Improved busbar and battery pack

Abstract

The utility model provides an improved busbar and a battery pack, and belongs to the technical field of battery packs. The problem that an existing busbar leaks electricity when transmitting current and occupies the internal space of a battery pack is solved. The utility model relates to an improved busbar, which comprises a connecting piece, an insulating sleeve and a mounting cylinder. According to the utility model, as the connecting piece is sleeved with the insulating sleeve, the connecting piece and the cross beam can be effectively blocked through the arrangement of the insulating sleeve, so that the current is prevented from being leaked to the cross beam of the battery pack when passing through the connecting piece, and the bus bar can stably transmit the current; and secondly, the connecting piece directly penetrates through the cross beam, so that the part of the connecting piece positioned on the cross beam can be prevented from being exposed outside the cross beam, and the internal space of the battery pack occupied by the connecting piece is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs and relates to an improved busbar and a battery pack. Background Art

[0002] The battery bus is a conductive metal strip used to connect battery cells. It can connect battery cells in series or parallel to meet the voltage and capacity requirements of different battery packs. In order to ensure the stability of the battery pack structure, horizontal and vertical beams are often used as supports in the battery pack. Therefore, the bus needs to be designed to avoid these horizontal and vertical beams. This will make the structure of the bus more complicated and increase the space it occupies inside the battery pack. In addition, most of the bus will contact the beams, which are made of metal. This will cause the current to leak to the beams when passing through the bus, thereby affecting the current transmission performance of the bus. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose an improved busbar and battery pack that can stably transmit current through the busbar and reduce the space occupied by the battery pack.

[0004] The purpose of the utility model can be achieved through the following technical solutions: an improved busbar, comprising:

[0005] Connectors;

[0006] The insulating sleeve is sleeved on the connecting piece, and both sides of the connecting piece extend out of the insulating sleeve. Both sides of the connecting piece extending out of the insulating sleeve are connected with mounting tubes.

[0007] In the above-mentioned improved busbar, the insulating sleeve is provided with an open opening for the connecting piece to pass through.

[0008] In the above-mentioned improved busbar, the connecting member is a first connecting plate, and both side edges of the first connecting plate extend out of the insulating sleeve through corresponding openings.

[0009] In the above-mentioned improved busbar, both sides of the first connecting plate extending out of the insulating sleeve are connected to corresponding mounting tubes respectively.

[0010] In the above-mentioned improved busbar, the connecting member includes a second connecting plate, side plates are provided on both sides of the second connecting plate, and protrusions are provided on the side of the side plate away from the second connecting plate, and the protrusions pass through the corresponding open openings.

[0011] In the above-mentioned improved busbar, a busbar is welded to each of the protrusions, and each of the busbars is connected to a mounting tube.

[0012] In the above-mentioned improved busbar, each of the mounting tubes has a card cavity therein, and the cross-sectional area of the card cavity in the transverse direction gradually increases from one end to the other end of the card cavity.

[0013] A battery pack comprises a crossbeam and the above-mentioned improved busbar mounting tube, a connector and an insulating sleeve, wherein the connector passes through the crossbeam.

[0014] In the above-mentioned battery pack, the number of the battery cells is the same as the number of the mounting tubes, each of the battery cells is provided with an external pole, and the external pole is clamped in the corresponding mounting tube, and there is an extrusion force between the external pole and the mounting tube.

[0015] In the above-mentioned battery pack, the connecting member and the crossbeam are separated by an insulating sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, an insulating sleeve is provided on the connector, which can effectively block the connector and the crossbeam, thereby preventing the current from leaking to the crossbeam of the battery pack when passing through the connector, thereby ensuring that the busbar can stably transmit current.

[0018] 2. By passing the connector directly through the crossbeam, the portion of the connector located on the crossbeam can be prevented from being exposed outside the crossbeam, thereby reducing the internal space of the battery pack occupied by the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram when the connector in the busbar uses the first structure.

[0020] Figure 2 yes Figure 1 Assembly diagram of busbar and battery cell.

[0021] Figure 3 This is a structural diagram when the second structure is selected for the connector in the busbar.

[0022] Figure 4 yes Figure 3 Schematic diagram of the structure of the busbar after removing the insulating sleeve.

[0023] Figure 5 yes Figure 3 Assembly drawing of busbar and crossbeam in .

