Acquisition assembly, battery module and battery box

Abstract

The utility model belongs to the technical field of batteries, and discloses an acquisition assembly, a battery module and a battery box. The acquisition assembly comprises an insulating support, an acquisition wire, an FPC acquisition board and a connector, the FPC acquisition board comprises an FPC acquisition main body, a connecting part and a redundancy part, the FPC acquisition main body is fixedly connected to the top of the expansion beam, the end part of the acquisition wire is connected to the FPC acquisition main body, the connecting part is connected to the connector, two ends of the redundancy part are respectively connected to the FPC acquisition main body and the connecting part, and the connector is connected to the BMS slave board. The FPC acquisition main body is fixedly arranged on the expansion beam of the box body, so that the installation stability of the FPC acquisition board is improved, and connector pins on the FPC acquisition main board are ensured not to be broken. Besides, a redundant part in the FPC acquisition board can deform to absorb deformation of the expansion beam, so that relative displacement between the connector and the BMS slave board is prevented, and the situation of connection failure between the connector and the BMS slave board is avoided.

Description

Technical Field

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

[0002] CCS (Integrated Collection Busbar) is an integrated battery signal collection (such as temperature collection, pressure collection, current collection, etc.) and management system. The existing CCS mainly consists of a plastic bracket, a collection component and a conductive busbar (aluminum bar).

[0003] Currently, the CCS using FFC as the collection wiring mainly includes a PCB collection board, FFC collection wiring, a connector, etc. The connector and the FFC collection wiring are welded on the PCB collection board. The FFC collection wiring is connected to the connector, and the connector is connected to the BMS slave board by a direct insertion method. However, the CCS in this form has the following defects: The PCB collection board at the front end of the CCS needs to weld the connector and the collection wiring, which will cause the size of the PCB collection board to be relatively large, and it is easy to generate a large amplitude during vibration, thus causing stress concentration on the connector pins welded on the PCB collection board, and there is a risk of pin fracture and then collection failure.

[0004] Based on the above, there is an urgent need for a collection component, a battery module and a battery box to solve the problems existing in the prior art. Summary of the Utility Model

[0005] The first object of the utility model is to provide a collection component, which can solve the technical problem that the solder joints between the connector and the collection board are broken due to vibration of the current CCS collection board, resulting in collection failure.

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

[0007] A collection component is applied to a battery module. The battery module is installed in a battery box. There are a plurality of expansion beams arranged at intervals in the battery box. A space for accommodating the battery module is formed between two adjacent expansion beams. A BMS slave board is fixedly arranged on the side of the expansion beam. The collection component includes: an insulating bracket; a collection wiring installed on the insulating bracket; an FPC collection board and a connector. The FPC collection board includes an FPC collection main body, a connection part and a redundant part. The FPC collection main body is fixedly connected to the top of the expansion beam. The end of the collection wiring is electrically connected to the FPC collection main body. The connection part is connected to the connector. Both ends of the redundant part are respectively connected to the FPC collection main body and the connection part. The connector is connected to the BMS slave board.

[0008] Preferably, a piercing terminal is provided on the connecting portion, and the piercing terminal is connected to the connector.

[0009] Preferably, the acquisition trace includes a trace main body and a bending section. The trace main body is mounted on the insulating bracket, the bending section is located at the end of the trace main body, and the bending section is electrically connected to the FPC acquisition board.

[0010] Preferably, the connection method between the FPC acquisition board and the bending section includes, but is not limited to, hotbar welding, laser welding, ultrasonic welding, and resistance welding.

[0011] Preferably, a foam adhesive layer is sandwiched between the top of the FPC acquisition main body and the expansion beam.

[0012] Preferably, the acquisition trace is one of an FFC line and an FDC line.

[0013] Preferably, the acquisition trace is an FFC line.

[0014] Preferably, one end of the FPC acquisition board is provided with an acquirer, and the other end of the FPC acquisition board is provided with an acquisition socket. The acquirer is inserted into the acquisition socket on the adjacent FPC acquisition board.

