Battery module, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery module, a battery pack and electric equipment, and relates to the technical field of automobile parts. The battery module comprises a plurality of battery cells; each electric connecting piece comprises a first connecting part and a second connecting part, and the first connecting part is electrically connected with the positive electrode of the battery cell; the second connecting part is electrically connected with the shell of the battery cell; and the fusing part is connected between the first connecting part and the second connecting part, so that the shell is positively charged, and the fusing part is used for fusing during short circuit. According to the battery module, the battery pack and the electric equipment, the phenomenon of thermal runaway of the battery pack caused by short circuit can be reduced.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a battery module, battery pack and electrical equipment. Background Technology

[0002] The battery pack is the core component of an electric vehicle, mainly used to store electrical energy and provide power to the motor; the battery pack includes multiple cells, which are connected in series or parallel.

[0003] The battery pack of the related technology is equipped with a flexible circuit board, which is a thin and flexible circuit board. The flexible circuit board is connected to the positive and negative terminals of the battery cell to form a current path. The battery cells are connected in series or in parallel through the flexible circuit board to output the required voltage and current.

[0004] However, if there is circuit damage, foreign object residue, or poor soldering during the manufacturing process of the flexible circuit board, it may cause a short circuit during use. The short circuit will cause the cell temperature to rise, which in turn will lead to thermal runaway of the battery pack. Utility Model Content

[0005] This application provides a battery module, a battery pack, and an electrical device to solve the technical problem in the related art where short circuits in flexible circuit boards cause thermal runaway in battery packs during use.

[0006] In a first aspect, embodiments of this application provide a battery module, including:

[0007] Multiple battery cells;

[0008] Multiple electrical connectors, each of which includes:

[0009] The first connecting part is electrically connected to the positive electrode of the battery cell;

[0010] The second connecting part is electrically connected to the housing of the battery cell;

[0011] A fuse is connected between the first connection and the second connection to make the housing positively charged, and the fuse is used to melt in the event of a short circuit.

[0012] In some embodiments, the widths of both the first connecting portion and the second connecting portion are greater than the width of the fused portion.

[0013] In some embodiments, the width of the fused portion is less than 0.2 mm.

[0014] In some embodiments, a protective element is also included, wherein the protective element is provided on both opposite sides of each of the electrical connectors, and the fusible portion, at least a portion of the first connection portion and at least a portion of the second connection portion are disposed between the two protective elements.

[0015] In some embodiments, the protective element is an insulating element.

[0016] In some embodiments, the plurality of battery cells are battery cell groups, and multiple battery cell groups are provided, with the plurality of battery cells in adjacent battery cell groups being arranged alternately.

[0017] In some embodiments, the system further includes a bracket, with the brackets disposed on both sides of the plurality of battery cell groups, and the battery cells connected between the brackets on both sides.

[0018] In some embodiments, an electrical connecting piece is also included, with multiple electrical connecting pieces provided on the side of the brackets on both sides away from the battery cell, and the multiple electrical connecting pieces are used to connect multiple battery cells of multiple battery cell groups in series or in parallel.

[0019] In some embodiments, the cells of adjacent cell groups are oriented in opposite directions, one end of the electrical connector is electrically connected to the positive electrode of one group of cells in an adjacent cell group, the other end of the electrical connector is electrically connected to the negative electrode of another group of cells in an adjacent cell group, and the first connection portion is electrically connected to the electrical connector.

[0020] In some embodiments, a data acquisition unit is further included, which is used to acquire the voltage of the plurality of said cells.

[0021] In some embodiments, the acquisition device is disposed on one side of the plurality of battery cells, and the plurality of electrical connectors are disposed on the other side of the plurality of battery cells.

[0022] In some embodiments, the acquisition device includes a circuit board and a plurality of voltage acquisition units, all of which are disposed on the circuit board and are used to acquire the voltage of the battery cell.

[0023] In some embodiments, the acquisition device further includes at least one temperature acquisition unit disposed on the circuit board, the temperature acquisition unit being used to acquire the temperature of the corresponding battery cell.

[0024] In some embodiments, a connecting member is also included. Multiple acquisition members are provided, and the connecting member is provided between adjacent acquisition members. The connecting member is used to electrically connect adjacent acquisition members.

[0025] In some embodiments, two protective covers are also included, with the plurality of battery cells and the plurality of electrical connectors disposed between the two protective covers.

