CN220420815U

CN220420815U - Integrated busbar and battery module

Info

Publication number: CN220420815U
Application number: CN202322073207.9U
Authority: CN
Inventors: 叶时堃; 李腾飞
Original assignee: Dongguan Furui Electronic Technology Co ltd
Current assignee: Dongguan Furui Electronic Technology Co ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-01-30
Anticipated expiration: 2033-08-03

Abstract

The utility model discloses an integrated busbar and a battery module, wherein the integrated busbar comprises a tray, a cable and a plurality of conductive sheets; the tray is provided with a plurality of installation areas for arranging and installing the conducting strips, a power connection hollow area is arranged in the installation areas, and welding avoidance holes are formed at two ends of the installation areas; the conducting strip is arranged on the lower surface of the mounting area; the cable set up in the upper surface of tray, the cable includes a plurality of branch cable, the end of branch cable extends to connect the electricity fretwork district in the installation zone, the end of branch cable passes connect the electricity fretwork district is connected the conducting strip. The conductive sheet is positioned on the lower surface of the tray, the electrodes of the battery cells can be covered at the two ends of the conductive sheet in a larger area, the electrode difference which can be tolerated by the conductive sheet is wider, the integrated busbar has higher universality, wider applicability and the custom development of the integrated busbar is reduced, so that the production cost is effectively reduced.

Description

Integrated busbar and battery module

Technical Field

The utility model relates to the technical field of new energy components, in particular to an integrated busbar and a battery module.

Background

The energy sources are usually output immediately, such as wind energy, solar energy, water energy, fire energy and the like, and the energy sources need to be converted in real time to ensure continuous supply of the electric energy. The state of the power plant itself, the transmission lines, etc. can affect the power supply and even cause the power supply to be disconnected. In addition, in many outdoor power usage scenarios, large capacity mobile energy storage devices, such as mobile power vehicles, are required. Accordingly, large-scale energy storage devices have also evolved.

The energy storage device mainly comprises a battery module, an integrated busbar and a power supply control main board. In different new energy application industries, the arrangement difference of the positive and negative electrode shape positions of the battery module is large, and even if the same home appliance core provider is purchased, the difference of the positive and negative electrode shape positions still exists in different user specific customized structures. Therefore, when the integrated busbar is designed, individual customization is needed for each use, the integrated busbar cannot be designed in a generalized mode, and the production cost of the integrated busbar is increased.

Disclosure of Invention

In order to solve the technical problem that the busbar in the prior art cannot be designed in a universal manner, one of the purposes of the utility model is to provide an integrated busbar, and the other purpose of the utility model is to provide a battery module which can improve the universality of the integrated busbar, reduce the individual customization of users and reduce the production cost of the integrated busbar.

One of the purposes of the utility model is realized by adopting the following technical scheme:

an integrated busbar comprising a tray, a cable, and a plurality of conductive sheets;

the tray is provided with a plurality of installation areas for arranging and installing the conducting strips, a power connection hollow area is arranged in the installation areas, and welding avoidance holes are formed at two ends of the installation areas;

the conducting strip is arranged on the lower surface of the mounting area;

the cable set up in the upper surface of tray, the cable includes a plurality of branch cable, the end of branch cable extends to connect the electricity fretwork district in the installation zone, the end of branch cable passes connect the electricity fretwork district is connected the conducting strip.

Optionally, a first fixing hole is formed in the conductive sheet;

the lower surface of the installation area is provided with a first connecting column, the first connecting column stretches into the first fixing hole, and the first connecting column is connected with the conducting strip.

Optionally, the power connection hollow area comprises a power transmission hollow area;

the branch cable comprises a power transmission cable, and the tail end of the power transmission cable penetrates through the power transmission hollowed-out area to be connected with the conducting strip.

Optionally, the power connection hollowed-out area further comprises an induction hollowed-out area;

the integrated busbar further comprises a plurality of temperature sensors, the temperature sensors are arranged in the sensing hollowed-out areas, and the temperature sensors are connected with the upper surfaces of the conducting strips.

