Collection busbar
By using flexible flat wires and setting grounding through holes and signal through holes in the collection busbar, multiple collection devices can share wire cores, which solves the space occupation and cost problems caused by the increase in the number of wire cores in the existing technology, and improves space utilization. rate and reduced costs.
Patent Information
- Application Number
- CN202421147999.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-23
AI Technical Summary
When the number of battery cells increases, the number of wire cores doubles, resulting in a rapid increase in space occupation and material costs.
It uses a flexible flat line with multiple grounding through holes and signal through holes. The wire cores are exposed through these through holes, allowing multiple acquisition devices to share one grounding wire core and multiple signal wire cores.
It effectively reduces the usage of wires, improves the space utilization of battery modules, and reduces product costs.
Smart Images
Figure CN222381015U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy batteries, in particular to a collection busbar. Background Art
[0002] In order to improve the automation management, monitoring, and safety of new energy batteries, the collection busbar has become an essential structure for new energy batteries. The main structure of new energy batteries is the collection busbar and the battery pack. The battery pack includes multiple cells arranged and distributed. The collection busbar covers the top of the battery pack and has direct or indirect electrical connections with the positive and negative electrodes of each cell. It also has direct physical contact with the cell through the temperature sensor.
[0003] The collection busbar is connected to the battery pack. Specifically, when the collection busbar is collecting data, the collection device usually needs to be grounded and connected to the signal line. The more battery cells there are, the more wire cores there are, which rapidly increases the space occupied by the collection busbar and the material cost. Utility Model Content
[0004] In order to solve the technical problem in the prior art that the space occupied by the wire cores increases and the material cost increases as the number of electric cores doubles, one of the purposes of the utility model is to provide a data collection busbar.
[0005] One of the purposes of the utility model is achieved by the following technical solution:
[0006] A collection busbar, comprising a collection interface, a flexible flat wire, and a plurality of collection devices;
[0007] The acquisition interface is connected to the flexible flat wire and is used to output an acquisition signal;
[0008] A flexible flat wire, the flexible flat wire comprising a wire core and two insulating layers, the wire core being arranged between the two insulating layers, the wire core being connected to the acquisition interface, the wire core comprising a grounding wire core and a plurality of signal wire cores, the insulating layer being provided with a plurality of grounding through holes, the grounding through holes being distributed along the grounding wire core;
[0009] Each of the acquisition devices is arranged near the battery cell to collect battery cell information. The acquisition devices are arranged one-to-one correspondingly to each of the grounding through holes. Each of the acquisition devices is connected to the grounding core via the corresponding grounding through hole. Each of the acquisition devices is also connected to one of the signal cores.
[0010] Optionally, the collection busbar further includes a connector for connecting two adjacent battery cells;
[0011] The collecting device is arranged on the connecting piece.
[0012] Optionally, the collection device includes a temperature collection device.
[0013] Optionally, the temperature collection device includes a heat-conducting mounting seat and a temperature sensor, the heat-conducting mounting seat is arranged on the connecting member, and the temperature sensor is arranged on the heat-conducting mounting seat.
[0014] Optionally, the heat-conducting mounting seat comprises a heat-conducting welding plate and a clamping ring arranged on the heat-conducting welding plate, the heat-conducting welding plate is arranged on the connecting piece, and a clamping seam is provided on the clamping ring;
[0015] The temperature sensor is arranged in the clamping ring.
[0016] Optionally, the grounding through hole is arranged at a position of the insulating layer close to a corresponding collection device.
[0017] Optionally, the insulating layer is provided with a plurality of signal through holes, the signal through holes are arranged in one-to-one correspondence with the signal line cores, and the signal through holes are located on the surface of the corresponding signal line core.
[0018] Optionally, the signal through hole is arranged at a position of the insulating layer close to a corresponding collection device.
[0019] Optionally, the acquisition interface is provided with at least one column of interface groups, and the interface group includes a ground interface and a plurality of signal interfaces.
