Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction and a second direction which are intersected, the battery pack comprises a plurality of battery monomers, an electrical isolation plate and a signal acquisition plate, and the plurality of battery monomers are arranged along the first direction; the electrical isolation plate is arranged on one side of the plurality of single batteries along a second direction and is connected with the plurality of single batteries; the signal acquisition board comprises a board body and a first temperature acquisition part; the board body is arranged on one side, far away from the battery monomers, of the electrical isolation board along a second direction and is connected with the electrical isolation board; the first temperature acquisition part comprises a first section, a second section and a first temperature acquisition piece; the first section is connected to one side of the plate body along the first direction and is at least partially arranged on one side of the electrical isolation plate away from the plate body; the second section is connected with the first section and is at least partially arranged on one side, far away from the electrical isolation plate, of the first section, and the first temperature acquisition piece is connected to the second section and is connected with the battery monomer. According to the invention, the material cost can be saved, and the temperature sampling precision can be ensured.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and an electrical device. Background Technology

[0002] In the new energy vehicle industry, FPCs (Flexible Printed Circuits) are typically used to collect voltage and temperature data from individual cells of the power battery to obtain the battery's operating status. For a single-layer signal acquisition board, voltage and temperature acquisition lines need to be laid out simultaneously. Furthermore, buffer structures for both voltage and temperature acquisition lines need to be extended along the width direction. Especially at the FPC end, not only are connection ports required, but temperature acquisition line buffer structures also need to be installed. This increases the width of the FPC and reduces the utilization rate of FPC raw materials. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack that solves the problem that the width of the FPC increases and the utilization rate of FPC raw materials is reduced when the existing flexible signal acquisition board requires both a wiring port and a temperature acquisition line buffer structure to be set at the end of the flexible signal acquisition board. Another purpose of this application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of this application has intersecting first and second directions, including:

[0005] Multiple battery cells are arranged along the first direction;

[0006] An electrical isolation plate is disposed on one side of the plurality of battery cells along the second direction and the first direction, and is connected to the plurality of battery cells;

[0007] The signal acquisition board includes:

[0008] A plate body is disposed along the second direction on the side of the electrical isolation plate away from the battery cell, and the plate body is connected to the electrical isolation plate;

[0009] The first temperature acquisition unit includes a first segment, a second segment, and a first temperature acquisition element; the first segment is connected to one side of the plate along the first direction and is at least partially disposed on the side of the electrical isolation plate away from the plate; the second segment is connected to the first segment and is at least partially disposed on the side of the first segment away from the electrical isolation plate, and the second segment is connected to the battery cell; the first temperature acquisition element is connected to the second segment and disposed close to the battery cell, and is connected to the battery cell.

[0010] In some embodiments, the first temperature acquisition unit further includes:

[0011] A first transition section is disposed on one side of the plate along the first direction and connected to the plate; at least a portion of the first transition section is disposed on one side of the electrical isolation plate along the first direction; the side of the first transition section away from the plate is connected to the first section.

[0012] The second adapter section is connected to the side of the first section closest to the battery cell; the side of the second adapter section furthest from the first section is connected to the second section.

[0013] In some embodiments, the battery pack further has a third direction intersecting the first direction and the second direction, the second transition segment extending along the second direction, and along the third direction, the second transition segment connecting to the same side of the first segment and the second segment.

[0014] In some embodiments, along the first direction, the second transition segment is connected to the same side of the first segment and the second segment away from the first transition segment.

[0015] In some embodiments, the first temperature acquisition unit further includes a buffer, which is disposed between the first segment and the second segment and connected to the first segment and the second segment respectively.

[0016] In some embodiments, the first temperature acquisition unit further includes:

[0017] The first reinforcing plate is disposed on the side of the first temperature acquisition device close to the battery cell, and is connected to the battery cell, the second segment and the first temperature acquisition device respectively;

[0018] The second reinforcing plate is disposed on the side of the second segment away from the battery cell and is connected to the second segment and the electrical isolation plate respectively. The thickness of the first reinforcing plate is less than the thickness of the second reinforcing plate. The first temperature acquisition element is embedded on the side of the second segment facing the battery cell.

[0019] In some embodiments, the electrical isolation plate has a first limiting groove on the side facing the battery cell, and at least a portion of the second reinforcing plate is disposed in the first limiting groove and connected to the electrical isolation plate.

