Temperature acquisition assembly, acquisition circuit board and battery pack

Abstract

The utility model relates to a temperature acquisition assembly, which comprises a first acquisition nickel sheet and a temperature sensor, the first acquisition nickel sheet comprises a first connection section, a second connection section and a buffer folding section, the first connection section and the second connection section are located in different horizontal planes, and the first connection section and the second connection section are connected through the buffer folding section; a slotting part is arranged in the second connecting section, and the temperature sensor is located in the slotting part; the first connecting section is connected with an external aluminum bar, and the second connecting section and the temperature sensor are connected with an external FPC board. The first acquisition nickel sheet has certain elasticity due to the adoption of the folding structure, so that the FPC board is pressed down to be attached to the surface of the battery cell, heat generated by the battery cell can be directly transmitted to the temperature sensor through the FPC board, and the acquisition precision and the response speed of a thermal management system are improved. On the basis, the utility model also relates to an acquisition circuit board comprising the temperature acquisition assembly and a battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a temperature acquisition component, an acquisition circuit board and a battery pack. Background Art

[0002] With the rapid development of the new energy market, the demand for energy storage batteries is increasing. In the fierce market competition, battery pack design is developing towards lightness, precision, high energy and safety. Currently, collecting low-voltage signals (voltage signals and temperature signals) of battery packs through precision circuit boards has become the mainstream collection method.

[0003] In the existing precision circuit board acquisition technology, there are two main low-voltage signal acquisition methods:

[0004] (1) Method 1 is a collection method that integrates voltage signals and temperature signals. For example, Chinese utility model patent CN215893822U discloses a temperature collection structure for automotive batteries, which uses a collection method that integrates voltage signals and temperature signals. This method sets voltage collection and temperature collection at the same location, saving space; however, the FPC board of this method generally does not directly contact the surface of the battery cell. The heat generated by the battery cell needs to be transferred to the temperature sensor through the aluminum busbar and the nickel sheet in turn. Therefore, the deviation between the temperature collected by the temperature sensor and the actual temperature is large, which reduces the response speed of the thermal management system.

[0005] (2) The second method is to independently collect voltage and temperature signals. For example, Chinese utility model patent CN211480228U discloses a battery pack and its information collection component, which independently arranges nickel sheets to collect voltage and independently arranges temperature sensors directly attached to the surface of the battery cell to collect temperature. This method has high collection accuracy and fast response speed, but the temperature sensor collection is independently set up, which takes up more space and adds an additional fixed structure.

[0006] Therefore, in order to solve the above-mentioned technical problems, the utility model proposes a signal acquisition component for a battery pack and a battery pack. Utility Model Content

[0007] The purpose of the utility model is to solve the technical problems that when the voltage signal and the temperature signal are integrated into one in the prior art, the collected temperature will be biased and the response speed will be reduced, and when the voltage signal and the temperature signal are collected independently, more space will be occupied and additional structures will be required. A temperature collection component, a collection circuit board and a battery pack are proposed.

[0008] In order to achieve the above-mentioned purpose, on the one hand, the utility model provides a temperature collection component, which includes a first collection nickel sheet and a temperature sensor, the first collection nickel sheet includes a first connecting section, a second connecting section and a buffer folding section, the first connecting section and the second connecting section are located in different horizontal planes, and the first connecting section and the second connecting section are connected by the buffer folding section; a slotted portion is provided in the second connecting section, and the temperature sensor is located in the slotted portion; the first connecting section is connected to an external aluminum bar, and the second connecting section and the temperature sensor are both connected to an external FPC board.

[0009] Further, a gap is provided between the first connecting section and the buffer folding section, and / or between the second connecting section and the buffer folding section along the vertical direction.

[0010] Furthermore, arc-shaped portions are respectively provided at both ends of the buffer folding section, and the arc-shaped portions at both ends are respectively connected to the first connecting section and the second connecting section.

