Battery module and energy storage power supply
By designing the first avoidance hole in the fixing frame of the battery module, it is ensured that the positive electrode structure is located in the avoidance hole and the negative electrode structure is located outside the avoidance hole, which solves the problem of the positive and negative electrode short circuit when welding the conductive sheet, improves production efficiency and safety, and reduces costs.
Patent Information
- Application Number
- CN202421714984.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing cylindrical cell modules are prone to short-circuit the positive and negative electrodes when welding conductive sheets, and it is necessary to paste the insulating protective sheets on the end covers, which reduces production efficiency and increases costs.
A battery module is designed, and its fixing frame includes a first avoidance hole. The positive electrode structure is located in the first avoidance hole and the negative electrode structure is located outside the first avoidance hole, thereby avoiding the short circuit of the positive and negative electrodes and reducing the manufacturing process.
Through this design, the insulating protective sheet is avoided on the end cover, which improves production efficiency, reduces costs, and enhances the safety of the battery module.
Smart Images
Figure CN222927677U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy storage power supplies, in particular to a battery module and an energy storage power supply. Background Art
[0002] With the rapid development of new energy technologies, cylindrical battery cells have advantages such as high energy density and stable discharge, and are widely used in various industries and fields, such as energy storage in energy storage power supplies. Generally, for easy management, multiple cylindrical battery cells need to be connected in series or parallel to form a battery module for use.
[0003] A cylindrical battery cell module usually uses a fixing frame to fix multiple cylindrical battery cells, and then welds a conductive sheet to the positive or negative electrode of the cylindrical battery cell for fixation. However, the outer shell of the cylindrical battery cell is the negative electrode and the end cap is the positive electrode. Therefore, after the outer shell and the end cap are connected, the distance between the positive electrode and the negative electrode is relatively close. To avoid short circuit between the positive and negative electrodes when welding the conductive sheet, an insulating protection sheet needs to be pasted on the end cap to cover the negative electrode, which reduces the production efficiency and increases the cost. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a battery module and an energy storage power supply, which reduce the manufacturing process, improve the production efficiency and reduce the cost.
[0005] To achieve the above object, the utility model adopts the following technical solutions:
[0006] A battery module, comprising:
[0007] A fixing frame, the fixing frame is provided with a receiving cavity, the inner wall of the receiving cavity is provided with a first shielding ring, and the first shielding ring has a first avoidance hole communicating the inside of the receiving cavity and the outside of the receiving cavity;
[0008] A cylindrical battery cell, disposed in the receiving cavity, the cylindrical battery cell includes a body, a first end of the body is provided with a positive electrode structure and a negative electrode structure, the first end abuts against the first shielding ring, along the axial direction of the cylindrical battery cell, the positive electrode structure is located within the first avoidance hole, and the negative electrode structure is located outside the first avoidance hole.
[0009] As an optional scheme of the above battery module, the body includes an end cap and an outer shell, the outer shell includes a buckling portion, the buckling portion buckles on the outer periphery of the end cap and is insulated from the end cap, the end cap forms the positive electrode structure, and the buckling portion forms the negative electrode structure.
[0010] As an optional scheme of the above battery module, the buckling portion forms a negative electrode ring on the end cap, and along the axial direction of the cylindrical battery cell, the edge of the first avoidance hole coincides with the inner wall of the negative electrode ring.
[0011] As an alternative to the above battery module, the fastening portion forms a negative electrode ring on the end cover, and along the axial direction of the cylindrical battery cell, the edge of the first avoidance hole is located within the negative electrode ring.
[0012] As an alternative to the above battery module, the end cover is convexly provided with a positive electrode post, the radius of the positive electrode post is r, the inner radius of the negative electrode ring is R, the radius of the first avoidance hole is less than or equal to (R - 0.5) mm, and the radius of the first avoidance hole is greater than or equal to r.
[0013] As an alternative to the above battery module, the cylindrical battery cell further includes a protective outer skin, the protective outer skin includes a protective ring, the protective ring is arranged at the first end of the body and covers the negative electrode structure, and the positive electrode structure penetrates through the protective ring.
[0014] As an alternative to the above battery module, the fixing frame includes an upper bracket and a lower bracket, the upper bracket is detachably connected to the lower bracket, and the cylindrical battery cell is arranged between the upper bracket and the lower bracket.
[0015] As an alternative to the above battery module, the upper bracket is provided with a first limiting groove, the lower bracket is provided with a second limiting groove, the first limiting groove and the second limiting groove form the accommodating cavity, one end of the cylindrical battery cell is arranged in the first limiting groove, and the other end of the cylindrical battery cell is arranged in the second limiting groove.
