Battery module pole piece structure

Abstract

The utility model belongs to a battery module pole piece structure in the technical field of power batteries. A plurality of fixing studs (2) are arranged on the upper surface of the pole piece body (1), a fool-proof notch (3) is formed in the side edge of the pole piece body (1), the lower surface of the pole piece body (1) is connected with a battery cell (4), the upper surface of the pole piece body (1) is connected with a series copper bar (5), and each fixing stud (2) on the upper surface of the pole piece body (1) is of a structure capable of penetrating through a positioning hole in the series copper bar (5). The battery module pole piece structure disclosed by the utility model is simple in structure, reliable positioning and connection of the pole piece and the series copper bar are realized, the contact area is increased, the overcurrent capability is enhanced, and reliable working performance of the battery module is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and more specifically, relates to a battery module pole piece structure. Background Art

[0002] The battery module needs to be equipped with positive and negative electrodes, and both the positive and negative electrodes need to be connected to the battery cell. In the structure of the prior art, the electrode and the series copper bus are positioned by mechanical connection (locking screws or nuts), which cannot ensure that the electrode and the series copper bus are reliably positioned when connected, and cannot ensure that the two are always in reliable contact, which affects the contact area and the overcurrent capacity. On the other hand, the electrode structure is the same, and the positive and negative electrodes are easily installed incorrectly, resulting in rework.

[0003] In the prior art, there is a technology named "battery module" and the publication number is "WO2019148614A1", which relates to a battery module, which includes a single cell and an electrode connecting piece, the single cell includes a top cover and a pole, the electrode connecting piece includes a pole connecting part and a supporting part, wherein: the pole connecting part is connected to the pole of the single cell; the supporting part is connected to the pole connecting part, and the supporting part is supported on the top cover. The battery module provided in this application can prevent the problem of connection failure of the sampling line.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a battery module pole piece structure with a simple structure is provided, which can realize reliable positioning and connection of pole pieces and series copper bars, increase the contact area of ​​the pole piece connection structure, enhance the overcurrent capacity, and ensure reliable performance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is:

[0007] The utility model discloses a battery module pole piece structure, comprising a pole piece body, a plurality of fixing studs are arranged on the upper surface of the pole piece body, a fool-proof notch is arranged on the side of the pole piece body, a battery cell is connected to the lower surface of the pole piece body, a series copper bus is connected to the upper surface of the pole piece body, and each fixing stud on the upper surface of the pole piece body is arranged to be able to pass through a positioning hole on the series copper bus.

[0008] The pole piece body is clamped in the pole piece installation groove of the lower cover plate of the integrated cover plate, and a plurality of pole piece installation grooves are arranged on the lower cover plate of the integrated cover plate according to the gaps.

[0009] The fool-proof notch is clamped on the limiting protrusion of the pole piece installation groove.

[0010] The electrode body comprises a positive electrode body and a negative electrode body.

[0011] When the upper surface of the pole piece body is connected to the series copper bar, each fixing stud is located above the series copper bar and is configured to be screwed with a tightening nut.

[0012] A positioning hole is arranged on the pole piece body.

[0013] The positioning stud is fixed on the pole piece body by a riveting process.

[0014] The positive electrode sheet body and the negative electrode sheet body are structures made of aluminum.

[0015] Three fixing studs are arranged on the upper surface of the pole piece body.

[0016] The technical solution of the utility model is adopted, and the working principle and beneficial effects are as follows:

[0017] The battery module pole piece structure described in the utility model has a plurality of fixing studs on the upper surface of the pole piece body, and an anti-mistake notch is set at the side of the pole piece body. The fixing studs are used to achieve reliable positioning of the pole piece and the series copper busbar when the pole piece and the series copper busbar are connected, and the anti-mistake notch is used to ensure the unique position and avoid wrong installation when the pole piece is installed in the pole piece installation groove of the lower cover plate of the integrated cover plate. The connection method between the pole piece, the battery cell and the series copper busbar is improved. The lower surface of the pole piece body is connected to the battery cell, and the two are welded to ensure reliable fitting. At the same time, the upper surface of the pole piece body is connected to the series copper busbar, and each fixing stud on the upper surface of the pole piece body is set to a structure that can pass through a positioning hole on the series copper busbar. A tightening nut is then screwed on top of the fixing stud to achieve reliable fixation of the series copper busbar and the pole piece connection to avoid loosening. In this way, the contact area of ​​the pole piece connection structure is effectively increased and the overall overcurrent capacity is enhanced. While the fixing studs and tightening nuts effectively fix the series copper busbars, even if a single tightening nut is loose, the other tightening nuts are still tightened, thus ensuring that the pole piece and the series copper busbar are reliably connected during the use of the battery, avoiding affecting the product overcurrent and ensuring the reliable working performance of the battery product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a structural schematic diagram of the pole piece body of the battery module pole piece structure described in the utility model;

