Battery cell holder and battery pack

Abstract

The utility model belongs to the technical field of battery pack, propose a kind of electric core support and battery pack, wherein, a kind of electric core support includes pedestal, the upper surface of the pedestal is provided with the electrode slot of through, the electrode slot is located at pedestal near end portion department;The upper surface of the pedestal is provided with fixed mechanism, and fixed mechanism is located between adjacent electrode slot;Through fixed mechanism, line harness structure is fixed, it is convenient for nickel sheet and pole piece to carry out laser welding, to prevent pole piece and nickel sheet misplacement in turn, to improve laser welding quality and prevent the generation of such as the phenomenon of uneven welding or weld point;Meanwhile, the electric core buckle can be recycled when electric core is recycled, reduce resource waste;The electric core structure is adapted to trayless module structure, reduce cost.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and specifically relates to a cell support and battery pack. Background Technology

[0002] In the production process of lithium-ion power batteries without a tray structure, the module acquisition method is the ultimate cost reduction solution of wire harness acquisition. The wire harness acquisition nickel sheet and the module electrode sheet still need to be fixed together. Currently, one method of fixing is to use laser welding. Laser welding has the advantages of high positioning accuracy, fast welding speed and good welding quality. However, in order to ensure the quality of laser welding, the wire harness acquisition nickel sheet and the module electrode sheet need to be accurately positioned. Once the wire harness acquisition nickel sheet and the cell electrode sheet are slightly misaligned, the quality of laser welding will be seriously affected, resulting in missed welding or uneven welding points, which will affect the acquisition during the use of the battery pack.

[0003] One existing method for fixing wire harnesses involves using a wire harness tape with adhesive at the bottom. During the use of the battery pack, the cells heat up, which causes the adhesive effect to deteriorate and the tape to fall off. This affects the connection structure between the wire harness collecting nickel sheets and the module electrode sheets, and it cannot be reused.

[0004] The second existing method for securing wire harnesses involves using wire harness fixing clips. However, existing wire harness fixing clips have the following drawbacks. 1. The existing wire harness fixing clips have no fixed structure and are easy to rotate, which can easily cause the nickel sheet to be poorly welded. If the rotation is severe, it will affect the performance of the battery pack. 2. The existing wire harness clip structure is similar to a high-legged strip, which occupies Z-axis space during use and affects the space utilization of the battery pack; 3. The existing wire harness fixing clips are disposable products and cannot be reused, resulting in a waste of data.

[0005] Therefore, there is an urgent need for a new type of cell support with an anti-rotation structure to solve the above problems. Utility Model Content

[0006] To address the aforementioned problems, this utility model proposes a battery cell support, including a base, wherein a through electrode slot is provided on the upper surface of the base, the electrode slot being located near the end of the base; a fixing mechanism is provided on the upper surface of the base, and the fixing mechanism is located between adjacent electrode slots.

[0007] Furthermore, a limiting buckle is provided on the upper surface of the base, and the limiting buckle is located between the electrode slot and the fixing mechanism.

[0008] Furthermore, the electrode slots include a negative electrode slot and a positive electrode slot, which are located on the upper surface of the base near both ends.

[0009] Furthermore, the upper surface of the base is provided with a first rivet hole, which is located on the side of the positive electrode slot near the limiting buckle, and the positive electrode slot and the first rivet hole are connected.

[0010] Furthermore, the fixing mechanism includes a first strip and a second strip, and the upper surface of the base is provided with two slots, which are directly opposite the first strip and the second strip; and the two slots are located between the negative electrode slot and the positive electrode slot.

[0011] Furthermore, the upper surface of the base is provided with a second rivet hole, which is located between the positive electrode slot and the slot.

[0012] Furthermore, the upper surface of the base is provided with a hollow groove, which is located between adjacent slots.

[0013] A battery pack includes a battery cell, a nickel sheet, a wiring harness structure, and the aforementioned battery cell support. The battery cell support is fixedly mounted on the battery cell, and the electrode slots of the battery cell support are aligned with the electrodes of the battery cell. The electrodes pass through the electrode slots and are fixedly connected to the electrode sheets. The wiring harness structure is fixedly mounted in a fixing mechanism, and the wiring harness structure is electrically connected to the nickel sheet, which is also fixedly connected to the electrode sheets.

