Battery module acquisition assembly, battery module and battery pack

Abstract

The utility model provides a kind of battery module acquisition subassembly, battery module and battery package, belong to new energy technology field.Battery module acquisition subassembly includes circuit board, metal acquisition sheet, temperature sensor and acquisition wire harness, wherein the circuit board is used to be electrically connected with the battery module's bar sheet, voltage sampling area, temperature sampling area are provided on the circuit board, and wire harness welding area electrically connected with the voltage sampling area and / or the temperature sampling area;The metal acquisition sheet is used to be electrically connected with the bar sheet, and the metal acquisition sheet is locally arranged on the voltage sampling area;The temperature sensor is arranged on the temperature sampling area;The acquisition wire harness is arranged on the wire harness welding area, for being electrically connected with battery management system.The above structure can realize the real-time monitoring of battery module voltage and temperature, so as to facilitate ensuring the safety of battery module;And the above structure is simple, conducive to reducing the cost of battery module acquisition subassembly.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a battery module acquisition component, a battery module and a battery pack. Background Technology

[0002] In related technologies, an integrated acquisition busbar (CCS (Cells Contact System)) is typically used to sample the temperature and voltage of the battery cells. The integrated acquisition busbar mainly consists of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural parts, and copper / aluminum busbars, which are connected into a whole through processes such as hot pressing or riveting. It is used in new energy vehicles and energy storage battery modules to realize high-voltage series and parallel connection of battery cells, as well as temperature and voltage sampling functions.

[0003] Among them, due to the significant differences in the design of different battery modules (such as the number of cells, arrangement, voltage level, etc.), the plastic structural components of the integrated acquisition busbar need to be redesigned according to specific requirements, resulting in poor flexibility and high cost of the acquisition busbar.

[0004] Therefore, a new solution is needed to address the aforementioned technical problems. Utility Model Content

[0005] This utility model provides a battery module acquisition component, a battery module, and a battery pack to solve the technical problem of high cost when using integrated acquisition busbars to acquire cell voltage and temperature.

[0006] This utility model provides a battery module data acquisition component, which includes a circuit board, a metal acquisition plate, a temperature sensor, and a data acquisition harness. The circuit board is used for electrical connection to the battery module's contact plate. The circuit board has a voltage sampling area, a temperature sampling area, and a wiring harness welding area electrically connected to the voltage sampling area and / or the temperature sampling area. The temperature sampling area is in contact with the contact plate. The metal acquisition plate is used for electrical connection to the contact plate, and is partially disposed on the voltage sampling area. The temperature sensor is disposed on the temperature sampling area. The data acquisition harness is disposed on the wiring harness welding area and is used for electrical connection to a battery management system.

[0007] In one embodiment of the present invention, the wire harness soldering area is provided with at least two pads, each pad being electrically connected to the voltage sampling area or the temperature sampling area; the acquisition wire harness includes at least two wire harnesses, and each pad is electrically connected to one of the wire harnesses; and / or, at least a gap is provided between two adjacent pads on the circuit board.

[0008] In one embodiment of the present invention, the metal collection piece includes a first connecting part and a second connecting part connected to each other. The second connecting part is parallel to the first connecting part and the two are staggered in height. The second connecting part extends in a direction away from the first connecting part and is pressed onto the circuit board. A stepped structure is formed at the junction of the first connecting part and the second connecting part.

[0009] In one embodiment of the present invention, a U-shaped frame is provided on the metal collecting plate, the U-shaped frame is located at the junction of the metal collecting plate and the circuit board, and the temperature sensor is located inside the U-shaped frame; the U-shaped frame of the metal collecting plate has two anti-overflow rubber plates arranged opposite to each other, the tops of the two anti-overflow rubber plates are bent towards each other, and the temperature sensor is located between the two anti-overflow rubber plates.

[0010] This utility model also provides a battery module, the battery module including a battery plate and a battery module acquisition component as described in any of the above, the battery module acquisition component being connected to the battery plate, and a positioning component being provided between the battery plate and the battery module acquisition component.

[0011] In one embodiment of the present invention, the positioning component includes an opening disposed on the battery plate and an elastic limiting part disposed on the metal collection plate. The elastic limiting part is inserted into the opening to position the battery module collection component on the battery plate.

[0012] In one embodiment of the present invention, the elastic limiting part is located at the end of the metal collecting piece away from the circuit board, and the elastic limiting part is configured as a U-shaped structure, with the two side walls of the U-shaped structure abutting against the inner side wall of the opening.

[0013] In one embodiment of the present invention, the positioning component includes an annular groove disposed on the battery pack and an annular structure on a circuit board adapted to the annular groove. The circuit board is embedded in the annular groove to position the battery module acquisition component on the battery pack.

[0014] In one embodiment of this utility model, thermally conductive adhesive is provided between the circuit board and the plate.