[0011] Furthermore, the length direction of the first nickel collecting sheet is parallel to the arrangement direction of the external battery cells, and a protrusion is provided on one side of the first connecting section, and the protrusion is connected to the external aluminum bar.

[0012] On the other hand, the utility model also provides a collection circuit board, including an FPC board, a plurality of aluminum bars, and at least one temperature collection component according to any one of claims 1 to 4, wherein the plurality of aluminum bars are respectively arranged on the outside of both sides of the FPC board; the FPC board includes a main body, at least one side of the main body is connected to at least one first connecting cantilever, and the second connecting section and the temperature sensor in each of the temperature collection components are connected to one of the first connecting cantilevers, and the first connecting section is connected to one of the aluminum bars.

[0013] Furthermore, the first collecting nickel sheet applies downward pressure to the first connecting cantilever, so that the first connecting cantilever is deflected downward relative to the main body.

[0014] Furthermore, the first connecting cantilever includes a fitting portion and a bridging portion, the fitting portion is connected to the main body portion through the bridging portion, the second connecting section and the temperature sensor are both connected to the fitting portion, and under the downward pressure applied by the first nickel collection sheet, the fitting portion contacts the surface of the external battery cell.

[0015] Furthermore, it also includes a plurality of second collection nickel sheets, and a plurality of second connecting cantilevers are respectively connected to both sides of the main body, and one end of each second collection nickel sheet is connected to one of the second connecting cantilevers, and the other end is connected to one of the aluminum bars.

[0016] On the other hand, the utility model also provides a battery pack, which includes the temperature acquisition component described in any of the above embodiments.

[0017] On the other hand, the utility model further provides a battery pack, which includes the acquisition circuit board described in any of the above embodiments.

[0018] Beneficial effects of the utility model:

[0019] (3) The first nickel sheet has a certain elasticity due to its foldable structure, so that the first nickel sheet can exert downward pressure on the FPC board connected to it, without the need to design an additional auxiliary bracket or apply structural adhesive. The position where the FPC board is connected to the second connecting section and the temperature sensor can move downward under the pressure of the first nickel sheet and fit on the upper surface of the battery cell. In this way, the heat generated by the battery cell can be directly transferred to the temperature sensor through the FPC board, avoiding the process in the prior art where the heat of the battery cell needs to be transferred in sequence through the aluminum bus, the nickel sheet and then to the temperature sensor, thereby greatly reducing the deviation between the temperature collected by the temperature sensor and the actual temperature, and improving the collection accuracy and response speed of the thermal management system.

[0020] (4) A slot is provided in the first nickel sheet, and the temperature sensor is provided in the slot. The second connection section in the first nickel sheet and the temperature sensor are both connected to the external FPC board, so that the temperature sensor and the first nickel sheet are provided in the same area, saving layout space;

[0021] (5) Since the first collection nickel sheet has a certain elasticity, it can absorb the uneven size difference of the battery cell in the vertical direction due to the assembly tolerance; at the same time, the first collection nickel sheet has a certain buffering effect, which can absorb the expansion force caused by the heating of the battery cell and protect the collection circuit board from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the temperature collection component of the utility model.

[0023] Figure 2 It is a schematic structural diagram of the first nickel sheet of the utility model.

[0024] Figure 3 It is a structural schematic diagram of the acquisition circuit board of the utility model.

[0025] Figure 4 It is a structural schematic diagram of the FPC board of the utility model.

[0026] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point A.

