Integrated busbar and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses an integrated busbar and a battery pack, which comprise a busbar and an isolation plate. Limiting holes are formed in the busbar. Limiting columns are arranged on the face, close to the busbar, of the isolation plate, the limiting columns and the limiting holes are arranged correspondingly, and the limiting columns are suitable for being detachably inserted into the limiting holes. According to the utility model, when the integrated busbar is installed, each busbar is respectively welded on the corresponding battery cell pole. At the moment, the limiting columns can be pulled out of the limiting holes forcibly to detach the isolation plate from the busbar, so that not only is the weight of the whole battery pack reduced, but also the combustion risk of the isolation plate made of a non-metal material is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an integrated busbar and a battery pack. Background Art

[0002] The integrated busbar is the CCS assembly. The full English name of CCS is Cells Contact System. It mainly consists of signal acquisition components (such as FPC (Flexible Printed Circuit), PCB (Printed Circuit Board), FFC (Flexible Flat Cable), etc.), isolation plates, busbars, etc., and is connected into a whole through processes such as laser welding, hot pressing or riveting. The integrated busbar plays a key role in the energy storage system. It is installed on the battery pack, connected to the electrode posts of the battery cells through the busbar, and works together with other components to jointly form a complete battery pack. The integrated busbar can collect the voltage data of the battery cells, facilitating the battery management system (battery management system, abbreviated as BMS) to monitor the battery pack in real time.

[0003] In the integrated busbar, the isolation plate plays a role in fixing the busbar. However, after the busbar is welded to the electrode post of the battery cell, the busbar is fixedly welded to the electrode post of the battery cell, and at this time, there is no need for the isolation plate to fix the position of the busbar. And in the existing integrated busbar, the busbar and the isolation plate are fixedly connected by means such as thermal riveting. After the busbar is welded to the electrode post of the battery cell, the isolation plate cannot be removed, making the isolation plate a part of the battery pack. This not only increases the weight of the battery pack, but also increases the combustion risk as the isolation plate is a non-metallic material. Summary of the Utility Model

[0004] In view of this, the utility model provides an integrated busbar and a battery pack to solve the problem that the isolation plate cannot be removed after the busbar is welded to the electrode post of the battery cell.

[0005] In a first aspect, the utility model provides an integrated busbar, including:

[0006] A busbar, on which a limiting hole is provided;

[0007] An isolation plate, on one side of the isolation plate close to the busbar, a limiting post is provided, the limiting post is correspondingly arranged with the limiting hole, and the limiting post is adapted to be detachably inserted into the limiting hole.

[0008] Beneficial effects: The surface of the separator is provided with positioning posts, and positioning holes are formed in the bus bar. After inserting the positioning posts into the positioning holes, the positioning posts are restricted from leaving the positioning holes. When installing the integrated bus bar, each bus bar is respectively welded to the corresponding cell pole. At this time, the positioning posts can be pulled out of the positioning holes with force to remove the separator from the bus bar, which not only reduces the weight of the entire battery pack, but also eliminates the combustion risk of the separator made of non-metallic material.

[0009] In an alternative embodiment, it further includes:

[0010] An intermediate sleeve is arranged between the positioning post and the positioning hole. The bus bar is sleeved on the intermediate sleeve through the positioning hole and presses the intermediate sleeve towards the direction close to the positioning post.

[0011] Beneficial effects: It plays a buffering role between the positioning post and the positioning hole of the bus bar, avoiding damage to the bus bar caused by direct contact between the bus bar and the positioning post.

[0012] In an alternative embodiment, the inner wall of the intermediate sleeve is fixedly connected to the outer wall of the positioning post.

[0013] Beneficial effects: When the positioning hole of the bus bar is sleeved on the intermediate sleeve, it prevents the intermediate sleeve from axially displacing along the positioning post, resulting in the positioning hole of the bus bar not being properly sleeved.

[0014] In an alternative embodiment, a strengthening area is provided on the separator, and the strengthening area of the separator bulges away from the bus bar to form a strengthening rib.