[0020] In some embodiments,

[0021] The electrical isolation plate has a through hole that extends through the electrical isolation plate along the second direction;

[0022] The signal acquisition board further includes a second temperature acquisition unit, which includes:

[0023] The third segment is disposed on one side of the plate along the third direction and connected to the plate; the third segment is disposed on the side of the electrical isolation plate away from the battery cell;

[0024] The third adapter section is connected to one side of the third section along the first direction; the third adapter section passes through the through hole, and the side of the third adapter section away from the third section is located on the side of the electrical isolation plate closer to the battery cell;

[0025] The fourth segment is connected to the side of the third transition segment away from the third segment; the fourth segment is disposed between the electrical isolation plate and the battery cell, and is connected to both the electrical isolation plate and the battery cell respectively;

[0026] The second temperature acquisition device is connected to the fourth segment and positioned close to the battery cell, and is connected to both the fourth segment and the battery cell.

[0027] In some embodiments, the electrical isolation plate has a second limiting groove on the side facing the battery cell. The second limiting groove is disposed on one side of the through hole along the first direction, and a portion of the fourth segment is disposed in the second limiting groove and connected to the electrical isolation plate.

[0028] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0029] Beneficial Effects: Compared with the prior art, a battery pack according to an embodiment of this application has intersecting first and second directions, including multiple battery cells, an electrical isolation plate, and a signal acquisition board. The multiple battery cells are arranged along the first direction; the electrical isolation plate is disposed along the second direction on one side of the multiple battery cells and connected to the multiple battery cells; the signal acquisition board includes a plate body and a first temperature acquisition unit, the plate body is disposed along the second direction on the side of the electrical isolation plate away from the battery cells, and the plate body is connected to the electrical isolation plate; the first temperature acquisition unit includes a first segment, a second segment, and a first temperature acquisition element; the first segment is connected to one side of the plate body along the first direction and is at least partially disposed on the side of the electrical isolation plate away from the plate body; the second segment is connected to the first segment and is at least partially disposed on the side of the first segment away from the electrical isolation plate, and the second segment is connected to the battery cells; the first temperature acquisition element is connected to the second segment and disposed close to the battery cells, and is connected to the battery cells. By setting the first temperature acquisition unit on one side of the plate body in the length direction of the signal acquisition board, this application can reduce the size occupied by the signal acquisition board in the width direction, thereby improving the utilization rate of FPC raw materials. Furthermore, by including a first segment and a second segment in the first temperature acquisition unit, the acquisition surface of the first temperature acquisition element is typically positioned on the side of the second segment facing the battery cell. By folding the first segment over the side of the electrical isolation plate facing the battery cell, the first temperature acquisition element can reach between the electrical isolation plate and the battery cell. Then, by folding the second segment over the side of the first segment facing the battery cell, the acquisition surface of the first temperature acquisition element can continue to face the battery cell. In this way, the utilization rate of FPC raw materials can be improved, and the acquisition surface of the first temperature acquisition element can be as close as possible to the surface of the battery cell, thereby reducing the error generated during temperature acquisition and improving the acquisition accuracy.

[0030] Compared with the prior art, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments. It is understood that the electrical device according to an embodiment of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of this application;

[0033] Figure 2 This is an exploded view of a battery pack according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the connection between the electrical isolation board and the signal acquisition board of a battery pack according to an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the structure of a battery pack with its electrical isolation board connected to a signal acquisition board and facing the battery cell side, according to an embodiment of this application.

[0036] Figure 5 yes Figure 4 Enlarged view of section A;

[0037] Figure 6 yes Figure 4 Enlarged view of section B;

[0038] Figure 7 This is a schematic diagram of the overall structure of a signal acquisition board for a battery pack according to an embodiment of this application;

[0039] Figure 8 yes Figure 7 Enlarged view of section C;

[0040] Figure 9 yes Figure 7 Enlarged view of section D;

[0041] Figure 10 This is an unfolded diagram of the initial state of a signal acquisition board according to an embodiment of this application;

[0042] Figure 11 This is a schematic diagram of a signal acquisition board folded and facing the battery cell side according to an embodiment of this application;

[0043] Figure 12 yes Figure 11 Side view;

[0044] Figure 13 yes Figure 11 A 3D view of a folded signal acquisition board;

[0045] Figure 14 This is an unfolded view of the initial state of another signal acquisition board according to an embodiment of this application;

[0046] Figure 15 This is a schematic diagram of another signal acquisition board folded and facing the battery cell side, according to another embodiment of this application.

