Acquisition circuit board and battery module

Abstract

The utility model relates to the technical field of batteries, in particular to an acquisition circuit board and a battery module. The acquisition circuit board comprises a PCB body, an output-stage electric connecting piece and a sampling electric connecting piece, the PCB body is provided with an accommodating hole, the output-stage electric connecting piece is used for being in welded connection with a corresponding tab and electrically connected with the outside, and the sampling electric connecting piece is used for being in welded connection with a corresponding tab and electrically connected with the outside. The thickness of the output-stage electric connecting piece is larger than that of the sampling electric connecting piece, and the output-stage electric connecting piece is at least partially embedded into the containing hole. According to the acquisition circuit board, the output-stage electric connecting piece is at least partially embedded into the accommodating hole, so that the end surface of the output-stage electric connecting piece, which is welded with the tab, is prevented from excessively protruding out of the end surface of the PCB body, and the tab can be conveniently and uniformly bent and rolled to be flat subsequently. According to the battery module provided by the utility model, the voltage of the battery cell is acquired by applying the acquisition circuit board, so that the battery module is more convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a collection circuit board and a battery module. Background Art

[0002] In the prior art, in order to ensure the normal operation of the battery module, a data acquisition circuit board is usually provided in the battery module, and the voltage of the battery cell is collected by the data acquisition circuit board, so as to monitor the working status of the battery cell in real time.

[0003] The existing collection circuit board includes a PCB board (printed circuit board, Printcd Circuit Board), an output-level electrical connector and a sampling electrical connector, wherein the output-level electrical connector and the sampling electrical connector are both welded and connected to the PCB board, and the output-level electrical connector and the sampling electrical connector are respectively welded and connected to the pole ears of the corresponding battery cells in the battery module, so as to realize the collection and output of the voltage of the battery cells. When the output-level electrical connector and the sampling electrical connector are welded and connected to the pole ears, the pole ears need to be passed through the PCB board, and then the pole ears that are passed through are uniformly bent and rolled flat, and then the bent pole ears are welded to the end face of the output-level electrical connector or the end face of the sampling electrical connector. Since the output-stage electrical connector has an overcurrent requirement, while the sampling electrical connector has no overcurrent requirement, the thickness of the output-stage electrical connector is much greater than that of the sampling electrical connector. When the output-stage electrical connector and the sampling electrical connector are welded to the PCB board, the end surface where the output-stage electrical connector is welded to the pole tab will be much higher than the end surface where the sampling electrical connector is welded to the pole tab, which is not conducive to the subsequent unified bending and rolling operations of the pole tab, and increases the difficulty of assembling the entire battery module.

[0004] Therefore, there is an urgent need for a collection circuit board and a battery module to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a collection circuit board and a battery module, which are convenient for subsequent unified bending and rolling operations of the pole ears, and convenient for assembling and assembling the battery module.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A collection circuit board, comprising:

[0008] A PCB board body, wherein the PCB board body is provided with a receiving hole;

[0009] An output-stage electrical connector and a sampling electrical connector, wherein the output-stage electrical connector is used for welding and connecting with the corresponding pole tab and electrically connecting with the outside, and the sampling electrical connector is used for welding and connecting with the corresponding pole tab;

[0010] The thickness of the output-stage electrical connector is greater than the thickness of the sampling electrical connector, and the output-stage electrical connector is at least partially embedded in the accommodating hole.

[0011] As an optional solution, the acquisition circuit board includes a plurality of the sampling electrical connectors, and the plurality of the sampling electrical connectors are all welded to the PCB board body, each of the sampling electrical connectors is used to be welded to the corresponding pole ear, and the end surface of the output stage electrical connector welded to the pole ear is not higher than the end surface of the sampling electrical connector welded to the pole ear.

[0012] As an optional solution, the end surface where the output stage electrical connector is welded to the pole tab is flush with the end surface where the sampling electrical connector is welded to the pole tab.

[0013] As an optional solution, the output-stage electrical connector and the accommodating hole are in interference fit, and the output-stage electrical connector is welded to a pad on a hole wall of the accommodating hole.