[0020] Figure 2 It is a structural schematic diagram of a battery module pole piece structure described in the utility model when the pole piece body is installed in the pole piece installation groove;

[0021] Figure 3 It is a partial cross-sectional structural schematic diagram of the pole piece, series copper bar and battery cell of the pole piece structure of the battery module described in the utility model when connected;

[0022] The markings in the attached drawings are: 1. Pole piece body; 2. Fixing studs; 3. Anti-mistake notch; 4. Battery cell; 5. Series copper busbar; 6. Integrated cover plate and lower cover plate; 7. Pole piece mounting groove; 8. Tightening nut; 9. Positioning hole. DETAILED DESCRIPTION

[0023] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connection relationships of the components involved, the functions and working principles of the components, etc., by referring to the accompanying drawings:

[0024] As attached Figure 1 -Attached Figure 3 As shown, the utility model is a battery module pole piece structure, including a pole piece body 1, a plurality of fixing studs 2 are arranged on the upper surface of the pole piece body 1, a foolproof notch 3 is arranged at the side of the pole piece body 1, a battery cell 4 is connected to the lower surface of the pole piece body 1, and a series copper bar 5 is connected to the upper surface of the pole piece body 1. Each fixing stud 2 on the upper surface of the pole piece body 1 is arranged to be able to pass through a positioning hole on the series copper bar 5. The above structure proposes an improved technical solution to the deficiencies in the prior art. On the one hand, the structure of the pole piece is improved, a plurality of fixing studs 2 are arranged on the upper surface of the pole piece body 1, and a foolproof notch 3 is arranged at the side of the pole piece body 1. The fixing studs 2 are used to achieve reliable positioning of the pole piece and the series copper bar 5 when the pole piece is connected, and the foolproof notch 3 is used to ensure the unique installation position when the pole piece is installed in the pole piece installation groove 7 of the lower cover plate 6 of the integrated cover plate to avoid wrong installation. On the other hand, the connection method between the pole piece and the battery cell 4 and the series copper bar 5 is improved. The lower surface of the pole piece body 1 is connected to the battery cell 4, and the two are welded to ensure reliable fitting, increase the contact area between the two, and enhance the overcurrent capability. At the same time, the upper surface of the pole piece body 1 is connected to the series copper bar 5, and each fixing stud 2 on the upper surface of the pole piece body 1 is set to a structure that can pass through a positioning hole on the series copper bar 5. The tightening nut 8 is screwed on the top of the fixing stud 2 to achieve reliable fixation of the connection between the series copper bar 5 and the pole piece to avoid loosening. While the fixing stud 2 and the tightening nut 8 effectively fix the series copper bar 5, even if a single tightening nut 8 is loosened, the other tightening nuts 8 are still tightened, which can still ensure that the pole piece and the series copper bar 5 are reliably connected during the use of the battery, avoid affecting overcurrent, and ensure reliable working performance. The battery module pole piece structure described in the utility model realizes reliable positioning and connection between the pole piece and the series copper bar, increases the contact area of ​​the pole piece connection structure, enhances the overcurrent capability, and ensures reliable performance.

[0025] The pole piece body 1 is clamped in the pole piece mounting groove 7 of the lower cover plate 6 of the integrated cover plate. A plurality of pole piece mounting grooves 7 are arranged on the lower cover plate 6 of the integrated cover plate according to the gap. The anti-mistake notch 3 is clamped on the limiting protrusion of the pole piece mounting groove. In the above structure, when each pole piece body 1 is installed, it is installed in the corresponding pole piece mounting groove 7 to be located above the corresponding battery cell 4, so as to facilitate each pole piece body 1 to be welded and connected to the corresponding battery cell 4. The anti-mistake notch 3 is used to prevent mistakes, and ensure that when the pole piece body 1 is placed in the pole piece mounting groove 7 at the corresponding position, the anti-mistake notch 3 can be clamped on the limiting protrusion of the pole piece mounting groove 7, otherwise the two cannot be accurately clamped. It realizes error prevention when the pole piece body 1 is installed in place, and improves the installation efficiency during installation.

[0026] The electrode body 1 includes a positive electrode body and a negative electrode body. In the above structure, the positive electrode body and the negative electrode body have the same structure and principle, and can achieve corresponding technical effects.

[0027] When the upper surface of the pole piece body 1 is connected to the series copper bar 5, each fixing stud 2 is located above the series copper bar 5 and is configured to be screwed with a tightening nut 8. In the above structure, after the tightening nut is tightened on the fixing stud, the series copper bar can be reliably pressed, ensuring that the series copper bar and the pole piece body are reliably fitted, effectively ensuring the contact area between the two, and improving performance.