Optionally, the branch cable further comprises an induction cable, the tail end of the induction cable extends to the induction hollowed area, and the induction cable is connected with the temperature sensor.

Optionally, an adhesive piece is arranged on the upper surface of the conductive sheet, corresponding to the power transmission hollowed-out area, and covers the tail end of the power transmission cable, and the adhesive piece is simultaneously connected with the tail end of the power transmission cable and the conductive sheet.

Optionally, welding holes are formed at two ends of the conductive sheet.

Optionally, the branch cable comprises a power transmission cable, and a hot melting section is arranged on the power transmission cable.

Optionally, a joint groove is formed in the tray, and a second connecting column is arranged in the joint groove;

the integrated busbar further comprises a connector, a second fixing hole is formed in the connector, at least part of the connector is arranged in the connector groove, and the connector is connected with the second connecting column through the second fixing hole.

The second purpose of the utility model is realized by adopting the following technical scheme:

the battery module comprises a plurality of battery cells and an integrated busbar, wherein the battery cells are arranged into a battery cell array, the tray is arranged on the battery cell array, and the installation area and the electrodes of the battery cells are arranged up and down correspondingly.

Compared with the prior art, the utility model has the beneficial effects that:

in the utility model, the installation area of the tray is an area for conducting installation, and the conducting strip is arranged on the lower surface of the installation area, namely the conducting strip is arranged on the lower surface of the tray. The cable is connected with the conducting strip through the power connection hollowed-out area, so that the cable can still be connected with the cable even if the conducting strip is positioned on the lower surface of the tray. When the conducting strip is located the tray lower surface, the electrode of battery core can be covered with the both ends of conducting strip in bigger area, and the electrode difference that the conducting strip can tolerate is more extensive, and the female row of integration has higher commonality, has more extensive suitability, reduces the customization research and development of the female row of integration to reduce manufacturing cost effectively.

Drawings

FIG. 1 is a schematic diagram of the front structure of an integrated busbar according to the present utility model;

FIG. 2 is a schematic top view of an integrated busbar according to the present utility model;

FIG. 3 is a schematic view of the back structure of an integrated busbar according to the present utility model;

FIG. 4 is an exploded view of an integrated busbar of the present utility model;

FIG. 5 is a schematic diagram of the connection of branch cables to conductive strips in an integrated busbar according to the present utility model;

fig. 6 is a schematic cross-sectional view of a hot melt section of a power cable in an integrated busbar of the present utility model along a length direction;

fig. 7 is a schematic cross-sectional view of a power cable at a groove in an integrated busbar of the present utility model.

In the figure:

1. a cable; 11. branching cables; 111. a power transmission cable; 1111. a wire core; 1112. an insulating film; 111a, a hot melting section; 112. a sensing cable 112;

2. a tray; 21. an installation area; 211. transmitting electricity to the hollow area; 212. sensing the hollow area; 22. welding the avoidance hole; 23. a wire slot; 24. a groove; 25. a first connection post; 26. ventilation holes; 27. a joint groove; 28. a second connection post;

3. a conductive sheet; 31. a first fixing hole; 32. an adhesive member; 33. Welding holes;

4. a temperature sensor;

5. a connector; 51. and a second fixing hole.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to fig. 1 to 7 in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is correspondingly changed.

Furthermore, the descriptions of "first," "second," and the like, herein are for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