[0026] Secondly, embodiments of this application provide a battery pack, including a frame and a battery module disposed within the frame.

[0027] Thirdly, embodiments of this application provide an electrical device, including a device body and a battery pack disposed on the device body.

[0028] This application provides a battery module, a battery pack, and an electrical device. The battery module provided by this application, by employing a fuse, can disconnect the electrical connection between the first and second connecting parts when a short circuit occurs in the electrical connector or the battery cell. This prevents the battery cell casing from becoming charged, thus preventing thermal runaway of the battery pack caused by a short circuit in the electrical connector and indirectly improving the safety of the battery pack during use. By employing the first and second connecting parts, the battery cell casing can be positively charged, avoiding a direct short circuit between the casing and the negative electrode and reducing the risk of short circuits between the casing and external conductive materials. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] Figure 1 This is a schematic diagram of the battery module provided in this application;

[0031] Figure 2 This is an exploded structural diagram of the battery module provided in this application;

[0032] Figure 3 This is a structural schematic diagram of the electrical connector of the battery module provided in this application;

[0033] Figure 4 A schematic diagram of the electrical connectors, brackets, and electrical connectors of the battery module provided in this application;

[0034] Figure 5 for Figure 4 Partial structural diagram;

[0035] Figure 6 A schematic diagram of the structure of the battery module bracket, electrical connection piece, and acquisition component provided in this application;

[0036] Figure 7 for Figure 6 A partial structural diagram.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Battery cells;

[0039] 200. Electrical connector; 210. First connecting part; 220. Second connecting part; 230. Fusible part;

[0040] 300. Protective components;

[0041] 400, bracket; 410, opening; 420, buckle;

[0042] 500. Electrical connector;

[0043] 600. Data acquisition unit; 610. Circuit board; 611. Connecting hole; 620. Voltage acquisition unit; 630. Temperature acquisition unit;

[0044] 700. Connecting component; 710. Connecting wire; 720. Plug; 730. Socket;

[0045] 800. Protective cover.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0048] The battery pack of the related technology is equipped with a flexible circuit board, which is a thin and flexible circuit board. The flexible circuit board is connected to the positive and negative terminals of the battery cell to form a current path. The battery cells are connected in series or in parallel through the flexible circuit board to output the required voltage and current.

[0049] However, during the manufacturing process of flexible circuit boards, issues such as circuit damage, foreign object residue, or poor soldering can lead to short circuits during use. A short circuit causes a sharp increase in current within the battery cell, resulting in a rapid rise in cell temperature. When the temperature exceeds the thermal stability threshold of the cell material, thermal runaway of the battery pack may occur. Once thermal runaway occurs, it further exacerbates the temperature rise of the cell, potentially leading to serious consequences such as battery pack fire or explosion, thus threatening the safety of equipment and users.

[0050] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0051] Combination Figures 1 to 3 This application provides a battery module, including:

[0052] Multiple battery cells 100;

[0053] Multiple electrical connectors 200, each electrical connector 200 including:

[0054] The first connecting part 210 is electrically connected to the positive electrode of the battery cell 100;

[0055] The second connecting part 220 is electrically connected to the housing of the battery cell 100;

[0056] The fuse 230 is connected between the first connection 210 and the second connection 220 to make the housing positively charged. The fuse 230 is used to melt and break the circuit in the event of a short circuit.

[0057] In this embodiment, the battery cell 100 is a cylindrical battery cell, and the first connecting portion 210 and the second connecting portion 220 are both flexible circuit boards with the same width. In other embodiments, the electrical connector 200 can also be a regular circuit board, and the widths of the first connecting portion 210 and the second connecting portion 220 can be adjusted as needed, for example, the width of the first connecting portion 210 can be greater than or less than the width of the second connecting portion 220.

[0058] In this application, by employing the fusible link 230, when a short circuit occurs in the electrical connector 200 or the battery cell 100, the fusible link 230, connected between the first connection portion 210 and the second connection portion 220, can disconnect the electrical connection between the first connection portion 210 and the second connection portion 220 after melting. This prevents the battery cell 100 casing from becoming charged, thus preventing thermal runaway of the battery pack caused by a short circuit in the electrical connector 200, indirectly improving the safety of the battery pack during use. By employing the first connection portion 210 and the second connection portion 220, the casing of the battery cell 100 becomes positively charged, which avoids a direct short circuit between the casing and the negative electrode and reduces the risk of a short circuit between the casing and external conductive materials, because positive charges attract negative charges, thereby reducing the possibility of external short circuits and further improving the safety of the battery cell 100 during use.

