Structure for assembling square aluminum shell battery cell pole column
By designing the chide assembly structure for square aluminum -shell cells, the temperature sensing circuit is used to achieve the temperature induction of the temperature induction with thermal expansion material and spring structure, which solves the problem of safety risks and spatial utilization rate caused by the temperature concentration during the working of the battery cell. The independent thermal management and space saving of the core.
Patent Information
- Application Number
- CN202323424409.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-14
AI Technical Summary
In the prior art, when the square aluminum shell battery is working, the current is connected to the external circuit through the adapter and pole columns, resulting in obvious temperature concentration in the pole ear adapter and pole column areas, which poses local failure and safety risks. . Although the external cooling system can improve heat conduction efficiency, it will squeeze the battery pack space, increase costs, and cannot cut off the heat generation of the battery cell from the root.
Design a structure for square aluminum -shell cells, including the structure of the rotary chip and the chide structure. There is a container -filled tank filled with thermal expansion material in the connection structure, and the chilled structure is connected by the elastic connection of the lid through the spring structure to realize the automatic disconnection circuit of the temperature induction.
Through this structure, the square battery can facilitate the current break and the working state recovery based on the temperature sensing. The heat of the battery is cut off from the root cause to avoid local temperature concentration and safety risk. At the same time, it does not squeeze the battery pack space and save space.
Smart Images
Figure CN222422275U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium-ion batteries, in particular to a structure for assembling poles of square aluminum shell battery cells. Background Art
[0002] In order to increase the single-cell capacity and reduce costs, it is common to stack the positive and negative pole pieces and diaphragms in the square aluminum shell battery cells in a stacking manner, and the capacity can usually reach more than 100Ah. In order to meet the overcurrent conditions of the battery cell as a whole and improve the space utilization of the battery cell design, it is necessary to pre-weld the stacked positive and negative pole pieces and ears separately, and weld them with metal adapters, and then weld them again with the positive and negative poles connected to the external circuit to achieve current conduction.
[0003] In the prior art, for square aluminum shell batteries with poles on the top, metal adapters are usually used to connect the core package lead-out pole ears and external poles. The appearance is a simple bending structure, which mainly plays the role of structural support for the core package and collecting the current of the core package. When the large-capacity square aluminum shell battery is working, the current is connected to the external circuit through the adapter and the pole. According to the results of on-site tests and simulation analysis, there will be obvious temperature concentration in the pole ear adapter and pole area of the square battery, which will cause certain failure or safety risks in the local area of the battery. The overall temperature of large-capacity square batteries is relatively high when working, which poses a safety risk. At present, liquid cooling or air cooling of the external large surface or bottom surface is usually used to improve the heat conduction efficiency in order to adjust the temperature of the battery cell. However, the external cooling system will further squeeze the battery pack space and reduce space utilization; in addition, the monitoring of battery cell temperature and the control of external cooling medium also require complex system support, which will further increase the cost of the battery pack; in addition, external cooling only improves heat dissipation, and cannot cut off the operation of the battery cell from the root to prevent it from generating heat. Its function of reducing risks under certain abnormal operating conditions of the battery cell is limited.
[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content
[0005] The purpose of the utility model is to provide a structure for assembling the poles of square aluminum shell battery cells, so that the square battery can conveniently disconnect the current and restore the working state based on temperature sensing, cut off the operation of the battery cell from the root to prevent it from generating heat and avoid squeezing the battery pack space.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] The utility model discloses a structure for assembling a square aluminum shell battery pole, comprising:
[0008] The adapter plate structure includes a horizontal section and a vertical section extending vertically downward from one end of the horizontal section.
[0009] a receiving groove, which is recessed in the horizontal section, and the receiving groove is filled with a thermal expansion material layer;
[0010] A pole structure comprising:
[0011] The bottom end of the pole body is sleeved in the receiving groove and supported on the thermal expansion material layer.
[0012] A convex ring extending from the outer side of the pole body in a direction perpendicular to the central axis,
[0013] A plurality of spring positioning holes are evenly distributed on the upper surface of the convex ring,
[0014] A plurality of spring structures, wherein the spring structures are sleeved in the spring positioning holes;
[0015] The cover plate has a mounting hole, the pole body passes through the mounting hole and the spring structure is elastically connected to the cover plate.
[0016] In the structure for assembling poles of square aluminum shell battery cells, the pole body is a cylindrical structure with a first diameter.