[0016] As an alternative to the above battery module, the fixing frame is provided with a plurality of the accommodating cavities, each of the accommodating cavities is provided with one of the cylindrical battery cells, and the plurality of cylindrical battery cells are connected in parallel or in series.
[0017] An energy storage power supply, the energy storage power supply includes the above battery module.
[0018] Advantages of the present utility model:
[0019] The present utility model provides a battery module and an energy storage power supply. In this battery module, the first avoidance hole of the fixing frame can avoid the positive electrode structure, which is convenient for welding the conductive sheet. At the same time, the fixing frame can shield the negative electrode structure around the first avoidance hole, thereby protecting the negative electrode structure and preventing the negative electrode structure from contacting the conductive busbar, thus avoiding the occurrence of positive-negative short circuit, and there is no need to paste an insulating protection sheet on the end cover.
[0020] This battery module reduces the manufacturing process, improves the production efficiency, and reduces the cost. Description of the drawings
[0021] Figure 1 is a schematic structural diagram of the battery module provided by the present utility model;
[0022] Figure 2 is an exploded view of the battery module provided by the present utility model;
[0023] Figure 3 is a cross-sectional view of the battery module provided by the present utility model;
[0024] Figure 4 is Figure 3 a partial enlarged view of position A in
[0025] In the figure:
[0026] 1. Fixing frame; 2. Cylindrical battery cell; 3. Positive conductive sheet; 4. Negative conductive sheet;
[0027] 11. Upper bracket; 12. Lower bracket; 21. Body; 22. Protective outer skin;
[0028] 111. First avoidance hole; 112. First shielding ring; 113. First limiting groove; 121. Second limiting groove; 122. Second avoidance hole; 211. End cover; 212. Outer shell;
[0029] 2111. Positive electrode post; 2121. Negative electrode ring. Detailed implementation manners
[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model.
[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.
[0032] Unless otherwise clearly defined and limited, the terms "installation", "connection", "linkage", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection or a detachable connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] Unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first feature and the second feature, or may include the situation where the first feature and the second feature are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0034] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.
[0035] This embodiment provides an energy storage power supply, which includes a housing and a plurality of battery modules. A plurality of fixing grooves are provided inside the housing, and the plurality of battery modules are correspondingly arranged in the plurality of fixing grooves one by one, so that the plurality of battery modules inside the housing do not affect each other, improving safety. The plurality of battery modules are connected in series or in parallel to store or release electric energy.
[0036] As Figure 1 and Figure 2 shown, the battery module includes a fixing frame 1 and battery cells. The fixing frame 1 is provided with a receiving cavity, and the battery cells are arranged in the receiving cavity. The battery cells include a body 21, and a positive electrode structure and a negative electrode structure are provided at the first end of the body 21. It can be understood that the electric quantity carried by the battery cells is relatively low. In order to increase the electric quantity of the battery module, the fixing frame 1 is provided with a plurality of receiving cavities, and one battery cell is arranged in each receiving cavity, and the plurality of battery cells are connected in parallel or in series.
[0037] It should be noted that the battery cells can be square shell battery cells or cylindrical battery cells. In this embodiment, the cylindrical battery cell 2 is taken as an example for illustration.
[0038] The battery cell module usually uses the fixing frame 1 to fix a plurality of cylindrical battery cells 2, which can ensure the stability between the plurality of cylindrical battery cells 2 and prevent extrusion between adjacent cylindrical battery cells 2. As Figure 3 and Figure 4As shown, since both the positive electrode structure and the negative electrode structure of the cylindrical battery cell 2 are located at the first end of the body 21, in order to avoid short circuit between the positive and negative electrodes when welding the conductive sheet, it is also necessary to paste an insulating protection sheet on the end cap 211 to cover the negative electrode, which reduces the production efficiency and increases the cost.
[0039] As Figure 2 and Figure 4 shown, to solve the above problems, in the battery module provided in this embodiment, the fixing frame 1 is provided with a first avoidance hole 111 corresponding to the accommodating cavity and communicating the inside and the outside of the accommodating cavity. Along the axial direction of the cylindrical battery cell 2, the positive electrode structure is located within the first avoidance hole 111, and the negative electrode structure is located outside the first avoidance hole 111.
[0040] In this battery module, the first avoidance hole 111 of the fixing frame 1 can avoid the positive electrode structure, facilitating the welding of the conductive sheet. At the same time, the fixing frame 1 can shield the negative electrode structure around the first avoidance hole 111, thereby protecting the negative electrode structure and preventing the negative electrode structure from contacting the conductive row, thus avoiding the occurrence of short circuit between the positive and negative electrodes, and there is no need to paste an insulating protection sheet on the end cap 211.
