Battery pack and vehicle having the same

Abstract

The utility model discloses a kind of battery pack and vehicle with it, battery pack includes: box, battery module, information collector, support plate and circuit board assembly. Box has accommodating cavity inside, battery module and information collector are located in accommodating cavity, support plate is fixed in accommodating cavity, information collector is connected with support plate. Circuit board assembly is located in accommodating cavity, for sampling temperature and voltage of battery module, circuit board assembly is connected with information collector, circuit board assembly includes first circuit board assembly, and first circuit board assembly is fixedly connected with support plate. According to the battery pack of the utility model, battery pack can reduce material variety and assembly time, to reduce cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially a kind of battery pack and vehicle with it. BACKGROUND

[0002] In related art, FPC flexible circuit board needs to be set in battery pack to collect voltage, temperature and other data of battery module, and the data is transmitted to whole package BMS (Battery Management System, battery management controller), but the existing FPC flexible circuit board in battery pack has complex wiring, which increases material types and assembly difficulty, and increases cost. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides a kind of battery pack, the battery pack can reduce material types and assembly time, to reduce cost.

[0004] The utility model further provides a kind of vehicle, the vehicle includes above-mentioned battery pack.

[0005] According to the battery pack of the utility model embodiment, including: box, battery module, information collector, support plate and circuit board assembly.The box has accommodating cavity in, the battery module and the information collector are located in the accommodating cavity, the support plate is fixed in the accommodating cavity, and the information collector is connected with the support plate.The circuit board assembly is located in the accommodating cavity, for sampling the temperature and voltage of the battery module, and the circuit board assembly is connected with the information collector, and the circuit board assembly includes first circuit board assembly, and the first circuit board assembly is fixedly connected with the support plate.

[0006] According to the battery pack of the utility model embodiment, by making information collector be fixed in accommodating cavity by support plate, circuit board assembly for sampling the temperature and voltage of battery module is connected with information collector, and first circuit board assembly in circuit board assembly is fixedly connected with support plate, so that the assembly function of support plate is integrated with the assembly function of information collector and first circuit board assembly, can improve space utilization, also can reduce material types and assembly time, to reduce cost.

[0007] According to some embodiments of the utility model, the first circuit board assembly and the support plate are connected by a cable tie, and the cable tie is annular and sequentially arranged on the first circuit board assembly and the support plate.

[0008] According to some embodiments of the utility model, the first circuit board assembly and the support plate are adhesively connected.

[0009] According to some embodiments of the utility model, the information collector and the support plate are arranged at one end of the battery module along a first direction, the circuit board assembly extends along the first direction and is located on at least one side of the battery module along a second direction, wherein the first direction is perpendicular to the second direction.

[0010] In some embodiments of the utility model, the support plate comprises a first plate and a second plate, the first plate is perpendicular to the first direction, the first plate is located between the battery module and the information collector, and the information collector is fixedly connected with the first plate; the second plate is perpendicular to the second direction, one end of the second plate and the first plate along the second direction is connected, and the first circuit board assembly is connected with the second plate.

[0011] In some embodiments of the utility model, the battery pack further comprises an intermediate longitudinal beam, at least one side of the battery module along the second direction is provided with the intermediate longitudinal beam, the intermediate longitudinal beam extends along the first direction and is connected with the bottom wall of the accommodating cavity.

[0012] In some embodiments of the utility model, the battery module is multiple, multiple battery modules are arranged at intervals along the second direction, the information collector is multiple corresponding to multiple battery modules, and the intermediate longitudinal beam is arranged between any adjacent two battery modules.

[0013] In some embodiments of the utility model, the circuit board assembly further comprises a second circuit board assembly, the second circuit board assembly is arranged between the intermediate longitudinal beam and the battery module, and the second circuit board assembly is fixedly connected with the intermediate longitudinal beam.

[0014] In some embodiments of the utility model, the battery module comprises multiple battery cells, multiple battery cells are arranged along the first direction, the first circuit board assembly is used for sampling the temperature and voltage of a part of battery cells in the battery module, and the second circuit board assembly is used for sampling the temperature and voltage of another part of battery cells in the battery module.