[0014] Furthermore, the positive and negative slots of the battery cell bracket correspond to the positive and negative terminals of the battery cell, respectively, and the first and second electrode plates are fixedly installed on the positive and negative terminals of the battery cell, respectively, with the first and second electrode plates located on the outer side of the base.

[0015] Furthermore, the wire harness structure includes a first wire harness and a second wire harness, which are respectively installed in the first and second strips of the fixing mechanism; the nickel sheet is connected to the first or second wire harness via a wire, which is snapped into a limiting buckle.

[0016] The beneficial effects of this utility model are: 1. The battery cell support of this utility model includes a base, and a through electrode slot is provided on the upper surface of the base. The electrode slot is located near both ends of the base. A fixing mechanism is provided on the upper surface of the base, and the fixing mechanism is located between two adjacent electrode slots. The fixing mechanism fixes the wire harness structure, which facilitates laser welding of nickel sheets and electrode sheets, thereby preventing misalignment of electrode sheets and nickel sheets, improving the quality of laser welding and preventing phenomena such as incomplete welding or uneven welding points. At the same time, the battery cell clip can be reused when the battery cell is recycled, reducing resource waste. The battery cell structure is compatible with trayless module structures, reducing costs.

[0017] 2. The fixing mechanism of the battery cell bracket of this utility model includes a first strip and a second strip. The upper surface of the base is provided with two slots, which are located between the negative terminal slot and the positive terminal slot. The first strip and the second strip are respectively fixedly installed on the upper surface of the two slots. The middle strip (first strip and second strip) of the battery cell bracket can increase the reliability of the wire harness structure fixing, effectively prevent the rotation during the driving of the car on bumpy roads, and reduce the failure rate of parts. The middle strip (first strip and second strip) of the bracket can be adapted to wire harness structures of different thicknesses, and has strong adaptability.

[0018] 3. The upper surface of the base of the battery cell bracket of this utility model is provided with a limiting buckle. The limiting buckle is located between the card slot and the positive electrode card slot and has an anti-rotation function, which can increase the fixation reliability and effectively prevent the nickel sheet and the module electrode (first electrode and second electrode) from rotating during welding, thereby improving the laser welding quality and preventing phenomena such as incomplete welding or uneven welding points. At the same time, the limiting buckle is set to reduce assembly steps and improve assembly efficiency.

[0019] 4. The battery pack of this utility model includes a battery cell, a nickel sheet, a wiring harness structure, and a battery cell support. The battery cell support is fixedly installed on the battery cell, and the electrode slot of the battery cell support is aligned with the electrode of the battery cell. The electrode passes through the electrode slot and is fixedly connected to the electrode sheet. The wiring harness structure is fixedly installed in the fixing mechanism and is electrically connected to the nickel sheet. The nickel sheet is also fixedly connected to the electrode sheet. By setting the battery cell support, the electrode sheet and the wiring harness (first wiring harness and second wiring harness) are fixed when the nickel sheet and the electrode sheet are laser welded. This prevents the nickel sheet from being misaligned during the laser welding of the electrode sheet and the nickel sheet, which would result in an unstable weld, a loose circuit connection, and damage to the battery.

[0020] 5. This patent provides a cell support with an anti-rotation structure. The support is reusable, reducing resource waste. The limiting buckle set on the cell support prevents the nickel sheet from rotating during the welding process, greatly reducing assembly complexity and part failure rate. The middle part is provided with a strip (first strip and second strip), which can be adapted to wire harness structures of different thicknesses, with strong adaptability and good Z-axis space utilization.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A three-dimensional schematic diagram of the cell support in an embodiment of this utility model is shown.

[0024] Figure 2 A front view schematic diagram of the battery cell support in an embodiment of this utility model is shown.

[0025] Figure 3 A side view of the battery cell support in an embodiment of this utility model is shown.

[0026] Figure 4 A partial schematic diagram of the battery pack in an embodiment of the present invention is shown.

[0027] Figure 5 It shows Figure 4 A magnified view of a portion of point A in the middle.

