Temperature sensing fixing structure and battery pack

Abstract

The utility model provides a temperature sensing fixing structure and a battery pack. The temperature sensing fixing structure provided by the utility model comprises a temperature sensing bracket arranged on a busbar bracket, wherein a temperature sensor is fixed on the temperature sensing bracket; the busbar support is provided with a bar piece, and the bar piece is located above the temperature sensing support. The temperature sensing bracket extends upwards to form a first extension part, and the first extension part is positioned on one side, close to the battery cell, of the busbar bracket; a buckle and a first positioning column are formed on the first extending part, the buckle and the first positioning column are arranged at intervals in the transverse direction, and a claw part extending in the transverse direction is formed on the end portion of the buckle. According to the temperature sensing fixing structure provided by the utility model, through the arrangement of the buckle and the first positioning column, the temperature sensing support can be hooked with the sheet through the buckle, and the first positioning column is inserted into the first positioning hole in the sheet, so that the installation of the temperature sensor is facilitated, the installation process of the temperature sensor is simplified, and the installation efficiency is improved. Therefore, the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, and particularly relates to a temperature sensor fixing structure. The utility model also relates to a battery pack provided with the above temperature sensor fixing structure. Background Art

[0002] In the rapidly developing industries of electric vehicles and energy storage systems, as the core energy storage unit, the performance monitoring and safety management of battery modules are crucial. The battery module sampling assembly, as a key component of the battery management system (BMS), is responsible for collecting key parameters such as voltage, current, and temperature of the battery module in real time to ensure the stable operation and efficient management of the battery system.

[0003] A temperature sensor is arranged on the bus bar bracket of the battery module sampling assembly, and the temperature sensor is usually arranged on a temperature sensor bracket and installed in the battery module sampling assembly through the connection between the temperature sensor bracket and the bus bar bracket. Currently, the temperature sensor bracket is usually connected to the bus bar bracket by a thermal riveting process. However, this connection method requires the temperature sensor bracket to be held on the bus bar bracket during the thermal riveting operation to complete the installation of the temperature sensor, which has the problems of cumbersome operation and low installation efficiency. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a temperature sensor fixing structure, which can simplify the installation process of the temperature sensor and improve the installation efficiency.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A temperature sensor fixing structure includes a temperature sensor bracket arranged on a bus bar bracket, and a temperature sensor is fixed on the temperature sensor bracket; a bus bar piece is arranged on the bus bar bracket, and the bus bar piece is located above the temperature sensor bracket; the temperature sensor bracket extends upward to form a first extension part, and the first extension part is located on the side of the bus bar bracket close to the battery cell; a buckle and a first positioning post are formed on the first extension part, the buckle and the first positioning post are arranged at intervals in the transverse direction, and a claw part extending transversely is formed at the end of the buckle; the end of the buckle can pass through the bus bar bracket, so that the claw part is hooked on the side of the bus bar piece away from the bus bar bracket; the first positioning post can sequentially pass through the bus bar bracket and the bus bar piece and be inserted into a first positioning hole on the bus bar piece.

[0007] Further, the temperature-sensitive bracket extends downward to form a second extension portion, and the second extension portion is located on the side of the busbar bracket close to the battery cell; a second positioning post is formed on the side of the second extension portion facing the busbar bracket, and a second positioning hole is formed on the busbar bracket; the second positioning post can be inserted into the second positioning hole.

[0008] Further, the end of the first positioning post can protrude from the side of the tab away from the busbar bracket; the end of the second positioning post can protrude from the busbar bracket and pass through the flexible circuit board on the busbar bracket.

[0009] Further, the width a of the claw portion along the length direction of the tab satisfies: 2.5 mm ≤ a ≤ 5 mm.

[0010] Further, the distance b between the buckle and the first positioning post satisfies: 8 mm ≤ b ≤ 10.5 mm.

[0011] Further, a groove is formed on the side of the tab close to the buckle, and the buckle can be snapped into the groove.

[0012] Further, a hollow portion for avoiding the temperature-sensitive bracket is provided on the busbar bracket.

[0013] Further, the temperature sensor is arranged on the side of the temperature-sensitive bracket facing the battery cell, and the temperature sensor can be connected to the flexible circuit board on the busbar bracket through the hollow portion.

[0014] Further, a receiving groove for receiving the temperature sensor is provided on the temperature-sensitive bracket, and at least a part of the temperature sensor is located in the receiving groove.

