Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack comprises a box body, a battery monomer, a connecting conductor and an acquisition terminal, the box body is provided with an accommodating cavity, the battery monomer, the connecting conductor and the acquisition terminal are arranged in the accommodating cavity, and the connecting conductor is conductively connected with the battery monomer; the acquisition terminal comprises a conductive part, a circuit board, a voltage acquisition wire harness, a plurality of temperature acquisition wire harnesses and a temperature acquisition unit, the conductive part is conductively connected with the connecting conductor, the circuit board is arranged on one side, far away from the connecting conductor, of the conductive part and conductively connected with the conductive part, and the voltage acquisition wire harness is conductively connected with the circuit board and the conductive part respectively; the plurality of temperature acquisition wire harnesses are electrically connected with the circuit board, and the temperature acquisition unit is electrically connected with the circuit board and the temperature acquisition wire harnesses. According to the acquisition terminal, the voltage signal and the temperature signal are integrated in one acquisition terminal, the material and assembly cost is reduced, the occupation of the surface space of the connecting conductor is reduced, and the assembly efficiency is improved at the same time.

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] The battery management system inside the battery pack is equipped with voltage and temperature signal acquisition terminals to collect voltage and temperature signals from the connected copper busbars, respectively, to determine the operating status of the battery management system. Using both types of acquisition terminals simultaneously not only occupies space on the surface of the connected copper busbars but also requires separate mounting structures for each acquisition terminal, increasing costs. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack that solves the problem that existing methods use two acquisition terminals to acquire voltage and temperature signals respectively, which results in occupying space on the surface of the connecting copper busbar and increasing costs. Another purpose of this application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of this application includes:

[0005] The box-shaped enclosure has a receiving cavity;

[0006] A single battery cell is disposed in the receiving cavity;

[0007] A connecting conductor is disposed in the receiving cavity and is electrically connected to the battery cell;

[0008] A data acquisition terminal is disposed in the receiving cavity and is electrically connected to the connecting conductor;

[0009] The acquisition terminal includes:

[0010] The conductive part is electrically connected to the connecting conductor;

[0011] A circuit board is disposed on the side of the conductive portion away from the connecting conductor and is electrically connected to the conductive portion;

[0012] The voltage acquisition harness is electrically connected to the circuit board and the conductive part, respectively.

[0013] Multiple temperature acquisition cables are electrically connected to the circuit board;

[0014] The temperature acquisition unit is electrically connected to the circuit board and the temperature acquisition wiring harness, respectively.

[0015] In some embodiments, the temperature acquisition unit is disposed on the side of the circuit board away from the conductive part and is conductively connected to the circuit board.

[0016] In some embodiments, the circuit board includes:

[0017] plate body;

[0018] Multiple first pads are disposed on the outer periphery of the board and are electrically connected to the conductive portion;

[0019] The second pad is disposed on the side of the board away from the conductive part, and is conductively connected to the first pad and the voltage acquisition harness respectively.

[0020] Multiple third pads are disposed on the side of the board away from the conductive part, and are all electrically connected to the temperature acquisition unit;

[0021] Multiple fourth pads are disposed on the side of the board away from the conductive part, and each fourth pad is electrically connected to a third pad and a temperature acquisition wire harness.

[0022] In some embodiments,

[0023] The plate has a clearance hole that penetrates the plate along the arrangement direction of the connecting conductor and the conductive part, and the portion of the temperature acquisition unit projected onto the plate is located inside the clearance hole.

[0024] The acquisition terminal also includes a thermally conductive adhesive layer, which is disposed inside the clearance hole and connected to the conductive part and the temperature acquisition unit respectively.

[0025] In some embodiments,

[0026] The conductive part has a first mounting hole, which penetrates the conductive part.

[0027] The connecting conductor has a second mounting hole that penetrates the connecting conductor;

[0028] The battery pack also includes a locking member, which passes through the first mounting hole and the second mounting hole and is electrically connected to the conductive part and the connecting conductor, respectively.

[0029] In some embodiments, the circuit board is disposed on one side of the first mounting hole, and the voltage acquisition harness and the temperature acquisition harness are disposed on the side of the circuit board away from the first mounting hole.