[0014] As an optional solution, a portion of the hole wall of the accommodating hole where the pad is provided is provided with a sawtooth structure;

[0015] Alternatively, the sawtooth structure is provided on an outer side wall where the output stage electrical connector is welded to the pad.

[0016] As an optional solution, an avoidance hole is formed between a portion of the outer side wall of the output stage electrical connector and the hole wall of the accommodating hole, and the avoidance hole is used for the tab welded to the output stage electrical connector to pass through.

[0017] As an optional solution, the output stage electrical connector includes:

[0018] an output-stage electrical connection body, the output-stage electrical connection body being located in the accommodating hole and welded to a pad on a hole wall of the accommodating hole, the output-stage electrical connection body being welded to the tab; and

[0019] A positioning lap plate is connected to the output stage electrical connection body, and the positioning lap plate is lapped on the end surface of the PCB board body.

[0020] As an optional solution, a through hole is opened on the PCB board body, and the through hole is used for the electrode ear welded to the sampling electrical connector to pass through.

[0021] As an optional solution, the output-stage electrical connector is an output-stage copper busbar;

[0022] The sampling electrical connecting piece is a sampling copper sheet.

[0023] A battery module comprises a plurality of battery cells and the above-mentioned collection circuit board, wherein the collection circuit board is welded to the tabs of the battery cells.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a collection circuit board, which includes a PCB board body, an output-level electrical connector and a sampling electrical connector, wherein a receiving hole is provided on the PCB board body, the output-level electrical connector is used to be welded and connected to the corresponding pole ear and electrically connected to the outside, the sampling electrical connector is used to be welded and connected to the corresponding pole ear, the thickness of the output-level electrical connector is greater than the thickness of the sampling electrical connector, and the output-level electrical connector is at least partially embedded in the receiving hole. The collection circuit board provided by the utility model avoids the end face of the output-level electrical connector for welding with the pole ear from excessively protruding from the end face of the PCB board body by at least partially embedding the output-level electrical connector in the receiving hole, so as to facilitate the subsequent unified bending and rolling operations of the pole ear, and make the operation convenient.

[0026] The utility model also provides a battery module, which collects the voltage of the battery cell by applying the above-mentioned collection circuit board, so as to facilitate the subsequent unified bending and rolling operations of the pole ears, thereby making it easier to assemble the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a top view of the acquisition circuit board provided in the first embodiment of the utility model;

[0028] Figure 2 This is an axonometric diagram of the acquisition circuit board provided in the first embodiment of the utility model;

[0029] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0030] Figure 4 This is a front view of a partial structure of a collection circuit board provided in the first embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of the output-stage electrical connector provided in the first embodiment of the utility model;

[0032] Figure 6 It is a top view of the local structure of the acquisition circuit board provided in the second embodiment of the utility model.

[0033] In the figure:

[0034] 1. PCB board body; 11. Accommodation hole; 12. Avoidance hole; 13. Through hole;

[0035] 2. Output stage electrical connector; 21. Output stage electrical connector body; 211. Sawtooth structure; 22. Positioning lap plate; 23. Output pole;

[0036] 3. Sampling electrical connectors. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Embodiment 1

[0042] The existing acquisition circuit board includes a PCB board, an output-level electrical connector and a sampling electrical connector, wherein the output-level electrical connector and the sampling electrical connector are both welded and connected to the PCB board, and the output-level electrical connector and the sampling electrical connector are respectively welded and connected to the pole ears of the corresponding battery cells in the battery module, so as to realize the acquisition and output of the voltage of the battery cells. When the output-level electrical connector and the sampling electrical connector are welded and connected to the pole ears, the pole ears need to be passed through the PCB board, and then the pole ears that are passed through are uniformly bent and rolled flat, and then the bent pole ears are welded to the end face of the output-level electrical connector or the end face of the sampling electrical connector. Since the output-stage electrical connector has an overcurrent requirement, while the sampling electrical connector has no overcurrent requirement, the thickness of the output-stage electrical connector is much greater than that of the sampling electrical connector. When the output-stage electrical connector and the sampling electrical connector are welded to the PCB board, the end surface where the output-stage electrical connector is welded to the pole tab will be much higher than the end surface where the sampling electrical connector is welded to the pole tab, which is not conducive to the subsequent unified bending and rolling operations of the pole tab, and increases the difficulty of assembling the entire battery module.