[0015] Compared with the prior art, the present utility model has the following advantages:

[0016] In the temperature-sensitive fixing structure of the present utility model, through the arrangement of the buckle and the first positioning post, the temperature-sensitive bracket of the present embodiment can be hooked to the tab through the buckle, and the first positioning post is inserted into the first positioning hole in the tab, so as to be fixed on the busbar bracket. Compared with the prior art, it is convenient for the installation of the temperature sensor, simplifies the installation process of the temperature sensor, and thus improves the installation efficiency.

[0017] Through the cooperative arrangement of the second positioning post and the second positioning hole on the busbar, the connection points between the temperature-sensitive bracket and the busbar bracket can be increased, constituting a lateral constraint on the temperature-sensitive bracket to prevent the temperature-sensitive bracket from shaking, thereby improving the fixing effect of the temperature-sensitive bracket.

[0018] The end of the first positioning post can protrude from the bus bar piece, and the end of the second positioning post can protrude from the bus bar bracket. When the temperature sensor bracket moves in the thickness direction of the bus bar bracket due to vibration, through the protruding arrangement of the ends of the first positioning post and the second positioning post, it can be avoided that the first positioning post disengages from the first positioning hole and the second positioning post disengages from the second positioning hole, thereby preventing the temperature sensor bracket from falling off due to vibration and further improving the fixing effect of the temperature sensor bracket.

[0019] The width a of the claw part along the length direction of the bus bar piece satisfies: 2.5 mm ≤ a ≤ 5 mm. By increasing the width of the claw part, the contact area between the claw part and the bus bar piece is increased. At the same time, the increase in the width of the claw part can improve the overall structural strength of the buckle and the connection effect between the buckle and the bus bar piece, thereby ensuring the fixing effect of the temperature sensor bracket.

[0020] The distance b between the buckle and the first positioning post satisfies: 8 mm ≤ b ≤ 10.5 mm. Through the setting of the distance b, it can be ensured that the first extension part has sufficient width, and the connection effect between the buckle, the first positioning post and the bus bar piece is improved in the transverse direction.

[0021] Through the setting of the groove on the bus bar piece, the buckle can be received in the groove, so that the groove constitutes a constraint on the buckle in the height direction to prevent the buckle from moving along the bus bar piece in the height direction and causing the temperature sensor bracket to shake.

[0022] Through the setting of the hollowed-out part on the bus bar bracket, a part of the temperature sensor bracket can pass through the bus bar bracket, thereby reducing the space occupied by the temperature sensor bracket and the temperature sensor in the thickness direction, and thus reducing the thickness of the bus bar.

[0023] The temperature sensor is arranged on the side of the temperature sensor bracket facing the battery cell, which can shorten the distance between the temperature sensor and the battery cell, thereby improving the accuracy of temperature acquisition. At the same time, the setting of the hollowed-out part can facilitate the connection between the temperature sensor and the flexible circuit board.

[0024] Through the setting of the receiving groove on the temperature sensor bracket, it can be ensured that the temperature sensor is stably connected to the temperature sensor bracket, preventing the temperature sensor from disengaging from the temperature sensor bracket and improving the fixing effect on the temperature sensor. At the same time, the receiving groove receives the temperature sensor, which can avoid the temperature sensor protruding too much, thereby reducing the thickness of the bus bar.

[0025] Another object of the present invention is to provide a battery pack, and the battery pack is provided with the temperature sensor fixing structure as described above.

[0026] The battery pack and / or the temperature sensor fixing structure of the present invention has the same technical effects as the prior art and will not be elaborated here. Description of the Drawings

[0027] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0028] Figure 1 is a schematic diagram of the overall structure of the temperature-sensitive bracket according to the first embodiment of the present utility model;

[0029] Figure 2 is a schematic diagram of the structure of the temperature-sensitive bracket according to the first embodiment of the present utility model from another perspective;

[0030] Figure 3 is a schematic diagram of the overall structure of the temperature-sensitive fixing structure according to the first embodiment of the present utility model;

[0031] Figure 4 is an exploded view of the temperature-sensitive bracket according to the first embodiment of the present utility model connected to the busbar bracket;

[0032] Figure 5 is a front view of the temperature-sensitive fixing structure according to the first embodiment of the present utility model;

[0033] Figure 6 is a rear view of the temperature-sensitive fixing structure according to the first embodiment of the present utility model;

[0034] Figure 7 is a schematic diagram of the temperature-sensitive fixing structure according to the first embodiment of the present utility model provided on the battery module;

[0035] Explanation of reference numerals:

[0036] 1. Temperature-sensitive bracket;

[0037] 101. First extension part; 102. Second extension part;