[0027] Description of reference numerals:

[0028] 1-first collection nickel sheet; 11-first connecting section; 12-second connecting section; 121-slotted portion; 13-buffered folding section; 14-gap; 2-temperature sensor; 3-FPC board; 31-main body; 32-first connecting cantilever; 321-fitting portion; 322-bridging portion; 33-second connecting cantilever; 4-aluminum row; 5-second collection nickel sheet. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0030] Example 1

[0031] like Figure 1 to Figure 2 As shown, the utility model provides a temperature acquisition component, which includes a first acquisition nickel sheet 1 and a temperature sensor 2. The first acquisition nickel sheet 1 includes a first connecting section 11, a second connecting section 12 and a buffer folding section 13. The first connecting section 11 and the second connecting section 12 are located in different horizontal planes, and the first connecting section 11 and the second connecting section 12 are connected by the buffer folding section 13; the second connecting section 12 is provided with a slotted portion 121, and the temperature sensor 2 is located in the slotted portion 121; the first connecting section 11 is connected to an external aluminum bar 4, and the second connecting section 12 and the temperature sensor 2 are both connected to an external FPC board 3. Specifically, the temperature sensor 2 adopts an NTC sensor.

[0032] In this embodiment, a slot 121 is provided in the first nickel sheet 1, the temperature sensor 2 is provided in the slot 121, and the second connecting section 12 in the first nickel sheet 1 and the temperature sensor 2 are both connected to the external FPC board 3, so that the temperature sensor 2 and the first nickel sheet 1 are provided in the same area, saving layout space; further, the first nickel sheet 1 adopts a folding structure, so that the first nickel sheet 1 has a certain elasticity, so that the first nickel sheet 1 can apply downward pressure to the FPC board connected thereto, without the need to additionally design an auxiliary bracket or apply structural adhesive, so that the position where the FPC board is connected with the second connecting section 12 and the temperature sensor 2 can move downward under the pressure of the first nickel sheet 1 and fit on the upper surface of the external battery cell, so that the heat generated by the battery cell can be directly transferred to the temperature sensor 2 through the FPC board, avoiding the transfer process in the prior art that the heat of the battery cell needs to be sequentially transferred through the aluminum bar, the nickel sheet and then to the temperature sensor, thereby greatly reducing the deviation between the temperature collected by the temperature sensor 2 and the actual temperature, and improving the collection accuracy and the response speed of the thermal management system.

[0033] In addition, since the first collection nickel sheet 1 has a certain elasticity, it can absorb the uneven size difference of the battery cell in the vertical direction due to assembly tolerance; at the same time, the first collection nickel sheet 1 has a certain buffering effect, which can absorb the expansion force caused by the heating of the battery cell and protect the collection circuit board from being affected.

[0034] Further, a gap 14 is provided in the vertical direction between the first connecting section 11 and the buffer folding section 13, and / or between the second connecting section 12 and the buffer folding section 13. Preferably, a gap 14 is provided in the vertical direction between the first connecting section 11 and the buffer folding section 13, and between the second connecting section 12 and the buffer folding section 13, and when the first collection nickel sheet 1 is subjected to force, the gap 14 can be compressed, so that the first collection nickel sheet 1 has a certain elasticity and a certain buffering effect.

[0035] Furthermore, arc portions 131 are respectively provided at both ends of the buffer folding section 13, and the arc portions 131 at both ends are respectively connected to the first connecting section 11 and the second connecting section 12. In this embodiment, since the first connecting section 11, the buffer folding section 13, and the second connecting section 12 are connected in a folding manner, the arc portions 131 are provided to reduce stress concentration at the connection and avoid fracture at the connection; at the same time, the arc portions 131 are used to connect, so that gaps are provided in the vertical direction between the first connecting section 11 and the buffer folding section 13, and between the second connecting section 12 and the buffer folding section 13, so as to ensure that the first nickel sheet 1 has a certain elasticity and a certain buffering effect.

[0036] Furthermore, the length direction of the first collection nickel sheet 1 is parallel to the arrangement direction of the external battery cells, and a protrusion 111 is provided on one side of the first connection section 11, and the protrusion 111 is connected to the external aluminum bar 4. In this embodiment, the protrusion 111 is provided to connect to the aluminum bar 4, so that the length direction of the first collection nickel sheet 1 is arranged parallel to the arrangement direction of the external battery cells. When the external battery cells are subjected to expansion force due to heating, the first collection nickel sheet 1 can better absorb the expansion force, thereby ensuring that the collection circuit board is not affected by the expansion force.