[0015] In some embodiments of the utility model, the intermediate longitudinal beam is fixedly connected with a mounting piece, and the second circuit board assembly is connected with the mounting piece.

[0016] In some embodiments of the utility model, the mounting piece and the intermediate longitudinal beam are riveted.

[0017] In some embodiments of the utility model, the second circuit board assembly and the mounting piece are connected through clamping.

[0018] In some embodiments of this utility model, the mounting member includes a body portion and an extension portion. The body portion extends along a first direction and is connected to the intermediate longitudinal beam. The extension portion is connected to the body portion, and the extension portion and the body portion define a snap-fit ​​groove. The snap-fit ​​groove extends along the first direction and is open at least at one end away from the bottom wall of the receiving cavity. At least a portion of the second circuit board assembly is snapped into the snap-fit ​​groove.

[0019] In some embodiments of this utility model, there are multiple extensions and snap-fit ​​slots that correspond one-to-one, and the multiple extensions are spaced apart along the first direction.

[0020] In some embodiments of this utility model, the second circuit board assembly is bonded to the mounting component.

[0021] In some embodiments of this utility model, the battery module is connected to a positioning post, and at least one of the first circuit board assembly and the second circuit board assembly is provided with a positioning hole corresponding to the positioning post, and the positioning post passes through the positioning hole.

[0022] In some embodiments of this utility model, there are multiple positioning holes, which are spaced apart along the first direction, and the positioning posts are multiple ones that correspond one-to-one with the multiple positioning holes.

[0023] In some embodiments of this utility model, at least one of the first circuit board assembly and the second circuit board assembly includes a flexible portion and a plug-in portion. The flexible portion is connected to the battery module. The plug-in portion is connected to the flexible portion. The plug-in portion is located at one end of the flexible portion in the length direction and on one side of the flexible portion in the thickness direction. The plug-in portion is fixedly connected to the support plate. The plug-in portion is communicatively connected to the information collector. There are multiple plug-in portions.

[0024] In some embodiments of the present invention, at least one of the first circuit board assembly and the second circuit board assembly further includes a reinforcing plate, the reinforcing plate being connected to the flexible part, the reinforcing plate being located at one end of the flexible part in the length direction and on the side of the flexible part away from the insertion part in the thickness direction, the reinforcing plate of the first circuit board assembly being fixedly connected to the support plate, and the reinforcing plate of the second circuit board assembly being fixedly connected to the intermediate longitudinal beam.

[0025] In some embodiments of the utility model, the battery pack further includes a distribution box, a first crossbeam and a second crossbeam, the distribution box is communicated with the information collector, the first crossbeam and the second crossbeam extend along the second direction, the first crossbeam and the second crossbeam are spaced apart along the first direction and divide the accommodating cavity into a first cavity, a second cavity and a third cavity, the information collector and the support plate are arranged in the first cavity, the battery module is arranged in the second cavity, and the distribution box is arranged in the third cavity.

[0026] According to some embodiments of the utility model, one end of the support plate close to the bottom wall of the accommodating cavity is connected with a fixed plate, the fixed plate and the support plate are at an angle with each other, and the fixed plate is connected with the bottom wall of the accommodating cavity.

[0027] The vehicle according to the embodiments of the utility model comprises the above battery pack.

[0028] According to the vehicle of the embodiments of the utility model, the information collector is fixed in the accommodating cavity through the support plate, the circuit board assembly for sampling the temperature and voltage of the battery module is communicated with the information collector, and the first circuit board assembly in the circuit board assembly is fixedly connected with the support plate, so that the support plate integrates the assembly function of the information collector and the assembly function of the first circuit board assembly, the space utilization can be improved, the material types and assembly time can be reduced, and the cost can be reduced.

[0029] The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0031] Figure 1 It is the structure schematic view of battery pack according to the embodiments of the utility model;

[0032] Figure 2 It is Figure 1 It is the enlarged view of A in Fig.