[0059] Combination Figures 1 to 3The widths of the first connecting portion 210 and the second connecting portion 220 are both greater than the width of the fused portion 230.

[0060] Combination Figures 1 to 3 The width of the fused portion 230 is less than 0.2 mm.

[0061] In this embodiment, the fuse 230 is integrally formed with the first connecting part 210 and the second connecting part 220, and the fuse 230 is also configured as a flexible circuit board; in other embodiments, the fuse 230 can be replaced with an electronic switch. By using an electronic switch in conjunction with an electronic circuit, the electronic circuit can detect abnormal current or temperature and cut off the circuit through the electronic switch when a threshold is reached.

[0062] In this application, by making the width of the fuse portion 230 less than 0.2 mm and smaller than the width of the first connecting portion 210 and the second connecting portion 220, the fuse portion 230, the first connecting portion 210 and the second connecting portion 220 can be integrated for production without complex processes or additional materials, significantly reducing costs. By making the fuse portion 230 narrower, it has the characteristic of fast response, which can quickly heat up and melt during overcurrent, promptly cutting off the circuit and preventing thermal runaway of the battery pack caused by short circuit. The fuse portion 230 occupies little space and can be flexibly embedded in a compact circuit layout. At the same time, by precisely controlling the width, a stable and consistent fusing threshold can be achieved to adapt to the needs of different application scenarios, further improving the safety of the electrical connector 200 during use and effectively preventing thermal runaway caused by short circuit.

[0063] Combination Figures 1 to 3 The battery module also includes a protective element 300. Each electrical connector 200 has a protective element 300 on both sides opposite to it. The fuse part 230, at least a portion of the first connecting part 210, and at least a portion of the second connecting part 220 are disposed between the two protective elements 300.

[0064] In this embodiment, a portion of the first connecting portion 210 and a portion of the second connecting portion 220 are disposed between the two protective members 300, and the entire fusible portion 230 is disposed between the two protective members 300. The first connecting portion 210, the fusible portion 230 and the second connecting portion 220 are arranged in an arc shape. In other embodiments, the entire first connecting portion 210, the fusible portion 230 and the second connecting portion 220 may also be disposed between the two protective members 300.

[0065] In this application, by adopting the protective component 300, the protective component 300 can protect the fuse part 230 and the connection position between the fuse part 230 and the first connection part 210 and the second connection part 220, preventing the electrical connector 200 from causing mechanical damage to the fuse part 230, the first connection part 210 and the second connection part 220 during transportation and installation, thereby indirectly improving the safety of the fuse part 230, the first connection part 210 and the second connection part 220 in use, and thus indirectly extending the service life of the first connection part 210, the fuse part 230 and the second connection part 220.

[0066] Combination Figures 1 to 3 The protective component 300 is an insulating component.

[0067] In this embodiment, the insulating component is an insulating film. The widths of the first connecting portion 210 and the second connecting portion 220 are both smaller than the width of the insulating component. The insulating films on both sides of the fused portion 230 are fixed together by adhesive to cover the fused portion 230. In other embodiments, the fused portion 230 can also be made of plastic or rubber. The insulating components on both sides can also be fixed by bolt connection or heat fusion.

[0068] In this application, by employing an insulating film, the insulating film can provide efficient electrical isolation, preventing the fuse part 230 from accidentally contacting surrounding conductive parts during operation, thereby avoiding short circuits and secondary faults and significantly improving safety. Secondly, the insulating film has good thermal barrier properties, which can effectively reduce the spread of heat generated during the melting process to the surrounding circuit, prevent local overheating from damaging sensitive components, and avoid thermal runaway caused by heat accumulation. In addition, the insulating film can also block the diffusion of conductive materials generated during melting, preventing contamination of other circuit parts and ensuring long-term stable operation of the circuit.

[0069] like Figure 1 As shown, multiple battery cells 100 form a battery cell group, and multiple battery cell groups are set up. The multiple battery cells 100 in adjacent battery cell groups are arranged alternately.

[0070] In this embodiment, two sets of battery cells are arranged from top to bottom. One set of battery cells includes 17 cells 100, which together form 16 storage spaces. The other set of battery cells includes 16 cells 100, which are arranged one-to-one within the 16 storage spaces. In other embodiments, the number of battery cells 100 in each set can be adjusted as needed.