[0028] In the diagram, 1 is the negative electrode slot; 2 is the base; 21 is the slot; 3 is the hollowed-out groove; 4 is the limiting buckle; 5 is the first rivet hole; 6 is the positive electrode slot; 7 is the second rivet hole; 8 is the first rolled strip; and 9 is the second rolled strip. 10. First electrode; 11. Positive electrode of battery cell; 12. Explosion-proof valve; 13. Second electrode; 14. Negative electrode of battery cell; 15. Rivet; 16. Nickel sheet; 17. First wiring harness; 18. Second wiring harness. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example 1, refer to Figure 1 A battery cell support includes a base 2, with through electrode slots on the upper surface of the base 2 located near both ends of the base 2; a fixing mechanism is provided on the upper surface of the base 2, and the fixing mechanism is located between two adjacent electrode slots.

[0031] Specifically, by installing this utility model onto the end of the battery cell, and then placing the electrode of the battery cell in the electrode slot, the wire harness structure is fixed by a fixing mechanism. This facilitates laser welding of the electrode sheet and the nickel sheet 16, thereby preventing misalignment between the electrode sheet and the nickel sheet 16, improving the quality of laser welding, and preventing phenomena such as incomplete welding or uneven weld points. Simultaneously, this battery cell clip can be reused during battery cell recycling, reducing resource waste. This battery cell structure is compatible with trayless module structures, reducing costs. (Reference) Figure 1 The electrode slots include a negative electrode slot 1 and a positive electrode slot 6, which are located on the upper surface of the base 2 near both ends. Specifically, the bracket is directly fixed to the negative electrode 14 and the positive electrode 11 of the battery cell via the negative electrode slot 1 and the positive electrode slot 6, respectively. The second electrode 13 and the first electrode 10 are welded to the negative electrode 14 and the positive electrode 11 of the battery cell by laser welding, effectively preventing the bracket from rotating on the module.

[0032] Furthermore, the fixing mechanism includes a first strip 8 and a second strip 9. Two slots 21 are provided on the upper surface of the base 2, directly opposite the first strip 8 and the second strip 9. These slots 21 are located between the negative electrode slot 1 and the positive electrode slot 6. By setting the slots 21, the height of the first strip 8 and the second strip 9 is reduced, thereby reducing the Z-axis height of the battery. Specifically, the strips (first strip 8 and second strip 9) installed in the middle of the cell bracket can increase the reliability of fixing the first wire harness 17 and the second wire harness 18, effectively preventing the wire harness structure from rotating during vehicle travel on bumpy roads and reducing the component failure rate. The strips (first strip 8 and second strip 9) in the middle of the bracket can adapt to wire harness structures of different thicknesses, exhibiting strong adaptability. Two sets of slots 21 are provided on the upper surface of the base 2, with the first strip 8 and the second strip 9 respectively installed on the two sets of slots 21.

[0033] Furthermore, a limiting buckle 4 is provided on the upper surface of the base 2, and the limiting buckle 4 is located between the slot 21 and the positive electrode slot 6. Specifically, the limiting buckle 4 on the bracket has an anti-rotation function, which can increase the fixation reliability and effectively prevent the nickel sheet 16 and the module electrode (first electrode 10 and second electrode 13) from rotating during welding, which would seriously affect the quality of laser welding, resulting in incomplete welding or uneven weld points. At the same time, the limiting buckle 4 reduces assembly steps and improves assembly efficiency.

[0034] Specifically, a second rivet hole 7 is provided on the upper surface of the base 2, and the second rivet hole 7 is located between the positive electrode slot 6 and the slot 21. The second rivet hole 7 is used to fix the temperature sensor, which facilitates the detection of the cell temperature.

[0035] Furthermore, the upper surface of the base 2 is provided with a first rivet hole 5, which is located on the side of the positive electrode slot 6 near the limiting buckle 4, and the positive electrode slot 6 and the first rivet hole 5 are connected. Specifically, the first rivet hole 5 is provided to facilitate the placement of rivets 15, which are used to fix the nickel sheet 16, thereby facilitating the fixation of the nickel sheet 16 and improving the effect of fixing the tail wire of the wire harness to the nickel sheet 16.