[0024] Figure 6 yes Figure 3 Assembly diagram of busbars, crossbars and battery cells. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] Example 1

[0027] like Figure 1 、 Figure 3 as well as Figure 4 As shown, an improved busbar of the present invention includes a connector 100 , an insulating sleeve 200 and a mounting tube 300 .

[0028] In the present invention, the busbar of the present invention is applied to the battery cells 500 of the battery pack.

[0029] The insulating sleeve 200 is sleeved on the connector 100, and both sides of the connector 100 extend out of the insulating sleeve 200. Both sides of the connector 100 extending out of the insulating sleeve 200 are connected to the mounting tube 300. During installation, people need to connect the two battery cells 500 in the battery pack together through the mounting tube 300. In this way, the two battery cells 500 can be connected in series or in parallel. Furthermore, when the bus connects the two battery cells 500 together, since the insulating sleeve 200 is sleeved on the connector 100, the setting of the insulating sleeve 200 can effectively block the connector 100 and the metal structure in the battery pack, thereby preventing the current from being transferred to the metal structure of the battery pack when passing through the connector 100, thereby ensuring that the bus can stably transmit current.

[0030] The insulating sleeve 200 is provided with an opening 210 for the connector 100 to pass through.

[0031] The following is a first structure of the connector 100:

[0032] The connecting member 100 is a first connecting plate 110 , both sides of which extend out of the insulating sleeve 200 through corresponding openings 210 . Both sides of the first connecting plate 110 extending out of the insulating sleeve 200 are connected to corresponding mounting tubes 300 .

[0033] The second structure of the connector 100 is as follows:

[0034] The connecting member 100 includes a second connecting plate 120, and side plates 121 are provided on both sides of the second connecting plate 120. A protrusion 122 is provided on the side of the side plate 121 away from the second connecting plate 120. The protrusion 122 passes through the corresponding open port 210. A busbar 123 is welded to each of the protrusions 122, and each of the busbars 123 is connected to a mounting tube 300.

[0035] Example 2

[0036] like Figures 1 to 6As shown, this embodiment applies the busbar in the first embodiment to a battery pack.

[0037] Specifically, a battery pack includes: a crossbeam 400 and the above-mentioned improved busbar mounting tube 300, a connector 100 and an insulating sleeve 200, wherein the crossbeam 400 is fixed inside the battery pack, and the crossbeam can support the battery pack to increase the stability of the battery pack. The battery cell 500 is clamped inside the battery pack, and the connector 100 passes through the crossbeam 400. By directly passing the connector 100 through the crossbeam 400, the connector 100 can be prevented from being located on the crossbeam 400. The portion is exposed on the outside of the crossbeam 400, thereby reducing the internal space of the battery pack occupied by the connector 100. The battery pack also includes: battery cells 500, the number of which is the same as the number of mounting tubes 300, each of which is provided with an outer pole 510, which is clamped in the corresponding mounting tube 300, and there is an extrusion force between the outer pole 510 and the mounting tube 300, and the connector 100 is separated from the crossbeam 400 by the insulating sleeve 200.

[0038] like Figures 1 to 2 As shown, when the busbar selects the first structure of the connector 100, people need to first put the insulating sleeve 200 suitable for the first connecting plate 110 on the first connecting plate 110, and make the two side edges of the first connecting plate 110 pass through the open mouth 210 to pass through the insulating sleeve 200, then pass the first connecting plate 110 through the crossbeam 400, and then weld the two mounting tubes 300 to the two side edges of the first connecting plate 110 respectively, and then, insert the outer pole 510 on the battery cell 500 into the corresponding mounting tube 300, and clamp the battery cell 500 in the corresponding position of the battery pack, so that the two battery cells 500 can be connected through the busbar. Furthermore, because the first connecting plate 110 and the crossbeam 400 are blocked by the insulating sleeve 200, it can be avoided that the current is transferred to the crossbeam 400 when passing through the first connecting plate 110, thereby ensuring that the busbar can transmit current stably.