[0037] Example 2

[0038] like Figures 3 to 5As shown, the utility model also provides a collection circuit board, including an FPC board 3, a plurality of aluminum bars 4, and at least one temperature collection component as described in any of the above embodiments, wherein the plurality of aluminum bars are respectively arranged outside the two sides of the FPC board 3; the FPC board 3 includes a main body 31, at least one side of the main body 31 is connected to at least one first connecting cantilever 32, the second connecting section 12 and the temperature sensor 2 in each of the temperature collection components are connected to one of the first connecting cantilever 32, and the first connecting section 11 is connected to one of the aluminum bars 4. Further, the first collection nickel sheet 1 applies downward pressure to the first connecting cantilever 32, so that the first connecting cantilever 32 is offset downward relative to the main body 31.

[0039] In this embodiment, a slot 121 is provided in the first acquisition nickel sheet 1, the temperature sensor 2 is arranged in the slot 121, and the second connecting section 12 in the first acquisition nickel sheet 1 and the temperature sensor 2 are connected to the first connecting cantilever 32 of the FPC board 3, so that the temperature sensor 2 and the second connecting section 12 are arranged together in the first connecting cantilever 32, saving layout space; further, the first acquisition nickel sheet 1 adopts a folding structure, so that the first acquisition nickel sheet 1 has a certain elasticity, so that the first acquisition nickel sheet 1 can apply downward pressure to the first connecting cantilever 32 connected thereto, without the need to additionally design an auxiliary bracket or apply structural glue, so that the first connecting cantilever 32 can be moved downward under the pressure of the first acquisition nickel sheet 1 and attached to the upper surface of the external battery cell, so that the heat generated by the battery cell can be directly transferred to the temperature sensor 2 through the first connecting cantilever 32, avoiding the transfer process in the prior art that the heat of the battery cell needs to be sequentially transferred through the aluminum bar, the acquisition nickel sheet and then to the temperature sensor, thereby greatly reducing the deviation between the temperature collected by the temperature sensor 2 and the actual temperature, and improving the collection accuracy and the response speed of the thermal management system.

[0040] In addition, since the first collection nickel sheet 1 has a certain elasticity, it can absorb the uneven size difference of the battery cell in the vertical direction due to assembly tolerance; at the same time, the first collection nickel sheet 1 has a certain buffering effect, which can absorb the expansion force caused by the heating of the battery cell and protect the collection circuit board from being affected.

[0041] Furthermore, the first connecting cantilever 32 includes a fitting portion 321 and a bridging portion 322, wherein the fitting portion 321 is connected to the main body 31 through the bridging portion 322, and the second connecting section 12 and the temperature sensor 2 are both connected to the fitting portion 321, and under the downward pressure applied by the first acquisition nickel sheet 1, the fitting portion 321 contacts the surface of the external battery cell. Specifically, the fitting portion 321 is a square sheet structure with a large area, providing sufficient space for connecting with the second connecting section 12 and the temperature sensor 2, and having sufficient area to contact with the surface of the external battery cell, so as to facilitate the conduction of the heat of the external battery cell to the temperature sensor 2; and the bridging portion 322 is in the shape of a long strip, and under the downward pressure applied by the first acquisition nickel sheet 1, the long strip bridging portion 322 is easy to tilt, so as to facilitate the connection of the fitting portion 321 and the main body 31 at different levels.