[0015] The beneficial effects of the acquisition component provided by the present utility model: By fixedly arranging the FPC acquisition main body on the expansion beam of the box body, the installation stability of the FPC acquisition board can be effectively improved, the concentrated stress on the connector pins of the FPC acquisition main board is eliminated, so as to ensure that the connector pins on the FPC acquisition main board will not break, and this connection method is convenient and fast. In addition, the acquisition board made of FPC material has the characteristics of being soft, thin, and bendable, so that the acquisition board obtains the function of being deformable. When the expansion beam is bent and deformed under the action of the expansion force of the battery cell, the redundant part in the FPC acquisition board can generate deformation to absorb the deformation of the expansion beam, so that the relative distance between the connector welded on the expansion beam and the BMS daughter board will not change, preventing relative displacement between the two, and thus avoiding the situation of connection failure between the connector and the BMS daughter board, thereby preventing acquisition failure.

[0016] The second object of the present utility model is to provide a battery module, which can improve the use performance and stability of the entire battery module by using the above acquisition component.

[0017] To achieve this purpose, the present utility model adopts the following technical solutions:

[0018] A battery module, including a battery cell and the above acquisition component, and the acquisition component is electrically connected to the battery cell.

[0019] The beneficial effects of the battery module provided by the present utility model: Since the battery module includes the above-mentioned acquisition component, and the acquisition component has an FPC acquisition board fixedly connected to the expansion beam on the battery box body, it not only ensures the installation stability of the FPC acquisition board, prevents the connector pins on the FPC acquisition main body from breaking, but also when the expansion beam deforms, the redundant part in the FPC acquisition board can absorb the deformation amount, so as to keep the relative distance between the connector and the BMS slave board unchanged, making the connection between the connector and the BMS slave board stable, and further ensuring the effective acquisition of the BMS slave board, improving the service performance and stability of the entire battery module.

[0020] The third object of the present utility model is to provide a battery box, by using the above-mentioned battery module, the service life of the battery box can be extended, the number of repairs can be reduced, and the repair cost can be saved.

[0021] To achieve this purpose, the present utility model adopts the following technical solutions:

[0022] The battery box includes a box body and the above-mentioned battery module. A plurality of spaced expansion beams are provided in the box body. A space for accommodating the battery module is formed between two adjacent expansion beams. A BMS slave board is fixedly provided on the side of the expansion beam. The acquisition component in the battery module includes an FPC acquisition board. The FPC acquisition board is fixedly connected to the top of the expansion beam. The connector on the acquisition component is connected to the BMS slave board.

[0023] The beneficial effects of the battery box provided by the present utility model: The space for placing the battery module is defined in the box body by the spaced expansion beams, and the FPC acquisition board in the battery module is fixedly connected to the expansion beam. By replacing the PCB hard board with an FPC acquisition board and fixedly connecting the FPC acquisition board to the expansion beam, on the one hand, the vibration of the FPC acquisition board can be effectively reduced, and the risk of the connector pins on the FPC acquisition main body breaking due to concentrated stress is reduced. On the other hand, when the expansion beam deforms, the redundant part on the FPC acquisition board can absorb the deformation amount generated by the expansion beam, thereby ensuring the stability of the relative distance between the BMS slave board and the connector, and further ensuring the stable reliability of the connection between the connector and the BMS slave board, extending the service life of the battery box, reducing the number of repairs, and saving the repair cost. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the acquisition component provided by an embodiment of the present utility model;

[0025] Figure 2 is a front view of a partial structure of the acquisition component provided by an embodiment of the present utility model;

[0026] Figure 3 yes Figure 1 A partial enlarged view of the middle A;

[0027] Figure 4 It is a top view of the structure of two collection components provided by an embodiment of the utility model when they are switched and connected;

[0028] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle.

[0029] In the figure:

[0030] 100, BMS slave board;

[0031] 10. Collection components;

[0032] 1. Bus;

[0033] 2. Insulation bracket;

[0034] 3. Collection routing; 31. Routing body; 32. Bend section; 321. First bend; 322. Second bend;

[0035] 4. FPC acquisition board; 41. FPC acquisition body; 411. Collector; 412. Acquisition socket; 42. Connecting part; 43. Redundant part;

[0036] 5. Connector. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[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 defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] The following will introduce the acquisition component, battery module and battery box provided by the present utility model in conjunction with the drawings and specific implementation manners.

[0042] In the prior art, the battery box includes a box body and a battery module. In order to accommodate the expansion at the end of the battery module, a plurality of spaced expansion beams are provided in the box body, and a space capable of accommodating the battery module is formed between two adjacent expansion beams. The larger area surfaces of the expansion beams are oppositely arranged relative to the large surface of the battery module, so that the expansion beams can bear the expansion force of the battery module along its end direction (i.e., the normal direction of the large surface of the battery module), thereby being able to reduce the deformation generated by the battery module along its end direction. In addition, a BMS slave board 100 is fixedly arranged on the larger area surface of the expansion beam. The battery module includes battery cells and an acquisition component 10. The battery cells are electrically connected to the acquisition component 10, and the BMS slave board 100 is electrically connected to the acquisition component 10 to monitor signals such as the voltage, temperature, and current of the battery cells.