[0020] Optionally, the acquisition busbar further includes a carrier plate, and the acquisition interface, the flexible flat wire, and the plurality of acquisition devices are arranged on the carrier plate.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] In the flexible flat wire, the collecting devices share a common ground, and a grounding core is provided in the flexible flat wire for grounding. A grounding through-hole is provided in the insulating layer, and the grounding through-holes are distributed along the grounding core so that the grounding core can be exposed with the help of the grounding through-holes, and the exposed position corresponds to the collector. In this way, each collector can connect to the grounding core through the corresponding grounding through-hole, and they are connected to the same grounding core, that is, the number of cores is nearly halved, and the number is only one more than the collecting device. Compared with conventional wires, it can effectively reduce the use of wires, improve the space utilization of battery modules, and is suitable for a variety of battery module space wiring; the reduction in wire usage brings about a reduction and simplification in the process flow, thereby reducing product costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of the collection busbar of the utility model;
[0024] Figure 2It is a top view schematic diagram of the collection busbar of the utility model;
[0025] Figure 3 It is a structural schematic diagram of the collection device in the collection busbar of the utility model.
[0026] In the figure:
[0027] 1. Collection interface;
[0028] 2. Flexible flat wire; 21. Insulation layer; 211. Grounding via; 212. Signal via; 22. Grounding core; 23. Signal core;
[0029] 3. Collection device; 31. Thermal mounting seat; 311. Thermal welding plate; 312. Clamping ring; 32. Temperature sensor; 321. Ground wire; 322. Signal wire;
[0030] 4. Connectors. DETAILED DESCRIPTION
[0031] The following will be combined with the attached examples of the present application Figure 1 To Attachment Figure 3 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.
[0032] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0033] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0034] like Figure 1-3 A collection busbar is shown, which includes a collection interface 1, a flexible flat wire 2, and multiple collection devices 3.
[0035] The acquisition interface 1 is connected to the flexible flat wire 2 for outputting the acquisition signal. The flexible flat wire 2 includes a plurality of wire cores and two insulating layers 21. The wire cores are arranged between the two insulating layers 21. The wire cores are parallel to each other. The wire cores are connected to the acquisition interface 1. The wire cores include a grounding wire core 22 and a plurality of signal wire cores 23. The insulating layer 21 is provided with a plurality of grounding through holes 211. The grounding through holes 211 are distributed along the grounding wire core 22. Each acquisition device 3 is arranged near the battery cell for collecting battery cell information. The acquisition device 3 is arranged one-to-one with each grounding through hole 211. Each acquisition device 3 is connected to the grounding wire core 22 via the corresponding grounding through hole 211. Each acquisition device 3 is also connected to one of the signal wire cores 23.
[0036] Under normal circumstances, the acquisition device 3 usually needs to be grounded and connected to the signal output. In this way, the number of wire cores used in the acquisition busbar is twice the number of the acquisition devices 3. In the case where the battery cell involves the acquisition of multiple signals, a larger number needs to be accommodated in the battery pack. In the utility model, in the flexible flat wire 2, the acquisition devices 3 are shared. Specifically, a grounding wire core 22 for grounding is provided in the flexible flat wire 2, and a grounding through hole 211 is provided in the insulating layer 21. The grounding through hole 211 is distributed along the grounding wire core 22, so that the grounding wire core can be exposed with the help of the grounding through hole 211, and the exposed position corresponds to the collector. In this way, each collector can connect to the grounding wire core 22 through the corresponding grounding through hole 211, and is connected to the same grounding wire core 22, that is, the number of wire cores is almost halved, and the number is only one more than the acquisition device 3. Compared with conventional wires, it can effectively reduce the use of wires, improve the space utilization of battery modules, and is suitable for the space wiring of various battery modules; the reduction in the use of wires brings about a reduction and simplification in the process flow, thereby reducing product costs.
[0037] In addition, a grounding through hole 211 is provided in the insulating layer 21 along the grounding wire core 22, so that the ground wire 321 of the acquisition device 3 can be connected with the same grounding wire core 22, and the amount of wire used is nearly halved. At the same time, the number of interfaces required for the acquisition interface 1 is also nearly halved, thereby reducing the size of the acquisition interface 1 and reducing the cost of the acquisition interface 1.
