Battery connection assembly, single battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery connecting assembly, a single battery and electric equipment, the battery connecting assembly comprises a first output electrode, a second output electrode, an outer insulating part and a heat-resistant insulating part; the first output electrode is provided with a first side wall, and a through hole is formed in the first side wall; the second output pole is inserted into the through hole in an insulated and sealed manner and is fixedly connected with the first output pole; the outer insulation part sleeves the periphery of the second output electrode, and at least part of the outer insulation part is clamped between one side, deviating from the interior of the battery, of the first side wall and the second output electrode; a groove is formed in any one of one side, deviating from the interior of the battery, of the first side wall and the outer insulating part; the groove is filled with a part of the heat-resistant insulating part, and the other part of the heat-resistant insulating part extends out of the groove and is clamped between the first side wall and the outer insulating part, so that secondary short circuit protection between the second output electrode and the first output electrode can be realized, the safety and the reliability are improved, the structure is simple, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery connection component, a single battery cell, and an electrical device. Background Technology

[0002] With the continuous development of batteries, safety has always been one of the most important performance characteristics. Currently, batteries consist of a battery casing, a cell pack assembly, and terminal assemblies. The battery casing houses the cell pack assembly and terminal assemblies, while the terminal assemblies connect to electronic components, sensors, or connectors to enable the external discharge function of the cylindrical battery. Furthermore, the external connection of the terminal assembly is often insulated from the battery casing using external insulating components to prevent short circuits and other safety hazards in the cylindrical battery.

[0003] As cylindrical batteries are developing towards higher energy density and higher charge / discharge power, the short-term current intensity of the terminal components is high, and the usage frequency is high. Therefore, the terminal components generate a lot of heat. Since the current external insulation components are not strong in high temperature resistance, they may melt under high temperature (above 300°C), resulting in poor insulation or even short circuits. This makes the cylindrical battery susceptible to insulation failure due to the high temperature caused by high voltage current during fast charging and long-term vehicle operation.

[0004] Therefore, there is an urgent need to provide a battery connection assembly, a single battery cell, and an electrical device to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a battery connection assembly that can protect against secondary short circuits between the second output terminal and the first output terminal, thereby improving safety and reliability, and is simple in structure and low in cost.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The battery connection assembly includes a first output terminal, a second output terminal, an external insulating component, and a heat-resistant insulating component;

[0008] The first output electrode has a first sidewall with a through hole; the second output electrode is insulated and sealed into the through hole and fixedly connected to the first output electrode; the outer insulating member is sleeved on the outer periphery of the second output electrode, and at least a portion of the outer insulating member is sandwiched between the side of the first sidewall away from the inside of the battery and the second output electrode.

[0009] The first sidewall facing away from the inside of the battery and any one of the outer insulating members have grooves; a portion of the heat-resistant insulating member is filled in the groove, and another portion extends out of the groove and is sandwiched between the first sidewall and the outer insulating member.

[0010] Optionally, the thickness of the heat-resistant insulating member is greater than the groove depth, so that at least a portion of the heat-resistant insulating member extends out of the groove.

[0011] Optionally, the thickness of the heat-resistant insulating component is T, and the groove depth is D, where TD > 0.1 mm.

[0012] Optionally, the high temperature resistance of the heat-resistant insulating component is greater than that of the external insulating component, and the heat insulation performance of the heat-resistant insulating component is greater than that of the external insulating component.

[0013] Optionally, the material of the aforementioned heat-resistant insulation component is any one of fiber strips, porous ceramic profiles, foam plastics, and porous glass.

[0014] Optionally, it further includes a sealing element, which is sleeved on the outer periphery of the second output electrode and abuts against the outer insulating element to achieve a seal between the second output electrode and the wall of the through hole; and / or,

[0015] It also includes an inner insulating member, which is sleeved on the outer periphery of the second output electrode, and at least a portion of the inner insulating member is sandwiched between the side of the first sidewall facing the inside of the battery and the second output electrode.

[0016] Optionally, the portion of the heat-resistant insulating member extending out of the groove protrudes radially from the groove to form a limiting portion that overlaps with the opening end face of the groove.

[0017] Optionally, the first output terminal includes a battery housing and a battery top cover, and the through hole is formed in the battery housing or the battery top cover.

[0018] Another objective of this invention is to provide a single-cell battery, which includes the battery connection assembly described in any of the above embodiments.