[0043] Specifically, as Figure 1As shown, the acquisition component 10 includes a bus 1, an insulating bracket 2, a collection line 3, a collection board and a connector 5. Among them, the bus 1 is installed on the insulating bracket 2, and the insulating bracket 2 is used to insulate the bus 1 and the parts of the output stage that are not electrically connected to the battery cell from the battery cell. The insulating bracket 2 can be made of a PC board, a PC+ABS board, an epoxy board, etc., and the utility model is not limited to this. The collection line 3 is installed on the insulating bracket 2, one end of the collection line 3 is electrically connected to the bus 1, and the other end is electrically connected to the acquisition board, so as to transmit the collected voltage, temperature, current and other signals of the battery cell to the FPC acquisition board 4. The existing acquisition board is usually made of a PCB hard board, and the connector 5 and the collection line 3 are welded and connected on the PCB hard board. The connector 5 is connected to the BMS slave board 100 to achieve the purpose of transmitting the signal on the battery cell to the BMS.

[0044] However, because the PCB hard board needs to be welded with the connector 5 and the acquisition line 3, the size of the PCB hard board is usually large, and it is easy to generate a large amplitude during the vibration process, causing stress concentration on the pins of the connector 5 welded on the PCB hard board, and there is a risk of pin breakage and thus acquisition failure.

[0045] In order to solve the above problems, in this embodiment, the acquisition board adopts FPC acquisition board 4, combined with Figure 1 , Figure 2 As shown, the FPC acquisition board 4 specifically includes an FPC acquisition body 41, a connecting part 42 and a redundant part 43. The FPC acquisition body 41 is fixedly connected to the top of the expansion beam, the end of the acquisition trace 3 is welded and electrically connected to the FPC acquisition body 41, the connecting part 42 is connected to the connector 5, and the two ends of the redundant part 43 are respectively connected to the FPC acquisition body 41 and the connecting part 42.

[0046] In the above setting, the FPC acquisition body 41 is fixed on the expansion beam of the box body. Since the expansion beam is mostly fixed on the box body, the expansion beam can play a buffering role when it is subjected to vibration or impact, reducing the interference of external forces on the FPC acquisition body 41, thereby suppressing the FPC acquisition body 41 from generating a large amplitude, effectively improving the installation stability of the FPC acquisition body 41, and eliminating the concentrated stress of the FPC acquisition body 41 on the connector 5 pins, thereby ensuring that the connector 5 pins on the FPC acquisition main board will not break, and this connection method is convenient and fast.

[0047] In addition, it should be further noted that in this embodiment, the redundant part 43, the connecting part 42 and the FPC acquisition main body 41 are of an integrally formed structure, and all three are made of FPC material. The acquisition board made of FPC material has the characteristics of being soft, thin and bendable, so that the redundant part 43 obtains the function of being deformable. When the expansion beam is bent and deformed under the action of the expansion force of the battery cell, the expansion beam will simultaneously drive the BMS slave board 100, the connector 5 and the connecting part 42 to move forward. At this time, the redundant part 43 can deform to absorb the deformation of the expansion beam, so that the relative distance between the connector 5 welded on the expansion beam and the BMS slave board 100 will not change, thereby preventing the relative displacement between the two, and also avoiding the connection failure between the connector 5 and the BMS slave board 100, thus preventing the acquisition failure.

[0048] More specifically, a piercing terminal is provided on the connecting part 42, and the piercing terminal is connected to the connector 5, so that the FPC acquisition board 4 can directly perform acquisition connection by inserting it into the connector 5 housing, omitting the step of welding the connector 5 to the FPC acquisition main body 41, thereby simplifying the process and reducing the production cost.

[0049] Preferably, the acquisition trace 3 is an FFC circuit. The FFC circuit has the advantages of good flexibility, thin thickness, etc., and the structure is relatively simple, and the mold cost is relatively low compared with the FPC circuit, so it has a cost advantage. Of course, in other embodiments, the acquisition trace 3 can also be an FDC circuit. Compared with the FPC circuit, the FDC circuit has fewer processing procedures, shorter processing cycle and higher efficiency, so it can effectively save the processing cost. Therefore, both the FFC circuit and the FDC circuit are within the scope of protection of the present invention.