[0038] Furthermore, if Figure 1 , Figure 2 As shown, the acquisition busbar also includes a connector 4 for connecting two adjacent cells. The acquisition device 3 is arranged on the connector 4. Specifically, the connector 4 is a structure such as a copper bar or an aluminum bar. The connector 4 is a connection structure between cells. The connector 4 directly connects the cells. The state of the connector 4 is closest to the state of the cells. The acquisition device 3 obtains the cell information by collecting information on the connector 4.
[0039] As for the acquisition device 3, the acquisition device 3 includes an acquisition device 3 for acquiring battery cell parameters such as temperature, voltage, current, etc. For example, the temperature acquisition device 3 may specifically be an NTC (Negative Temperature Coefficient) thermistor.
[0040] In some embodiments of the temperature acquisition device 3, such as Figure 3 As shown, the temperature acquisition device 3 includes a heat-conducting mounting seat 31 and a temperature sensor 32. The heat-conducting mounting seat 31 is arranged on the connecting member 4, and the temperature sensor 32 is arranged on the heat-conducting mounting seat 31. By arranging the heat-conducting mounting seat 31, the installation stability of the temperature sensor 32 is improved. Under the premise that the heat-conducting mounting seat 31 has good thermal conductivity, the accuracy of temperature acquisition can be ensured.
[0041] Furthermore, if Figure 3 As shown, the heat-conducting mounting seat 31 includes a heat-conducting welding plate 311 and a clamping ring 312 disposed on the heat-conducting welding plate 311. The heat-conducting welding plate 311 is disposed on the connecting member 4, and a clamping slit is provided on the clamping ring 312. The temperature sensor 32 is disposed in the clamping ring 312. The heat-conducting welding plate 311 is welded to the connecting member 4, so that the heat-conducting mounting seat 31 is stably connected to the connecting member 4, and the temperature sensor 32 is clamped by the clamping ring 312, so that the installation stability of the temperature sensor 32 can be improved.
[0042] Specifically, the heat-conducting welding plate 311 and the clamping ring 312 are both made of copper or aluminum, so that good thermal conductivity of the heat-conducting mounting seat 31 can be ensured.
[0043] For the aforementioned grounding through hole 211, specifically, the grounding through hole 211 is arranged at a position of the insulating layer 21 close to the corresponding collection device 3. For example, two columns of battery cells are arranged side by side, the collection busbar is arranged above the two columns of battery cells, and the flexible flat wire 2 is located between the two columns of battery cells. The grounding through hole 211 is arranged along the extension direction of the flexible flat wire 2, or specifically, it is distributed along the extension direction of the grounding wire core 22. The connection line between the grounding through hole 211 and the collection device 3 is perpendicular or nearly perpendicular to the grounding wire core 22, so that the ground wire 321 required on the collection device 3 can be shortened.
[0044] On many acquisition busbars, the cables are divided into multiple wire groups, which include grounding wires for grounding and signal wires for output signals. During assembly, the wire group is bent so that the wire group turns toward the corresponding acquisition device 3 and then bent. The insulating layer 21 is provided with a plurality of signal through holes 212, and the signal through holes 212 are arranged one by one with the signal cores 23. The signal through holes 212 are located on the surface of the corresponding signal cores 23, so that the signal cores 23 can be exposed through the corresponding signal through holes 212 and connected to the acquisition device 3 through the signal through holes 212. Specifically, the signal line 322 attached to the acquisition device 3 can be welded to the exposed position of the corresponding signal core 23. During the assembly process, the bending steps of the wire group are reduced, thereby reducing the assembly steps, increasing the assembly speed, and reducing the production cost.