[0019] Another objective of this invention is to provide an electrical device comprising a single battery as described above.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a battery connection assembly, a single battery cell, and an electrical device. By creating a groove between the side of the first output electrode facing away from the battery interior and the outer insulating component, and installing a heat-resistant insulating component within the groove, the invention addresses the issue of thermal runaway in the single battery cell or a sudden increase in current intensity during charging / discharging, which could cause the second output electrode to heat up. This could lead to the outer insulating component, which is in contact with the second output electrode, potentially melting at a certain temperature. In this case, the heat-resistant insulating component, acting as a high-temperature resistant secondary insulation protection structure, can maintain an insulating distance between the outer insulating component of the second output electrode and the first output electrode, preventing secondary short circuits and improving the safety of the battery connection assembly. Furthermore, the groove not only positions the heat-resistant insulating component but also eliminates the need for it to completely fill the space between the side of the first output electrode facing away from the battery interior and the outer insulating component, reducing the structural volume and material usage. This simplifies the structure of the heat-resistant insulating component, lowers its cost, and improves its volume utilization. Attached Figure Description

[0022] Figure 1 This is an isometric view of a single battery provided in a specific embodiment of this utility model;

[0023] Figure 2 This is a cross-sectional view of a single battery provided in a specific embodiment of this utility model;

[0024] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0025] In the picture:

[0026] 10. First output terminal; 101. Through hole; 11. First sidewall;

[0027] 20. Second output pole; 201. Groove; 21. Middle connection part; 22. External connection part; 23. Internal connection part;

[0028] 30. External insulation components; 40. Heat-resistant insulation components;

[0029] 50. Sealing components; 60. Internal insulation components. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] The following reference Figures 1 to 3 This invention introduces the battery connection assembly, single battery cell, and electrical equipment provided by this utility model.

[0035] This embodiment provides a battery connection assembly for achieving secondary insulation between the first output electrode 10 and the second output electrode 20, so as to prevent the second output electrode 20 from undergoing a secondary short circuit under high temperature conditions.

[0036] Please refer to Figures 1 to 3Specifically, the battery connection assembly includes a first output electrode 10, a second output electrode 20, an outer insulating member 30, and a heat-resistant insulating member 40. The first output electrode 10 has a first sidewall 11 with a through hole 101. The second output electrode 20 is insulated and sealed into the through hole 101 and fixedly connected to the first output electrode 10. The outer insulating member 30 is sleeved on the outer periphery of the second output electrode 20, and at least a portion of the outer insulating member 30 is sandwiched between the side of the first sidewall 11 facing away from the battery interior and the second output electrode 20. A groove 201 is formed in either the side of the first sidewall 11 facing away from the battery interior or the outer insulating member 30. A portion of the heat-resistant insulating member 40 is filled in the groove 201, and another portion extends out of the groove 201 and is sandwiched between the first sidewall 11 and the outer insulating member 30.

[0037] In this embodiment, the battery connection assembly has a groove 201 formed between the side wall 11 of the first output electrode 10 facing away from the battery interior and the outer insulating member 30, and a heat-resistant insulating member 40 is installed in the groove 201. If a single cell experiences thermal runaway or a short-term increase in current intensity during charging and discharging, the heat generated by the second output electrode 20 will increase. This may cause the outer insulating member 30 in contact with the second output electrode 20 to melt when it reaches a certain temperature. At this time, the heat-resistant insulating member 40, as a high-temperature resistant structure for secondary insulation protection, can keep the outer insulating member 30 of the second output electrode 20 and the first output electrode 10 insulated and spaced apart, avoiding secondary short circuit problems caused by contact between the two, thus improving the safety of the battery connection assembly. Furthermore, since the heat-resistant insulating component 40 has insulated the second output electrode 20 from the side of the first sidewall 11 of the first output electrode 10 away from the battery interior, it also provides a certain degree of support for the second output electrode 20. This allows the second output electrode 20 to be spaced apart from the other sides of the first sidewall 11 of the first output electrode 10, thereby achieving insulation protection against secondary short circuits between the second output electrode 20 and the first output electrode 10, further improving the safety and reliability of the battery connection assembly. At the same time, the groove 201 not only positions the heat-resistant insulating component 40 for installation, but also eliminates the need for the heat-resistant insulating component 40 to completely fill the space between the side of the first sidewall 11 of the first output electrode 10 away from the battery interior and the outer insulating component 30. This reduces the volume of the structure and the amount of material used, simplifies the structure of the heat-resistant insulating component 40, reduces its cost, and improves its volume utilization rate.

[0038] It should be noted that in this embodiment, the first output terminal 10 includes a battery housing and a battery top cover. The through hole 101 is formed in either the battery housing or the battery top cover, both of which can be used to install and fix the second output terminal 20. It is understood that whether it is fixed in the battery housing or the battery top cover can be adapted according to actual needs, and no specific limitation is made here.

[0039] In this embodiment, the second output electrode 20 is a terminal post, which includes an inner connecting part 23, a middle connecting part 21 and an outer connecting part 22 arranged in sequence. The outer connecting part 22 and either the first sidewall 11 of the first output electrode 10 away from the inside of the battery have a groove 201 for mounting the heat-resistant insulating component 40.