[0015] Beneficial effects: The presence of the strengthening rib makes it not easy to bend at its position, increasing the strength of the separator. Prevent the separator from bending and affecting the positioning and fixation of the bus bar.

[0016] In an alternative embodiment, it further includes:

[0017] A connecting member is connected to the side of the bus bar away from the separator or to the side of the bus bar close to the separator;

[0018] A circuit board, and the connecting member is connected to the circuit board.

[0019] Beneficial effects: Since the connecting member is located on the side of the bus bar away from the separator, there is a space between the circuit board and the separator, ensuring sufficient installation space for the circuit board and avoiding damage to the circuit board.

[0020] In an alternative embodiment, it further includes:

[0021] A connecting piece, connected to the side of the busbar close to the partition board; a circuit board, and the connecting piece is connected to the circuit board.

[0022] In an alternative embodiment, an observation hole is provided on the partition board, and the observation hole is located above the connecting piece and exposes part or all of the connecting piece.

[0023] Advantageous effects: It is possible to observe the welding position of the busbar and the connecting piece on the circuit board through the observation hole to determine whether the welding between the busbar and the connecting piece on the circuit board is qualified.

[0024] In an alternative embodiment, it further includes:

[0025] A support bar, the first side of which is connected to the side of the circuit board away from the partition board, and the second side of the support bar is adapted to abut against the battery cell.

[0026] Advantageous effects: When welding the busbar to the pole of the battery cell, the support bar abuts against the battery cell, playing a supporting role for the circuit board to prevent the circuit board from being bent and damaged, and can also play a fixing role when welding the busbar 1 to the pole of the battery cell.

[0027] In an alternative embodiment, an operation hole is provided on the partition board, and the operation hole is adapted to expose the connection position between the busbar and the pole of the battery cell.

[0028] Advantageous effects: Through the operation hole, the welding position between the busbar and the pole of the battery cell can be exposed. Thus, it is convenient to perform welding operations on the busbar and the pole of the battery cell, and avoid misalignment during welding.

[0029] In a second aspect, the present invention further provides a battery pack, including: the integrated busbar as described above arbitrarily.

[0030] Advantageous effects: The effects of this battery pack are the same as those of the integrated busbar, so they will not be elaborated here.

[0031] In an alternative embodiment, it further includes a battery cell, the busbar is adapted to be welded to the pole of the battery cell, and the partition board is located on the side of the busbar away from the battery cell.

[0032] Advantageous effects: Since the partition board is located on the side of the busbar away from the battery cell. It is more convenient to disassemble the partition board. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 Schematic diagram of the connection between the limit posts and limit holes of an integrated busbar according to an embodiment of the present utility model;

[0035] Figure 2 Schematic diagram of the structure of an integrated busbar according to an embodiment of the present utility model;

[0036] Figure 3 For Figure 2 Partial enlarged schematic diagram of A in

[0037] Figure 4 Exploded view of an integrated busbar according to an embodiment of the present utility model;

[0038] Figure 5 For Figure 4 Partial enlarged schematic diagram of B in

[0039] Figure 6 Schematic diagram of the isolation plate structure of an integrated busbar according to an embodiment of the present utility model;

[0040] Figure 7 For Figure 6 Partial enlarged schematic diagram of C in

[0041] Explanation of reference numerals:

[0042] 1. Busbar; 2. Isolation plate; 3. Limit post; 4. Limit hole; 5. Reinforcing rib; 6. Intermediate sleeve; 7. Operation hole; 8. Circuit board; 9. Observation hole; 10. Support bar; 11. Connector. Specific embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0044] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 7 , to describe the embodiments of the present utility model.

[0045] According to an embodiment of the present utility model, on the one hand, an integrated busbar is provided, as Figure 2 shown, including a busbar 1 and a separator 2. A plurality of busbars 1 are provided and are connected to the separator 2 one by one. A connection position is provided on the side of the busbar 1 away from the separator 2. After aligning the connection position on the busbar 1 with the cell pole column, welding is performed to complete the connection between the busbar 1 and the cell pole column.