An integrated busbar as shown in fig. 1-4 comprises a cable 1, a tray 2 and a plurality of conductive strips 3. The tray 2 is provided with a plurality of installation areas 21 for arranging and installing the conducting strips 3, a power connection hollow area is arranged in the installation area 21, and welding avoidance holes 22 are formed in two ends of the installation area 21. The conductive sheet 3 is provided on the lower surface of the mounting region 21. The cable 1 sets up in the upper surface of tray 2, and cable 1 includes a plurality of branch cable 11, and the end of branch cable 11 extends to the electric connection fretwork district in the installation zone 21, and the end of branch cable 11 passes electric connection fretwork district and connects conducting strip 3. In this embodiment, the mounting area 21 of the tray 2 is an area for conductive mounting, and the conductive sheet 3 is disposed on the lower surface of the mounting area 21, that is, the conductive sheet 3 is disposed on the lower surface of the tray 2. The cable 1 is connected with the conductive sheet 3 through the electric connecting hollow area, so that even if the conductive sheet 3 is positioned on the lower surface of the tray 2, the cable 1 can still be connected. When conducting strip 3 is located tray 2 lower surface, the electrode of battery core can be covered with the area that the both ends of conducting strip 3 can be with bigger, and the electrode difference that conducting strip 3 can tolerate is more extensive, and the female row of integration has higher commonality, has more extensive suitability, reduces the customization research and development of the female row of integration to reduce manufacturing cost effectively.

Specifically, the installation areas 21 are distributed in a scattered manner, for example, more than one column of installation areas 21 is provided on the tray 2, each column of installation areas 21 has a plurality of installation areas 21, for example, a wire groove 23 extending along the length direction of the tray 2 is provided on the tray 2, one side of the wire groove 23 is provided with a column of installation areas 21, or two sides of the wire are provided with a column of installation areas 21.

Further, a wire groove 23 extending along the length direction of the tray 2 is arranged in the middle of the tray 2, a plurality of grooves 24 are formed in two sides of the wire groove 23, and the wire groove 23 is communicated with the grooves 24.

The area where the groove 24 is located is the mounting area 21, i.e. the power-on hollowed-out area is arranged at the bottom of the groove 24. The cable 1 is disposed in the raceway 23 and the end of the branch cable 11 extends into the recess 24. In this embodiment, the tray 2 is a whole bearing structure of an integrated busbar, and on the tray 2, the cable 1 is borne by the wire slot 23, and the conductive sheet 3 is borne by the tray 2.

The cable 1 may be an FFC (Flexible Flat Cable, flexible cable) or an FPC (Flexible Printed Circuit, flexible circuit board).

In some embodiments of the integrated busbar, as shown in fig. 3, the conductive sheet 3 is provided with a first fixing hole 31. The lower surface of the mounting area 21 is provided with a first connecting post 25, the first connecting post 25 extends into the first fixing hole 31, and the first connecting post 25 is connected with the conductive sheet 3. Through the connection of the first connecting column 25 and the conductive sheet 3, the conductive sheet 3 is fixed on the lower surface of the tray 2, and the conductive sheet 3 is prevented from shifting or falling off before being welded on the battery cell.

Further, the first connection post 25 is a heat-fusible post, and the first connection post 25 protrudes from the conductive sheet 3. Through the hot-melt process, the end of the first connection post 25 is heated, so that the end of the hot-melt post is deformed, and the size of the end of the hot-melt post exceeds the first fixing hole 31, so that the first connection post 25 is fixedly connected with the conductive sheet 3.

Of course, the first fixing hole 31 may be coated with an adhesive, and the first connection post 25 and the conductive sheet 3 may be fixedly connected by the adhesive.

Also, the first connecting post 25 may be clamped in the first fixing hole 31, for example, an elastic barb is disposed on the first connecting post 25, so as to implement clamping.

Further, as shown in fig. 3 and 5, the conductive sheet 3 is provided with a soldering hole 33, specifically, two ends of the conductive sheet 3 are provided with soldering holes 33, and the soldering holes 33 penetrate the conductive sheet 3. After the welding hole 33 is formed, the welding energy is conveniently concentrated on the surface of one side close to the battery cell, the welding difficulty is reduced, the welding stability is improved, for example, during laser welding, laser is more easily focused on one end, close to the battery cell, of the welding hole 33, namely, the laser energy is concentrated on the surface of one side, close to the battery cell, of the conducting strip 3. The mounting area 21 is provided with a welding avoidance hole 22 which is correspondingly arranged with the welding hole 33, of course, the bottom of the groove 24 is provided with the welding avoidance hole 22, the conductive sheet 3 can be directly welded with the battery cell through the welding avoidance hole 22, the local welding coking of the tray 2 is avoided, and the influence of impurities generated by coking on the welding quality is avoided.

