at least one, and each of the busbar assemblies 6 includes a plurality of busbars 7; see Figure 1 The battery signal sampling device shown includes two bus assemblies 6, each bus assembly 6 includes a plurality of bus bars 7, the two bus assemblies 6 are arranged at two ends of the battery unit 13 at intervals along the second direction, and each bus assembly 6 extends along the first direction, wherein each bus bar 7 is used to connect the output terminals of adjacent battery cells. A flexible circuit board 8 is arranged in the first area 4, and the flexible circuit board 8 is electrically connected to the bus bar 7 located in the first area 4 through a first collecting piece 9; a battery sampling plate 10 is arranged in the second area 5, and the battery sampling plate 10 is electrically connected to the bus bar 7 located in the second area 5 through a second collecting piece 11, and the first end 14 of the flexible circuit board 8 is electrically connected to the second end 15 of the battery sampling plate 10. The second direction and the first direction are perpendicular to each other, and the first direction refers to the direction in which the battery cells are stacked on each other, i.e. Figure 1 The second direction refers to the length direction of the middle separator 1, and the second direction refers to the arrangement direction of the output terminals of the battery cells. Figure 1 The width direction of the middle insulation board 1.

[0051] By arranging the flexible circuit board 8 and the battery sampling plate 10 in the first area 4 and the second area 5 respectively, there is no need to overlap the flexible circuit board 8 and the battery sampling plate 10 in the vertical direction. They are arranged adjacently on the isolation plate 1, which reduces the space occupied in the vertical direction, and the length of the flexible circuit board 8 is also reduced, which correspondingly reduces the cost and makes assembly simpler; multiple bus bars 7 do not need to be connected to the flexible circuit board 8, and the bus bar 7 located in the second area 5 is connected to the battery sampling plate 10 through the second collection component 11. The second collection component 11 is equivalent to the role of the flexible circuit board 8 and the first collection component 9, which ensures that each component collects the voltage signal of each battery cell in the most compact arrangement.

[0052] Specifically, the battery sampling board 10 is a PCBA board; the isolation board 1 is made of insulating material, the size of the isolation board 1 is adapted to the size of the battery cell, the second side 3 of the isolation board 1 is in contact with the battery cell, and the bus 7 is arranged one-to-one with the battery cell of the battery cell, that is, a part of the bus 7 is located in the first area 4, and the other part of the bus 7 is located in the second area 5; the isolation board 1 is provided with a through groove corresponding to the output terminal of the battery cell, and after the output terminal extends to the first side 2 of the isolation board 1 through the through groove, the bus 7 is electrically connected to the output terminal of the battery cell, which can be connected by welding or other fixed methods.

[0053] Specifically, the second collecting piece 11 is a sheet structure, and the bus assembly 6 has two spaced-apart components. The flexible circuit board 8 and the battery sampling plate 10 are sequentially arranged between the two bus assemblies 6, and the width dimensions of the flexible circuit board 8 and the battery sampling plate 10 are consistent, and the sum of their length dimensions is adapted to the length of the bus assembly 6, so that the overall structure is more compact and occupies less space.

[0054] like Figure 3 and Figure 4 As shown, in the battery signal sampling device provided in this embodiment, the first end 14 and the second end 15 are welded through a pad; the second acquisition member 11 and the bus bar 7, the second acquisition member 11 and the battery sampling board 10 are all welded through a pad. The setting of the pad provides electrical connection and mechanical fixation to ensure reliable connection, and the pad provides a low impedance and low noise path to ensure effective transmission of signals and power and reduce signal attenuation and interference.

[0055] Specifically, welding pads are provided on the first end 14, the second end 15, both ends of the second collecting member 11, the bus 7, and the battery sampling plate 10. The welding pads can be attached to the plate. The welding pads can be round, square or rectangular. The corresponding welding pads are welded to complete the connection.

[0056] In the battery signal sampling device provided in this embodiment, the welding of the welding pad adopts ultrasonic welding or laser welding, so that the welding has higher pulling force and peeling force, thereby ensuring the reliability of the welding connection.

[0057] In the battery signal sampling device provided in this embodiment, the flexible circuit board 8 is provided with a first signal circuit, and the first acquisition component 9 is electrically connected to the battery sampling board 10 through the first signal circuit. By integrating and packaging the first signal circuit inside the flexible circuit board 8, the function of transmitting electric energy and signals is achieved.

[0058] like Figure 5As shown, in the battery signal sampling device provided in this embodiment, a second signal circuit is arranged on the second acquisition component 11, and the bus 7 is electrically connected to the battery sampling board 10 through the second signal circuit, and is integrated and packaged inside the second acquisition component 11 through the second signal circuit, which also plays the role of transmitting electric energy and signals.

[0059] like Figure 1 and Figure 4 As shown, the battery signal sampling device provided in this embodiment further includes a temperature detection component 12, which is arranged on the flexible circuit board 8, and the temperature detection component 12 is connected to the battery sampling board 10 through the first signal line. The temperature signal of the battery cell is transmitted to the battery sampling board 10 through the setting of the temperature detection component 12 to complete the collection, and the temperature signal is monitored to ensure the safety of the battery cell.