[0046] For the connection between the busbar 1 and the separator 2, as Figure 1 shown, a limiting post 3 is provided on the side of the separator 2 close to the busbar, and a limiting hole 4 is opened on the busbar 1. The limiting post 3 and the limiting hole 4 are correspondingly arranged, and the limiting post 3 is inserted into the limiting hole 4 to limit the limiting post 3 from leaving the limiting hole 4, so as to connect the busbar 1 to the separator 2 and prevent the busbar 1 from detaching. At this time, the limiting post 3 can be pulled out of the limiting hole 4 with force to remove the separator 2 from the busbar 1.

[0047] The busbar 1 and the separator 2 in the integrated busbar are assembled by inserting the limiting post 3 of the separator 2 into the limiting hole 4 of the busbar 1. When the integrated busbar is installed on the cell, the sides of each busbar 1 of the integrated busbar away from the separator 2 are respectively welded to the corresponding cell pole columns. Since the separator 2 is located on the side of the busbar 1 away from the cell, at this time, the limiting post 33 can be pulled out of the limiting hole 4, so that the separator 2 can be removed, which not only reduces the weight of the entire battery pack, but also eliminates the combustion risk of the non-metallic separator 2.

[0048] Moreover, after the separator 2 is removed, the separator 2 can be reused and can be used as a tooling again to fix other busbars 1, reducing the cost.

[0049] The limiting post 3 can be integrally provided with the separator 2 or detachably connected.

[0050] In some embodiments, as Figure 1 shown, the integrated busbar further includes an intermediate sleeve 6. The intermediate sleeve 6 is made of a soft material, which can be a rubber sleeve or a cotton sleeve. After the intermediate sleeve 6 is sleeved on the limiting post 3, the limiting post 3 is inserted into the limiting hole 4 of the busbar 1. Thus, the intermediate sleeve 6 is arranged between the limiting post 3 and the limiting hole 4, and the limiting hole 4 presses the intermediate sleeve 6 towards the direction close to the outer wall of the limiting post 3. Thus, the inner wall of the intermediate sleeve 6 abuts against the outer wall of the limiting post 3, and the inner wall of the limiting hole 4 of the busbar 1 abuts against the outer wall of the intermediate sleeve 6. With such a setting, the intermediate sleeve 6 plays a buffering role between the limiting post 3 and the limiting hole 4, avoiding direct contact between the busbar 1 and the limiting post 3 and causing damage to the busbar 1. When it is necessary to remove the separator, the limiting post 3 can be pulled out of the limiting hole 4 with force.

[0051] In a further embodiment, after the intermediate sleeve 6 is sleeved on the limit post 3, the inner wall of the intermediate sleeve 6 is fixedly connected to the outer wall of the limit post 3. When the limit hole 4 of the bus bar 1 is sleeved on the intermediate sleeve 6, it prevents the intermediate sleeve 6 from axially displacing along the limit post 3, resulting in the bus bar 1 not being properly sleeved.

[0052] Specifically, before sleeving the intermediate sleeve 6, glue can be applied to the outer wall of the limit post 3. After the intermediate sleeve 6 is sleeved on the limit post 3, the intermediate sleeve 6 and the limit post 3 are adhesively fixed through the glue.

[0053] Alternatively, a rubber strip is wound around the outer wall of the limit post 3 to form the intermediate sleeve 6, so that the intermediate sleeve 6 is fixedly connected to the limit post 3.

[0054] In another further embodiment, as Figure 4 and Figure 5 shown, at least two limit holes 4 are provided on each bus bar 1, which can be two. The same number of limit posts 3 are correspondingly provided at the corresponding positions on the separator plate 2. When connecting the bus bar 1 and the separator plate 2, the two limit posts 3 are inserted into the corresponding limit holes 4 on the bus bar 1 one by one. Thus, the bus bar 1 is connected to the separator plate 2 through the two limit posts 3, making the connection between the bus bar 1 and the separator plate 2 more stable and reliable.