[0015] This utility model also provides a battery pack, which includes the battery module described in any of the above claims.

[0016] The beneficial effects of this utility model are as follows: This utility model proposes a battery module acquisition component, a battery module, and a battery pack. The battery module acquisition component comprises a voltage sampling area, a temperature sampling area, and a wire harness welding area electrically connected to the voltage and / or temperature sampling areas on a circuit board. The circuit board is electrically connected to the battery cell plate of the battery module, and the temperature sampling area contacts the battery cell plate to transfer heat from the battery cell plate to the temperature sampling area of ​​the circuit board. A metal acquisition piece is electrically connected to the battery cell plate, and the metal acquisition piece is partially disposed on the voltage sampling area, enabling the circuit board to acquire the voltage signal of the battery cell connected to the battery cell plate. A temperature sensor is disposed in the temperature sampling area, enabling the circuit board to acquire the temperature signal of the battery cell connected to the battery cell plate. The acquisition wire harness is disposed on the wire harness welding area and is electrically connected to the battery management system to transmit the voltage and temperature signals of the battery module to the battery management system, realizing real-time monitoring of the battery module voltage and temperature, thereby helping to ensure the safety of the battery module. Furthermore, the above structure is simple, which helps to reduce the processing cost of the battery module acquisition component. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] In the attached diagram:

[0019] Figure 1 This is a battery module data acquisition component provided in one embodiment of the present invention;

[0020] Figure 2 This is a metal collection plate provided in one embodiment of the present invention;

[0021] Figure 3 This is a battery module provided in one embodiment of the present invention;

[0022] Figure 4 This is a partial view of a battery module provided in one embodiment of the present invention;

[0023] Figure 5 yes Figure 4 A magnified view of part A in the middle;

[0024] Figure 6 This is a partial view of the battery module provided in another embodiment of the present invention;

[0025] Figure 7 yes Figure 6 A cross-sectional view.

[0026] The attached figures are labeled as follows:

[0027] 1-Circuit board; 11-Solder pad; 12-Notch;

[0028] 2-Metal collecting plate; 21-First connecting part; 22-Second connecting part; 23-U-shaped frame; 24-Anti-overflow adhesive plate; 25-U-shaped structure;

[0029] 3-Temperature sensor;

[0030] 4-Data acquisition harness;

[0031] 5-Bar plate; 51-Opening; 52-Annular groove. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0035] Please see Figure 1 , Figure 1 The battery module acquisition component provided in one embodiment of this utility model includes a circuit board 1, a metal acquisition plate 2, a temperature sensor 3, and an acquisition harness 4. Both the circuit board 1 and the metal acquisition plate 2 are used for electrical connection with the battery module's contact plate (not shown). The temperature on the contact plate is transferred to the circuit board 1 via heat transfer, and the voltage on the contact plate is transferred to the metal acquisition plate 2.

[0036] The circuit board 1 is provided with a voltage sampling area, a temperature sampling area, and a wire harness soldering area. The wire harness soldering area is electrically connected to either the voltage sampling area or the temperature sampling area, or the wire harness soldering area is electrically connected to both the voltage sampling area and the temperature sampling area.

[0037] A metal sampling plate 2 is partially disposed in the voltage sampling area of ​​the circuit board 1. The metal sampling plate 2 transmits the voltage of the battery cell to the voltage sampling area of ​​the circuit board 1, enabling the circuit board 1 to acquire the voltage signal of the battery cell connected to the battery cell. The temperature sampling area of ​​the circuit board 1 is in contact with the battery cell, allowing the temperature sampling area to acquire the temperature of the battery cell. A temperature sensor 3 is installed in the temperature sampling area of ​​the circuit board 1 to detect the temperature transmitted from the battery cell to the circuit board 1. Because the temperature sensor 3 is located in the temperature sampling area of ​​the circuit board 1, the circuit board 1 acquires the temperature signal of the battery cell connected to the battery cell. Through this structural arrangement, the circuit board 1 can simultaneously acquire both the voltage and temperature signals of the battery cell.

[0038] Furthermore, the wiring harness soldering area of ​​circuit board 1 is equipped with a data acquisition harness 4. This harness 4 transmits the voltage and temperature signals of the battery cells acquired by circuit board 1 to the battery management system, enabling real-time monitoring of the battery module's voltage and temperature, thus helping to ensure the safety of the battery module. Moreover, the above structure is simple, which helps reduce the processing cost of the battery module's data acquisition components.

[0039] For example, the circuit board 1 may include, but is not limited to, a PCB, FPC, etc. The metal collection piece 2 may include, but is not limited to, a metal piece such as a nickel piece, a copper piece, or an aluminum piece.