[0028] The pole piece body 1 is provided with a positioning hole 9. In the above structure, when connecting, the pole piece and the center of the pole hole of the battery cell are observed through the positioning hole to ensure that the battery cell welding will not be biased.

[0029] The stud 2 is fixed to the pole piece body 1 by a riveting process. The above structure has low cost and good strength, and the pole piece body 1 and the fixing stud 2 will not break easily during use.

[0030] The positive electrode sheet body and the negative electrode sheet body are made of aluminum. In the above structure, the positive electrode sheet body and the negative electrode sheet body are made of aluminum, which has good conductivity and meets working requirements.

[0031] Three fixing studs 2 are provided on the upper surface of the pole piece body 1. With the above structure, the fixing studs 2 and the tightening nuts 8 can effectively fix the series copper bar 5. Even if a single tightening nut 8 is loosened, the other tightening nuts 8 are still tightened, which still ensures that the pole piece and the series copper bar 5 are reliably connected during the use of the battery, avoiding overcurrent and ensuring reliable working performance. The three fixing studs 2 are arranged in a triangle to improve the stability of the fixing of the pole piece body 1.

[0032] The battery module pole piece structure described in the utility model, on the one hand, improves the structure of the pole piece body (pole piece), a plurality of fixing studs 2 are arranged on the upper surface of the pole piece body 1, and a foolproof notch 3 is arranged on the side of the pole piece body 1. The fixing studs 2 are used to reliably position the pole piece and the series copper bar 5 when the pole piece is connected to the series copper bar 5, and the foolproof notch 3 is used to ensure the unique installation position and avoid wrong installation when the pole piece is installed in the pole piece installation groove 7 of the lower cover plate 6 of the integrated cover plate. On the other hand, the connection method between the pole piece and the battery cell 4 and the series copper bar 5 is improved. The lower surface of the pole piece body 1 is connected to the battery cell 4, and the two are welded to ensure reliable fit, increase the contact area between the two, and enhance the overcurrent capacity. At the same time, the upper surface of the pole piece body 1 is connected to the series copper bar 5, and each fixing stud 2 on the upper surface of the pole piece body 1 is set to a structure that can pass through a positioning hole on the series copper bar 5. Tightening nuts 8 are screwed on the fixing studs 2 to achieve reliable fixation of the series copper bar 5 and the pole piece connection to avoid loosening. While the fixing studs 2 and the tightening nuts 8 effectively fix the series copper busbars 5, even if a single tightening nut 8 is loosened, the other tightening nuts 8 are still tightened, thereby ensuring that the pole pieces and the series copper busbars 5 are reliably connected during the use of the battery, avoiding overcurrent and ensuring reliable working performance.

[0033] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A battery module pole piece structure, characterized in that: The invention comprises a pole piece body (1), a plurality of fixing studs (2) are arranged on the upper surface of the pole piece body (1), a foolproof notch (3) is arranged on the side of the pole piece body (1), the lower surface of the pole piece body (1) is connected to the battery cell (4), the upper surface of the pole piece body (1) is connected to the series copper busbar (5), and each fixing stud (2) on the upper surface of the pole piece body (1) is arranged to be able to pass through a positioning hole on the series copper busbar (5); The foolproof notch (3) is mounted on the limiting protrusion of the pole piece mounting groove; Three fixing studs (2) are provided on the upper surface of the pole piece body (1), and the three fixing studs (2) are arranged in a triangle; The pole piece coincides with the center of the battery cell pole hole.

2. The battery module pole piece structure according to claim 1, characterized in that: The pole piece body (1) is clamped in a pole piece installation groove (7) of the integrated cover plate lower cover plate (6), and a plurality of pole piece installation grooves (7) are provided on the integrated cover plate lower cover plate (6) at intervals.

3. The battery module pole piece structure according to claim 1 or 2, characterized in that: The electrode body (1) comprises a positive electrode body and a negative electrode body.

4. The battery module pole piece structure according to claim 1 or 2, characterized in that: When the upper surface of the pole piece body (1) is connected to the series copper bar (5), each fixing stud (2) is located above the series copper bar (5) and is configured to be screwed with a tightening nut (8).

5. The battery module pole piece structure according to claim 1 or 2, characterized in that: A positioning hole (9) is provided on the pole piece body (1).

6. The battery module pole piece structure according to claim 1 or 2, characterized in that: The stud (2) is fixed to the pole piece body (1) by means of a riveting process.

7. The battery module pole piece structure according to claim 3, characterized in that: The positive electrode sheet body and the negative electrode sheet body are structures made of aluminum.

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