[0038] 103. Buckle; 1031. Claw part;

[0039] 104. First positioning post; 105. Second positioning post; 106. Accommodating groove;

[0040] 2. Busbar bracket; 201. Second positioning hole; 202. Connection window; 203. Hollow part;

[0041] 3. Barium piece; 301. First positioning hole; 302. Groove;

[0042] 4. Temperature sensor; 5. Flexible circuit board. Detailed implementation manners

[0043] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0044] In the following description, specific details such as specific system architectures, technologies, etc. are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0045] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationships such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationships shown in the drawings, and are 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 a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0046] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0047] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0048] Embodiment 1

[0049] This embodiment relates to a temperature sensor fixing structure for fixing a temperature sensor 4 on a bus bar bracket 2 of a battery module. In terms of the overall structure, as Figure 3 shown, the temperature sensor fixing structure of this embodiment includes a temperature sensor bracket 1 provided on the bus bar bracket 2.

[0050] Among them, as Figure 1 , Figure 3As shown in the figure, a temperature sensor 4 is fixed on the temperature-sensitive bracket 1. A barium piece 3 is provided on the busbar bracket 2, and the barium piece 3 is located above the temperature-sensitive bracket 1. The temperature-sensitive bracket 1 extends upward to form a first extension portion 101, and the first extension portion 101 is located on the side of the busbar bracket 2 close to the battery cell. A buckle 103 and a first positioning post 104 are formed on the first extension portion 101. The buckle 103 and the first positioning post 104 are arranged at intervals in the transverse direction, and a laterally extending claw portion 1031 is formed at the end of the buckle 103.

[0051] When installing the temperature-sensitive bracket 1, the end of the buckle 103 can pass through the busbar bracket 2, so that the claw portion 1031 is hooked on the side of the barium piece 3 away from the busbar bracket 2. The first positioning post 104 can sequentially pass through the busbar bracket 2 and the barium piece 3, and be inserted into the first positioning hole 301 on the barium piece 3.

[0052] As described above, through the settings of the buckle 103 and the first positioning post 104, the temperature-sensitive bracket 1 of this embodiment can be fixed on the busbar bracket 2 by hooking the buckle 103 with the barium piece 3 and inserting the first positioning post 104 into the first positioning hole 301 in the barium piece 3. Compared with the prior art, it is convenient to install the temperature sensor 4, simplifies the installation process of the temperature sensor 4, and thus improves the installation efficiency.

[0053] Specifically based on the above overall introduction, as Figure 7 shown, the battery module sampling assembly composed of the busbar bracket 2, the barium piece 3, and the temperature-sensitive bracket 1 of this embodiment is arranged on the side of the battery module where there is a pole post. As Figure 4 shown, a connection window 202 is provided at the overlapping position of the busbar bracket 2 and the barium piece 3 of this embodiment, and the barium piece 3 can be connected to the pole post of the battery cell through the connection window 202. The buckle 103 and the positioning post of the temperature-sensitive bracket 1 pass through the busbar bracket 2 through the connection window 202.

[0054] Since the temperature-sensitive bracket 1 is only connected to the barium piece 3 through its upper first extension portion 101 and is at a height on the busbar bracket 2, in order to further improve the fixing effect of the temperature-sensitive bracket 1, as Figure 1 、 Figure 2 and Figure 3As shown in the figure, the temperature-sensitive bracket 1 of this embodiment extends downward to form a second extension portion 102, and the second extension portion 102 is located on the side of the busbar bracket 2 close to the battery cell. A second positioning post 105 is formed on the side of the second extension portion 102 facing the busbar bracket 2, and a second positioning hole 201 is formed on the busbar bracket 2. The second positioning post 105 can be inserted into the second positioning hole 201. Through the cooperation of the second positioning post 105 and the second positioning hole 201 on the busbar, the connection points between the temperature-sensitive bracket 1 and the busbar bracket 2 can be increased, constituting a lateral constraint on the temperature-sensitive bracket 1 to prevent the temperature-sensitive bracket 1 from shaking, thereby improving the fixing effect of the temperature-sensitive bracket 1, and further ensuring the fixing stability of the temperature sensor 4.