[0017] In the structure for assembling square aluminum shell battery cell poles, the accommodating groove is a circular groove with a second diameter, and the second diameter is larger than the first diameter.
[0018] In the structure for assembling the poles of square aluminum shell battery cells, the pole body is a rectangular parallelepiped structure.
[0019] In the structure for assembling square aluminum shell battery core poles, the accommodating groove is a rectangular groove whose length and width are both greater than the rectangular parallelepiped structure.
[0020] In the structure for assembling a square aluminum shell battery cell pole, the pole body is a square column structure with a first side length.
[0021] In the structure for assembling square aluminum shell battery cell poles, the accommodating groove is a square groove with a second side length, and the second side length is greater than the first side length.
[0022] In the structure for assembling a square aluminum shell battery cell pole, the outer diameter of the spring structure is consistent with the aperture of the spring positioning hole.
[0023] In the structure for assembling square aluminum shell battery cell poles, the spring structure includes a cylindrical spring.
[0024] In the structure for assembling square aluminum shell battery cell poles, the cover plate is a horizontal plate.
[0025] In the above technical scheme, the utility model provides a structure for assembling square aluminum shell battery cell poles, which has the following beneficial effects: the structure for assembling square aluminum shell battery cell poles conveniently disconnects the current and restores the working state based on temperature sensing, cuts off the operation of the battery cell from the source so that it does not generate heat, and realizes abnormal temperature rise control of the battery cell adapter and pole area, and avoids squeezing the battery pack space, saving the overall internal and external space of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0027] Figure 1 It is a schematic diagram of the structure for assembling the pole of a square aluminum shell battery cell according to the present invention.
[0028] Figure 2 The utility model is an exploded schematic diagram of the structure for assembling square aluminum shell battery poles.
[0029] Figure 3 The utility model is a schematic diagram of the structure of the pole structure used for assembling the square aluminum shell battery pole.
[0030] Figure 4 The utility model is a schematic structural diagram of the adapter structure used for assembling square aluminum shell battery poles. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] like Figure 1-4 As shown, in one embodiment, a structure for assembling a square aluminum shell battery cell pole of the utility model includes:
[0040] The adapter plate structure 301 includes a horizontal section and a vertical section extending vertically downward from one end of the horizontal section.
[0041] An accommodating groove 302, which is recessed in the horizontal section, and the accommodating groove 302 is filled with a thermal expansion material layer;
[0042] The pole structure 201 includes:
[0043] The bottom end of the pole body is sleeved in the receiving groove 302 and supported on the thermal expansion material layer.
[0044] A convex ring extending from the outer side of the pole body in a direction perpendicular to the central axis,
[0045] A plurality of spring positioning holes 203 are evenly distributed on the upper surface of the convex ring.
[0046] A plurality of spring structures 202, wherein the spring structures 202 are sleeved in the spring positioning holes 203;
[0047] The cover plate 101 has a mounting hole, the pole body passes through the mounting hole, and the spring structure 202 is elastically connected to the cover plate 101 .
[0048] In a preferred embodiment of the structure for assembling poles of square aluminum shell battery cells, the pole body is a cylindrical structure with a first diameter.
[0049] In a preferred embodiment of the structure for assembling square aluminum shell battery cell poles, the accommodating groove 302 is a circular groove with a second diameter, and the second diameter is greater than the first diameter.
[0050] In a preferred embodiment of the structure for assembling the poles of square aluminum shell battery cells, the pole body is a rectangular parallelepiped structure.
[0051] In a preferred embodiment of the structure for assembling the poles of square aluminum shell battery cells, the accommodating groove 302 is a rectangular groove whose length and width are greater than the rectangular parallelepiped structure.
[0052] In a preferred embodiment of the structure for assembling poles of square aluminum shell battery cells, the pole body is a square column structure having a first side length.
[0053] In a preferred embodiment of the structure for assembling square aluminum shell battery cell poles, the accommodating groove 302 is a square groove having a second side length, and the second side length is greater than the first side length.
[0054] In a preferred embodiment of the structure for assembling a square aluminum shell battery cell pole, the outer diameter of the spring structure 202 is consistent with the aperture of the spring positioning hole 203 .
[0055] In a preferred embodiment of the structure for assembling square aluminum shell battery cell poles, the spring structure 202 includes a cylindrical spring.
[0056] In a preferred embodiment of the structure for assembling square aluminum shell battery cell poles, the cover plate 101 is a horizontal plate.