[0033] Figure 3 It is the structure schematic view of another view of battery pack according to the embodiments of the utility model, wherein the box body is not shown;

[0034] Figure 4 It is Figure 3 It is the enlarged view of B in Fig.

[0035] Figure 5is an enlarged view of the connection between the second circuit board assembly and the middle longitudinal beam of the battery pack according to the embodiment of the utility model;

[0036] Figure 6 is a structural schematic view of the circuit board assembly of the battery pack according to the embodiment of the utility model.

[0037] Reference signs:

[0038] 100, battery pack;

[0039] 1, box; 11, containing cavity; 111, first cavity; 112, second cavity; 113, third cavity;

[0040] 2, battery module; 21, electric core; 22, positioning column;

[0041] 3, information collector;

[0042] 4, support plate; 41, first plate; 42, second plate; 43, fixed plate;

[0043] 5, circuit board assembly; 51, first circuit board assembly; 52, second circuit board assembly; 53, positioning hole; 54, flexible part; 55, plug-in part; 56, reinforcing plate; 57, nickel sheet terminal; 58, NTC terminal;

[0044] 61, middle longitudinal beam; 62, first cross beam; 63, second cross beam;

[0045] 7, hanging piece; 71, body part; 72, extension part; 73, clamping groove;

[0046] 8, distribution box;

[0047] 91, cable tie; 92, package body wire harness. DETAILED DESCRIPTION

[0048] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] The following is for reference. Figures 1-6 A battery pack 100 according to an embodiment of the present utility model is described.

[0052] like Figure 1 As shown, the battery pack 100 according to an embodiment of the present utility model includes a housing 1, a battery module 2, an information collector 3, a support plate 4, and a circuit board assembly 5.

[0053] Specifically, such as Figures 1-4 As shown, the housing 1 has a receiving cavity 11, in which the battery module 2 and the information collector 3 are located. A support plate 4 is fixed within the receiving cavity 11, and the information collector 3 is connected to the support plate 4. A circuit board assembly 5 is located within the receiving cavity 11 and is used to sample the temperature and voltage of the battery module 2. The circuit board assembly 5 is communicatively connected to the information collector 3. The circuit board assembly 5 includes a first circuit board assembly 51, which is fixedly connected to the support plate 4.

[0054] The circuit board assembly 5 can be a flexible circuit board (FPC), and the information collector 3 can be a battery information collector (BIC), which is responsible for collecting data such as voltage and temperature of the battery module 2 and transmitting it to the BMS for unified processing via the CAN bus.

[0055] Nickel-plated terminals 57 are led out from the circuit board assembly 5. The nickel-plated terminals 57 are soldered to the connecting pieces of the cells 21 in series in the battery module 2 for voltage sampling. NTC terminals 58 are also led out from the circuit board assembly 5. The free end of the NTC terminal 58 is equipped with an NTC (Negative Temperature Coefficient) thermistor. The NTC is attached to the lead piece of the cell 21 for collecting the temperature of the cell 21 in the battery module 2. Copper foil circuits are set inside the circuit board assembly 5 to complete signal transmission. The signals collected by the nickel-plated terminals 57 and NTC terminals 58 are transmitted to the information collector 3. The information collector 3 then summarizes the collected voltage and temperature signals of the battery module 2 to the entire battery pack BMS to realize the voltage and temperature sampling of the battery pack 100. This facilitates the BMS to perform SOC calculation, fault alarm, etc., to ensure that the battery pack 100 operates within a safe range.

[0056] The information collector 3 is fixed in the cavity 11 by the support plate 4. The circuit board assembly 5 includes a first circuit board assembly 51, which is fixedly connected to the support plate 4. That is, the support plate 4 integrates the assembly function of the information collector 3 and the assembly function of the first circuit board assembly 51, which can improve space utilization, reduce the types of materials and assembly time, thereby reducing costs.

[0057] Furthermore, existing flexible printed circuit boards (FPCs) are generally no longer than 1000mm. For battery modules exceeding 1000mm in length, more than two FPCs are typically required, which not only complicates wiring but also increases the variety of materials and assembly difficulty. The connection and fixing points of multiple FPCs also require a certain amount of space for operation and assembly.