As shown in fig. 2 to 4, the bottom of the wire slot 23 is provided with a vent 26, so that the air pressure in the battery cell is balanced to exhaust, and the vent 26 is convenient for the battery cell to balance and ventilate in time. Specifically, the bottom of the wire slot 23 is provided with a plurality of ventilation holes 26 which are arranged in a row.

In some embodiments of the mounting region 21, as shown in fig. 2, 3, 4, and 7, the power-on hollow region includes a power-off hollow region 211. The branch cable 11 includes a power transmission cable 111, and the end of the power transmission cable 111 passes through the power transmission hollow area 211 and is connected with the conductive sheet 3.

Further, as shown in fig. 2, 3 and 4, the conductive hollow region further includes a sensing hollow region 212. The integrated busbar further comprises a plurality of temperature sensors 4, the temperature sensors 4 are arranged in the sensing hollowed-out areas 212, and the temperature sensors 4 are connected with the upper surfaces of the conducting strips 3.

In addition, the branch cable 11 further includes a sensing cable 112, the end of the sensing cable 112 extends to the sensing hollow area 212, and the sensing cable 112 is connected to the temperature sensor 4.

In this embodiment, the conductive sheet 3 is an output electrode of the battery cell, and also serves as a bridge structure of adjacent or similar battery cells, and the current state of the bridge structure is the same as or similar to the current state of the inside of the battery cell, that is, the conductive sheet 3 can relatively truly reflect the state of the inside of the battery cell, such as the internal current and the internal temperature, and the temperature sensor 4 can sense the temperature of the conductive sheet 3, so that the temperature of the battery cell is reacted through the temperature of the conductive sheet 3. Therefore, in this embodiment, a plurality of temperature sensors 4 are added, and the temperature sensors 4 are arranged in one-to-one correspondence with the conductive sheets 3, and certainly are also arranged in one-to-one correspondence with the battery cells, so that the state inside the battery cells is monitored through the temperature sensors 4.

In some electrical connection embodiments of the conductive sheet 3 and the power transmission cable 111, as shown in fig. 5, an adhesive member 32 is disposed on an upper surface of the conductive sheet 3 corresponding to the power transmission hollow area 211, the adhesive member 32 covers an end of the power transmission cable 111, and the adhesive member 32 connects the end of the power transmission cable 111 and the conductive sheet 3 at the same time. In this embodiment, the adhesive member 32 is provided on the conductive sheet 3, the adhesive member 32 adheres the conductive sheet 3 and the end of the power transmission cable 111, and the adhesive member 32 applies a holding force to the end of the power transmission cable 111, thereby further preventing the power transmission cable 111 from falling off from the conductive sheet 3.

As for the conductive sheet 3 herein, specifically, the conductive sheet 3 may be an aluminum bar, a copper bar, or the like, and an aluminum bar is preferable in this embodiment.

In some embodiments of branch cable 11, as shown in fig. 4 and 5, branch cable 11 includes an electrical power cable 111, and a heat-fusible section 111a is provided on electrical power cable 111. Specifically, the cross-sectional area of the hot melt section 111a is smaller than the cross-sectional area of the other locations of the power transmission cable 111. Therefore, when the circuit is short-circuited, the electric core outputs electric energy with high power, and the hot melting section 111a has higher heating value due to the small cross section area, so that the electric core is quickly melted when the short circuit occurs, the short circuit is disconnected, and the safety of the electric core is improved.

The power transmission cable 111 includes a core 1111 and an insulating film 1112, the core 1111 being a flat-shaped core 1111. The wire core 1111 is exposed at one side of the end of the power transmission cable 111, and the conductive sheet 3 is welded to the exposed side of the wire core 1111. In the present embodiment, the insulating film 1112 on the side of the end of the power transmission cable 111 is removed so that one side of the core 1111 is exposed, and the end of the power transmission cable 111 can be welded with the exposed portion of the core 1111. Meanwhile, the insulation film 1112 is still coated on the other side of the tail end of the power transmission cable 111, after welding, the insulation film 1112 and the conductive sheet 3 are adhered under the influence of the welding temperature, so that a holding force can be provided for a welding position, the power transmission cable 111 is prevented from falling off from the conductive sheet 3, and the tail end of the power transmission cable 111 has higher welding stability.