[0041] This battery module reduces the manufacturing process, improves the production efficiency, and reduces the cost.
[0042] As Figure 2 and Figure 4 shown, the body 21 includes an end cap 211 and a housing 212. The housing 212 has an opening, and the end cap 211 is disposed at the opening. The fastening portion of the housing 212 is fastened to the outer periphery of the end cap 211 and is insulated from the end cap 211. The end cap 211 forms the positive electrode structure, and the fastening portion forms the negative electrode structure. Among them, since the housing 212 is conductive, the entire housing 212 is the negative electrode of the cylindrical battery cell 2. Since the fastening portion needs to be fastened to the end cap 211, the fastening portion forms a negative electrode ring 2121 on the end cap 211, and the negative electrode ring 2121 is the above-mentioned negative electrode structure. When welding the conductive sheet to the positive electrode, it is necessary to place the conductive sheet in contact with the negative electrode ring 2121.
[0043] As Figure 4 shown, the end cap 211 of the cylindrical battery cell 2 protrudes with a positive electrode post 2111, and the positive electrode post 2111 is used to connect with an external circuit. In this embodiment, the positive electrode post 2111 is used to weld with the conductive sheet. The fixing frame 1 is also provided with a second avoidance hole 122, and the second avoidance hole 122 is located on the opposite side of the accommodating cavity with respect to the first avoidance hole 111. The conductive sheet is welded to the second end of the cylindrical battery cell 2 through the second avoidance hole 122, that is, the conductive sheet is welded to the housing 212. For easy distinction, the conductive sheet connected to the positive electrode post 2111 is the positive electrode conductive sheet 3, and the conductive sheet connected to the housing 212 is the negative electrode conductive sheet 4.
[0044] AsFigure 4 As shown, in order to effectively shield the negative electrode ring 2121, a first shielding ring 112 is provided on the inner wall of the accommodating cavity. The first shielding ring 112 has a first avoidance hole 111 for avoiding the conductive sheet. The first shielding ring 112 can also axially limit the cylindrical battery cell 2 to ensure the stability of the position of the cylindrical battery cell 2 and prevent the cylindrical battery cell 2 from moving and affecting the connectivity between the positive electrode structure and the conductive sheet.
[0045] Furthermore, a second shielding ring is provided on the inner wall of the accommodating cavity, the cylindrical battery core 2 is arranged between the first shielding ring 112 and the second shielding ring, and the second shielding ring is provided with a second avoidance hole 122 .
[0046] In some embodiments, along the axial direction of the cylindrical battery core 2, the edge of the first avoidance hole 111 coincides with the inner wall of the negative electrode ring 2121. This structure can ensure that the negative electrode ring 2121 is shielded by the first shielding ring 112, thereby preventing the positive electrode conductive sheet 3 from contacting the negative electrode ring 2121.
[0047] like Figure 4 As shown, in this embodiment, along the axial direction of the cylindrical battery core 2, the edge of the first avoidance hole 111 is located within the negative electrode ring 2121. In other words, the coverage of the first shielding ring 112 exceeds the negative electrode ring 2121, which can increase the distance between the positive electrode conductive sheet 3 and the negative electrode ring 2121, further improving safety.
[0048] Specifically, the radius of the positive pole 2111 is r, the inner radius of the negative pole ring 2121 is R, the radius of the first avoidance hole 111 is less than or equal to (R-0.5) mm, and the radius of the first avoidance hole 111 is greater than or equal to r. The inner radius of the negative pole ring 2121 refers to the radius of the through hole in the negative pole ring 2121, that is, the first shielding ring 112 exceeds the negative pole ring 2121 by 0.5 mm, and does not shield the positive pole 2111, and avoids the positive conductive sheet 3 from contacting the negative pole ring 2121 as much as possible.
[0049] In order to improve safety, the first avoidance hole 111 is equal to r, that is, the positive pole column 2111 can fill the first avoidance hole 111, so the positive conductive sheet 3 is completely located on the side of the first shielding ring 112 away from the negative pole ring 2121, eliminating the possibility of the positive conductive sheet 3 contacting the negative pole ring 2121.
