Insulation protection device and battery pack

Abstract

The utility model discloses an insulation protection device and a battery pack, the insulation protection device is a plastic part which is integrally formed and has insulativity, and the insulation protection device comprises a first part, a second part, a third part and a fourth part which are connected in sequence, the first part and the third part are oppositely arranged in a spaced mode in the first direction X, the second part and the fourth part are oppositely arranged in a spaced mode in the second direction Y, the fourth part and the first part are detachably connected, and when the fourth part and the first part are mutually connected, the fourth part and the second part are mutually connected. The first part, the second part, the third part and the fourth part jointly define a protection space for surrounding the conductive part; according to the scheme, the protection device is extremely easy to operate, has the advantage of being convenient to assemble and disassemble, and has the advantages of being simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical insulation protection, and in particular to an insulation protection device and a battery pack. Background Art

[0002] At present, the high-voltage connections inside the battery pack (generally copper busbar connections or wiring harness connections) need to be insulated. On the one hand, it is used to increase the protection level, solve the problem that the electrical connection parts are easily damaged or easily cause short circuits, and reduce the risk of electric shock to operators when maintaining the battery. On the other hand, it increases the electrical clearance and creepage distance to ensure that the battery pack has high safety. The current insulation protection device is usually designed to include a detachable insulation upper cover and an insulation lower cover. The problem of how to fix the insulation lower cover needs to be considered, which leads to the internal structure of the battery pack being more complicated in order to achieve electrical protection. In addition, the insulation upper cover is easy to fall into the battery pack during disassembly and is difficult to be removed. In addition, the removed insulation upper cover is also easy to be lost. Therefore, it is necessary to improve the existing technology.

[0003] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0004] The utility model provides an insulation protection device and a battery pack, which mainly solve the technical problem of how to efficiently protect conductive parts in a simpler way.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An insulating protection device is used for insulating and protecting a conductive part in a battery pack, the insulating protection device is an integrally formed plastic part with insulating properties, the insulating protection device comprises a first part, a second part, a third part and a fourth part connected in sequence, the first part and the third part are arranged relatively spaced along a first direction X, the second part and the fourth part are arranged relatively spaced along a second direction Y, the fourth part and the first part are detachably connected to each other, and when the fourth part and the first part are connected to each other, the first part, the second part, the third part and the fourth part jointly enclose a protective space for enclosing the conductive part.

[0007] In one of the technical solutions, the length of the fourth part is greater than that of the second part, a first buckle is provided at the end of the first part, and a second buckle inclined toward the first part is provided on the area where the fourth part protrudes from the second part, the second buckle is used in conjunction with the first buckle and the second buckle is located on the outside of the fourth part.

[0008] In one of the technical solutions, a limiting block is provided on the fourth part along the second direction Y, and the limiting block is arranged at an interval with the second buckle and is located on the inner side of the fourth part, so that a limiting space is formed between the limiting block and the second buckle;

[0009] When the first part is connected to the fourth part, the first buckle extends into the limiting space, and the first buckle abuts against the limiting block and is engaged with the second buckle under the reaction force of the limiting block.

[0010] In one of the technical solutions, an operating portion is extended along the first direction X on a side of the second buckle facing away from the limiting block, and the first buckle and the second buckle are separated by pulling the operating portion outward.

[0011] In one of the technical solutions, when the first part and the fourth part are connected to each other and jointly surround the conductive part, the insulating protection device is in a deformed state and clamps the conductive part.

[0012] In one of the technical solutions, at least two supporting parts are protruding from the inner wall of the fourth part, and two adjacent supporting parts are arranged at intervals so that an avoidance gap is formed between the two adjacent supporting parts.

[0013] In one of the technical solutions, the inner wall of the fourth part is further provided with at least one avoidance hole, and the avoidance hole is arranged adjacent to the support portion.

[0014] In one of the technical solutions, at least one protrusion is protruding from the inner wall of the second part, the position of the protrusion corresponds to the position of the avoidance hole, and a limiting groove is provided in the middle of the protrusion, and the limiting groove is used to accommodate the head of the bolt.

[0015] In one of the technical solutions, the connection positions of the first part and the second part, the connection positions of the second part and the third part, and the connection positions of the third part and the fourth part are all connected with bending parts, and the inner walls of the bending parts between the second part and the third part and the bending parts between the third part and the fourth part are provided with grooves for reducing the thickness of the bending parts.

[0016] The present application also provides a battery pack, comprising a conductive part and an insulating protection device as described above that is detachably connected to the conductive part.