[0047] Figure 16 yes Figure 15 Side view;

[0048] Figure 17 yes Figure 15 A 3D view of a folded signal acquisition board.

[0049] Reference numerals: 1. Battery cell; 2. Electrical isolation plate; 21. First limiting groove; 22. Through hole; 23. Second limiting groove; 3. Signal acquisition board; 31. Board body; 32. First temperature acquisition unit; 321. First segment; 322. Second segment; 323. First temperature acquisition component; 324. First transition segment; 325. Second transition segment; 326. Buffer component; 327. First reinforcing plate; 328. Second reinforcing plate; 33. Second temperature acquisition unit; 331. Third segment; 332. Third transition segment; 333. Fourth segment; 334. Second temperature acquisition component; 335. Third reinforcing plate; 336. Fourth reinforcing plate; X, First direction; Z, Second direction; Y, Third direction. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0051] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles from 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles from 10° is considered parallel.

[0052] It should also be noted that in the accompanying drawings of this application, arrows labeled X indicate the first direction X, arrows labeled Z indicate the second direction Z, and arrows labeled Y indicate the third direction Y. The introduction of the first direction X, the second direction Z, and the third direction Y is to facilitate the description of the structural positional relationships of the battery pack, thereby aiding in understanding its structure. In the embodiments of this application, the first direction X is the direction in which multiple battery cells are arranged, and it is also the length direction of the signal acquisition board; the second direction Z is the direction in which the battery cells and the electrical isolation board are arranged, and it is also the thickness direction of the signal acquisition board; the third direction Y is the width direction of the signal acquisition board; and the first direction X, the second direction Z, and the third direction Y intersect each other, and furthermore, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0053] In the new energy electric vehicle industry, multiple battery cells are arranged along a first direction to form a battery pack. A flexible signal acquisition board is installed above the battery pack. This board acquires the voltage of each battery cell via nickel strips and also uses a thermistor to acquire the temperature of the middle and ends of the battery pack. At the end of the signal acquisition board, the wide FPC (Flexible Printed Circuit) connector occupies space where the thermistor (temperature acquisition section) buffer structure extends directly from the side (long side) of the FPC. This increases the width of the FPC signal acquisition board, resulting in low utilization of the raw materials.

[0054] In view of this, embodiments of this application provide a battery pack aimed at solving the aforementioned technical problems.

[0055] Please refer to the following: Figures 1-5 , Figures 7-8 This application provides a battery pack having intersecting first direction X and second direction Z, including multiple battery cells 1, an electrical isolation plate 2, and a signal acquisition board 3. The multiple battery cells 1 are arranged along the first direction X; the electrical isolation plate 2 is disposed on one side of the multiple battery cells 1 along the second direction Z and is connected to the multiple battery cells 1; the signal acquisition board 3 includes a plate body 31 and a first temperature acquisition part 32, the plate body 31 is disposed on the side of the electrical isolation plate 2 away from the battery cells 1 along the second direction Z, and the plate body 31 is connected to the electrical isolation plate 2. The first temperature acquisition unit 32 includes a first segment 321, a second segment 322, and a first temperature acquisition element 323. The first segment 321 is connected to one side of the plate 31 along the first direction X and is at least partially disposed on the side of the electrical isolation plate 2 away from the plate 31. The second segment 322 is connected to the first segment 321 and is at least partially disposed on the side of the first segment 321 away from the electrical isolation plate 2. The second segment 322 is connected to the battery cell 1. The first temperature acquisition element 323 is connected to the second segment 322 and disposed close to the battery cell 1, and is connected to the battery cell 1.

[0056] In this embodiment, by positioning the first temperature acquisition unit 32 on one side of the board 31 along the length of the signal acquisition board 3, the size occupied by the signal acquisition board 3 along the width direction can be reduced, thereby improving the utilization rate of the FPC acquisition board raw materials. Furthermore, by including a first segment 321 and a second segment 322 in the first temperature acquisition unit 323, the acquisition surface of the first temperature acquisition element 323 is typically positioned on the side of the second segment 322 facing the battery cell 1. By folding the first segment 321 over the side of the electrical isolation plate 2 facing the battery cell 1, the first temperature acquisition element 323 can reach between the electrical isolation plate 2 and the battery cell 1. Then, by folding the second segment 322 over the side of the first segment 321 facing the battery cell 1, the acquisition surface of the first temperature acquisition element 323 continues to face the battery cell 1. This not only improves the utilization rate of the FPC acquisition board raw materials but also ensures that the acquisition surface of the first temperature acquisition element 323 is as close as possible to the surface of the battery cell 1, reducing errors during temperature acquisition and improving acquisition accuracy.