[0050] like Figure 2 and Figure 4As shown, in this embodiment, the cylindrical battery cell 2 further includes a protective outer skin 22. The protective outer skin 22 includes a protective ring. The protective ring is disposed at the first end of the body 21 and covers the negative electrode structure, and the positive electrode structure passes through the protective ring. The protective outer skin 22 is a heat-shrinkable film, which is wrapped around the outside of the body 21 after being heated, and the part of the heat-shrinkable film located above the end cap 211 forms a protective ring, which can cover the negative electrode ring 2121 to avoid short circuit.
[0051] As Figures 1 to 3 shown, the fixing frame 1 includes an upper bracket 11 and a lower bracket 12. The upper bracket 11 and the lower bracket 12 are detachably connected, and the cylindrical battery cell 2 is disposed between the upper bracket 11 and the lower bracket 12. The detachable connection between the upper bracket 11 and the lower bracket 12 facilitates the assembly and disassembly of the battery module, and provides convenience for the repair and maintenance of the battery module.
[0052] Specifically, the upper bracket 11 is provided with a first limiting groove 113, and the lower bracket 12 is provided with a second limiting groove 121. The first limiting groove 113 and the second limiting groove 121 form a receiving cavity. One end of the cylindrical battery cell 2 is disposed in the first limiting groove 113, and the other end of the cylindrical battery cell 2 is disposed in the second limiting groove 121.
[0053] The first limiting groove 113 and the second limiting groove 121 can limit the cylindrical battery cell 2 from both ends of the cylindrical battery cell 2 to ensure the stability of the relative position of each cylindrical battery cell 2, and the first limiting groove 113 and the second limiting groove 121 can also limit the cylindrical battery cell 2 when assembling the upper bracket 11 and the lower bracket 12. Among them, a first avoidance hole 111 is opened on the upper bracket 11, and a second avoidance hole 122 is opened on the lower bracket 12.
[0054] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation of the present invention.
Claims
1. A battery module, characterized in that: include: A fixing frame, wherein the fixing frame is provided with an accommodating cavity, an inner wall of the accommodating cavity is provided with a first shielding ring, and the first shielding ring has a first avoidance hole connecting the inside of the accommodating cavity and the outside of the accommodating cavity; A cylindrical battery cell is arranged in the accommodating cavity, and the cylindrical battery cell includes a main body. A positive electrode structure and a negative electrode structure are arranged at the first end of the main body. Along the axial direction of the cylindrical battery cell, the positive electrode structure is located inside the first avoidance hole, and the negative electrode structure is located outside the first avoidance hole to be shielded by the shielding ring.
2. The battery module according to claim 1, characterized in that: The body includes an end cover and an outer shell, the outer shell includes a buckling portion, the buckling portion is buckled with the outer periphery of the end cover and is insulated from the end cover, the end cover forms the positive electrode structure, and the buckling portion forms the negative electrode structure.
3. The battery module according to claim 2, characterized in that: The buckling portion forms a negative electrode ring on the end cover, and along the axial direction of the cylindrical battery core, the edge of the first avoidance hole coincides with the inner wall of the negative electrode ring.
4. The battery module according to claim 2, characterized in that: The buckling portion forms a negative electrode ring on the end cover, and along the axial direction of the cylindrical battery core, the edge of the first avoidance hole is located inside the negative electrode ring.
5. The battery module according to claim 4, characterized in that: The end cover is convexly provided with a positive pole column, the radius of the positive pole column is r, the inner radius of the negative pole ring is R, the radius of the first avoidance hole is less than or equal to (R-0.5) mm, and the radius of the first avoidance hole is greater than or equal to r.
6. The battery module according to claim 1, characterized in that: The cylindrical battery core further includes a protective outer skin, which includes a protective ring, which is arranged at the first end of the body and covers the negative electrode structure, and the positive electrode structure passes through the protective ring.
7. The battery module according to any one of claims 1 to 6, characterized in that: The fixing frame comprises an upper bracket and a lower bracket, the upper bracket is detachably connected to the lower bracket, and the cylindrical battery cell is arranged between the upper bracket and the lower bracket.
8. The battery module according to claim 7, characterized in that: The upper bracket is provided with a first limiting groove, and the lower bracket is provided with a second limiting groove. The first limiting groove and the second limiting groove form the accommodating cavity. One end of the cylindrical battery cell is arranged in the first limiting groove, and the other end of the cylindrical battery cell is arranged in the second limiting groove.
9. The battery module according to any one of claims 1 to 6, characterized in that: The fixing frame is provided with a plurality of the accommodating cavities, each of the accommodating cavities is provided with a cylindrical battery core, and the plurality of the cylindrical battery cores are connected in parallel or in series.
10. An energy storage power supply, characterized in that: The energy storage power supply comprises the battery module according to any one of claims 1 to 9.