[0058] The first circuit board assembly 51 in this application features an extra-long design, with a length exceeding 1000mm. The battery module 2 has both a negative and a positive terminal lead. One end of the first circuit board assembly 51 along its length is connected to either the negative or positive terminal lead, while the other end is fixedly connected to the support plate 4 and communicates with the information collector 3. The length of the first circuit board assembly 51 is approximately 1400mm-1500mm. By employing an integrated, extra-long first circuit board assembly 51, the wiring within the battery pack 100 can be simplified, further reducing the types of materials and assembly time, thereby lowering costs.

[0059] According to the battery pack 100 of this utility model embodiment, by fixing the information collector 3 in the receiving cavity 11 through the support plate 4, the circuit board assembly 5 for sampling the temperature and voltage of the battery module 2 is communicatively connected to the information collector 3, and the first circuit board assembly 51 in the circuit board assembly 5 is fixedly connected to the support plate 4, so that the support plate 4 integrates the assembly function of the information collector 3 and the assembly function of the first circuit board assembly 51, which can improve space utilization, reduce the types of materials and assembly time, thereby reducing costs.

[0060] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the first circuit board assembly 51 and the support plate 4 are connected by cable ties 91. The cable ties 91 are ring-shaped and sequentially pass through the first circuit board assembly 51 and the support plate 4. Connecting the first circuit board assembly 51 and the support plate 4 via the cable ties 91 only requires manually tightening the cable ties 91 to complete the fixation; no special tools are needed, allowing for quick operation and requiring minimal assembly space, making it suitable for assembly and installation in confined spaces. This allows for a detachable connection between the first circuit board assembly 51 and the support plate 4, facilitating future maintenance and replacement. Furthermore, the cable ties 91 are inexpensive, further reducing assembly costs.

[0061] In some embodiments of this utility model, the first circuit board assembly 51 is bonded to the support plate 4. The first circuit board assembly 51 can be bonded to the support plate 4 with structural adhesive, which ensures the connection stability between the first circuit board assembly 51 and the support plate 4 while achieving weight reduction. The adhesive connection can also reduce contact resistance and avoid the risk of poor contact of the first circuit board assembly 51. In addition, the adhesive connection is simple and quick, which can improve assembly efficiency and reduce assembly costs.

[0062] In some embodiments, such as Figure 1 and Figure 2 As shown, the first circuit board assembly 51 is bonded to the support plate 4 and also connected by cable ties 91, which can further enhance the connection stability between the first circuit board assembly 51 and the support plate 4.

[0063] In some embodiments of this utility model, such as Figures 1-3As shown, the information collector 3 and the support plate 4 are located at one end of the battery module 2 along the first direction, and the circuit board assembly 5 extends along the first direction and is located on at least one side of the battery module 2 along the second direction, wherein the first direction and the second direction are perpendicular to each other. The battery module 2 extends along the first direction, the information collector 3 is located at one end of the battery module 2 along the first direction, the support plate 4 is located between the information collector 3 and the battery module 2, and the circuit board assembly 5 extends along the first direction, wherein the first circuit board assembly 51 is located on at least one side of the battery module 2 along the second direction, which facilitates the connection between the first circuit board assembly 51 and the support plate 4. The structural layout is reasonable and can save space in the receiving cavity 11.

[0064] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the support plate 4 includes a first plate 41 and a second plate 42. The first plate 41 is perpendicular to a first direction and is located between the battery module 2 and the information collector 3. The information collector 3 is fixedly connected to the first plate 41. The second plate 42 is perpendicular to a second direction and is connected to one end of the first plate 41 along the second direction. The first circuit board assembly 51 is connected to the second plate 42. Specifically, the first plate 41 and the second plate 42 can be formed into an L-shaped structure, so that the information collector 3 can be set to extend along the second direction to facilitate the fixed connection between the information collector 3 and the first plate 41. The first circuit board assembly 51 extends along the first direction to facilitate the fixed connection between the first circuit board assembly 51 and the second plate 42. The structural design and layout are reasonable, which can reduce the assembly difficulty and facilitate the arrangement of other components in the receiving cavity 11, thereby improving the space utilization rate within the receiving cavity 11.