[0030] In some embodiments, the clearance hole is disposed on the side of the plate near the first mounting hole, and the clearance hole extends through the side of the plate near the first mounting hole.

[0031] In some embodiments, the conductive portion includes:

[0032] The body has the first mounting hole, which penetrates the body, and the body is electrically connected to the connecting conductor and the circuit board respectively.

[0033] An anti-rotation element is connected to the side of the body facing the connecting conductor and is disposed adjacent to the connecting conductor.

[0034] In some embodiments, the body and the anti-rotation member are integrally connected.

[0035] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0036] Beneficial Effects: Compared with the prior art, a battery pack according to an embodiment of this application includes a housing, battery cells, connecting conductors, and acquisition terminals. The housing has a receiving cavity, in which the battery cells are disposed. The connecting conductors are disposed in the receiving cavity and electrically connected to the battery cells. The acquisition terminals are disposed in the receiving cavity and electrically connected to the connecting conductors. The acquisition terminals include a conductive part, a circuit board, voltage acquisition harnesses, multiple temperature acquisition harnesses, and a temperature acquisition unit. The conductive part is electrically connected to the connecting conductors. The circuit board is disposed on the side of the conductive part away from the connecting conductors and is electrically connected to the conductive part. The voltage acquisition harnesses are electrically connected to both the circuit board and the conductive part. The multiple temperature acquisition harnesses are all electrically connected to the circuit board. The temperature acquisition unit is electrically connected to both the circuit board and the temperature acquisition harnesses. This application achieves simultaneous acquisition of voltage and temperature signals by setting a data acquisition terminal and a connecting conductor for conductive connection. The conductive part of the data acquisition terminal and the connecting conductor can transmit voltage and temperature signals simultaneously. By using a circuit board to connect the voltage acquisition harness, temperature acquisition harness and temperature acquisition unit, the acquisition of voltage and temperature signals is integrated into one data acquisition terminal. Compared with two terminals for acquiring temperature and voltage signals separately, this directly reduces one data acquisition terminal, reduces material and assembly costs, reduces the space occupied on the surface of the connecting conductor, reduces the space occupied in assembly, and improves assembly efficiency.

[0037] 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 of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0038] 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.

[0039] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of this application;

[0040] Figure 2 This is a side view of a battery pack according to an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the overall structure of a data acquisition terminal according to an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the structure of a circuit board according to an embodiment of this application;

[0043] Figure 5 This is a partial structural diagram of a connecting conductor according to an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the structure of a data acquisition terminal and a connecting conductor according to an embodiment of this application.

[0045] Reference numerals: 100, housing; 110, receiving cavity; 200, battery cell; 300, connecting conductor; 310, second mounting hole; 400, acquisition terminal; 410, conductive part; 411, first mounting hole; 412, body; 413, anti-rotation component; 420, circuit board; 421, board body; 4211, clearance hole; 422, first pad; 423, second pad; 424, third pad; 425, fourth pad; 430, voltage acquisition harness; 440, temperature acquisition harness; 450, temperature acquisition unit; 460, thermally conductive adhesive layer; 500, locking component. Detailed Implementation

[0046] 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.

[0047] 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 85° to 95° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of 5° is considered parallel.

[0048] In automotive components such as power battery packs or power distribution boxes, it is often necessary to collect voltage and temperature signals from the internal electrical connection copper bars (connecting conductors). Currently, the common solution is to use separate voltage and temperature signal acquisition terminals (including temperature sensors) fixed to the copper bars, and then connect these two sets of terminals to the control module to collect the voltage and temperature signals. This application requires two sets of acquisition terminals, which not only occupies space on the copper bar surface but also necessitates separate fixing structures and corresponding assemblies for each terminal, increasing costs.

[0049] In view of this, embodiments of this application provide a battery pack and an electrical device, which aim to solve the above-mentioned technical problems.