[0055] In order to further improve the fixing effect of the temperature-sensitive bracket 1, the end of the first positioning post 104 of this embodiment can protrude from the side of the tab 3 away from the busbar bracket 2. The end of the second positioning post 105 can protrude from the busbar bracket 2 and pass through the flexible circuit board 5 on the busbar bracket 2. When the temperature-sensitive bracket 1 moves in the thickness direction of the busbar bracket 2 due to vibration, through the protruding settings of the ends of the first positioning post 104 and the second positioning post 105, it can be avoided that the first positioning post 104 disengages from the first positioning hole 301 and the second positioning post 105 disengages from the second positioning hole 201, thereby preventing the temperature-sensitive bracket 1 from falling off due to vibration and further improving the fixing effect of the temperature-sensitive bracket 1. In specific implementation, the height of the first positioning post 104 protruding from the tab 3 and the height of the second positioning post 105 protruding from the busbar can not exceed 1.5 mm.

[0056] In order to improve the connection effect between the buckle 103 and the tab 3, the width a of the claw portion 1031 of this embodiment along the length direction of the tab 3 satisfies: 2.5 mm ≤ a ≤ 5 mm. By increasing the width of the claw portion 1031, the contact area between the claw portion 1031 and the tab 3 can be increased. At the same time, the increase in the width of the claw portion 1031 can improve the overall structural strength of the buckle 103. And when the width a is small, the structural strength of the buckle 103 is poor, and the contact area between the claw portion 1031 and the tab 3 is small, and the buckle 103 is prone to breakage and the temperature-sensitive bracket 1 is disengaged from the tab 3. When the width a is too large, the stiffness of the buckle 103 and the claw portion 1031 is large, which is not convenient for the installation of the buckle 103. Therefore, the setting of the width a of the claw portion 1031 can improve the connection effect between the buckle 103 and the tab 3, thereby ensuring the fixing effect of the temperature-sensitive bracket 1. In specific implementation, the width a can be set to 2.5 mm, 3.5 mm, 4.5 mm or 5 mm.

[0057] In addition, to further improve the fixing effect of the temperature-sensitive bracket 1, the distance b between the buckle 103 and the first positioning post 104 in this embodiment satisfies: 8 mm ≤ b ≤ 10.5 mm. By setting the distance b, it can ensure that the first extension portion 101 has a sufficient width, thereby improving the connection effect between the buckle 103 and the first positioning post 104 and the tab 3 in the transverse direction. When the distance b is too small, it is not easy to snap the buckle 103 onto the tab 3, and when the distance b is too large, the first extension portion 101 is likely to deflect due to vibration, resulting in the first positioning post 104 disengaging from the first positioning hole 301. In specific implementation, the distance b in this embodiment can be set to 8 mm, 9 mm, or 10.5 mm.

[0058] In this embodiment, as Figure 2 shown, a groove 302 is formed on one side of the tab 3 close to the buckle 103, and the buckle 103 can be snapped into the groove 302. By providing the groove 302, the buckle 103 can be received in the groove 302, so that the groove 302 constitutes a constraint on the buckle 103 in the height direction to prevent the buckle 103 from moving along the tab 3 in the height direction, resulting in the temperature-sensitive bracket 1 shaking, thereby improving the fixing effect between the temperature-sensitive bracket 1 and the tab 3.

[0059] In addition, in this embodiment, to reduce the thickness of the busbar composed of the busbar bracket 2, the tab 3, the temperature-sensitive bracket 1, etc., as Figure 4 shown, a hollowed-out portion 203 for avoiding the temperature-sensitive bracket 1 is provided on the busbar bracket 2 in this embodiment. By providing the hollowed-out portion 203, a part of the temperature-sensitive bracket 1 can pass through the busbar bracket 2, thereby reducing the space occupied by the temperature-sensitive bracket 1 and the temperature sensor 4 in the thickness direction, thereby reducing the thickness of the busbar and improving the compactness of the battery module.

[0060] Moreover, to improve the accuracy of temperature acquisition by the temperature sensor 4, as Figure 6 shown, the temperature sensor 4 in this embodiment is arranged on the side of the temperature-sensitive bracket 1 facing the battery cell, and the temperature sensor 4 can be connected to the flexible circuit board 5 on the busbar bracket 2 through the hollowed-out portion 203. Arranging the temperature sensor 4 on the side of the temperature-sensitive bracket 1 facing the battery cell can shorten the distance between the temperature sensor 4 and the battery cell, thereby improving the accuracy of temperature acquisition. At the same time, since the flexible circuit board 5 is arranged on the side of the busbar bracket 2 away from the battery cell, the provision of the hollowed-out portion 203 can facilitate the connection between the temperature sensor 4 and the flexible circuit board 5.