[0050] Specifically, referring to Figure 3 As shown, the FFC circuit includes a trace main body 31 and a bending section 32. The trace main body 31 is installed on the insulating bracket 2. The bending section 32 is located at the end of the trace main body 31, and the bending section 32 is electrically connected to the FPC acquisition board 4. The side of the trace main body 31 can also be connected with an NTC component by means of a thermally conductive structural adhesive, soldering, etc. to collect the temperature information at the pole column of the battery cell; the bending section 32 includes two parts, a first bending part 321 and a second bending part 322. One end of the first bending part 321 is connected to the end of the trace main body 31, the other end of the first bending part 321 is connected to one end of the second bending part 322, and the larger area side of the first bending part 321 is attached and abutted against the end face of the insulating bracket 2, and the other end of the second bending part 322 is pressed against the FPC acquisition main body 41 and fixedly connected to the FPC acquisition main body 41. Through the above settings, the first bending part 321 in the acquisition trace 3 can absorb the displacement generated by the FPC acquisition main body 41 when the battery cell expands, so as to ensure the connection stability between the second bending part 322 and the connector 5.

[0051] Optionally, in this embodiment, the FPC collection body 41 is fixedly connected to the second bending portion 322 by hotbar welding, which has high connection strength and high efficiency, effectively saving time and labor costs. Of course, in other embodiments, the FPC collection body 41 can also be fixed to the second bending portion 322 by laser welding, ultrasonic welding, resistance welding, etc., and the utility model is not limited to this.

[0052] Optionally, a glue coating layer is sandwiched between the FPC collecting body 41 and the top of the expansion beam. For example, foam glue can be used to directly bond the FPC collecting body 41 to the top of the expansion beam, thereby eliminating the welding step between the two and improving production efficiency.

[0053] Optionally, in this embodiment, combined with Figure 4 , Figure 5 As shown, taking the battery box with two battery modules as an example, one end of the FPC collection body 41 in one collection component 10 is provided with a collector 411, and one end of the FPC collection main body in the other collection component 10 is provided with a collection socket 412, and the collector 411 can be plugged into the collection socket 412. When the BMS slave board 100 in one of the battery modules needs to collect the working information of the battery cells in another battery module, the collector 411 is directly inserted into the collection socket 412 to achieve the communication connection between the two battery modules. If a PCB hard board is used as a collection board, and a collector 411 is set on the PCB hard board, since the PCB hard board has high hardness and poor toughness, it is necessary to use an FFC line as a transfer bridge to connect the two PCB hard boards. At this time, two more welding processes will be added on each PCB hard board to weld the FFC line on the PCB hard board.

[0054] Therefore, by replacing the PCB hard board with the FPC acquisition board 4, another benefit is that it can reduce the difficulty of the acquisition definition transfer of two adjacent battery modules, significantly reduce the number of welding times, make the process flow simpler, and reduce the process requirements.

[0055] It can be understood that when more battery modules are provided in the battery box, the FPC acquisition main body 41 can be provided with both the collector 411 and the acquisition socket 412 at the same time, so as to be plugged and matched with the FPC acquisition main body 41 on the adjacent acquisition component 10. Therefore, the present utility model does not limit whether the collector 411 and the acquisition socket 412 are provided on the FPC acquisition main body 41 at the same time. The three configurations of only providing one collector 411 on the FPC acquisition main body 41, only providing one acquisition socket 412 on the FPC acquisition main body 41, and providing both the collector 411 and the acquisition socket 412 on the FPC acquisition main body 41 at the same time all fall within the scope of protection of the present utility model.

[0056] This embodiment also provides a battery module, which includes a battery cell and the above-mentioned acquisition component 10. Through holes coaxially arranged with the battery cell pole columns are formed in the insulating bracket 2, and the bus bar 1 on the acquisition component 10 is electrically connected to the battery cell pole columns through the through holes. Since the battery module includes the above-mentioned acquisition component 10, and the above-mentioned acquisition component 10 has an FPC acquisition board 4 fixedly connected to the expansion beam on the battery box body, it not only ensures the installation stability of the FPC acquisition board 4 and prevents the pins of the connector 5 on the FPC acquisition main body 41 from breaking, but also when the expansion beam deforms, the redundant part 43 in the FPC acquisition board 4 can absorb the deformation amount, so as to keep the relative distance between the connector 5 and the BMS daughter board 100 unchanged, making the connection between the connector 5 and the BMS daughter board 100 stable, and further ensuring the effective acquisition of the BMS daughter board 100, improving the service performance and stability of the entire battery module.