[0043] In order to solve the above problems, Figure 1 to Figure 3 As shown, the present embodiment provides a collection circuit board, which includes a PCB board body 1, an output-stage electrical connector 2 and a sampling electrical connector 3, wherein a receiving hole 11 is provided on the PCB board body 1, the output-stage electrical connector 2 is used to be welded and connected to the corresponding pole lug and electrically connected to the outside, the sampling electrical connector 3 is used to be welded and connected to the corresponding pole lug, the thickness of the output-stage electrical connector 2 is greater than the thickness of the sampling electrical connector 3, and the output-stage electrical connector 2 is at least partially embedded in the receiving hole 11. The collection circuit board provided in the present embodiment avoids the end face of the output-stage electrical connector 2 for welding with the pole lug from excessively protruding from the end face of the PCB board body 1 by at least partially embedding the output-stage electrical connector 2 in the receiving hole 11, so as to facilitate the subsequent unified bending and rolling operations of the pole lug, thereby making the operation convenient.

[0044] In addition, in this embodiment, the acquisition circuit board includes a plurality of sampling electrical connectors 3, and the plurality of sampling electrical connectors 3 are all welded to the PCB body 1, and each sampling electrical connector 3 is used to be welded to the corresponding pole lug, and the end surface of the output stage electrical connector 2 welded to the pole lug is not higher than the end surface of the sampling electrical connector 3 welded to the pole lug. The above arrangement avoids the end surface of the output stage electrical connector 2 welded to the pole lug being higher than the end surface of the sampling electrical connector 3 welded to the pole lug, which facilitates the subsequent unified bending and rolling operations of all the pole lugs, making the operation convenient.

[0045] It should be noted that, in the present embodiment, the output stage electrical connector 2 is welded to the pad on the hole wall of the receiving hole 11 to ensure that the acquisition circuit board can realize the acquisition and output of the voltage of the battery cell.

[0046] Optionally, in this embodiment, if Figure 4 As shown, the end surface where the output stage electrical connector 2 is welded to the pole tab is flush with the end surface where the sampling electrical connector 3 is welded to the pole tab. The above arrangement makes it easier to perform the subsequent bending and rolling operations on all the pole tabs, making the operation more convenient.

[0047] It should be noted that, in the present embodiment, the acquisition circuit board includes two output-stage electrical connectors 2, and a plurality of sampling electrical connectors 3 are located between the two output-stage electrical connectors 2. In two adjacent battery cells, the positive pole ear of one battery cell and the negative pole ear of the other battery cell are welded to the same sampling electrical connector 3 to realize the series connection of the two adjacent battery cells, and in the two battery cells located at the endmost parts, the remaining positive pole ear of one battery cell is welded to one of the output-stage electrical connectors 2, and the remaining negative pole ear of the other battery cell is welded to the other output-stage electrical connector 2, thereby realizing the series connection of each battery cell.

[0048] Optionally, in this embodiment, the output stage electrical connector 2 may be an output stage copper bar, which has the advantage of good electrical conductivity. Optionally, in this embodiment, the sampling electrical connector 3 may be a sampling copper sheet, which has the advantage of good electrical conductivity.

[0049] Optionally, in this embodiment, the surface of the output-stage copper busbar may be plated with tin or nickel, which further improves the conductivity of the output-stage copper busbar and also improves the corrosion resistance and wear resistance of the output-stage copper busbar.

[0050] Optionally, in this embodiment, the output stage electrical connector 2 is interference fit with the receiving hole 11. Since the output stage electrical connector 2 is welded to the pad on the hole wall of the receiving hole 11, the above arrangement enhances the bonding strength between the output stage electrical connector 2 and the PCB body 1 after welding.

[0051] Optionally, in this embodiment, if Figure 3 As shown, a sawtooth structure 211 is provided on the outer side wall where the output-stage electrical connector 2 is welded to the pad on the hole wall of the receiving hole 11. By providing the sawtooth structure 211, it is ensured that the output-stage electrical connector 2 and the receiving hole 11 are interference fit, which effectively increases the welding area between the output-stage electrical connector 2 and the pad, and enhances the bonding strength between the output-stage electrical connector 2 and the PCB board body 1 after welding.