[0065] In some embodiments of this utility model, such as Figure 1 As shown, the battery pack 100 also includes a central longitudinal beam 61. The central longitudinal beam 61 is provided on at least one side of the battery module 2 along the second direction. The central longitudinal beam 61 extends along the first direction and connects to the bottom wall of the receiving cavity 11. The connection between the central longitudinal beam 61 and the housing 1 forms a "grid-shaped" frame, significantly improving the torsional stiffness of the battery pack 100 and reducing the stress on the battery module 2 caused by the deformation of the housing 1 during vehicle operation. When the battery pack 100 is subjected to a collision, the central longitudinal beam 61 can absorb and disperse the impact energy, preventing the battery module 2 from being directly deformed by pressure, thereby avoiding short circuits in the cells 21 within the battery module 2 that could lead to thermal runaway.

[0066] In some embodiments of this utility model, such as Figure 1As shown, there are multiple battery modules 2, which are spaced apart along the second direction. Multiple information collectors 3 correspond to the multiple battery modules 2. A central longitudinal beam 61 is provided between any two adjacent battery modules 2. The central longitudinal beam 61, spaced apart between adjacent battery modules 2, forms a physical barrier. When a single battery module 2 experiences thermal runaway, the central longitudinal beam 61 can delay the spread of flames and high-temperature gases to adjacent battery modules 2.

[0067] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the circuit board assembly 5 also includes a second circuit board assembly 52. ​​The second circuit board assembly 52 is located between the intermediate longitudinal beam 61 and the battery module 2, and is fixedly connected to the intermediate longitudinal beam 61. Circuit board assemblies 5 are provided on both sides of the battery module 2 along the second direction, such as... Figure 1 As shown in the example, the battery module 2 has a first circuit board assembly 51 and a second circuit board assembly 52 on both sides along the second direction. The second circuit board assembly 52 is located between the intermediate longitudinal beam 61 and the battery module 2, and the second circuit board assembly 52 is fixedly connected to the intermediate longitudinal beam 61, so that the intermediate longitudinal beam 61 integrates the assembly function of the second circuit board assembly 52, which can improve space utilization, reduce the types of materials and assembly time, thereby reducing costs.

[0068] The second circuit board assembly 52 in this application features an extra-long design, with a length exceeding 1000mm and approaching 1400mm-1500mm. By employing an integrated, extra-long second circuit board assembly 52, wiring within the battery pack 100 can be simplified, further reducing the types of materials and assembly time, thereby lowering costs.

[0069] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the battery module 2 includes multiple battery cells 21 arranged along a first direction. A first circuit board assembly 51 is used to sample the temperature and voltage of a portion of the battery cells 21 in the battery module 2, and a second circuit board assembly 52 is used to sample the temperature and voltage of another portion of the battery cells 21 in the battery module 2. The battery module 2 has a first circuit board assembly 51 and a second circuit board assembly 52 on both sides along a second direction. The first circuit board assembly 51 and the second circuit board assembly 52 work together to collect temperature and pressure information from the battery module 2. This avoids excessive operating voltage for the first circuit board assembly 51 and the second circuit board assembly 52 and also improves the efficiency of information collection by the first circuit board assembly 51 and the second circuit board assembly 52.

[0070] In some embodiments of this utility model, such as Figure 5As shown, a mounting component 7 is fixedly connected to the intermediate longitudinal beam 61, and the second circuit board assembly 52 is connected to the mounting component 7. The assembly space between the intermediate longitudinal beam 61 and the battery module 2 is limited, making it inconvenient to directly connect the second circuit board assembly 52 to the intermediate longitudinal beam 61. In this application, the mounting component 7 can be fixed to the intermediate longitudinal beam 61 first, then the intermediate longitudinal beam 61 can be assembled into the receiving cavity 11 as a whole, and then the second circuit board assembly 52 can be fixed to the mounting component 7. This reduces the assembly difficulty between the second circuit board assembly 52 and the intermediate longitudinal beam 61, which is beneficial for improving assembly efficiency and reducing costs.