[0045] The acquisition device 3 needs to be grounded and also needs to output a signal, that is, Figure 3 As shown, the temperature sensor 32 is connected with a ground wire 321 and a signal wire 322. For the aforementioned signal through hole 212, the signal through hole 212 is arranged at a position of the insulating layer 21 close to the corresponding collection device 3. For example, two columns of cells are arranged side by side, the collection busbar is arranged above the two columns of cells, the flexible flat wire 2 is located between the two columns of cells, and the signal through hole 212 is arranged along the extension direction of the flexible flat wire 2. The connection between the signal through hole 212 and the collection device 3 is perpendicular or nearly perpendicular to the ground wire core 22, so that the signal line 322 required on the collection device 3 can be shortened.
[0046] At least one column of interface groups is provided on the acquisition interface 1. When one column of cells is provided in the battery pack, one column of interface groups is provided on the acquisition interface 1. When two columns of cells are arranged side by side in the battery pack, two columns of interface groups are provided on the acquisition interface 1. The interface groups include a ground interface and several signal interfaces, which reduces a large number of ground interfaces, thus effectively reducing the size of the acquisition interface 1.
[0047] Regarding the ground vias 211 and the signal vias 212 provided on the insulating layer 21, specifically, the ground vias 211 can be provided on any two insulating layers 21, and of course, preferably provided on the same insulating layer 21. The signal vias 212 can be provided on any two insulating layers 21, and of course, preferably provided on the same insulating layer 21.
[0048] In some embodiments of the material and busbar, the collection busbar further includes a carrier plate, and the collection interface 1, the flexible flat wire 2, and the plurality of collection devices 3 are arranged on the carrier plate.
[0049] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. A collection busbar, characterized in that: The acquisition busbar includes an acquisition interface, a flexible flat wire, and a plurality of acquisition devices; The acquisition interface is connected to the flexible flat wire and is used to output an acquisition signal; A flexible flat wire, the flexible flat wire comprising a wire core and two insulating layers, the wire core being arranged between the two insulating layers, the wire core being connected to the acquisition interface, the wire core comprising a grounding wire core and a plurality of signal wire cores, the insulating layer being provided with a plurality of grounding through holes, the grounding through holes being distributed along the grounding wire core; Each of the acquisition devices is arranged near the battery cell to collect battery cell information. The acquisition devices are arranged one-to-one correspondingly to each of the grounding through holes. Each of the acquisition devices is connected to the grounding core via the corresponding grounding through hole. Each of the acquisition devices is also connected to one of the signal cores.
2. The collection busbar according to claim 1, characterized in that: The collection busbar also includes a connector for connecting two adjacent battery cells; The collecting device is arranged on the connecting piece.
3. The collection busbar according to claim 2, characterized in that: The collection device includes a temperature collection device.
4. The collection busbar according to claim 3, characterized in that: The temperature collection device comprises a heat-conducting mounting seat and a temperature sensor. The heat-conducting mounting seat is arranged on the connecting member, and the temperature sensor is arranged on the heat-conducting mounting seat.
5. The collection busbar according to claim 4, characterized in that: The heat-conducting mounting seat comprises a heat-conducting welding plate and a clamping ring arranged on the heat-conducting welding plate, the heat-conducting welding plate is arranged on the connecting piece, and the clamping ring is provided with a clamping seam; The temperature sensor is arranged in the clamping ring.
6. The collection busbar according to claim 1, characterized in that: The grounding through hole is arranged at a position of the insulating layer close to the corresponding collection device.
7. The collection busbar according to claim 1, characterized in that: The insulating layer is provided with a plurality of signal through holes, the signal through holes are arranged in one-to-one correspondence with the signal line cores, and the signal through holes are located on the surface of the corresponding signal line cores.
8. The collection busbar according to claim 7, characterized in that: The signal through hole is arranged at a position of the insulating layer close to the corresponding acquisition device.
9. The collection busbar according to claim 1, characterized in that: The acquisition interface is provided with at least one column of interface groups, and the interface group includes a ground interface and a plurality of signal interfaces.
10. The collection busbar according to claim 1, characterized in that: The acquisition busbar further includes a bearing plate, and the acquisition interface, the flexible flat wire, and a plurality of acquisition devices are arranged on the bearing plate.