[0055] In some embodiments, as Figure 6 and Figure 7 shown, a plurality of reinforcing ribs 5 are provided on the separator plate 2. There is a reinforcing area on the separator plate 2. When manufacturing the separator plate 2, the reinforcing area on the separator plate 2 is raised to form strip-shaped reinforcing ribs 5. When the bus bar 1 is installed on the separator plate 2, the raising direction is away from the separator plate 2. Among them, the plurality of reinforcing ribs 5 are all strip-shaped and are sequentially arranged along the surface of the separator plate 2. For the separator plate 2, the presence of the reinforcing ribs 5 makes it not easy to bend at the position where they are located. Thus, the plurality of reinforcing ribs 5 increase the strength of the separator plate 2. It prevents the separator plate 2 from bending and affecting the positioning and fixing of the bus bar 1, and even causing the bus bar 1 to fall and be damaged.

[0056] Among them, in the vertical direction, the position of the reinforcing rib 5 is staggered from the installation position of the bus bar 1 to prevent the reinforcing rib 5 from affecting the installation of the bus bar 1.

[0057] In some embodiments, as Figures 2 to 5 shown, it further includes: a connector 11 and a circuit board 8. There is a connector on the circuit board 8. The connector 11 is welded on the side of the bus bar 1 close to the separator plate 2, so that the bus bar 1 is electrically connected to the circuit board 8. The circuit board 8 is welded to the bus bar 1 through the connector to collect voltage data or temperature data of the battery cells, etc. Among them, the circuit board 8 can be a PCB circuit board or an FPC circuit board, the connector can be a nickel sheet, and the circuit board 8 can be electrically connected to other devices through an FFC cable.

[0058] In some other embodiments, the connecting member 11 is welded to one side of the bus bar 1 away from the partition board and on one side of the partition board 2, so that there is a space between the circuit board 8 and the partition board, ensuring that the circuit board 8 has sufficient installation space and preventing the circuit board 8 from being damaged.

[0059] In a further embodiment, as Figures 2 to 7 shown, an observation hole 9 is provided on the partition board 2. In the direction perpendicular to the partition board 2, the observation hole 9 is located above the position of the connecting member 11. Through the observation hole 9, part or all of the connecting member 11 can be exposed. For example, when the connecting member 11 is connected to the side of the bus bar 1 away from the partition board 2, the observation hole 9 exposes part of the connecting member 11, facilitating the operator to observe the connecting member 11 through the observation hole 9 before installing the integrated bus bar to determine whether the welding between the connecting member 11 and the circuit board 8 is qualified; for another example, when the connecting member 11 is connected to the side of the bus bar 1 close to the partition board 2, the observation hole 9 exposes all of the connecting member 11, facilitating the operator to observe the connecting member 11 through the observation hole 9 before installing the integrated bus bar to determine whether the welding between the connecting member 11 and the bus bar 1 and between the connecting member 11 and the circuit board 8 is qualified. This avoids the unreliable connection caused by the welding of the connecting member 11 becoming loose after the integrated bus bar is installed, resulting in rework and affecting work efficiency, and even causing damage to the overall battery pack in the later stage.

[0060] In other further embodiments, as Figures 2 to 5 shown, the integrated bus bar further includes a support bar 10. The first side of the support bar 10 is connected to the side of the circuit board 8 away from the partition board 2. When the bus bar 1 is welded to the pole of the battery cell, the second side of the support bar 10 is close to and abuts against the battery cell, playing a supporting role for the circuit board 8 and preventing the circuit board 8 from being bent and damaged.

[0061] Glue can be provided on the side of the support bar 10 close to the battery cell. When the second side of the support bar 10 abuts against the battery cell, the support bar 10 is bonded to the battery cell, playing a certain fixing role. It can not only support the circuit board 8, but also play a fixing role when the bus bar 1 is welded to the pole of the battery cell.

[0062] The support bar 10 can be a foam strip with an adhesive on the back.