[0017] Compared with the prior art, the insulation protection device provided by the utility model has at least the following beneficial effects:

[0018] During installation, the first part and the fourth part need to be connected to each other and formed a protective space, so that the protection device can be surrounded by the entire periphery of the conductive part, thereby achieving the purpose of insulating protection of the conductive part; when it is necessary to disassemble the conductive part, it is only necessary to forcefully separate the first part and the fourth part from each other, and the conductive part can be disassembled. It can be seen from this that the operation of the protection device of this solution is extremely simple and has the advantage of ease of assembly and disassembly. Moreover, the protection device of this solution is an integrated injection molded plastic part, so the protection device of this solution has the advantages of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of an insulation protection device provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the insulation protection device shown in another angle;

[0022] Figure 3 for Figure 1 The schematic diagram of the structure of the insulating protection device shown when surrounding the conductive part;

[0023] Figure 4 for Figure 3 a top view of the structure shown;

[0024] Figure 5 for Figure 4 A partial enlarged view of the AA in the middle;

[0025] Figure 6 for Figure 1 A front view of the insulating protection device shown;

[0026] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0027] Among them, the reference numerals in the figure are:

[0028] 1. Insulation protection device; 11. First part; 111. First buckle; 112. Bump; 113. Limiting groove; 12. Fourth part; 121. Second buckle; 122. Limiting block; 123. Limiting space; 124. Operating part; 125. Support part; 126. Avoidance gap; 127. Avoidance hole; 13. Second part; 14. Third part; 15. Protection space; 16. Bending part; 17. Notch;

[0029] 2. Conductive part; 21. Bolt; 211. Head;

[0030] 3. Connector; 4. Conductive copper busbar. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply 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 understood as a limitation on the present application.

[0034] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Please also read Figures 1 to 5The embodiment of the utility model provides an insulation protection device, which is used to insulate the conductive part 2 to avoid damage to the conductive part 2 or the problem of short circuit, and also reduces the risk of electric shock to operators when maintaining the battery. In addition, in high-voltage application scenarios, the insulation protection device can also increase the distance of electrical clearance and creepage, thereby improving the safety of the product. The insulation protection device is an integrally injection-molded plastic part with insulation. The insulation protection device includes a first part 11, a second part 13, a third part 14 and a fourth part 12 connected in sequence, wherein the first part 11 and the third part 14 are arranged relatively spaced along the first direction X, and the second part 13 and the fourth part 12 are arranged relatively spaced along the second direction Y. The first part 11 and the fourth part 12 are detachably connected, and when the first part 11 and the fourth part 12 are connected to each other, the first part 11 and the fourth part 12 jointly enclose a protective space 15 for surrounding the conductive part 2, and the first part 11 and the fourth part 12 are preferably detachably connected by snap-fit ​​connection. In other embodiments, the first part 11 and the fourth part 12 may also be detachably connected by Velcro.

[0037] Specifically, during installation, the first part 11 and the fourth part 12 only need to be connected to each other to form a protective space 15, so that the protective device as a whole can be formed as follows: Figures 3 to 5 As shown, the first part 11 and the fourth part 12 are surrounded by the outer periphery of the conductive part 2, thereby achieving the purpose of insulating and protecting the conductive part 2; when the conductive part 2 needs to be disassembled, the first part 11 and the fourth part 12 only need to be separated from each other by force, and the conductive part 2 can be disassembled. It can be seen that the operation of the protection device of this solution is extremely simple, and it has the advantage of being easy to assemble and disassemble. Moreover, the protection device of this solution is an integrally injection-molded plastic part, so the protection device of this solution has the advantages of simple structure and low cost.

[0038] In this embodiment, the conductive part 2 of this embodiment is the connection between the connector 3 and the conductive copper bus 4, wherein the connector 3 is preferably a charging interface or a discharging interface of the battery pack, and the conductive copper bus 4 is preferably used to connect a battery management system (used to collect electrical information and temperature information of the battery module and control the working state of the battery module according to the collected information).

[0039] Please refer to the Figure 1 and Figure 2, the length of the fourth part 12 is greater than that of the second part 13, a first buckle 111 is provided on the first part 11, and a second buckle 121 inclined toward the first part 11 is provided on the area where the fourth part 12 protrudes from the second part 13, the second buckle 121 and the first buckle 111 are used in conjunction with each other and the second buckle 121 is located on the outside of the fourth part 12, so as to realize the buckle connection between the first part 11 and the fourth part 12 in turn. Figure 6 and Figure 7 As shown, the second buckle 121 is inclined toward the first buckle 111, and the inclination angle α relative to the fourth part 12 is 85°-87°. By designing the inclination angle of the second buckle 121 in this way, it is beneficial to achieve a more reliable mutual connection between the first buckle 111 and the second buckle 121. Please refer to Figure 6 and Figure 7 The bottom of the first buckle 111 is in a wedge shape. When the first buckle 111 is engaged with the second buckle 121, the second buckle 121 is subjected to the force of the first buckle 111, which causes the inclination angle α to increase slightly, so that the first buckle 111 can be smoothly engaged with the second buckle 121.