[0036] refer to Figure 1 The upper surface of the base 2 is provided with a hollow groove 3, which is located between adjacent slots 21. Specifically, the hollow groove 3 is provided in the middle of the bracket, which does not affect the release of the cell explosion-proof valve 12.

[0037] Example 2, like Figure 1 As shown, the battery cell support includes a negative electrode slot 1, a base 2, a slot 21, a hollowed-out groove 3, a limiting buckle 4, a first rivet hole 5, a positive electrode slot 6, a second rivet hole 7, a first rolled strip 8, and a second rolled strip 9 (for reference). Figure 2 The base 2 is a rectangular plate. Near the two ends of the upper surface of the base 2, there are negative electrode slots 1 and positive electrode slots 6. Two slots 21 are located between the negative electrode slots 1 and positive electrode slots 6 on the upper surface of the base 2. A perforated groove 3 is located between the two slots 21 on the upper surface of the base 2. The perforated groove 3 has two rectangular recesses that penetrate the base 2. Two sets of connecting structures are provided on the upper surface of the base 2. The two sets of connecting structures are respectively equipped with a first strip 8 and a second strip 9. The first strip 8 and the second strip 9 are used to secure the first wire harness 17 and the second wire harness 18. The upper surface of the base 2 is provided with a limiting buckle 4, which is located between the first strip 8 and the positive electrode slot 6. The limiting buckle 4 is used to fix the tail wire of the first wire harness 17 (i.e., the wire connecting the first wire harness 17 or the second wire harness 18 to the nickel sheet 16). The upper surface of the base 2 is provided with a second rivet hole 7, which is located between the slot 21 and the positive electrode slot 6. The second rivet hole 7 is located on one side of the limiting buckle 4 and is used to install a temperature sensor. The upper surface of the base 2 is provided with a first rivet hole 5, which is located in communication with the positive electrode slot 6 and is located at the corner of the positive electrode slot 6.

[0038] The bracket is directly fixed to the negative electrode 14 and positive electrode 11 of the battery cell via the negative electrode slot 1 and positive electrode slot 6, respectively. The second electrode 13 and the first electrode 10 are welded to the negative electrode 14 and positive electrode 11 of the battery cell by laser welding, which effectively prevents the bracket from rotating on the module. The first strip 8 and the second strip 9 are used to fix the first wire harness 17 and the second wire harness 18. The first wire harness 17 and the second wire harness 18 are electrically connected to different nickel sheets 16. The nickel sheets 16 are electrically connected to the first electrode 10 or the second electrode 13. The nickel sheets 16 are fixedly connected to the first rivet hole 5 of the base 2 by rivets 15. The rivets 15 play a role in fixing the connection.

[0039] Example 3, refer to Figure 4 A battery pack includes a battery cell, a nickel sheet 16, a wiring harness structure, and a battery cell support according to Embodiment 1 or Embodiment 2. The battery cell support is fixedly mounted on the battery cell, with the electrode slots of the battery cell support facing the electrodes of the battery cell. The electrodes pass through the electrode slots and are fixedly connected to the electrode sheets. The wiring harness structure is fixedly mounted in a fixing mechanism and is electrically connected to the nickel sheet 16, which is also fixedly connected to the electrode sheets. By setting the battery cell support, the electrode sheets and wiring harnesses (first wiring harness 17 and second wiring harness 18) are fixed during laser welding of the nickel sheet 16 and the electrode sheets. This prevents the electrode sheets from misaligning during laser welding, which could lead to weak welding, loose circuit connections, and ultimately, battery damage.

[0040] refer to Figure 5 The positive electrode slot 6 and negative electrode slot 1 of the battery cell bracket correspond to the positive electrode 11 and negative electrode 14 of the battery cell, respectively. The first electrode 10 and the second electrode 13 are fixedly installed on the positive electrode 11 and the negative electrode 14 of the battery cell, respectively. The first electrode 10 and the second electrode 13 are located on the outside of the base 2. Specifically, the first electrode 10 is laser welded to the positive electrode 11 of the battery cell, and the second electrode 13 is laser welded to the negative electrode 14 of the battery cell.