[0063] In another further embodiment, as Figures 2 to 7 shown, an operation hole 7 is provided on the partition board 2. In the direction perpendicular to the partition board 2, the operation hole 7 is located above the position where the bus bar 1 is welded to the pole of the battery cell. Through the operation hole 7, the position where the bus bar 1 is welded to the pole of the battery cell can be exposed. Thus, it is convenient to perform the welding operation between the bus bar 1 and the pole of the battery cell, and avoid misalignment during welding.

[0064] According to an embodiment of the present utility model, on the other hand, a battery pack is further provided, which includes the integrated busbar described above in any of the descriptions. The effects of this battery pack are the same as those of the integrated busbar, so they will not be elaborated here.

[0065] In some embodiments, the battery pack further includes battery cells. After welding the busbar 1 to the pole posts of the battery cells, the separator 2 is located on the side of the busbar 1 away from the battery cells, facilitating the removal of the separator 2.

[0066] For the sake of easy understanding, the battery pack will be exemplarily described below. The battery pack includes a plurality of stacked battery cells. Above the plurality of stacked battery cells, the integrated busbar provided in any of the above embodiments is provided, and the busbar 1 in the integrated busbar is welded to the pole posts of the battery cells. Before the integrated busbar is installed above the plurality of battery cells, the busbar 1 and the separator 2 can be assembled by inserting the limiting posts 3 into the limiting holes 4 first, and then the circuit board 8 is placed between the two rows of busbars 1 and is respectively connected to the plurality of busbars 1 one by one through a plurality of connectors 11. A support bar is provided on the side of the circuit board 8 away from the separator 2. When the integrated busbar is installed above the plurality of battery cells, the busbar 1 is correspondingly connected to the pole posts of the battery cells and the support bar is abutted against the tops of the battery cells, and then the separator 2 is removed to complete the assembly of the battery pack.

[0067] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An integrated busbar, characterized in that, Comprising: A bus bar (1), on which a limiting hole (4) is provided; An isolation plate (2), on one side of the isolation plate (2) close to the bus bar (1), a limiting post (3) is provided, the limiting post (3) is arranged corresponding to the limiting hole (4), and the limiting post (3) is adapted to be detachably inserted into the limiting hole (4).

2. The integrated busbar according to claim 1, wherein, Further comprising: An intermediate sleeve (6), arranged between the limiting post (3) and the limiting hole (4), the bus bar (1) is adapted to be sleeved on the intermediate sleeve (6) through the limiting hole (4) and press the intermediate sleeve (6) in the direction close to the limiting post (3).

3. The integrated busbar according to claim 2, wherein The inner wall of the intermediate sleeve (6) is fixedly connected to the outer wall of the limiting post (3).

4. The integrated busbar according to claim 1, wherein On the isolation plate (2), a strengthening area is provided, and the strengthening area of the isolation plate (2) bulges away from the bus bar (1) to form a strengthening rib (5).

5. The integrated busbar according to claim 1, characterized in that, Further comprising: A connecting piece (11), connected to the side of the bus bar (1) away from the isolation plate (2) or connected to the side of the bus bar (1) close to the isolation plate (2); A circuit board (8), the connecting piece (11) is connected to the circuit board (8).

6. The integrated busbar according to claim 5, characterized in that, An observation hole (9) is opened on the isolation plate (2), the observation hole (9) is located above the connecting piece (11) and exposes part or all of the connecting piece (11).

7. The integrated busbar according to claim 5, wherein, Further comprising: A support bar (10), the first side of the support bar (10) is connected to the side of the circuit board (8) away from the isolation plate (2), and the second side of the support bar (10) is adapted to abut against the battery cell.

8. The integrated busbar according to claim 1, wherein, An operation hole (7) is opened on the isolation plate (2), and the operation hole (7) is adapted to expose the connection position between the bus bar (1) and the battery cell terminal.

9. A battery pack, characterized in that, Comprising the integrated bus bar according to any one of claims 1-8.

10. The battery pack according to claim 9, characterized in that, Further comprising a battery cell, the bus bar (1) is adapted to be welded to the terminal of the battery cell, and the isolation plate (2) is located on the side of the bus bar (1) away from the battery cell.

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