[0071] In some embodiments of this utility model, such as Figure 5 As shown, the mounting component 7 is riveted to the intermediate longitudinal beam 61. The assembly space between the intermediate longitudinal beam 61 and the battery module 2 is limited, making it inconvenient to directly rivet the second circuit board assembly 52 to the intermediate longitudinal beam 61. In this application, the mounting component 7 can be riveted to the intermediate longitudinal beam 61 first, then the intermediate longitudinal beam 61 can be assembled into the receiving cavity 11 as a whole, and then the second circuit board assembly 52 can be fixed to the mounting component 7. This ensures the connection stability between the second circuit board assembly 52 and the intermediate longitudinal beam 61, reduces the assembly difficulty between the second circuit board assembly 52 and the intermediate longitudinal beam 61, and helps improve assembly efficiency and reduce costs.

[0072] In some embodiments of this utility model, such as Figure 5 As shown, the second circuit board assembly 52 is snap-fitted to the mounting component 7. This snap-fit ​​connection is simple and convenient, requiring no specialized tools and allowing for quick assembly, thus improving efficiency. It requires minimal assembly space, making it suitable for assembly and installation in confined spaces. The connection between the second circuit board assembly 52 and the mounting component 7 is detachable, facilitating future maintenance and replacement.

[0073] In some embodiments of this utility model, such as Figure 5 As shown, the mounting component 7 includes a body portion 71 and an extension portion 72. The body portion 71 extends along a first direction and is connected to the intermediate longitudinal beam 61. The extension portion 72 is connected to the body portion 71. The extension portion 72 and the body portion 71 define a snap-fit ​​groove 73. The snap-fit ​​groove 73 extends along the first direction and is open at least at one end away from the bottom wall of the receiving cavity 11. At least a portion of the second circuit board assembly 52 is snapped into the snap-fit ​​groove 73.

[0074] By providing the main body 71 and the extension 72, a snap-fit ​​groove 73 with one end open away from the bottom wall of the receiving cavity 11 can be formed. When assembling the second circuit board assembly 52, the second circuit board assembly 52 can be directly snapped into the snap-fit ​​groove 73 from the open end. The operation is simple and quick, which can reduce the operating space required for assembly and make the intermediate longitudinal beam 61 and the battery module 2 arranged more compactly, thereby improving space utilization. Specifically, the extension 72 can be a U-shaped structure with one end open away from the bottom wall of the receiving cavity 11.

[0075] In some embodiments of this utility model, such as Figure 5 As shown, there are multiple extensions 72 and snap-fit ​​slots 73, each corresponding to the other, with the extensions 72 spaced apart along the first direction. This allows the second circuit board assembly 52 to snap into the multiple snap-fit ​​slots 73, thereby enhancing the connection stability between the second circuit board assembly 52 and the mounting member 7. Specifically, there are two extensions 72 and snap-fit ​​slots 73, each corresponding to the other and spaced apart. This allows components such as the plug-in portion 55 on the second circuit board assembly 52 to be placed between two extensions 72, preventing interference between the second circuit board assembly 52 and the extensions 72.

[0076] In some embodiments of this invention, the second circuit board assembly 52 is bonded to the mounting component 7. The second circuit board assembly 52 can be bonded to the mounting component 7 using structural adhesive. This ensures the stability of the connection between the second circuit board assembly 52 and the mounting component 7 while achieving weight reduction. Bonding also reduces contact resistance, avoiding the risk of poor contact in the second circuit board assembly 52. ​​Furthermore, bonding is simple and quick, improving assembly efficiency and reducing assembly costs.

[0077] In some embodiments, such as Figure 5 As shown, while the second circuit board assembly 52 is bonded to the mounting component 7, it is also snapped together through the snap-fit ​​groove 73, which can further enhance the connection stability between the second circuit board assembly 52 and the mounting component 7.