[0061] Specifically, the temperature-sensitive bracket 1 of this embodiment is provided with a receiving groove 106 for receiving the temperature sensor 4, and at least a part of the temperature sensor 4 is located in the receiving groove 106. Through the setting of the receiving groove 106, it can ensure that the temperature sensor 4 is stably connected to the temperature-sensitive bracket 1, prevent the temperature sensor 4 from detaching from the temperature-sensitive bracket 1, and improve the fixing effect on the temperature sensor 4. At the same time, the receiving groove 106 is recessed and formed in the thickness direction of the bus bar, so that when the receiving groove 106 houses the temperature sensor 4, it can avoid the temperature sensor 4 protruding too much, thereby reducing the thickness of the bus bar.

[0062] In summary, for the temperature-sensitive fixing structure of this embodiment, through the setting of the buckle 103 and the first positioning post 104, the temperature-sensitive bracket 1 of this embodiment can be hooked to the bus bar piece 3 through the buckle 103, and the first positioning post 104 is inserted into the first positioning hole 301 in the bus bar piece 3, and then fixed on the bus bar bracket 2. Compared with the prior art, it is convenient for the installation of the temperature sensor 4, simplifies the installation process of the temperature sensor 4, thereby improving the installation efficiency and having good practicability.

[0063] Embodiment 2

[0064] This embodiment relates to a battery pack. In terms of the overall structure, the battery pack is provided with the temperature-sensitive fixing structure as described in Embodiment 1.

[0065] Specifically, the battery pack of this embodiment is provided with a battery module, and at one end of the battery module with a pole, there is a battery module sampling assembly composed of the above-mentioned temperature-sensitive bracket 1, bus bar bracket 2, bus bar piece 3 and flexible circuit board 5. At least one temperature-sensitive bracket 1 is provided on the battery module sampling assembly.

[0066] For the battery pack of this embodiment, through the setting of the above temperature-sensitive fixing structure, it is convenient for the installation of the temperature sensor 4, simplifies the installation process of the temperature sensor 4, improves the installation efficiency, and thus facilitates the assembly work of the battery pack.

[0067] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A temperature sensing fixed structure, characterized in that: It comprises a temperature sensing bracket arranged on the busbar bracket, and a temperature sensor is fixed on the temperature sensing bracket; The busbar bracket is provided with a bar, and the bar is located above the temperature sensing bracket; The temperature sensing bracket extends upward to form a first extension portion, and the first extension portion is located on a side of the busbar bracket close to the battery cell; A buckle and a first positioning column are formed on the first extension portion, the buckle and the first positioning column are arranged at intervals in the transverse direction, and a claw portion extending transversely is formed on the end of the buckle; The end of the buckle can pass through the bus bracket, so that the claw is hooked on the side of the bar away from the bus bracket; The first positioning column can pass through the busbar support and the bar piece in sequence, and be inserted into the first positioning hole on the bar piece.

2. The temperature sensing fixing structure according to claim 1, characterized in that: The temperature sensing bracket extends downward to form a second extension portion, and the second extension portion is located on a side of the busbar bracket close to the battery core; A second positioning column is formed on one side of the second extension portion facing the busbar bracket, and a second positioning hole is formed on the busbar bracket; The second positioning column can be inserted into the second positioning hole.

3. The temperature sensing fixing structure according to claim 2, characterized in that: The end of the first positioning column can protrude from a side of the bar away from the busbar bracket; The end of the second positioning column can protrude from the busbar bracket and pass through the flexible circuit board on the busbar bracket.

4. The temperature sensing fixing structure according to claim 1, characterized in that: The width a of the claw portion along the length direction of the bar satisfies: 2.5 mm ≤ a ≤ 5 mm.

5. The temperature sensing fixing structure according to claim 1, characterized in that: The distance b between the buckle and the first positioning column satisfies: 8mm≤b≤10.5mm.

6. The temperature sensing fixing structure according to claim 1, characterized in that: A groove is formed on one side of the tab close to the buckle, and the buckle can be snapped into the groove.

7. The temperature sensing fixing structure according to any one of claims 1 to 6, characterized in that: The busbar bracket is provided with a hollow portion for avoiding the temperature sensing bracket.

8. The temperature sensing fixing structure according to claim 7, characterized in that: The temperature sensor is arranged on a side of the temperature sensing bracket facing the battery core, and the temperature sensor can be connected to the flexible circuit board on the bus bracket through the hollow portion.

9. The temperature sensing fixing structure according to claim 8, characterized in that: The temperature sensing bracket is provided with a receiving groove for receiving the temperature sensor, and at least a part of the temperature sensor is located in the receiving groove.

10. A battery pack, characterized in that: The battery pack is provided with the temperature-sensing fixing structure according to any one of claims 1 to 9.

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