[0052] It should be noted that when the output-stage electrical connector 2 and the PCB body 1 are connected by welding, soldering is performed at the gap of the sawtooth structure 211 to achieve electrical connection between the output-stage electrical connector 2 and the pads on the hole wall of the receiving hole 11. Optionally, the sawtooth structure 211 is provided on the outer wall at multiple sides of the output-stage electrical connector 2. Optionally, the sawtooth structure 211 may include 3 or 4 sawtooths, and the specific number of sawtooths in the sawtooth structure 211 is not limited in this embodiment. Optionally, in this embodiment, the sawtooth structure 211 on the outer wall of the output-stage electrical connector 2 may be formed by stamping.

[0053] It should be noted that when soldering is performed at the gap of the sawtooth structure 211, since spot welding is used, after the welding connection between the output-stage electrical connector 2 and the PCB board body 1 is completed, solder paste can be used to fill the gap between the sawtooth structure 211 and the hole wall of the accommodating hole 11 to ensure the reliability of the electrical connection between the output-stage electrical connector 2 and the PCB board body 1.

[0054] Alternatively, if Figure 1 to Figure 3 As shown, an avoidance hole 12 is formed between a part of the outer wall of the output-stage electrical connector 2 and the hole wall of the accommodating hole 11, and the avoidance hole 12 is used for the tabs welded to the output-stage electrical connector 2 to pass through. The above arrangement does not require additional holes to be formed on the PCB body 1 for the tabs welded to the output-stage electrical connector 2 to pass through, and it is more convenient to process and manufacture the PCB body 1.

[0055] In this embodiment, if Figure 1 to Figure 3 As shown, the PCB body 1 is provided with through holes 13 , and each sampling electrical connector 3 has two corresponding through holes 13 , and the through holes 13 are used for the tabs welded to the sampling electrical connector 3 to pass through.

[0056] Specifically, if Figure 1 to Figure 5 As shown, the output-stage electrical connector 2 provided in this embodiment includes an output-stage electrical connector body 21 and a positioning lap plate 22, wherein the output-stage electrical connector body 21 is located in the receiving hole 11 and is welded to the pad on the hole wall of the receiving hole 11, the output-stage electrical connector body 21 is welded to the tab, the positioning lap plate 22 is connected to the output-stage electrical connector body 21, and the positioning lap plate 22 is overlapped on the end surface of the PCB board body 1. By providing the positioning lap plate 22, it is convenient to realize the overlap of the output-stage electrical connector 2 and the PCB board body 1, realize the reliable positioning of the output-stage electrical connector 2 and the PCB board body 1, and facilitate the subsequent welding connection of the output-stage electrical connector body 21 and the PCB board body 1.

[0057] Optionally, in this embodiment, if Figure 3As shown, a plurality of positioning bridge plates 22 may be arranged at intervals on the output stage electrical connection body 21, and each positioning bridge plate 22 is located on a different side of the output stage electrical connection body 21. Figure 5 As shown, in this embodiment, a positioning bridge plate 22 may also be provided on the output stage electrical connection body 21 , and the positioning bridge plate 22 may extend around multiple side edges of the output stage electrical connection body 21 .

[0058] In addition, in this embodiment, the output stage electrical connector 2 further includes an output pole 23, and the output pole 23 is connected to the output stage electrical connector body 21. By providing the output pole 23, it is convenient for the output stage electrical connector 2 to be connected to other devices.

[0059] This embodiment also provides a battery module, which includes multiple battery cells and the above-mentioned collection circuit board. The collection circuit board is welded to the tabs of the battery cells, which can realize the series connection between the multiple battery cells, thereby realizing the collection and output of the voltage of the battery cells. The battery module provided by this embodiment uses the above-mentioned collection circuit board to facilitate the subsequent unified bending and rolling operations of the tabs, thereby making it easier to assemble the battery module. Optionally, in this embodiment, the battery module is a soft-pack battery module.