[0071] In this application, by staggering the cells 100 of the two sets of cells 100, this layout significantly improves the energy density of the battery pack through compact space utilization, enabling more cells 100 to be accommodated in the same volume, thereby increasing the total energy capacity. Secondly, the staggered arrangement optimizes heat dissipation efficiency. The gaps between the cells 100 provide a good flow channel for the cooling medium, allowing heat to be dissipated more evenly, effectively reducing the risk of local overheating, and thus reducing the possibility of thermal runaway and improving the safety of the battery pack. In addition, the close arrangement of the cells 100 enhances mechanical stability, reduces the impact of vibration and impact on the cells 100, and reduces the risk of damage to the cells 100. At the same time, this design simplifies electrical connections, shortens the distance between adjacent cells 100, thereby shortening the electrical connection distance between adjacent cells 100, reducing connection resistance and energy loss, and improving connection reliability.

[0072] Combination Figure 2 , Figure 4 and Figure 5 The battery module also includes a bracket 400. The bracket 400 is provided on both sides of the multiple battery cell groups, and the battery cell 100 is connected between the two brackets 400.

[0073] In this embodiment, openings 410 are provided on both sides of the bracket 400 at the positions where the battery cell 100 is located. The openings 410 are used to accommodate the positive and negative terminals at the ends of the battery cell 100. The battery cell 100 can be fixed to the bracket 400 by means of bolt connection, snap connection or structural adhesive bonding.

[0074] In this application, by adopting the bracket 400, the bracket 400 can provide stable mechanical support, ensuring that the battery cell 100 remains in a fixed position under complex working conditions such as vibration and impact, reducing mutual collisions between the battery cells 100, thereby extending the service life of the battery cell 100 and improving the reliability of the battery pack; the presence of the bracket 400 facilitates the installation and disassembly of the battery cell 100, simplifies the assembly and maintenance process of the battery pack, and reduces production costs and maintenance difficulty.

[0075] Combination Figure 2 , Figure 4 and Figure 5 The battery module also includes electrical connectors 500. Multiple electrical connectors 500 are provided on the side of the two side brackets 400 away from the battery cell 100. The multiple electrical connectors 500 are used to connect multiple battery cells 100 of multiple battery cell groups in series or in parallel.

[0076] In this embodiment, multiple electrical connecting pieces 500 are used to connect multiple battery cells 100 of multiple battery cell groups in series. The electrical connecting pieces 500 are aluminum or copper sheets. Multiple buckles 420 are provided on the opposing surfaces of the two side brackets 400 along the circumference of each electrical connecting piece 500. When the electrical connecting piece 500 is placed on the bracket 400, the multiple buckles 420 can engage with the electrical connecting piece 500, thereby fixing the electrical connecting piece 500 on the bracket 400.

[0077] This application, by employing the electrical connector 500, achieves a series connection that effectively increases the total voltage of the battery pack, thereby meeting the demands for higher power output and satisfying the needs of electric vehicles and high-performance electronic devices. The use of the connector eliminates the need for wiring harnesses, simplifying the electrical connection between the cells 100, reducing connection resistance, minimizing energy loss, and improving the overall efficiency of the battery pack. The connector can also, to a certain extent, fix the cells 100, enhancing the structural stability of the battery pack and reducing the displacement of the cells 100 under vibration or impact, thereby improving the reliability and safety of the battery pack.

[0078] Combination Figure 2 , Figure 4 and Figure 5 The cells 100 of adjacent cell groups are oriented in opposite directions. One end of the electrical connecting piece 500 is electrically connected to the positive electrode of one of the cells 100 in the adjacent cell group, and the other end of the electrical connecting piece 500 is electrically connected to the negative electrode of another cell 100 in the adjacent cell group. The first connecting part 210 is electrically connected to the electrical connecting piece 500.