[0040] In one example, temperature sensor 3 is configured as an NTC sensor, and the NTC sensor is mounted to the temperature sampling area of ​​circuit board 1 using a surface mount method. It should be noted that, in order to improve the connection strength between the NTC sensor and the temperature sampling area of ​​circuit board 1, the NTC sensor and the temperature sampling area can be fixed by reflow soldering.

[0041] In some embodiments, the wire harness soldering area is provided with at least two pads 11, each pad 11 being electrically connected to a voltage sampling area or a temperature sampling area of ​​the circuit board 1, thereby achieving electrical connection between the pad 11 and the voltage sampling area or the temperature sampling area. For example, when two pads 11 are provided, one pad 11 is electrically connected to the voltage sampling area, and the other pad 11 is electrically connected to the temperature sampling area. When three pads 11 are provided, one pad 11 may be electrically connected to the voltage sampling area, and the other two pads 11 may both be electrically connected to the temperature sampling area.

[0042] The acquisition harness 4 includes at least two harnesses, and each pad 11 is electrically connected to a harness, that is, a harness is soldered to a pad 11, so that the harness can transmit either a voltage signal or a temperature signal.

[0043] In some embodiments, to prevent the spacing between two adjacent pads 11 on the circuit board 1 from being too close, which would cause the two adjacent wire harnesses to be soldered together during the soldering process, at least a gap 12 is provided between two adjacent pads 11.

[0044] In one example, the notch 12 may be provided only between two adjacent pads 11 electrically connected to the temperature sampling area, or only between two adjacent pads 11 electrically connected to the voltage sampling area, or between two adjacent pads 11 electrically connected to the voltage sampling area and the temperature sampling area respectively, or the notch 12 may be provided between all two adjacent pads 11.

[0045] In some embodiments, with the metal collection piece 2 connected to the circuit board 1, in order to ensure that the metal collection piece 2 and the circuit board 1 are basically on the same horizontal plane, a stepped structure is provided on the side of the metal collection piece 2 near the circuit board 1 to form a space for accommodating the circuit board 1.

[0046] Please see Figure 2 In one example, the metal collecting plate 2 includes a first connecting portion 21 and a second connecting portion 22 connected together. The first connecting portion 21 and the second connecting portion 22 are arranged parallel to each other and staggered in height. The second connecting portion 22 extends away from the first connecting portion 21, forming a stepped structure at the junction of the first connecting portion 21 and the second connecting portion 22. Exemplarily, when the metal collecting plate 2 and the circuit board 1 are connected, the circuit board 1 can abut against the stepped structure to limit the relative position between the circuit board 1 and the metal collecting plate 2. Furthermore, the second connecting portion 22 is pressed onto the circuit board 1, and the two are fixed together by welding or other methods, so that the metal collecting plate 2 and the circuit board 1 are connected as a single unit.

[0047] In one example, in order for the second connecting portion 22 to be pressed firmly onto the circuit board 1, the height of the stepped structure formed by the first connecting portion 21 and the second connecting portion 22 is less than or equal to the thickness of the circuit board 1, and the height difference between the two can be between 0 and 1 mm.

[0048] In some embodiments, a U-shaped frame 23 is provided on the metal collection plate 2, which is located at the junction of the metal collection plate 2 and the circuit board 1, and the temperature sensor 3 is located inside the U-shaped frame 23. When the temperature on the battery is transferred to the metal collection plate 2 by heat conduction, the four inner sidewalls of the U-shaped frame 23 of the metal collection plate 2 transfer the temperature on the metal collection plate 2 to the temperature sensor 3, so that the temperature sensor 3 can more accurately detect the temperature of the battery cell.

[0049] In some embodiments, to achieve insulation protection for the temperature sensor 3, the outer surface of the temperature sensor 3 and the areas of the temperature sampling area not connected to the temperature sensor 3 are coated with insulating adhesive. It should be noted that the coating area of ​​the insulating adhesive is limited to the U-shaped frame 23 of the metal sampling piece 2.

[0050] In one example, to prevent the insulating adhesive from overflowing within the U-shaped frame 23, the metal collecting plate 2 has two anti-overflow plates 24 positioned opposite each other at the U-shaped frame 23. It should be noted that the anti-overflow plates 24 extend away from the circuit board 1 and are positioned perpendicular to or at an angle to the metal collecting plate 2, with the tops of the two anti-overflow plates 24 bent towards each other. The temperature sensor 3 is located between the two anti-overflow plates 24. Exemplarily, the metal collecting plate 2 is integrally formed with the two anti-overflow plates 24.

[0051] Please see Figure 3 , Figure 3 A battery module provided in one embodiment of the present invention includes a battery plate 5 and the aforementioned battery module acquisition component, wherein the battery module acquisition component is connected to the battery plate 5. During installation, to facilitate the use of automated equipment to install the battery module acquisition component onto the battery plate 5, a positioning component is provided between the battery plate 5 and the battery module acquisition component to position their relative positions before they are fully fixed.