[0057] It should be noted that in this embodiment, during the initial production stage of the FPC signal acquisition board 3, the FPC board is a planar structure. At this time, the board body 31, the first segment 321, and the second segment 322 are on the same plane. The first temperature acquisition element 323 is usually connected to the second segment 322, which facilitates the placement of the first temperature acquisition element 323 at different positions of the battery cell 1 according to the different lengths of the second segment 322. Typically, since the temperature acquisition line is embedded in the signal acquisition board 3, and at least embedded in the first segment 321 and the second segment 322, the first temperature acquisition element 323 needs to be electrically connected to the temperature acquisition line. Therefore, when the first temperature acquisition element 323 is connected to the second segment 322, it needs to be partially embedded in the second segment 322. Simultaneously, since the FPC board is relatively thin, the first temperature acquisition element 323 partially protrudes from the side of the second segment 322 facing the battery cell 1, allowing the first temperature acquisition element 323 to directly contact the battery cell 1 for temperature acquisition. Meanwhile, in order to ensure the insulation performance of the signal acquisition board 3, the first temperature acquisition element 323 can only penetrate the side of the second segment 322 facing the battery cell 1. This ensures that the side of the second segment 322 away from the battery cell 1 remains flat, and the temperature acquisition line will not be exposed outside the FPC material, thus ensuring insulation.

[0058] Please refer to the following: Figures 10-17It should be noted that in this embodiment, during initial production, neither the first segment 321 nor the second segment 322 of the FPC signal acquisition board 3 is bent. At this time, the first temperature acquisition element 323 is typically embedded in the second segment 322 on the side facing the battery cell 1, while the first temperature acquisition part 32 is positioned along the first direction X (the length direction of the signal acquisition board 3) on one side of the board body 31 and extends along the first direction X. In this case, the first temperature acquisition element 323 may not be able to contact the temperature acquisition position of the battery cell 1. Therefore, it is necessary to bend the first temperature acquisition part 32. By setting the first temperature acquisition part 32 to be bent for the first time, The first segment 321 is folded from the side of the electrical isolation plate 2 away from the battery cell 1 to the side of the electrical isolation plate 2 facing the battery cell 1. At this time, the first segment 321, along with the second segment 322, undergoes a 180-degree fold. The first temperature acquisition element 323 is also folded to the side of the second segment 322 away from the battery cell 1. If the second segment 322 is directly connected to the battery cell 1, part of the second segment 322 will be spaced between the first temperature acquisition element 323 and the battery cell 1. Although the temperature of the battery cell 1 can still be acquired, there will be temperature acquisition errors due to the spaced part of the second segment 322 between the second segment 322 and the battery cell 1. When the second segment 322 is folded from the coplanar position with the first segment 321 to the space between the first segment 321 and the battery cell 1, the second segment 322 undergoes a 180-degree fold. The first temperature acquisition element 323 also folds to the side facing the battery cell 1. At this time, the first temperature acquisition element 323 can directly contact the battery cell 1 to acquire the temperature, which can effectively improve the accuracy of temperature acquisition.

[0059] Please refer to the following: Figure 5 , Figure 8 , Figures 11-13 , Figures 15-17 In some embodiments, the first temperature acquisition unit 32 further includes a first adapter section 324 and a second adapter section 325. The first adapter section 324 is disposed along the first direction X on one side of the plate 31 and connected to the plate 31. At least a portion of the first adapter section 324 is disposed along the first direction X on one side of the electrical isolation plate 2. The side of the first adapter section 324 away from the plate 31 is connected to the first section 321. The second adapter section 325 is connected to the side of the first section 321 near the battery cell 1. The side of the second adapter section 325 away from the first section 321 is connected to the second section 322.

[0060] In this embodiment of the application, by setting the first transition section 324 and the second transition section 325, the transition connection between the first section 321 and the plate 31, as well as the transition connection between the first section 321 and the second section 322, can be realized, effectively protecting the temperature acquisition line and reducing the probability of the temperature acquisition line breaking and failing.