[0040] Please refer to the Figure 1 and Figure 2 , a limiting block 122 is arranged on the fourth part 12 along the Y direction, and the limiting block 122 and the second buckle 121 are arranged at intervals and located on the inner side of the fourth part 12, so that a limiting space 123 is formed between the limiting block 122 and the second buckle 121. When the first part 11 and the fourth part 12 are connected to each other, the first buckle 111 will extend into the limiting space 123, and the first buckle 111 will abut against the outer wall of the limiting block 122, and the first buckle 111 will be pressed by the limiting block 122 and the second buckle 121 will be engaged with each other to achieve a more reliable connection between the first part 11 and the fourth part 12, wherein the bottom surface of the limiting space 123 is used to limit the downward movement of the first buckle 111, ensuring the reliability of the first buckle 111 and the second buckle 121 to maintain mutual engagement. At the same time, the limiting block 122 also plays a role in guiding the first buckle 111, so that the first buckle 111 can accurately be engaged with the second buckle 121. In addition, an operating portion 124 extends outwardly along the first direction X on one side of the second buckle 121 facing away from the limit block 122, and the first buckle 111 and the second buckle 121 are separated by pulling the operating portion 124 outward. Specifically, the user can pinch the operating portion 124 and apply a force to the first part 11 in a direction away from the fourth part 12, so as to easily separate the first part 11 from the fourth part 12. It can be seen that by providing the operating portion 124, it is more convenient for the operator to realize the mutual disassembly of the first part 11 and the fourth part 12.

[0041] In this embodiment, when the first part 11 and the fourth part 12 are connected to each other and jointly surround the conductive part 2, the insulating protection device as a whole is in a deformed state and clamps the conductive part 2. At this time, the insulating protection device will not be offset relative to the conductive part 2, thereby improving the reliability of electrical protection for the conductive part 2.

[0042] Please refer to the Figures 1 to 5 The inner wall of the fourth part 12 is provided with at least two supporting parts 125, and the two supporting parts 125 are used to support the conductive part 2 together, so that when the first part 11 and the fourth part 12 are connected to each other and surround the conductive part 2 together, the insulating protection device as a whole can clamp the conductive part 2. The two adjacent supporting parts 125 are arranged at intervals, so that an avoidance gap 126 is formed between the two adjacent supporting parts 125. The avoidance gap 126 is used to avoid the protruding structure on the conductive part 2. In addition, the inner wall of the fourth part 12 is also provided with at least one avoidance hole 127, and the avoidance hole 127 is arranged adjacent to the supporting part 125. The avoidance hole 127 is also used to avoid the protruding structure. Preferably, the avoidance hole 127 is used to avoid the bolt 21 connected to the conductive part 2.

[0043] Please refer to the Figures 1 to 5 At least one protrusion 112 is convexly provided on the inner wall of the second part 13, and a limiting groove 113 is provided in the middle of the protrusion 112. The position of the protrusion 112 corresponds to the position of the avoidance hole 127. When the avoidance hole 127 is used to avoid the tail end of the bolt 21, the limiting groove 113 is used to accommodate the head 211 of the bolt 21. On the one hand, the setting of the limiting groove 113 can limit the freedom of the insulating protection device relative to the conductive part 2, so that the insulating protection device will not rotate relative to the conductive part 2, thereby ensuring the position and posture of the insulating protection device after installation. On the other hand, the head 211 of the bolt 21 is limited by the limiting groove 113, so that the bolt 21 is not easy to loosen and fall off, thereby improving the reliability of the conductive part 2 to maintain conductivity.

[0044] Please refer to the Figure 1 and Figure 2 The connection positions of the first part 11 and the second part 13, the connection positions of the second part 13 and the third part 14, and the connection positions of the third part 14 and the fourth part 12 are all connected with a bending portion 16, and the inner wall of at least one bending portion 16 is provided with a notch 17, which can reduce the thickness of the bending portion 16, making the bending portion 16 easier to deform, and reduce the internal stress of the insulating protection device after bending, thereby improving the reliability of the first buckle 111 and the second buckle 121 to keep each other engaged. Preferably, the inner wall of the bending portion 16 between the second part 13 and the third part 14, and the inner wall of the bending portion 16 between the third part 14 and the fourth part 12 are all provided with a notch 17.