[0050] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 6This application provides a battery pack, including a housing 100, battery cells 200, connecting conductors 300, and data acquisition terminals 400. The housing 100 has a receiving cavity 110, in which the battery cells 200 are disposed. The connecting conductors 300 are disposed in the receiving cavity 110 and electrically connected to the battery cells 200. The data acquisition terminals 400 are disposed in the receiving cavity 110 and electrically connected to the connecting conductors 300. The data acquisition terminals 400 include a conductive part 410, a circuit board 420, and a voltage acquisition harness 43. 0. Multiple temperature acquisition wire harnesses 440 and temperature acquisition unit 450, conductive part 410 is conductively connected to connecting conductor 300, circuit board 420 is disposed on the side of conductive part 410 away from connecting conductor 300 and is conductively connected to conductive part 410, voltage acquisition wire harness 430 is conductively connected to circuit board 420 and conductive part 410 respectively, multiple temperature acquisition wire harnesses 440 are all conductively connected to circuit board 420, and temperature acquisition unit 450 is conductively connected to circuit board 420 and temperature acquisition wire harness 440 respectively.

[0051] This application achieves simultaneous acquisition of voltage and temperature signals by setting a data acquisition terminal 400 and a connecting conductor 300 for conductive connection. The data acquisition terminal 400, with its conductive part 410 and the connecting conductor 300, can transmit voltage and temperature signals simultaneously. A circuit board 420 is used to connect the voltage acquisition harness 430, the temperature acquisition harness 440, and the temperature acquisition unit 450, integrating the acquisition of voltage and temperature signals into a single data acquisition terminal 400. Compared to acquiring temperature and voltage signals separately at two terminals, this directly reduces the number of data acquisition terminals 400, lowering material and assembly costs. It also reduces the space occupied on the surface of the connecting conductor 300, thus reducing assembly space and improving assembly efficiency.

[0052] Specifically, the connecting conductor 300 can be a connecting copper busbar, used to achieve conductive connection between the battery cell 200 and electrical components or between electrical components. The acquisition terminal 400 is conductively connected to the connecting conductor 300, allowing direct acquisition of the voltage signal on the connecting conductor 300. The acquisition terminal 400 is equipped with a temperature acquisition unit 450, which can transfer temperature to the temperature acquisition unit 450 through heat transfer, thereby realizing the temperature signal on the connecting conductor 300. The circuit board 420 is connected to the conductive part 410, the voltage acquisition harness 430, multiple temperature acquisition harnesses 440, and the temperature acquisition unit 450, respectively. The internal circuitry of the circuit board 420 enables conductive connection between the conductive part 410 and the voltage acquisition harness 430, and conductive connection between the multiple temperature acquisition harnesses 440 and the temperature acquisition unit 450. This allows the voltage signal on the conductive part 410 and the temperature signal acquired by the temperature acquisition unit 450 to be transmitted to the control module within the battery pack, thus simultaneously acquiring both voltage and temperature signals on the connecting conductor 300. This solution requires only one conductive part 410 to connect to the connecting conductor 300, which not only reduces the space occupied on the surface of the connecting conductor 300 and facilitates circuit layout, but also reduces the use of installation materials and acquisition terminals 400, effectively reducing material costs. In other embodiments, the connecting conductor 300 can also be a connecting aluminum busbar.

[0053] like Figure 3 As shown, in some embodiments, the temperature acquisition unit 450 is disposed on the side of the circuit board 420 away from the conductive part 410 and is electrically connected to the circuit board 420.

[0054] In this embodiment, by setting the temperature acquisition unit 450 to the side of the circuit board 420 away from the conductive part 410, it is easier for the circuit board 420 to contact and conduct electricity with the conductive part 410, which is beneficial to the assembly of the acquisition terminal 400, thereby reducing the overall space occupied by the acquisition terminal 400.

[0055] Please refer to the following: Figure 3 and Figure 4In some embodiments, the circuit board 420 includes a board body 421, a plurality of first pads 422, second pads 423, a plurality of third pads 424, and a plurality of fourth pads 425. The plurality of first pads 422 are disposed on the outer periphery of the board body 421 and are conductively connected to the conductive part 410. The second pads 423 are disposed on the side of the board body 421 away from the conductive part 410 and are conductively connected to the first pads 422 and the voltage acquisition harness 430, respectively. The plurality of third pads 424 are disposed on the side of the board body 421 away from the conductive part 410 and are all conductively connected to the temperature acquisition unit 450. The plurality of fourth pads 425 are disposed on the side of the board body 421 away from the conductive part 410, and each fourth pad 425 is conductively connected to one third pad 424 and one temperature acquisition harness 440, respectively.