[0061] Specifically, the flexible signal acquisition board 3 has temperature and voltage acquisition lines internally arranged. The temperature acquisition lines extend to the first segment 321 and the second segment 322. These temperature acquisition lines are thin and relatively fragile. This application connects the board body 31 and the first segment 321 by setting a first transition segment 324. At this time, the first transition segment 324 can be directly folded at 90 degrees to the board body 31 or bend in an arc shape, and the first transition segment 324 can be directly folded at 90 degrees to the first segment 321 or bend in an arc shape, thus achieving a 180-degree bend of the first segment 321 relative to the board. By setting a second transition section 325 to connect the first section 321 and the second section 322, the second section 322 can be bent 180 degrees relative to the first section 321 by using a 90-degree direct fold or an arc-shaped transition bend between the second transition section 325 and the first section 321, and by using a 90-degree direct fold or an arc-shaped transition bend between the second transition section 325 and the second section 322. This structure can avoid the temperature acquisition line from breaking and failing due to a direct 180-degree bend of the FPC board, thus ensuring the yield of the signal acquisition board 3.

[0062] Please refer to the following: Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figures 10-13 In some embodiments, the battery pack further has a third direction Y intersecting the first direction X and the second direction Z, the second transition segment 325 extending along the second direction Z and along the third direction Y, the second transition segment 325 being connected to the same side of the first segment 321 and the second segment 322.

[0063] In this embodiment of the application, the first transition segment 324 is connected to the first segment 321 on one side along the first direction X, and the second transition segment 325 is connected to the first segment 321 on the third direction Y. This enables the first segment 321 and the second segment 322 to be bent from different directions. At this time, the use of FPC material along the first direction X can be reduced, thereby improving the utilization rate of FPC raw materials.

[0064] Please refer to the following: Figures 14-17 In some embodiments, along the first direction X, the second transition segment 325 is connected to the same side of the first segment 321 and the second segment 322 away from the first transition segment 324.

[0065] In this embodiment of the application, when the first temperature acquisition part 32 is not bent at the beginning, the second segment 322 is set along the first direction X on the side of the first segment 321 away from the plate 31. At this time, the temperature acquisition line can be directly set to extend along the first direction X and embedded in the first segment 321 and the second segment 322 respectively, which effectively reduces the wiring difficulty of the temperature acquisition line.

[0066] like Figure 8 As shown, in some embodiments, the first temperature acquisition unit 32 further includes a buffer 326, which is disposed between the first segment 321 and the second segment 322 and connected to the first segment 321 and the second segment 322 respectively.

[0067] In this embodiment of the application, by setting a buffer 326, it can fill the space between the first segment 321 and the second segment 322 and connect the first segment 321 and the second segment 322 respectively, thus ensuring the stability of the bending of the first segment 321 and the second segment 322.

[0068] The buffer 326 can be foam or other soft material, with double-sided adhesive on both sides, which can be bonded to the first segment 321 and the second segment 322 respectively.

[0069] Please refer to the following: Figure 5 and Figure 8 In some embodiments, the first temperature acquisition unit 32 further includes a first reinforcing plate 327 and a second reinforcing plate 328. The first reinforcing plate 327 is disposed on the side of the first temperature acquisition element 323 close to the battery cell 1 and is connected to the battery cell 1, the second segment 322 and the first temperature acquisition element 323 respectively. The second reinforcing plate 328 is disposed on the side of the second segment 322 away from the battery cell 1 and is connected to the second segment 322 and the electrical isolation plate 2 respectively. The thickness of the first reinforcing plate 327 is less than the thickness of the second reinforcing plate 328. The first temperature acquisition element 323 is embedded in the side of the second segment 322 facing the battery cell 1.

[0070] In this embodiment, the first reinforcing plate 327 and the second reinforcing plate 328 can reinforce the first temperature acquisition element 323 after it is connected to the second segment 322, effectively preventing the first temperature acquisition element 323 from being damaged by pressure, and ensuring the structural stability of the first temperature acquisition element 323 after it is connected to the second segment 322, thereby ensuring the stability of the conductive connection between the temperature acquisition line and the first temperature acquisition element 323.