[0078] In some embodiments of this utility model, such as Figure 3 , Figure 4 and Figure 6 As shown, the battery module 2 is connected to a positioning post 22. At least one of the first circuit board assembly 51 and the second circuit board assembly 52 is provided with a positioning hole 53 corresponding to the positioning post 22, and the positioning post 22 passes through the positioning hole 53. Through the cooperation of the positioning post 22 and the positioning hole 53, the assembly positioning function can be realized, which can reduce the assembly difficulty of the first circuit board assembly 51 and the second circuit board assembly 52, thereby improving the assembly efficiency.

[0079] In some embodiments of this utility model, such as Figure 3 , Figure 4 andFigure 6 As shown, there are multiple positioning holes 53, which are spaced apart along the first direction. There are multiple positioning posts 22, each corresponding to one of the positioning holes 53. The first circuit board assembly 51 and the second circuit board assembly 52 are relatively long and flexible. By providing multiple sets of cooperating positioning posts 22 and positioning holes 53 along the first direction, the assembly positioning function of the first circuit board assembly 51 and the second circuit board assembly 52 can be better achieved, thereby further improving assembly efficiency.

[0080] In some embodiments of this utility model, such as Figure 2 , Figure 5 and Figure 6 As shown, at least one of the first circuit board assembly 51 and the second circuit board assembly 52 includes a flexible portion 54 and a connector portion 55. The flexible portion 54 is connected to the battery module 2, and the connector portion 55 is connected to the flexible portion 54. The connector portion 55 is located at one end of the flexible portion 54 along its length and on one side of its thickness. The connector portion 55 is fixedly connected to the support plate 4 and is communicatively connected to the information collector 3. There are multiple connector portions 55. Each first circuit board assembly 51 has multiple connector portions 55, and / or each second circuit board assembly 52 has multiple connector portions 55.

[0081] Specifically, each first circuit board assembly 51 has two connectors 55, and / or each second circuit board assembly 52 has two connectors 55. Thus, each first circuit board assembly 51 and / or each second circuit board assembly 52 can sample the battery module 2 in segments. Multiple connectors 55 are respectively connected to the information collector 3, which reduces the diameter of the wiring harness connecting each connector 55 to the information collector 3, thereby reducing the wiring harness turning radius, saving space in the cavity 11, and improving space utilization.

[0082] In some embodiments of this utility model, such as Figure 2 , Figure 5 and Figure 6 As shown, at least one of the first circuit board assembly 51 and the second circuit board assembly 52 further includes a reinforcing plate 56. The reinforcing plate 56 is connected to the flexible part 54. The reinforcing plate 56 is located at one end of the flexible part 54 in the length direction and on the side of the flexible part 54 opposite to the insertion part 55 in the thickness direction. The reinforcing plate 56 of the first circuit board assembly 51 is fixedly connected to the support plate 4, and the reinforcing plate 56 of the second circuit board assembly 52 is fixedly connected to the intermediate longitudinal beam 61. The flexible part 54 is made of soft material and is easily bent and deformed when the insertion part 55 is repeatedly inserted and removed or subjected to force. The reinforcing plate 56 can provide local rigid support, which facilitates the fixed connection of the first circuit board assembly 51 to the support plate 4 and the fixed connection of the second circuit board assembly 52 to the intermediate longitudinal beam 61.

[0083] In some embodiments of this utility model, such asFigure 1 As shown, the battery pack 100 also includes a distribution box 8, a first crossbeam 62, and a second crossbeam 63. The distribution box 8 is communicatively connected to the information collector 3. The first crossbeam 62 and the second crossbeam 63 both extend along a second direction. The first crossbeam 62 and the second crossbeam 63 are spaced apart along a first direction and divide the receiving cavity 11 into a first cavity 111, a second cavity 112, and a third cavity 113. The information collector 3 and the support plate 4 are located in the first cavity 111, the battery module 2 is located in the second cavity 112, and the distribution box 8 is located in the third cavity 113.