[0056] In this embodiment, by setting multiple pads, it is easy to directly solder the conductive part 410, voltage acquisition harness 430, temperature acquisition harness 440 and temperature acquisition unit 450 to the circuit board 420. This not only ensures conductivity but also facilitates the assembly of the acquisition terminal 400. At the same time, by setting the circuit inside the circuit board 420 to connect with each pad, external wiring can be reduced and the stability of the conductive connection can be maintained.

[0057] Please refer to the following: Figure 3 and Figure 4 In some embodiments, the plate 421 has a clearance hole 4211, which extends through the plate 421 along the arrangement direction of the connecting conductor 300 and the conductive part 410. The portion of the temperature acquisition unit 450 projected onto the plate 421 is located inside the clearance hole 4211. The acquisition terminal 400 also includes a thermally conductive adhesive layer 460, which is disposed inside the clearance hole 4211 and connected to the conductive part 410 and the temperature acquisition unit 450, respectively.

[0058] In this embodiment, by providing a clearance hole 4211 and utilizing a thermally conductive adhesive layer 460, the temperature on the conductive part 410 can be transferred to the temperature acquisition unit 450 more efficiently. At this time, the heat from the conductive part 410 is simultaneously transferred to the temperature acquisition unit 450 via the thermally conductive adhesive layer 460 and the circuit board 420, further improving the accuracy of temperature acquisition. The thermally conductive adhesive layer 460 can be thermally conductive silicone.

[0059] Please combine Figure 3 , Figure 5 and Figure 6In some embodiments, the conductive part 410 has a first mounting hole 411 through which the conductive part 410 passes; the connecting conductor 300 has a second mounting hole 310 through which the connecting conductor 300 passes; the battery pack also includes a locking member 500, which passes through the first mounting hole 411 and the second mounting hole 310, and is electrically connected to the conductive part 410 and the connecting conductor 300 respectively.

[0060] In this embodiment, by providing a first mounting hole 411 and a second mounting hole 310, the locking member 500 can pass through simultaneously, locking the conductive part 410 and the connecting conductor 300 together and making a conductive connection, ensuring connection stability and conductivity. Meanwhile, the locking member 500 can be a conductive bolt or the like, and can be disassembled, facilitating the connection and disconnection of the sampling terminal 400 and the connecting conductor 300, and making it easy to change the sampling position of the sampling terminal.

[0061] like Figure 3 As shown, in some embodiments, the circuit board 420 is disposed on one side of the first mounting hole 411, and the voltage acquisition harness 430 and temperature acquisition harness 440 are disposed on the side of the circuit board 420 away from the first mounting hole 411.

[0062] In this embodiment, the voltage acquisition harness 430 and the temperature acquisition harness 440 are disposed on the side of the circuit board 420 away from the first mounting hole 411. This avoids the voltage acquisition harness 430 and the temperature acquisition harness 440 from extending and obstructing or interfering with the first mounting hole 411, ensuring the accuracy of signal acquisition and keeping the wiring inside the battery pack neat.

[0063] like Figure 3 As shown, in some embodiments, the clearance hole 4211 is provided on the side of the plate 421 near the first mounting hole 411, and the clearance hole 4211 penetrates the side of the plate 421 near the first mounting hole 411.

[0064] In this embodiment, by setting the clearance hole 4211 to be located on the side of the plate 421 close to the first mounting hole 411, the corresponding temperature acquisition unit 450 is also located on the side close to the first mounting hole 411. At this time, the temperature acquisition unit 450 is closer to the locking member 500 and the connecting conductor 300, and can more accurately acquire the temperature information of the connecting conductor 300.

[0065] like Figure 3 As shown, in some embodiments, the conductive part 410 includes a body 412 and an anti-rotation member 413. The body 412 has a first mounting hole 411 that penetrates the body 412. The body 412 is electrically connected to the connecting conductor 300 and the circuit board 420 respectively. The anti-rotation member 413 is connected to the side of the body 412 facing the connecting conductor 300 and is disposed adjacent to the connecting conductor 300.