[0071] It should be noted that, in this embodiment, the thickness of the first reinforcing plate 327 is less than the thickness of the second reinforcing plate 328. This ensures that the temperature of the battery cell 1 can reach the first temperature acquisition element 323 through a smaller transmission path, thus guaranteeing the accuracy of temperature acquisition by the first temperature acquisition element 323. The first reinforcing plate 327 is preferably bonded to the battery cell 1 using thermally conductive adhesive, which ensures thermal conductivity and temperature acquisition accuracy.

[0072] Furthermore, the thickness of the second reinforcing plate 328 is greater than that of the first reinforcing plate 327, which fills the gap between the second segment 322 and the electrical isolation plate 2, ensuring the stability of the fixed position of the second segment 322. Additionally, preferably, a clearance space is provided at the corresponding positions of the second reinforcing plate 328 and the first temperature acquisition element 323, further preventing the second reinforcing plate 328 from damaging the first temperature acquisition element 323.

[0073] like Figure 4 and Figure 5 As shown, in some embodiments, the electrical isolation plate 2 is provided with a first limiting groove 21 on the side facing the battery cell 1, and at least a portion of the second reinforcing plate 328 is disposed in the first limiting groove 21 and connected to the electrical isolation plate 2.

[0074] In this embodiment of the application, by setting the first limiting groove 21, at least a portion of the second reinforcing plate 328 can be accommodated. The second reinforcing plate 328 is connected to the second segment 322. At this time, the positioning and limiting of the second segment 322 can be realized, so as to avoid the second segment 322 shifting and causing the connection between the first temperature acquisition element 323 and the battery cell 1 to fail, thus ensuring the accuracy of temperature acquisition.

[0075] Please refer to the following: Figure 4 , Figure 6 , Figure 7 and Figure 9In some embodiments, the electrical isolation plate 2 has a through hole 22 that penetrates the electrical isolation plate 2 along the second direction Z; the signal acquisition board 3 further includes a second temperature acquisition unit 33, which includes a third segment 331, a third transition segment 332, a fourth segment 333, and a second temperature acquisition element 334. The third segment 331 is disposed on one side of the board body 31 along the third direction Y and is connected to the board body 31; the third segment 331 is disposed on the side of the electrical isolation plate 2 away from the battery cell 1; the third transition segment 332 is connected to the third segment 331 along the first direction. On one side of X; the third adapter segment 332 passes through the through hole 22, and the side of the third adapter segment 332 away from the third segment 331 is located on the side of the electrical isolation plate 2 close to the battery cell 1; the fourth segment 333 is connected to the side of the third adapter segment 332 away from the third segment 331; the fourth segment 333 is disposed between the electrical isolation plate 2 and the battery cell 1, and is connected to the electrical isolation plate 2 and the battery cell 1 respectively; the second temperature acquisition element 334 is connected to the fourth segment 333 and disposed close to the battery cell 1, and is connected to the fourth segment 333 and the battery cell 1 respectively.

[0076] In this embodiment of the application, by setting a second temperature acquisition unit 33, which is located at the middle position on one side of the plate 31 along the third direction Y, the temperature of the battery cell 1 located in the middle among the multiple battery cells 1 arranged along the first direction X can be acquired. The third segment 331 is used to connect to the plate 31 and extends away from the plate 31 in the Y direction, which facilitates the bending of the third transition segment 332. The third transition segment 332 is bent toward the battery cell 1, which facilitates the folding of the fourth segment 333 from the coplanar with the plate 31 to the side of the electrical isolation plate 2 facing the battery cell 1. The through hole 22 is provided for the third transition segment 332 and the fourth segment 333 to pass through and reach the side of the electrical isolation plate 2 facing the battery cell 1. The fourth segment 333 is bent between the electrical isolation plate 2 and the battery cell 1 relative to the third transition segment. At this time, the fourth segment 333 is located between the electrical isolation plate 2 and the battery cell 1. The second temperature acquisition element 334 is connected to the side of the fourth segment 333 close to the battery cell 1. At this time, the second temperature acquisition element 334 can directly contact the battery cell 1 to ensure the temperature acquisition accuracy.

[0077] It should be noted that when neither the third transition section 332 nor the fourth section 333 is folded, the second temperature acquisition element 334 is also located on the side of the fourth section 333 facing the battery cell 1. At this time, two bends of approximately 90 degrees can be made to achieve contact sampling between the second temperature acquisition element 334 and the battery cell 1.