[0040] Optionally, the heat-resistant insulating component 40 is a ring structure, and the corresponding groove 201 is also a ring groove, which can better achieve high-temperature secondary insulation between the external connection part 22 and the side of the first sidewall 11 away from the inside of the battery.

[0041] Since the first output electrode 10 is made of metal, and the outer insulating component 30 is made of plastic, specifically in this embodiment, the groove 201 is formed on the side of the first sidewall 11 of the first output electrode 10 away from the inside of the battery. This improves the installation and fixing effect of the groove 201 on the heat-resistant insulating component 40, and the groove 201 will not undergo significant deformation, resulting in a better installation effect.

[0042] Specifically, the thickness of the heat-resistant insulating component 40 is greater than the groove depth of the groove 201, so that the heat-resistant insulating component 40 at least partially extends out of the groove 201. This arrangement ensures that the heat-resistant insulating component 40 is at least partially located in the gap between the outer insulating component 30 and the side of the first sidewall 11 facing away from the battery interior. This ensures that after the outer insulating component 30 melts, at least a portion of the heat-resistant insulating component 40 remains between the outer connecting portion 22 and the side of the first sidewall 11 facing away from the battery interior, thus avoiding direct contact between the two and preventing secondary short circuits, thereby improving safety in use.

[0043] Optionally, the thickness of the heat-resistant insulating component 40 is T, and the groove depth of the groove 201 is D. TD > 0.1mm, which can satisfy the insulation distance between the second output electrode 20 and the side of the first sidewall 11 away from the inside of the battery, thus preventing them from contacting each other.

[0044] Alternatively, the portion of the heat-resistant insulating member 40 extending out of the groove 201 is provided to protrude radially from the groove 201 to form a limiting portion that overlaps with the opening end face of the mounting groove, thereby facilitating installation by operators and ensuring that at least a portion of the heat-resistant insulating member 40 is sandwiched between the outer insulating member 30 and the side of the first sidewall 11 facing away from the inside of the battery.

[0045] Specifically, the heat-resistant insulating component 40 has a higher high-temperature resistance than the outer insulating component 30, and its heat insulation performance is also higher than that of the outer insulating component 30. This means that even when the outer insulating component 30 melts at high temperatures, the heat-resistant insulating component 40 can maintain its structural integrity, ensuring that the outer connection part 22 and the first output electrode 10 are separated and insulated, further improving safety and reliability. It also ensures that the high-temperature fumes or liquids generated during thermal runaway of the single battery during high-power charging and discharging will not affect the heat-resistant insulating component 40.

[0046] Specifically, the heat-resistant insulating component 40 is made of any one of the following materials: organic PTC thermistor, ceramic, mica fiber strip, porous ceramic profile, foam plastic and porous glass, which can achieve its high temperature resistance, heat insulation and insulation performance.

[0047] More specifically, the heat-resistant insulation component 40 is made of fiber strips or porous ceramic profiles and is manufactured using a proprietary formula with full-gradient compounding technology, combined with existing in-situ aerogel generation technology, thereby achieving higher high-temperature resistance, insulation and sealing performance, and lower cost.

[0048] Furthermore, the battery connection assembly also includes a sealing member 50, which is sleeved on the outer periphery of the middle connecting portion 21 of the second output electrode 20 and connected to the outer insulating member 30 to achieve a seal between the second output electrode 20 and the through hole 101; and / or, the battery connection assembly also includes an inner insulating member 60, which is sleeved on the outer periphery of the second output electrode 20, and at least a portion of the inner insulating member 60 is sandwiched between the side of the first sidewall 11 facing the inside of the battery and the second output electrode 20, thereby achieving insulation between the inner connecting portion 23 of the second output electrode 20 and the first output electrode 10.

[0049] Specifically, the battery connection assembly in this embodiment includes a sealing member 50 and an inner insulating member 60. The inner insulating member 60 is sleeved on the outer periphery of the sealing member 50, and the sealing member 50 can be clamped by the inner insulating member 60 and the middle connecting part 21 of the second output electrode 20. By sequentially arranging the outer insulating member 30, the sealing member 50 and the inner insulating member 60, a primary insulating protective layer can be formed to achieve the insulation between the second output electrode 20 and the first output electrode 10.

[0050] Optionally, the outer insulating component 30, the sealing component 50, and the inner insulating component 60 are all annular structures to facilitate the mounting of the second output electrode 20. Furthermore, both the outer insulating component 30 and the inner insulating component 60 are made of plastic material to achieve insulation against the second output electrode 20. The sealing component 50 is made of any one of the following rubber materials: nitrile rubber, fluororubber, silicone rubber, etc., or any one of the following plastic materials: polytetrafluoroethylene, polyurethane, etc., to achieve its sealing and insulation effect. Of course, it can also be made of other sealing materials, which are not specifically limited here.