[0039] like Figures 3 to 6As shown, when the busbar uses the second structure of the connector 100, people need to first put the insulating sleeve 200 suitable for the second connecting plate 120 on the second connecting plate 120 and the side plate 121, and expose the protrusion 122 outside the insulating sleeve 200 through the corresponding opening 210. Thereafter, the second connecting plate 120 is passed through the crossbeam 400, and the two side plates 121 are respectively located on both sides of the crossbeam 400. After that, the two busbars 123 are welded together with the corresponding protrusions 122, and the mounting tube 300 is integrally connected or welded to the corresponding busbar 123, so that people can insert the outer pole 510 on the battery cell 500 into the mounting tube 300, and the battery cell is inserted. 500 is stuck in the corresponding position of the battery pack, so that the two battery cells 500 are connected in series or in parallel through the bus, and the bus, the beam 400 and the two battery cells 500 can form a whole. By repeating the above operation, multiple busbars and a corresponding number of battery cells 500 can be integrated on the same beam 400 to complete the assembly of the battery pack. Furthermore, because the second connecting plate 120 and the beam 400 and the side plate 121 and the beam 400 are blocked by the insulating sleeve 200, it can be avoided that the current is transferred to the beam 400 when passing through the second connecting plate 120 and the side plate 121, thereby ensuring that the bus can stably transmit current.

[0040] Furthermore, since the crossbeam 400 is fixed inside the battery pack, the battery cell 500 is fixed inside the battery pack, and the bus is connected to the battery cell 500 through the mounting tube 300, the bus will not move relative to the crossbeam 400 during use, thereby ensuring that the bus can work stably.

[0041] like Figures 1 to 2 As shown, each of the mounting tubes 300 has a card cavity 310, and the cross-sectional area of the card cavity 310 in the transverse direction gradually increases from one end of the card cavity 310 to the other end, so that when the outer pole 510 is inserted into the corresponding mounting tube 300, there is a certain extrusion force between the mounting tube 300 and the outer pole 510, so that the outer pole 510 can be stably clamped in the mounting tube 300, and the side of the rod-shaped body can be close to the inner wall of the mounting tube 300, thereby effectively increasing the contact area between the outer pole 510 and the mounting tube 300, that is, it can effectively increase the contact area between each battery cell 500 and the bus, thereby effectively increasing the ability of the bus to pass current and improving the safety of the battery pack.

[0042] The installation barrel 300 is provided with an opening 320 , which can avoid the connection between the outer pole 510 and the battery cell 500 so that the outer pole 510 can be smoothly inserted into the installation barrel 300 .

[0043] Furthermore, the inner wall shape of the card cavity 310 is generally truncated cone-shaped, and the outer surface shape of the mounting tube 300 is generally cylindrical. Specifically, the outer pole 510 is also truncated cone-shaped. In this way, when people insert the outer pole 510 into the card cavity 310, the contact mode between the rod-shaped body and the mounting tube 300 will become surface-to-surface contact. Compared with the existing technology, the contact area between the battery cell 500 and the bus is effectively increased, thereby effectively increasing the ability of the bus to pass current and avoiding the use of welding process between the battery cell and the bus.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0047] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. An improved busbar, characterized in that: include: Connectors; The insulating sleeve is sleeved on the connecting piece, and both sides of the connecting piece extend out of the insulating sleeve. Both sides of the connecting piece extending out of the insulating sleeve are connected with mounting tubes.

2. The improved busbar according to claim 1, characterized in that: The insulating sleeve is provided with an opening for the connecting piece to pass through.

3. The improved busbar according to claim 2, characterized in that: The connecting member is a first connecting plate, and both side edges of the first connecting plate extend out of the insulating sleeve through corresponding openings.

4. The improved busbar according to claim 3, characterized in that: The two side edges of the first connecting plate extending out of the insulating sleeve are respectively connected to corresponding mounting tubes.

5. The improved busbar according to claim 2, characterized in that: The connecting member includes a second connecting plate, and side plates are provided on both sides of the second connecting plate. A protrusion is provided on a surface of the side plate away from the second connecting plate, and the protrusion passes through the corresponding open opening.

6. The improved busbar according to claim 5, characterized in that: A busbar is welded on each of the protrusions, and a mounting tube is connected to each of the busbars.

7. The improved busbar according to claim 1, characterized in that: Each of the installation tubes has a card cavity therein, and the cross-sectional area of the card cavity in the transverse direction gradually increases from one end to the other end of the card cavity.

8. A battery pack, characterized in that: include: A crossbeam and an improved busbar installation tube, a connector and an insulating sleeve as claimed in any one of claims 1 to 7, wherein the connector passes through the crossbeam.

9. The battery pack according to claim 8, characterized in that: Also includes: The number of the battery cells is the same as the number of the mounting tubes. Each of the battery cells is provided with an outer pole, which is clamped in the corresponding mounting tube, and there is an extrusion force between the outer pole and the mounting tube.

10. The battery pack according to claim 8, characterized in that: The connecting piece and the crossbeam are separated by an insulating sleeve.

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