[0052] Please see Figure 4 and Figure 5 In some embodiments, the positioning component includes an opening 51 on the battery module 5 and an elastic limiting portion on the metal collecting plate 2. The elastic limiting portion is inserted into the opening 51 to position the battery module collecting component on the battery module 5 so that the automated equipment can perform subsequent fixing operations.

[0053] Please see Figure 2 and Figure 5 In one example, the elastic limiting part is located at the end of the metal collection piece 2 away from the circuit board 1, and the elastic limiting part is configured as a U-shaped structure 25. When the elastic limiting part is inserted into the opening 51, the two opposite side walls of the U-shaped structure 25 abut against the inner side wall of the opening 51 to position the battery module collection assembly on the battery piece 5.

[0054] For example, after the battery module acquisition component is positioned on the plate 5, the metal acquisition piece 2 is fixed on the plate 5 by welding or other means.

[0055] Please see Figure 6 and Figure 7 In other embodiments, the positioning component includes an annular groove 52 disposed on the battery pack 5 and an annular structure on the circuit board 1 adapted to the annular groove 52. The circuit board 1 is embedded in the annular groove 52 to position the battery module acquisition component on the battery pack 5. It should be noted that the metal acquisition piece 2 disposed on the circuit board 1 is connected to the protruding portion in the middle of the annular groove 52 of the battery pack 5 so that the metal acquisition piece 2 can acquire the voltage of the battery pack 5.

[0056] In some embodiments, thermally conductive adhesive is provided between the circuit board 1 and the electrode 5 to improve the thermal conductivity. Simultaneously, the thermally conductive adhesive also secures the circuit board 1 and the electrode 5 together.

[0057] One embodiment of this utility model provides a battery pack, which includes the battery module described above.

[0058] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery module data acquisition component, characterized in that, include: A circuit board for electrical connection with the battery module's battery pads. The circuit board is provided with a voltage sampling area, a temperature sampling area, and a wire harness welding area electrically connected to the voltage sampling area and / or the temperature sampling area. The temperature sampling area is in contact with the battery pads. A metal sampling plate is used for electrical connection with the voltage sampling plate, and the metal sampling plate is partially disposed on the voltage sampling area; A temperature sensor is installed in the temperature sampling area; A data acquisition harness is installed on the welding area of ​​the harness for electrical connection with the battery management system.

2. The battery module acquisition component according to claim 1, characterized in that: The wire harness soldering area is provided with at least two pads, each pad being electrically connected to the voltage sampling area or the temperature sampling area; the acquisition wire harness includes at least two wire harnesses, and each pad is electrically connected to one of the wire harnesses; and / or, at least a gap is provided between two adjacent pads on the circuit board.

3. The battery module acquisition component according to claim 1, characterized in that: The metal collection piece includes a first connecting part and a second connecting part connected to each other. The second connecting part is parallel to the first connecting part and the two are staggered in height. The second connecting part extends in a direction away from the first connecting part and is pressed onto the circuit board. The junction of the first connecting part and the second connecting part forms a stepped structure.

4. The battery module acquisition component according to any one of claims 1-3, characterized in that: The metal collecting plate is provided with a U-shaped frame, which is located at the junction of the metal collecting plate and the circuit board, and the temperature sensor is located inside the U-shaped frame; the metal collecting plate has two anti-overflow rubber plates arranged opposite each other at the U-shaped frame, the tops of the two anti-overflow rubber plates are bent towards each other, and the temperature sensor is located between the two anti-overflow rubber plates.

5. A battery module, characterized in that: It includes a battery pack and a battery module acquisition component as described in any one of claims 1-4, wherein the battery module acquisition component is connected to the battery pack, and a positioning component is provided between the battery pack and the battery module acquisition component.

6. The battery module according to claim 5, characterized in that: The positioning component includes an opening on the battery pack and an elastic limiting part on the metal collection plate. The elastic limiting part is inserted into the opening to position the battery module collection component on the battery pack.

7. The battery module according to claim 6, characterized in that: The elastic limiting part is located at the end of the metal collection piece away from the circuit board, and the elastic limiting part is configured as a U-shaped structure, with the two side walls of the U-shaped structure abutting against the inner side wall of the opening.

8. The battery module according to claim 5, characterized in that: The positioning component includes an annular groove disposed on the battery pack and an annular structure on a circuit board that is adapted to the annular groove. The circuit board is embedded in the annular groove to position the battery module acquisition component on the battery pack.

9. The battery module according to claim 5, characterized in that: Thermally conductive adhesive is applied between the circuit board and the plate.

10. A battery pack, characterized in that: The battery pack includes the battery module as described in any one of claims 5-9.

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