[0057] This embodiment also provides a battery box, which includes a box body and the above-mentioned battery module. The space for placing the battery module is defined in the box body by the expansion beams arranged at intervals, and the FPC acquisition board 4 in the battery module is fixedly connected to the expansion beam. By replacing the rigid PCB board with the FPC acquisition board 4 and fixedly connecting the FPC acquisition board 4 to the expansion beam, on the one hand, the vibration of the FPC acquisition board 4 can be effectively reduced, and the risk of the pins of the connector 5 on the FPC acquisition main body 41 breaking due to concentrated stress is reduced. On the other hand, when the expansion beam deforms, the redundant part 43 on the FPC acquisition board 4 can absorb the deformation amount generated by the expansion beam, so as to ensure the stability of the relative distance between the BMS daughter board 100 and the connector 5, and further ensure the stable reliability of the connection between the connector 5 and the BMS daughter board 100, prolonging the service life of the battery box, reducing the number of inspections, and saving the inspection cost.

[0058] In the description of this specification, the descriptions referring to the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0059] Obviously, the above embodiments of the present utility model are merely examples given for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A collection component, applied to a battery module, wherein the battery module is arranged in a battery box, wherein a plurality of expansion beams arranged at intervals are arranged in the battery box, and a space for accommodating the battery module is formed between two adjacent expansion beams, and a BMS slave plate (100) is fixedly arranged on the side of the expansion beam, characterized in that: The collection component (10) comprises: Insulation bracket (2); A collection wiring (3), wherein the collection wiring (3) is installed on the insulating support (2); An FPC acquisition board (4) and a connector (5), wherein the FPC acquisition board (4) comprises an FPC acquisition body (41), a connecting portion (42) and a redundant portion (43), wherein the FPC acquisition body (41) is fixedly connected to the top of the expansion beam, an end of the acquisition wiring (3) is electrically connected to the FPC acquisition body (41), the connecting portion (42) is connected to the connector (5), two ends of the redundant portion (43) are respectively connected to the FPC acquisition body (41) and the connecting portion (42), and the connector (5) is connected to the BMS slave board (100).

2. The collection component according to claim 1, characterized in that: The connecting portion (42) is provided with a piercing terminal, and the piercing terminal is connected to the connector (5).

3. The collection component according to claim 1, characterized in that: The acquisition wiring (3) comprises a wiring body (31) and a bending section (32); the wiring body (31) is mounted on the insulating bracket (2); the bending section (32) is located at the end of the wiring body (31); and the bending section (32) is electrically connected to the FPC acquisition board (4).

4. The collection assembly according to claim 3, characterized in that: The connection method between the FPC collection board (4) and the bending section (32) includes but is not limited to hotbar welding, laser welding, ultrasonic welding and resistance welding.

5. The collection component according to claim 1, characterized in that: A foam rubber layer is sandwiched between the FPC collecting body (41) and the top of the expansion beam.

6. The collection component according to claim 1, characterized in that: The acquisition line (3) is one of an FFC line and an FDC line.

7. The collection assembly according to claim 6, characterized in that: The acquisition line (3) is an FFC line.

8. The collection assembly according to claim 6, characterized in that: A collector (411) is provided at one end of the FPC acquisition board (4), and a collection socket (412) is provided at the other end of the FPC acquisition board (4); the collector (411) is plugged into the collection socket (412) on the adjacent FPC acquisition board (4).

9. A battery module, characterized in that: It comprises a battery cell and a collection component (10) according to any one of claims 1 to 8, wherein the collection component (10) is electrically connected to the battery cell.

10. A battery box, characterized in that: It comprises a box body and the battery module as claimed in claim 9, wherein a plurality of expansion beams arranged at intervals are arranged in the box body, a space for accommodating the battery module is formed between two adjacent expansion beams, a BMS slave board (100) is fixedly arranged on the side of the expansion beam, a collection component (10) in the battery module comprises an FPC collection board (4), the FPC collection board (4) is fixedly connected to the top of the expansion beam, and a connector (5) on the collection component (10) is connected to the BMS slave board (100).

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