[0045] The present embodiment also provides a battery pack, which includes a box, a battery module, a battery management system, a charging interface and a discharging interface, wherein the battery module and the battery management system are both placed in the box, the charging interface and the discharging interface are both installed on the outer wall of the box, the battery module and the battery management system are electrically connected, the battery management system is used to collect electrical information and temperature information of the battery module and control the working state of the battery module according to the collected information, the charging interface and the discharging interface are both electrically connected to the battery management system, the charging interface is used for plugging in an external power supply, and the discharging interface is used for plugging in electrical equipment (such as new energy vehicles), the conductive part 2 at the connection between the battery module and the battery management system, the conductive part 2 at the connection between the battery management system and the charging interface, and the conductive part 2 at the connection between the battery management system and the discharging interface can all be applied with the above-mentioned detachably connected insulating protection device 1, thereby improving the safety of the battery pack, and having the advantage of easy installation and disassembly when realizing electrical protection, which can improve the installation or disassembly efficiency of the operator.

[0046] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An insulation protection device for insulating a conductive part (2) in a battery pack, characterized in that: The insulating protection device (1) is an integrally formed insulating plastic part, comprising a first part (11), a second part (13), a third part (14) and a fourth part (12) connected in sequence, the first part (11) and the third part (14) being arranged with a relative spacing along a first direction (X), the second part (13) and the fourth part (12) being arranged with a relative spacing along a second direction (Y), the fourth part (12) and the first part (11) being detachably connected to each other, and when the fourth part (12) and the first part (11) are connected to each other, the first part (11), the second part (13), the third part (14) and the fourth part (12) together form a protective space (15) for surrounding the conductive part (2).

2. The insulation protection device according to claim 1, characterized in that: The length of the fourth part (12) is greater than that of the second part (13); a first buckle (111) is provided at the end of the first part (11); a second buckle (121) inclined toward the first part (11) is provided in an area where the fourth part (12) protrudes from the second part (13); the second buckle (121) and the first buckle (111) are used in conjunction with each other and the second buckle (121) is located on the outside of the fourth part (12).

3. The insulation protection device according to claim 2, characterized in that: A limiting block (122) is arranged on the fourth part (12) along the second direction (Y), and the limiting block (122) is arranged at an interval from the second buckle (121) and is located on the inner side of the fourth part (12), so that a limiting space (123) is formed between the limiting block (122) and the second buckle (121); When the first part (11) is connected to the fourth part (12), the first buckle (111) extends into the limiting space (123), and the first buckle (111) abuts against the limiting block (122) and is engaged with the second buckle (121) by the reaction force of the limiting block (122).

4. The insulation protection device according to claim 3, characterized in that: An operating portion (124) is extended along the first direction (X) on a surface of the second buckle (121) facing away from the limiting block (122), and the first buckle (111) and the second buckle (121) are separated by pulling the operating portion (124) outwards.

5. The insulation protection device according to claim 1, characterized in that: When the first part (11) and the fourth part (12) are connected to each other and jointly surround the conductive part (2), the insulating protection device is in a deformed state and clamps the conductive part (2).

6. The insulation protection device according to claim 1, characterized in that: At least two support portions (125) are protrudingly provided on the inner wall of the fourth portion (12), and two adjacent support portions (125) are arranged at intervals so that an avoidance gap (126) is formed between the two adjacent support portions (125).

7. The insulation protection device according to claim 6, characterized in that: The inner wall of the fourth part (12) is also provided with at least one avoidance hole (127), and the avoidance hole (127) is arranged adjacent to the support portion (125).

8. The insulation protection device according to claim 7, characterized in that: At least one protrusion (112) is convexly provided on the inner wall of the second part (13), the position of the protrusion (112) corresponds to the position of the avoidance hole (127), and a limiting groove (113) is provided in the middle of the protrusion (112), and the limiting groove (113) is used to accommodate the head of the bolt (21).

9. The insulation protection device according to any one of claims 1 to 8, characterized in that: The connection position between the first part (11) and the second part (13), the connection position between the second part (13) and the third part (14), and the connection position between the third part (14) and the fourth part (12) are all connected with a bending portion (16); The inner walls of the bending portion between the second part (13) and the third part (14) and the bending portion (16) between the third part (14) and the fourth part (12) are provided with notches (17) for reducing the thickness of the bending portion (16).

10. A battery pack, characterized in that: An insulation protection device (1) as claimed in any one of claims 1 to 9, comprising a conductive part (2) and a detachable connection to the conductive part (2).

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