[0079] In this application, by having the multiple cells 100 of the upper cell group and the multiple cells 100 of the lower cell group face opposite directions, the positive and negative terminals of the upper and lower cells 100, as well as the negative and positive terminals of the upper and lower cells 100, can be located on the same side. This shortens the series connection distance between the upper and lower cells 100, thus facilitating the connection of the electrical connector 500 to the multiple cells 100 in series on the same side. This design eliminates the need for the electrical connector 500 to bypass the entire cell 100 and connect to the positive and negative terminals of adjacent cells 100, and also eliminates the need for long and complex wiring harnesses to connect multiple cells 100 in series. By electrically connecting the first connection portion 210 to the electrical connector 500, the first connection portion 210 does not need to be connected to the positive terminal of the cell 100, thus allowing the casing of the cell 100 to carry a positive charge and preventing the electrical connector 500 from affecting the connection between the first connection portion 210 and the positive terminal of the cell 100.

[0080] Combination Figure 2 , Figure 6 and Figure 7 The battery module also includes a data acquisition unit 600, which is used to acquire the voltage of multiple battery cells 100.

[0081] In this application, by adopting the configuration of the data acquisition unit 600, firstly, the data acquisition unit 600 can accurately monitor the voltage of each cell 100, ensuring that all cells 100 remain within a safe voltage range during charging and discharging, thereby extending the service life of the cells 100 and improving the overall performance of the battery pack; secondly, the data acquisition unit 600 can detect the health status of the cells 100 in real time, promptly detect abnormal cells 100, such as overcharging, over-discharging, or short circuits, thereby triggering protection mechanisms to prevent dangerous situations such as thermal runaway, significantly improving the safety of the battery pack.

[0082] like Figure 2 As shown, the data acquisition unit 600 is located on one side of the multiple battery cells 100, and the multiple electrical connectors 200 are located on the other side of the multiple battery cells 100.

[0083] In this embodiment, multiple electrical connectors 200 are disposed on one side of one bracket 400 away from the battery cell 100, and the acquisition unit 600 is disposed on the other side of the bracket 400 away from the battery cell 100.

[0084] In this application, by placing the acquisition unit 600 on one side of the multiple battery cells 100, it is not necessary to simultaneously place the acquisition unit 600 on both sides of the multiple battery cells 100 to acquire voltage from the multiple battery cells 100, thereby reducing the number of acquisition units 600 used, simplifying the wiring when the acquisition unit 600 acquires voltage from the multiple battery cells 100, and reducing the risk of failure due to poor contact or short circuit; by placing the multiple electrical connectors 200 on the other side of the battery cells 100, it is not necessary to simultaneously place the multiple electrical connectors 200 on both sides of the multiple battery cells 100 to make the casing of the battery cells 100 positively charged, thereby simplifying the wiring when the electrical connectors 200 electrically connect to the multiple battery cells 100, and further reducing the risk of failure due to poor contact or short circuit.

[0085] Combination Figure 2 , Figure 6 and Figure 7 The acquisition unit 600 includes a circuit board 610 and multiple voltage acquisition units 620. The multiple voltage acquisition units 620 are all disposed on the circuit board 610. The voltage acquisition units 620 are used to acquire the voltage of the corresponding battery cell 100.

[0086] In this embodiment, the voltage acquisition unit 620 is a nickel sheet, and multiple nickel sheets are arranged one-to-one with multiple battery cells 100. Multiple corresponding connection holes 611 are provided on the circuit board 610 and the bracket 400. The nickel sheets are arranged on the side of the circuit board 610 away from the bracket 400, and some nickel sheets extend into the connection holes 611 to be electrically connected to the battery cells 100. For the battery cells 100 with the positive electrode facing the circuit board 610, the nickel sheets are welded to the connecting piece connected to the positive electrode of the battery cells 100. For the battery cells 100 with the negative electrode facing the circuit board 610, the nickel sheets are welded to the shell of the battery cells 100.

[0087] In this application, by employing nickel sheets, which possess excellent conductivity and corrosion resistance, the stability and reliability of voltage acquisition are ensured, maintaining good performance even in harsh environments such as humidity or high temperature. The low resistance of nickel sheets effectively reduces voltage drop, improves acquisition accuracy, and ensures that the acquired voltage data accurately reflects the actual state of the cell 100. The high flexibility and malleability of nickel sheets allow them to adapt to cell 100s of different shapes and sizes, facilitating flexible layout in compact battery modules and simplifying the installation process. The high mechanical strength of nickel sheets ensures the robustness of connections in vibration and impact environments of the battery module, reducing poor contact or open circuit problems caused by mechanical stress.

[0088] Combination Figure 2 , Figure 6 and Figure 7 The acquisition unit 600 also includes at least one temperature acquisition unit 630, which is disposed on the circuit board 610 and is used to acquire the temperature of the battery cell 100.