[0078] It should be noted that, in this embodiment, the first temperature acquisition element 323 and the second temperature acquisition element 334 can both be disposed on the reverse side of the FPC sampling plate before initial folding, with both the first temperature acquisition element 323 and the second temperature acquisition element 334 disposed on the side of the plate away from the voltage acquisition nickel sheet. At this time, through the folding method provided in this embodiment, the first temperature acquisition unit 32 and the second temperature acquisition unit 33 can both be positioned facing the battery cell 1 and in contact with the battery cell 1 to perform temperature sampling.

[0079] Please refer to the following: Figure 4 and Figure 6 In some embodiments, the electrical isolation plate 2 has a second limiting groove 23 on the side facing the battery cell 1. The second limiting groove 23 is disposed on one side of the through hole 22 along the first direction X. A portion of the fourth segment 333 is disposed in the second limiting groove 23 and connected to the electrical isolation plate 2.

[0080] In this embodiment of the application, by setting the second limiting groove 23, the positioning and limiting of the fourth segment 333 can be realized, further preventing the fourth segment 333 from moving along the first direction X and the third direction Y, and ensuring the stability of the connection between the fourth segment 333 and the battery cell 1.

[0081] Please refer to the following: Figure 6 and Figure 9 In some embodiments, the second temperature acquisition unit 33 further includes a third reinforcing plate 335 and a fourth reinforcing plate 336. The third reinforcing plate 335 is disposed on the side of the fourth segment 333 close to the battery cell 1 and is connected to the battery cell 1, the fourth segment 333 and the second temperature acquisition element 334 respectively. The fourth reinforcing plate 336 is disposed on the side of the fourth segment 333 away from the battery cell 1 and is connected to the fourth segment 333 and the electrical isolation plate 2 respectively. The thickness of the third reinforcing plate 335 is less than the thickness of the fourth reinforcing plate 336. The second temperature acquisition element 334 is embedded in the side of the fourth segment 333 facing the battery cell 1.

[0082] In this embodiment, by providing a third reinforcing plate 335 and a fourth reinforcing plate 336, the connection between the second temperature acquisition element 334 and the fourth segment 333 can be structurally strengthened, effectively ensuring the connection stability between the second temperature acquisition element 334 and the fourth segment 333, effectively protecting the second temperature acquisition element 334 from being damaged by pressure, and at the same time ensuring the stability of the conductive connection between the temperature acquisition line and the second temperature acquisition element 334.

[0083] It should be noted that, in this embodiment, the thickness of the third reinforcing plate 335 is less than the thickness of the fourth reinforcing plate 336. This ensures that the temperature of the battery cell 1 can reach the second temperature acquisition element 334 through a smaller transmission path, thus guaranteeing the accuracy of temperature acquisition by the second temperature acquisition element. The third reinforcing plate 335 is preferably bonded to the battery cell 1 using thermally conductive adhesive, which ensures thermal conductivity and temperature acquisition accuracy.

[0084] In addition, it is preferable to set a clearance space at the position corresponding to the fourth reinforcing plate 336 and the second temperature acquisition element 334, so as to further avoid the fourth reinforcing plate 336 from damaging the temperature acquisition element as shown in the figure.

[0085] Furthermore, in this embodiment, a portion of the fourth reinforcing plate 336 is disposed within the second limiting groove 23 and connected to the electrical isolation plate 2. In this case, the fourth reinforcing plate 336 can fill the gap between the fourth segment 333 and the electrical isolation plate 2. While ensuring that the third reinforcing plate 335 is connected to the battery cell 1 via thermally conductive adhesive, the connection between the fourth reinforcing plate 336 and the electrical isolation plate 2 ensures the stability of the fixed position of the fourth segment 333 and the second temperature acquisition element 334.

[0086] Accordingly, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments.

[0087] It is understood that the electrical device in the embodiments of this application includes all the technical features and effects of the aforementioned secondary battery or battery pack, which will not be repeated here.