[0041] refer to Figure 4 The wire harness structure includes a first wire harness 17 and a second wire harness 18, which are respectively installed in the first strip 8 and the second strip 9 of the fixing mechanism; a nickel sheet 16 on one side is connected to the first wire harness 17 by a wire, which is snapped into the limiting buckle 4; a nickel sheet 16 on the other side is connected to the second wire harness 18 by a wire, which is snapped into the limiting buckle 4.

[0042] like Figure 5As shown, one end of the nickel sheet 16 is fixed to the first electrode 10 through an opening and a rivet 15. The tail wire harness is limited by a limiting buckle 4, which limits the nickel sheet 16 between the two, thereby enabling efficient welding of the nickel sheet 16 to the first electrode 10 without rotation. The first wire harness 17 and the second wire harness 18 are respectively fixed to the cell support by the first strip 8 and the second strip 9, which can be adapted to different thicknesses of the first wire harness 17, making it highly versatile.

[0043] This patent provides a novel battery cell holder with an anti-rotation structure. This holder is reusable, reducing resource waste; a limiting buckle 4 (see reference) is provided on the battery cell holder. Figure 3 This prevents the nickel sheet 16 from rotating during the welding process, greatly reducing assembly complexity and part failure rate; the middle part is provided with strips (first strip 8 and second strip 9) which can be adapted to wire harness structures of different thicknesses, with strong adaptability, and can be used to fix the wire harness structure, which is beneficial to the utilization of Z-axis space.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cell support, characterized in that, Includes a base (2), the upper surface of which is provided with a through electrode slot, the electrode slot being located near the end of the base (2); the upper surface of the base (2) is provided with a fixing mechanism, and the fixing mechanism is located between adjacent electrode slots.

2. The cell support according to claim 1, characterized in that, The upper surface of the base (2) is provided with a limiting buckle (4), which is located between the electrode slot and the fixing mechanism.

3. A cell support according to claim 1 or 2, characterized in that, The electrode slots include a negative electrode slot (1) and a positive electrode slot (6), which are located on the upper surface of the base (2) near both ends.

4. A cell support according to claim 3, characterized in that, The upper surface of the base (2) is provided with a first rivet hole (5), which is located on the side of the positive electrode slot (6) near the limiting buckle (4), and the positive electrode slot (6) and the first rivet hole (5) are connected.

5. A cell support according to claim 3, characterized in that, The fixing mechanism includes a first strip (8) and a second strip (9). The upper surface of the base (2) is provided with two slots (21), which are directly opposite the first strip (8) and the second strip (9). The two slots (21) are located between the negative electrode slot (1) and the positive electrode slot (6).

6. A cell support according to claim 5, characterized in that, The upper surface of the base (2) is provided with a second rivet hole (7), which is located between the positive electrode slot (6) and the slot (21).

7. A cell support according to claim 5, characterized in that, The upper surface of the base (2) is provided with a hollow groove (3), which is located between adjacent slots (21).

8. A battery pack, characterized in that, The device includes a battery cell, a nickel sheet (16), a wire harness structure, and a battery cell support as described in any one of claims 1-7. The battery cell support is fixedly installed on the battery cell, and the electrode slot of the battery cell support is directly opposite the electrode of the battery cell. The electrode passes through the electrode slot and is fixedly connected to the electrode sheet. The wire harness structure is fixedly installed in a fixing mechanism, and the wire harness structure is electrically connected to the nickel sheet (16). The nickel sheet (16) is fixedly connected to the electrode sheet.

9. A battery pack according to claim 8, characterized in that, The positive electrode slot (6) and negative electrode slot (1) of the battery cell bracket correspond to the positive electrode (11) and negative electrode (14) of the battery cell, respectively. The electrode includes a first electrode (10) and a second electrode (13). The first electrode (10) and the second electrode (13) are fixedly installed on the positive electrode (11) and the negative electrode (14) of the battery cell, respectively. The first electrode (10) and the second electrode (13) are located on the outside of the base (2).

10. A battery pack according to claim 9, characterized in that, The wire harness structure includes a first wire harness (17) and a second wire harness (18), the first wire harness (17) and the second wire harness (18) being respectively installed in the first strip (8) and the second strip (9) of the fixing mechanism; the nickel sheet (16) is connected to the first wire harness (17) or the second wire harness (18) by a wire, and the wire is snapped into the limiting buckle (4).

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