[0066] In this embodiment, the body 412 is used to electrically connect with the connecting conductor 300, and the anti-rotation member 413 is used to abut against the connecting conductor 300 when the locking member 500 rotates to lock the connecting conductor 300 and the body 412, so as to prevent the acquisition terminal 400 from rotating and facilitate the smooth assembly and connection of the connecting conductor 300 and the acquisition terminal 400.

[0067] In some embodiments, the body 412 and the anti-rotation member 413 are integrally connected.

[0068] In this embodiment, the integrally connected body 412 and anti-rotation member 413 can ensure the connection strength between the anti-rotation member 413 and the body 412, guarantee the structural stability, and play a good limiting effect when the locking member 500 is locked, reducing the possibility of breakage at the connection between the anti-rotation member 413 and the body 412.

[0069] Preferably, the anti-rotation component 413 and the body 412 can be formed by directly bending a single sheet metal part.

[0070] Accordingly, embodiments of this application also provide an electrical device, including a battery pack as described in any of the foregoing embodiments.

[0071] It is understood that the electrical device of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here.

[0072] 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.

[0073] 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.

[0074] 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, include: The box-shaped enclosure has a receiving cavity; A single battery cell is disposed in the receiving cavity; A connecting conductor is disposed in the receiving cavity and is electrically connected to the battery cell; A data acquisition terminal is disposed in the receiving cavity and is electrically connected to the connecting conductor; The acquisition terminal includes: The conductive part is electrically connected to the connecting conductor; A circuit board is disposed on the side of the conductive portion away from the connecting conductor and is electrically connected to the conductive portion; The voltage acquisition harness is electrically connected to the circuit board and the conductive part, respectively. Multiple temperature acquisition cables are electrically connected to the circuit board; The temperature acquisition unit is electrically connected to the circuit board and the temperature acquisition wiring harness, respectively.

2. The battery pack according to claim 1, characterized in that, The temperature acquisition unit is located on the side of the circuit board away from the conductive part and is electrically connected to the circuit board.

3. The battery pack according to claim 2, characterized in that, The circuit board includes: plate body; Multiple first pads are disposed on the outer periphery of the board and are electrically connected to the conductive portion; The second pad is disposed on the side of the board away from the conductive part, and is conductively connected to the first pad and the voltage acquisition harness respectively. Multiple third pads are disposed on the side of the board away from the conductive part, and are all electrically connected to the temperature acquisition unit; Multiple fourth pads are disposed on the side of the board away from the conductive part, and each fourth pad is electrically connected to a third pad and a temperature acquisition wire harness.

4. The battery pack according to claim 3, characterized in that, The plate has a clearance hole that penetrates the plate along the arrangement direction of the connecting conductor and the conductive part, and the portion of the temperature acquisition unit projected onto the plate is located inside the clearance hole. The acquisition terminal also includes a thermally conductive adhesive layer, which is disposed inside the clearance hole and connected to the conductive part and the temperature acquisition unit respectively.

5. The battery pack according to claim 4, characterized in that, The conductive part has a first mounting hole, which penetrates the conductive part. The connecting conductor has a second mounting hole that penetrates the connecting conductor; The battery pack also includes a locking member, which passes through the first mounting hole and the second mounting hole and is electrically connected to the conductive part and the connecting conductor, respectively.

6. The battery pack according to claim 5, characterized in that, The circuit board is disposed on one side of the first mounting hole, and the voltage acquisition harness and the temperature acquisition harness are disposed on the side of the circuit board away from the first mounting hole.

7. The battery pack according to claim 5, characterized in that, The clearance hole is located on the side of the plate near the first mounting hole, and the clearance hole extends through the side of the plate near the first mounting hole.

8. The battery pack according to claim 5, characterized in that, The conductive part includes: The body has the first mounting hole, which penetrates the body, and the body is electrically connected to the connecting conductor and the circuit board respectively. An anti-rotation element is connected to the side of the body facing the connecting conductor and is disposed adjacent to the connecting conductor.

9. The battery pack according to claim 8, characterized in that, The main body and the anti-rotation component are integrally connected.

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

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