[0051] Furthermore, the fixed connection between the second output electrode 20 and the first output electrode 10 includes the second output electrode 20 being self-riveted to the first output electrode 10, the second output electrode 20 being riveted to the first output electrode 10 via a riveting block, the second output electrode 20 being glued to the first output electrode 10, or the second output electrode 20 being pressed to the first output electrode 10 via a riveting flange on the first output electrode 10. All of these methods can achieve the fixation between the second output electrode 20 and the first output electrode 10, and are not specifically limited here. For example, in this embodiment, the second output electrode 20 and the first output electrode 10 are fixedly connected by riveting, thereby making the second output electrode 20 include a middle connecting part 21, an outer connecting part 22, and an inner connecting part 23.

[0052] Please refer to Figure 1 and Figure 2 This embodiment also provides a single battery cell, which includes the battery connection assembly described in any of the above-described solutions. Specifically, the single battery cell can be a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single battery cell can also be a primary lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which will not be elaborated further here. Furthermore, the single battery cell can be a cylindrical battery, a prismatic battery, a blade battery, etc., without specific limitations. This single battery cell has the beneficial effects of the battery connection assembly described in any of the above-described solutions, which will not be elaborated further here.

[0053] When the above-mentioned battery connection assembly is used in the single cell, the sealing and insulation performance of the connection between the outer insulation component 30 and the side of the first sidewall 11 away from the inside of the battery can be improved. Even if the outer insulation component 30, the sealing component 50 or the inner insulation component 60 fails or deforms under high temperature environment, the heat-resistant insulation component 40 can still ensure the insulation and sealing performance of the connection, thereby improving the safety and reliability of the single cell.

[0054] This embodiment also provides an electrical device, which includes a single battery as described in the above scheme. Specifically, this electrical device can be an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as it uses electrical energy as its energy source; further details are omitted here.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery connection assembly, characterized in that, It includes a first output electrode (10), a second output electrode (20), an external insulating component (30), and a heat-resistant insulating component (40); The first output electrode (10) has a first sidewall (11) with a through hole (101); the second output electrode (20) is insulated and sealed into the through hole (101) and fixedly connected to the first output electrode (10); the outer insulating member (30) is sleeved on the outer periphery of the second output electrode (20), and at least a portion of the outer insulating member (30) is sandwiched between the side of the first sidewall (11) away from the inside of the battery and the second output electrode (20); The first sidewall (11) has a groove (201) on the side opposite to the inside of the battery and on either of the outer insulating member (30); a portion of the heat-resistant insulating member (40) is filled in the groove (201), and another portion extends out of the groove (201) and is sandwiched between the first sidewall (11) and the outer insulating member (30).

2. The battery connection assembly according to claim 1, characterized in that, The thickness of the heat-resistant insulating member (40) is greater than the groove depth of the groove (201) so that at least a portion of the heat-resistant insulating member (40) extends out of the groove (201).

3. The battery connection assembly according to claim 2, characterized in that, The thickness of the heat-resistant insulating component (40) is T, and the groove depth of the groove (201) is D, where TD > 0.1 mm.

4. The battery connection assembly according to claim 1, characterized in that, The heat-resistant insulating component (40) has a higher temperature resistance than the outer insulating component (30), and the heat insulation performance of the heat-resistant insulating component (40) is greater than that of the outer insulating component (30).

5. The battery connection assembly according to claim 4, characterized in that, The heat-resistant insulating component (40) is made of any one of fiber cotton strips, porous ceramic profiles, foam plastics and porous glass.

6. The battery connection assembly according to claim 1, characterized in that, It also includes a sealing element (50), which is sleeved on the outer periphery of the second output electrode (20) and abuts against the outer insulating element (30) to achieve a seal between the second output electrode (20) and the wall of the through hole (101); and / or, It also includes an inner insulating member (60), which is sleeved on the outer periphery of the second output electrode (20), and at least part of the inner insulating member (60) is sandwiched between the side of the first sidewall (11) facing the inside of the battery and the second output electrode (20).

7. The battery connection assembly according to any one of claims 1-6, characterized in that, The portion of the heat-resistant insulating member (40) extending out of the groove (201) is provided to protrude radially from the groove (201) to form a limiting portion that overlaps with the opening end face of the groove (201).

8. The battery connection assembly according to any one of claims 1-6, characterized in that, The first output terminal (10) includes a battery housing and a battery top cover, and the through hole (101) is formed in the battery housing or the battery top cover.

9. A single-cell battery, characterized in that, Includes the battery connection assembly as described in any one of claims 1-8.

10. Electrical equipment, characterized in that, Includes the single-cell battery as described in claim 9.

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