[0057] In one embodiment, Figure 1 As shown, the structure for assembling the pole of a square aluminum shell battery cell includes a plastic cover plate 101, a pole structure 201 and a transfer plate structure 301. The pole structure 201 includes a spring structure 202 and a spring positioning hole 203; and a receiving groove 302 for filling a thermal expansion material is provided on the transfer plate structure 301. The thermal expansion material is a mixture of one or more of magnesium oxide, forsterite (Mg2SiO4), aluminum oxide, stabilized zirconium oxide (ZrO2), beryllium oxide (BeO), spinel (MgA l 2O4), high thermal expansion ceramics or various high thermal expansion polymer materials represented by epoxy resin, which are non-conductive or have very low conductivity and can achieve multiple expansion and contraction with temperature changes.
[0058] Under the initial conditions of the structure for assembling the pole of the square aluminum shell battery cell, the spring structure 202 is first assembled in the spring positioning hole 203 to form a whole with the pole structure 201. The outer diameter of the spring structure 202 is consistent with the spring positioning hole 203 to ensure positioning, and its stiffness selection needs to match the selected thermal expansion material layer, which is usually in the range of 0.4 to 1N / mm; then the thermal expansion material layer is filled in the receiving groove 302 of the thermal expansion material filling area on the adapter structure 301; the receiving groove 302 matches the size of the lower part of the pole structure 201, and a space is reserved for them to be connected; the cover plate 101 is fixed to the outer shell by snaps, and then the upper part of the assembled pole structure 201 passes through the opening of the cover plate 101 and extends to the outside of the battery cell.
[0059] When the battery cell works normally at room temperature, due to the size and structure design, the spring structure 202 is in a semi-compressed state, exerting downward pressure on the pole structure 201, making it contact with the adapter structure 301, and realizing the conduction of the entire circuit; when the abnormal temperature rise of the battery cell reaches a certain limit, the thermal expansion material will deform significantly, which will overcome the spring pressure upward and compress it further, so that the pole structure 201 and the adapter structure 301 will be separated, cutting off the circuit. Ultimately, the function of actively controlling the heat generation of the battery cell or warning the battery cell status is realized. If the technician determines that the battery cell has no major abnormality and can continue to be used, the thermal expansion material will shrink to the initial state after cooling down. At this time, the circuit is turned on and the battery cell resumes normal operation.
[0060] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.
[0061] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A structure for assembling square aluminum shell battery poles, characterized in that: These include, The adapter plate structure includes a horizontal section and a vertical section extending vertically downward from one end of the horizontal section. a receiving groove, which is recessed in the horizontal section, and the receiving groove is filled with a thermal expansion material layer; A pole structure comprising: The bottom end of the pole body is sleeved in the receiving groove and supported on the thermal expansion material layer. A convex ring extending from the outer side of the pole body in a direction perpendicular to the central axis, A plurality of spring positioning holes are evenly distributed on the upper surface of the convex ring, A plurality of spring structures, wherein the spring structures are sleeved in the spring positioning holes; The cover plate has a mounting hole, the pole body passes through the mounting hole and the spring structure is elastically connected to the cover plate.
2. The structure for assembling square aluminum shell battery poles according to claim 1, characterized in that: The pole body is a cylindrical structure with a first diameter.
3. The structure for assembling square aluminum shell battery poles according to claim 2, characterized in that: The receiving groove is a circular groove having a second diameter, and the second diameter is greater than the first diameter.
4. The structure for assembling square aluminum shell battery poles according to claim 1, characterized in that: The pole body is a rectangular parallelepiped structure.
5. The structure for assembling square aluminum shell battery poles according to claim 4, characterized in that: The receiving groove is a rectangular groove whose length and width are both larger than the rectangular parallelepiped structure.
6. The structure for assembling square aluminum shell battery poles according to claim 1, characterized in that: The pole body is a square column structure with a first side length.
7. The structure for assembling square aluminum shell battery poles according to claim 6, characterized in that: The receiving groove is a square groove having a second side length, and the second side length is greater than the first side length.
8. The structure for assembling square aluminum shell battery poles according to claim 1, characterized in that: The outer diameter of the spring structure is consistent with the hole diameter of the spring positioning hole.
9. The structure for assembling square aluminum shell battery poles according to claim 1, characterized in that: The spring structure comprises a cylindrical spring.
10. The structure for assembling square aluminum shell battery poles according to claim 1, characterized in that: The cover plate is a horizontal plate.