[0089] In this embodiment, the temperature acquisition unit 630 is an NTC temperature acquisition line, and there are two NTC temperature acquisition lines, which are respectively located at both ends of the circuit board 610.

[0090] In this application, by placing the temperature acquisition unit 630 on the circuit board 610, the temperature acquisition unit 630 can be integrated with the circuit board 610, thereby eliminating the need for additional temperature acquisition components on both sides of the battery cell 100 to acquire the temperature of the battery cell 100, thus further simplifying the wiring harness during temperature acquisition. The use of NTC temperature acquisition cables offers several advantages: firstly, the high temperature coefficient of NTC temperature acquisition cables enables high-precision measurement over a wide temperature range, ensuring the accuracy and reliability of temperature data; secondly, NTC temperature acquisition cables have a fast response speed, enabling real-time monitoring of temperature changes and timely feedback of temperature anomalies, which is particularly important for battery management systems requiring rapid response; furthermore, NTC temperature acquisition cables are small in size and light in weight, suitable for installation in space-constrained equipment, and have low cost, making them suitable for large-scale applications.

[0091] Combination Figure 2 , Figure 6 and Figure 7 The battery module also includes a connecting member 700. Multiple acquisition members 600 are provided, and a connecting member 700 is provided between adjacent acquisition members 600. The connecting member 700 is used to electrically connect adjacent acquisition members 600.

[0092] In this embodiment, two acquisition components 600 are provided, and a connecting component 700 is used to electrically connect the two circuit boards 610. The connecting component 700 includes a connecting wire 710, a plug 720 and a socket 730. Both ends of the connecting wire 710 are provided with plugs 720, and both circuit boards 610 are provided with sockets 730. The plugs 720 are used to plug into or disconnect from the sockets 730 to electrically connect or disconnect the two circuit boards 610.

[0093] In this application, by setting multiple acquisition components 600, the area of ​​the circuit board 610 of a single acquisition component 600 is reduced, which facilitates the mass production of a single circuit board 610 and prevents deformation and damage caused by an excessively large area of ​​the circuit board 610. By using connecting wires 710, plugs 720 and sockets 730, it is easy to electrically connect multiple circuit boards 610, thus eliminating the need for separate wire harnesses for each circuit board 610. This simplifies the wiring harness for electrical connections between adjacent circuit boards 610. Furthermore, the use of plugs 720 and sockets 730 makes installation and disassembly convenient and simple, improving the efficiency of installation and disassembly of electrical connections between adjacent circuit boards 610.

[0094] Combination Figure 1 and Figure 2 The battery module also includes two protective covers 800, and multiple battery cells 100 and multiple electrical connectors 200 are disposed between the two protective covers 800.

[0095] In this embodiment, the bracket 400 is disposed between the multiple battery cells 100 and the protective cover 800. The protective cover 800 and the bracket 400 can be fixed by means of snap-fit, bolt connection or welding.

[0096] In this application, by adopting the protective cover 800, the protective cover 800 can protect the multiple electrical connectors 200, multiple electrical connector pieces 500 and multiple acquisition pieces 600 on both sides, preventing the multiple electrical connectors 200, multiple electrical connector pieces 500 and multiple acquisition pieces 600 from being exposed to the outside and causing short circuits or damage.

[0097] This application also provides a battery pack, including a frame and a battery module of any of the above embodiments disposed within the frame.

[0098] The specific structure of the battery module has been described in detail in the above embodiments, and will not be repeated here.

[0099] This application also provides an electrical device, including a device body and a battery pack of any of the above embodiments disposed on the device body.

[0100] In this embodiment, the electrical device is a car. In other embodiments, the electrical device may also be a mobile phone, computer, electric motorcycle, or electric bicycle, etc.

[0101] The electrical device provided in this application embodiment, by setting up a battery pack, when a short circuit occurs in the electrical connector 200 or the battery cell 100, because the fuse part 230 is connected between the first connection part 210 and the second connection part 220, the fuse part 230 can disconnect the electrical connection between the first connection part 210 and the second connection part 220 after melting, thereby making the casing of the battery cell 100 de-energized, preventing the electrical connector 200 from causing thermal runaway of the battery pack due to a short circuit, and indirectly improving the safety of the battery pack during use; by using multiple electrical connectors 200 and Multiple data acquisition units 600 are respectively disposed on both sides of multiple battery cells 100, eliminating the need to simultaneously install multiple electrical connectors 200 and multiple data acquisition units 600 on both sides of multiple battery cells 100, thereby simplifying wiring and reducing the risk of failure due to poor contact or short circuit. By placing the temperature acquisition unit 630 on the circuit board 610 of the data acquisition unit 600, the temperature acquisition unit 630 and the circuit board 610 are integrated to realize the acquisition of the temperature of the battery cell 100, thereby further simplifying wiring and reducing the risk of failure due to poor contact or short circuit.