[0060] Embodiment 2

[0061] The acquisition circuit board provided in this embodiment is basically the same as that in the first embodiment. The acquisition circuit board provided in this embodiment is different from that in the first embodiment in that:

[0062] like Figure 6 As shown, in this embodiment, a serrated structure 211 is provided at a portion of the hole wall of the receiving hole 11 where the solder pad is provided, so as to ensure that the output-stage electrical connector 2 and the receiving hole 11 are interference fit, increase the soldering area between the output-stage electrical connector 2 and the solder pad, and enhance the bonding strength between the output-stage electrical connector 2 and the PCB board body 1 after soldering.

[0063] This embodiment also provides a battery module, which includes multiple battery cells and the above-mentioned collection circuit board. The collection circuit board is welded to the tabs of the battery cells, which can realize the series connection between the multiple battery cells, thereby realizing the collection and output of the voltage of the battery cells. The battery module provided by this embodiment uses the above-mentioned collection circuit board to facilitate the subsequent unified bending and rolling operations of the tabs, thereby making it easier to assemble the battery module. Optionally, in this embodiment, the battery module is a soft-pack battery module.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. 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 implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A collection circuit board, characterized in that: include: A PCB board body (1), wherein a receiving hole (11) is provided on the PCB board body (1); An output-stage electrical connector (2) and a sampling electrical connector (3), wherein the output-stage electrical connector (2) is used to be welded to a corresponding pole lug and electrically connected to the outside, and the sampling electrical connector (3) is used to be welded to a corresponding pole lug; The thickness of the output-stage electrical connector (2) is greater than the thickness of the sampling electrical connector (3), and the output-stage electrical connector (2) is at least partially embedded in the accommodating hole (11).

2. The acquisition circuit board according to claim 1, characterized in that: The acquisition circuit board comprises a plurality of sampling electrical connectors (3), and the plurality of sampling electrical connectors (3) are all welded to the PCB board body (1), and each sampling electrical connector (3) is used for welding to the corresponding pole lug, and the end surface of the output stage electrical connector (2) welded to the pole lug is not higher than the end surface of the sampling electrical connector (3) welded to the pole lug.

3. The acquisition circuit board according to claim 2, characterized in that: The end surface where the output stage electrical connector (2) is welded to the pole tab is flush with the end surface where the sampling electrical connector (3) is welded to the pole tab.

4. The acquisition circuit board according to any one of claims 1 to 3, characterized in that: The output-stage electrical connector (2) and the accommodating hole (11) are in interference fit, and the output-stage electrical connector (2) is welded to a pad on the hole wall of the accommodating hole (11).

5. The acquisition circuit board according to claim 4, characterized in that: A sawtooth structure (211) is provided at a portion of the hole wall of the accommodating hole (11) where the solder pad is provided; Alternatively, the sawtooth structure (211) is provided on an outer side wall of the output-stage electrical connector (2) that is welded to the pad.

6. The acquisition circuit board according to any one of claims 1 to 3, characterized in that: An escape hole (12) is formed between a portion of the outer side wall of the output-stage electrical connector (2) and the hole wall of the accommodating hole (11), and the escape hole (12) is used for allowing the tab welded to the output-stage electrical connector (2) to pass through.

7. The acquisition circuit board according to any one of claims 1 to 3, characterized in that: The output stage electrical connector (2) comprises: an output-stage electrical connection body (21), the output-stage electrical connection body (21) being located in the accommodating hole (11) and welded to a welding pad on the hole wall of the accommodating hole (11), the output-stage electrical connection body (21) being welded to the tab; and A positioning lap plate (22), the positioning lap plate (22) being connected to the output stage electrical connection body (21), and the positioning lap plate (22) being lapped on the end surface of the PCB board body (1).

8. The acquisition circuit board according to any one of claims 1 to 3, characterized in that: The PCB body (1) is provided with a through hole (13), and the through hole (13) is used for the tab that is welded to the sampling electrical connector (3) to pass through.

9. The acquisition circuit board according to any one of claims 1 to 3, characterized in that: The output-stage electrical connector (2) is an output-stage copper busbar; The sampling electrical connector (3) is a sampling copper sheet.

10. A battery module, characterized in that: It comprises a plurality of battery cells and a collection circuit board as claimed in any one of claims 1 to 9, wherein the collection circuit board is welded to the tabs of the battery cells.

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