[0088] Of course, the electrical devices referred to in this application can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] The battery pack and power device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, Having intersecting first direction (X) and second direction (Z), including: Multiple battery cells (1) are arranged along the first direction (X); An electrical isolation plate (2) is disposed on one side of the plurality of battery cells (1) along the second direction (Z) and connected to the plurality of battery cells (1); Signal acquisition board (3), including: A plate (31) is disposed along the second direction (Z) on the side of the electrical isolation plate (2) away from the battery cell (1), and the plate (31) is connected to the electrical isolation plate (2); The first temperature acquisition unit (32) includes a first segment (321), a second segment (322), and a first temperature acquisition element (323); the first segment (321) is connected to one side of the plate (31) along the first direction (X) and is at least partially disposed on the side of the electrical isolation plate (2) away from the plate (31); the second segment (322) is connected to the first segment (321) and is at least partially disposed on the side of the first segment (321) away from the electrical isolation plate (2), and the second segment (322) is connected to the battery cell (1); the first temperature acquisition element (323) is connected to the second segment (322) and disposed close to the battery cell (1), and is connected to the battery cell (1).

2. The battery pack according to claim 1, characterized in that, The first temperature acquisition unit (32) also includes: A first transition section (324) is disposed on one side of the plate (31) along the first direction (X) and connected to the plate (31). At least a portion of the first transition section (324) is disposed on one side of the electrical isolation plate (2) along the first direction (X). The side of the first transition section (324) away from the plate (31) is connected to the first section (321). The second adapter section (325) is connected to the side of the first section (321) near the battery cell (1); the side of the second adapter section (325) away from the first section (321) is connected to the second section (322).

3. The battery pack according to claim 2, characterized in that, The battery pack also has a third direction (Y) intersecting the first direction (X) and the second direction (Z), the second transition segment (325) extending along the second direction (Z) and along the third direction (Y), the second transition segment (325) connecting to the same side of the first segment (321) and the second segment (322).

4. The battery pack according to claim 2, characterized in that, Along the first direction (X), the second transition segment (325) is connected to the same side of the first segment (321) and the second segment (322) away from the first transition segment (324).

5. The battery pack according to claim 1, characterized in that, The first temperature acquisition unit (32) further includes a buffer (326), which is disposed between the first segment (321) and the second segment (322) and is connected to the first segment (321) and the second segment (322) respectively.

6. The battery pack according to claim 2, characterized in that, The first temperature acquisition unit (32) also includes: The first reinforcing plate (327) is disposed on the side of the first temperature acquisition device (323) close to the battery cell (1), and is connected to the battery cell (1), the second segment (322) and the first temperature acquisition device (323) respectively. The second reinforcing plate (328) is disposed on the side of the second segment (322) away from the battery cell (1) and is connected to the second segment (322) and the electrical isolation plate (2) respectively. The thickness of the first reinforcing plate (327) is less than the thickness of the second reinforcing plate (328). The first temperature acquisition element (323) is embedded on the side of the second segment (322) facing the battery cell (1).

7. The battery pack according to claim 6, characterized in that, The electrical isolation plate (2) has a first limiting groove (21) on the side facing the battery cell (1), and at least a portion of the second reinforcing plate (328) is disposed in the first limiting groove (21) and connected to the electrical isolation plate (2).

8. The battery pack according to claim 3, characterized in that, The electrical isolation plate (2) has a through hole (22) that penetrates the electrical isolation plate (2) along the second direction (Z); The signal acquisition board (3) further includes a second temperature acquisition unit (33), which includes: The third segment (331) is disposed on one side of the plate (31) along the third direction (Y) and connected to the plate (31); the third segment (331) is disposed on the side of the electrical isolation plate (2) away from the battery cell (1); The third adapter section (332) is connected to the third section (331) on one side along the first direction (X); the third adapter section (332) passes through the through hole (22), and the side of the third adapter section (332) away from the third section (331) is located on the side of the electrical isolation plate (2) close to the battery cell (1); The fourth segment (333) is connected to the side of the third transition segment (332) away from the third segment (331); the fourth segment (333) is disposed between the electrical isolation plate (2) and the battery cell (1), and is connected to the electrical isolation plate (2) and the battery cell (1) respectively; The second temperature acquisition element (334) is connected to the fourth segment (333) and disposed close to the battery cell (1), and is connected to the fourth segment (333) and the battery cell (1) respectively.

9. The battery pack according to claim 8, characterized in that, The electrical isolation plate (2) also has a second limiting groove (23) on the side facing the battery cell (1). The second limiting groove (23) is disposed on one side of the through hole (22) along the first direction (X). A portion of the fourth segment (333) is disposed in the second limiting groove (23) and connected to the electrical isolation plate (2).

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

Images