[0060] Specifically, the temperature detection component 12 is an NTC temperature sensor with high sensitivity and fast response speed. The temperature is monitored by utilizing the characteristic that the resistance value of the NTC sensor decreases rapidly as the temperature rises under a certain measurement power. The detection end of the temperature detection component 12 contacts the battery unit after passing through the flexible circuit board 8 and the isolation plate 1. Generally, several battery cells are selected for temperature detection. A specific method is to select one battery cell in each of the two rows for detection.

[0061] In the battery signal sampling device provided in this embodiment, fuses are provided on both the first signal line and the second signal line. When an abnormal current occurs in the signal line, the fuse can promptly disconnect the circuit to protect the battery and the battery sampling board 10. Specifically, the fuse can be a fuse or other parts with the same protection function.

[0062] In the battery signal sampling device provided in this embodiment, the upper and lower layers of the flexible circuit board 8 are both provided with insulating layers for insulating and protecting the first signal line, and the lower two layers of the second acquisition member 11 are both provided with insulating layers for insulating and protecting the second signal line. The insulating layers are used for electrical isolation and circuit protection, and also increase the mechanical strength of the flexible circuit board 8 and the second acquisition member 11, providing structural support and stability. Specifically, the insulating layer can be an insulating PI film.

[0063] In the battery signal sampling device provided in this embodiment, the first sampling member 9 is a nickel sheet or a copper sheet, which has good electrical conductivity.

[0064] In the battery signal sampling device provided in this embodiment, the isolation plate 1 is provided with a heat rivet post for fixing the busbar 7, the flexible circuit board 8 and the battery sampling plate 10. The heat rivet post generates a high-strength connection between the two parts through the principle of heat diffusion, thereby achieving mechanical fixation and support. The heat rivet post has the advantages of high strength, high rigidity, heat resistance and corrosion resistance.

[0065] Specifically, the bus 7, the flexible circuit board 8 and the battery sampling plate 10 are provided with heat riveting holes. There are multiple heat riveting holes, which can be arranged at intervals along the length direction of the flexible circuit board 8. The heat riveting holes and the heat riveting columns are fixed by heat riveting.

[0066] Example 2

[0067] like Figure 1 and Figure 2 As shown, a specific implementation of the battery system provided in this embodiment includes a battery cell 13 and the battery signal sampling device described in Example 1, and the battery cell 13 is electrically connected to the bus 7. The battery sampling device samples the voltage signal and temperature signal of the battery cell to complete the signal monitoring of the battery cell, thereby improving the safety of the battery cell.

[0068] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A battery signal sampling device, characterized in that: include: An isolation plate (1) having a first side surface (2) and a second side surface (3) disposed opposite to each other, wherein the first side surface (2) is divided into a first area (4) and a second area (5) along a first direction; A busbar assembly (6) is arranged on the first side surface (2) along a first direction, the busbar assembly having at least one, and each of the busbar assemblies (6) comprises a plurality of busbars (7); A flexible circuit board (8) is arranged in the first area (4), and the flexible circuit board (8) is electrically connected to the bus bar (7) located in the first area (4) through a first collecting member (9); A battery sampling plate (10) is arranged in the second area (5); the battery sampling plate (10) is electrically connected to the bus bar (7) located in the second area (5) through a second collecting member (11); and the first end (14) of the flexible circuit board (8) is electrically connected to the second end (15) of the battery sampling plate (10).

2. The battery signal sampling device according to claim 1, characterized in that: The first end (14) and the second end (15) are welded via a welding pad; the second collecting piece (11) and the bus bar (7), and the second collecting piece (11) and the battery sampling plate (10) are all welded via a welding pad.

3. The battery signal sampling device according to claim 2, characterized in that: The welding of the pads is carried out by ultrasonic welding or laser welding.

4. The battery signal sampling device according to claim 1, characterized in that: The flexible circuit board (8) is provided with a first signal circuit, and the first collecting component (9) is electrically connected to the battery sampling plate (10) via the first signal circuit.

5. The battery signal sampling device according to claim 4, characterized in that: Also includes: A temperature detection component (12) is arranged on the flexible circuit board (8), and the temperature detection component (12) is connected to the battery sampling board (10) via the first signal line.

6. The battery signal sampling device according to claim 4, characterized in that: The second collecting member (11) is provided with a second signal circuit, and the bus (7) is electrically connected to the battery sampling plate (10) via the second signal circuit.

7. The battery signal sampling device according to claim 6, characterized in that: Fuses are provided on both the first signal line and the second signal line; And / or, an upper layer and a lower layer of the first signal circuit and the second signal circuit are both provided with an insulating layer.

8. The battery signal sampling device according to any one of claims 1 to 7, characterized in that: The first collecting member (9) is a nickel sheet or a copper sheet.

9. The battery signal sampling device according to any one of claims 1 to 7, characterized in that: The isolation plate (1) is provided with heat riveting posts for fixing the busbar (7), the flexible circuit board (8) and the battery sampling plate (10).

10. A battery system, characterized in that: include: Battery unit (13); The battery signal sampling device according to any one of claims 1 to 9, wherein the battery unit (13) is electrically connected to a bus (7) of the battery signal sampling device.

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