In addition, in this embodiment, the conductive sheet 3 is directly welded to the power transmission cable 111, and the adaptor and the zinc sheet are omitted, so that the use of raw materials is reduced, the welding step between the power transmission cable 111 and the adaptor is reduced, the cost is reduced, and the processing time is shortened.

In some embodiments of the integrated busbar, as shown in fig. 1, in order to improve the convenience of connecting to an external circuit, the integrated busbar further includes a connector 5, and the integrated busbar can be connected to the external circuit through the connector 5, which has the advantage of being fast and convenient. Specifically, the connector 5 connects the cable 1.

Further, as shown in fig. 4, a joint groove 27 is formed on the tray 2, and a second connecting post 28 is formed in the joint groove 27. The connector 5 is provided with a second fixing hole 51, and the connector 5 is at least partially arranged in the connector groove 27. When the connector 5 is embedded in the connector slot 27, the second connecting post 28 is embedded in the second fixing hole 51, and the connector 5 is connected with the second connecting post 28 through the second fixing hole 51.

Specifically, the second fixing hole 51 may be formed on the main board of the connector 5. Of course, the second fixing hole 51 may be provided in the base of the connector 5 itself.

The second connecting post 28 may be a heat-melting post, and the second connecting post 28 protrudes from the connecting head 5, that is, the second connecting post 28 protrudes from the second fixing hole 51. Through the hot melt process, the upper end of the hot melt column is heated for the upper end of the hot melt column takes place deformation, and the hot melt column size surpasses second fixed orifices 51, thereby makes second spliced pole 28 and connector 5 fixed connection.

Of course, the second fixing hole 51 may be coated with adhesive, and the second connecting post 28 and the connecting head 5 may be fixedly connected by the adhesive.

In addition, the second connecting post 28 may be clamped in the second fixing hole 51, for example, an elastic barb is disposed on the second connecting post 28, so as to realize clamping.

The utility model also provides a battery module, which comprises a plurality of electric cores and the integrated busbar, wherein the electric cores are arranged into an electric core array, the tray 2 is arranged on the electric core array, the installation area 21 is arranged correspondingly to the electric cores from top to bottom, and the grooves 24 are arranged correspondingly to the electric cores from top to bottom.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. An integrated busbar, wherein the integrated busbar comprises a tray, a cable and a plurality of conductive sheets;

the conducting strip is arranged on the lower surface of the mounting area;

2. The integrated busbar of claim 1 wherein the conductive sheet has a first securing hole;

3. The integrated busbar of claim 1, wherein the power connection hollowed-out region comprises a power transmission hollowed-out region;

4. The integrated busbar of claim 3 wherein the powered hollow region further comprises an inductive hollow region;

5. The integrated busbar of claim 4, wherein the branch cable further comprises a sense cable, the sense cable having a distal end extending to the sense hollowed out area, the sense cable connecting the temperature sensor.

6. The integrated busbar of claim 3, wherein an adhesive piece is disposed on an upper surface of the conductive sheet corresponding to the power transmission hollowed-out area, the adhesive piece covers an end of the power transmission cable, and the adhesive piece connects the end of the power transmission cable and the conductive sheet at the same time.

7. The integrated busbar of claim 1, wherein both ends of the conductive sheet are provided with solder holes.

8. The integrated busbar of claim 1, wherein the branch cable comprises a power cable having a hot melt section disposed thereon.

9. The integrated busbar of claim 1, wherein the tray is provided with a connector slot, and a second connecting column is arranged in the connector slot;

10. The battery module is characterized by comprising a plurality of electric cores and the integrated busbar according to any one of claims 1 to 9, wherein the electric cores are arranged into an electric core array, the tray is arranged on the electric core array, and the installation area is arranged vertically corresponding to the electrodes of the electric cores.