[0102] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A battery module, characterized in that, include: Multiple battery cells (100); Multiple electrical connectors (200), each corresponding to a battery cell (100), and each electrical connector (200) includes: A first connecting part (210) is electrically connected to the positive electrode of the battery cell (100); The second connecting part (220) is electrically connected to the housing of the battery cell (100); A fuse (230) is connected between the first connecting part (210) and the second connecting part (220) to make the housing positively charged, and the fuse (230) is used to melt in the event of a short circuit.

2. The battery module according to claim 1, characterized in that, The widths of the first connecting portion (210) and the second connecting portion (220) are both greater than the width of the fused portion (230).

3. The battery module according to claim 1, characterized in that, The width of the fused portion (230) is less than 0.2 mm.

4. The battery module according to claim 1, characterized in that, It also includes protective elements (300), with each of the electrical connectors (200) having a protective element (300) on each of its opposite sides, and the fuse portion (230), at least a portion of the first connection portion (210) and at least a portion of the second connection portion (220) being disposed between the two protective elements (300).

5. The battery module according to claim 4, characterized in that, The protective component (300) is an insulating component.

6. The battery module according to any one of claims 1-5, characterized in that, The multiple battery cells (100) form a battery cell group, and multiple battery cell groups are provided, with the multiple battery cells (100) of adjacent battery cell groups being arranged alternately.

7. The battery module according to claim 6, characterized in that, It also includes brackets (400), with brackets (400) provided on both sides of the plurality of battery cell groups, and the battery cell (100) connected between the brackets (400) on both sides.

8. The battery module according to claim 7, characterized in that, It also includes electrical connectors (500), and multiple electrical connectors (500) are provided on the side of the brackets (400) on both sides away from the battery cell (100). The multiple electrical connectors (500) are used to connect multiple battery cells (100) of multiple battery cell groups in series or in parallel.

9. The battery module according to claim 8, characterized in that, The cells (100) of adjacent cell groups are oriented in opposite directions. One end of the electrical connector (500) is electrically connected to the positive electrode of one of the cells (100) in the adjacent cell group, and the other end of the electrical connector (500) is electrically connected to the negative electrode of another cell (100) in the adjacent cell group. The first connection portion (210) is electrically connected to the electrical connector (500).

10. The battery module according to any one of claims 1-5, characterized in that, It also includes a data acquisition unit (600) for acquiring the voltage of the plurality of said cells (100).

11. The battery module according to claim 10, characterized in that, The collecting device (600) is disposed on one side of the plurality of battery cells (100), and the plurality of electrical connectors (200) are disposed on the other side of the plurality of battery cells (100).

12. The battery module according to claim 10, characterized in that, The acquisition unit (600) includes a circuit board (610) and multiple voltage acquisition units (620). The multiple voltage acquisition units (620) are all disposed on the circuit board (610). The voltage acquisition units (620) are used to acquire the voltage of the corresponding battery cell (100).

13. The battery module according to claim 12, characterized in that, The acquisition unit (600) further includes at least one temperature acquisition unit (630), which is disposed on the circuit board (610) and is used to acquire the temperature of the battery cell (100).

14. The battery module according to any one of claims 11-13, characterized in that, It also includes a connecting member (700). Multiple acquisition members (600) are provided, and the connecting member (700) is provided between adjacent acquisition members (600). The connecting member (700) is used to electrically connect adjacent acquisition members (600).

15. The battery module according to any one of claims 1-5, characterized in that, It also includes two protective covers (800), and a plurality of the battery cells (100) and a plurality of the electrical connectors (200) are disposed between the two protective covers (800).

16. A battery pack, characterized in that, It includes a frame and a battery module disposed within the frame as described in any one of claims 1-15.

17. An electrical appliance, characterized in that, It includes a device body and a battery pack as described in claim 16 disposed on the device body.

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