[0042] Furthermore, it also includes a plurality of second collection nickel sheets 5, and a plurality of second connection cantilevers 33 are respectively connected to both sides of the main body 31, and one end of each second collection nickel sheet 5 is connected to one of the second connection cantilevers 33, and the other end is connected to one of the aluminum bars 4. In this embodiment, for the position where the temperature sensor 2 does not need to be set, the second collection nickel sheet 5 is used for connection. The second collection nickel sheet 5 is a conventional long strip sheet structure, which can save costs on the one hand, and ensure that the FPC board 3 at the non-temperature collection position can be suspended relative to the surface of the battery cell on the other hand, so as to reduce the influence of the heat of the battery cell on other components on the FPC board 3.

[0043] Example 3

[0044] The utility model also provides a battery pack, which includes the temperature acquisition component described in any one of Embodiment 1.

[0045] Example 4

[0046] The utility model also provides a battery pack, which includes the acquisition circuit board described in any one of the second embodiments.

[0047] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A temperature collection component, characterized in that: The invention comprises a first nickel acquisition sheet (1) and a temperature sensor (2); the first nickel acquisition sheet (1) comprises a first connecting section (11), a second connecting section (12) and a buffer folding section (13); the first connecting section (11) and the second connecting section (12) are located in different horizontal planes, and the first connecting section (11) and the second connecting section (12) are connected via the buffer folding section (13); a slotted portion (121) is provided in the second connecting section (12), and the temperature sensor (2) is located in the slotted portion (121); the first connecting section (11) is connected to an external aluminum bar (4), and the second connecting section (12) and the temperature sensor (2) are both connected to an external FPC board (3).

2. The temperature acquisition component according to claim 1, characterized in that: A gap (14) is provided in the vertical direction between the first connecting section (11) and the buffer folding section (13), and / or between the second connecting section (12) and the buffer folding section (13).

3. The temperature acquisition component according to claim 1, characterized in that: Both ends of the buffer folding section (13) are respectively provided with arc-shaped portions (131), and the arc-shaped portions (131) at both ends are respectively connected to the first connecting section (11) and the second connecting section (12).

4. The temperature acquisition component according to claim 1, characterized in that: The length direction of the first nickel collecting sheet (1) is parallel to the arrangement direction of the external battery cells, and a protrusion (111) is provided on one side of the first connecting section (11), and the protrusion (111) is connected to the external aluminum bar (4).

5. A collection circuit board, characterized in that: The invention comprises an FPC board (3), a plurality of aluminum bars (4), and at least one temperature acquisition component according to any one of claims 1 to 4, wherein the plurality of aluminum bars are respectively arranged outside the two sides of the FPC board (3); the FPC board (3) comprises a main body (31), at least one side of the main body (31) is connected to at least one first connecting cantilever (32), the second connecting section (12) and the temperature sensor (2) in each of the temperature acquisition components are connected to one of the first connecting cantilever (32), and the first connecting section (11) is connected to one of the aluminum bars (4).

6. The acquisition circuit board according to claim 5, characterized in that: The first collecting nickel sheet (1) applies downward pressure to the first connecting cantilever (32), so that the first connecting cantilever (32) is deflected downward relative to the main body (31).

7. The acquisition circuit board according to claim 6, characterized in that: The first connecting cantilever (32) comprises a fitting portion (321) and a bridging portion (322); the fitting portion (321) is connected to the main body (31) via the bridging portion (322); the second connecting section (12) and the temperature sensor (2) are both connected to the fitting portion (321); and under the downward pressure applied by the first acquisition nickel sheet (1), the fitting portion (321) contacts the surface of the external battery cell.

8. The acquisition circuit board according to claim 5, characterized in that: It also comprises a plurality of second collection nickel sheets (5), and a plurality of second connection cantilevers (33) are respectively connected to both sides of the main body (31), and one end of each second collection nickel sheet (5) is connected to one of the second connection cantilevers (33), and the other end is connected to one of the aluminum bars (4).

9. A battery pack, characterized in that: The battery pack comprises the temperature acquisition component according to any one of claims 1-4.

10. A battery pack, characterized in that: The battery pack comprises a collection circuit board according to any one of claims 5-8.

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