[0084] The cavity 11 is equipped with a housing wire harness 92. The first circuit board assembly 51 and the second circuit board assembly 52 are respectively connected to the information collector 3 through the housing wire harness 92. There are multiple information collectors 3, and the multiple information collectors 3 are respectively connected to the power distribution box 8 to sample the temperature and pressure of the battery pack 100.

[0085] The first crossbeam 62 and the second crossbeam 63 divide the receiving cavity 11 into a first cavity 111, a second cavity 112, and a third cavity 113 arranged along the first direction. This allows the information collector 3 and the support plate 4 to be located in the first cavity 111, the battery module 2 in the second cavity 112, and the distribution box 8 in the third cavity 113. This design enables high and low voltage isolation, reduces interference from the battery module 2's sampling, thereby improving sampling accuracy and enhancing electrical safety within the receiving cavity 11.

[0086] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, a fixing plate 43 is connected to one end of the support plate 4 near the bottom wall of the receiving cavity 11. The fixing plate 43 is at an angle to the support plate 4 and is connected to the bottom wall of the receiving cavity 11. By providing the fixing plate 43, it is easy to fix the support plate 4 to the bottom wall of the receiving cavity 11, reducing the difficulty of installation. Specifically, the support plate 4 and the fixing plate 43 can be a single piece or separate pieces.

[0087] The vehicle according to an embodiment of the present invention includes: the battery pack 100 described above.

[0088] According to the vehicle of this utility model embodiment, by fixing the information collector 3 in the receiving cavity 11 through the support plate 4, the circuit board assembly 5 for sampling the temperature and voltage of the battery module 2 is communicatively connected to the information collector 3, and the first circuit board assembly 51 in the circuit board assembly 5 is fixedly connected to the support plate 4, so that the support plate 4 integrates the assembly function of the information collector 3 and the assembly function of the first circuit board assembly 51, which can improve space utilization, reduce the types of materials and assembly time, thereby reducing costs.

[0089] Other components of the battery pack 100 according to the embodiments of the present invention, such as the battery module 2 and the battery cell 21, are known to those skilled in the art and will not be described in detail here.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: The box (1) has a receiving cavity (11) inside; A battery module (2) and an information collector (3) are disposed within the receiving cavity (11); A support plate (4) is fixed inside the receiving cavity (11), and the information collector (3) is connected to the support plate (4). The circuit board assembly (5) is located in the receiving cavity (11) and is used to sample the temperature and voltage of the battery module (2). The circuit board assembly (5) is communicatively connected to the information collector (3). The circuit board assembly (5) includes a first circuit board assembly (51) which is fixedly connected to the support plate (4).

2. The battery pack according to claim 1, characterized in that, The first circuit board assembly (51) is connected to the support plate (4) by a cable tie (91), which is ring-shaped and passes through the first circuit board assembly (51) and the support plate (4) in sequence.

3. The battery pack according to claim 1, characterized in that, The first circuit board assembly (51) is bonded to the support plate (4).

4. The battery pack according to claim 1, characterized in that, The information collector (3) and the support plate (4) are disposed at one end of the battery module (2) along a first direction, and the circuit board assembly (5) extends along the first direction and is located on at least one side of the battery module (2) along a second direction, wherein the first direction and the second direction are perpendicular to each other.

5. The battery pack according to claim 4, characterized in that, The support plate (4) includes: The first plate (41) is perpendicular to the first direction and is located between the battery module (2) and the information collector (3). The information collector (3) is fixedly connected to the first plate (41). The second board (42) is perpendicular to the second direction and is connected to one end of the first board (41) along the second direction. The first circuit board assembly (51) is connected to the second board (42).

6. The battery pack according to claim 4, characterized in that, Also includes: The intermediate longitudinal beam (61) is provided on at least one side of the battery module (2) along the second direction, and the intermediate longitudinal beam (61) extends along the first direction and is connected to the bottom wall of the receiving cavity (11).

7. The battery pack according to claim 6, characterized in that, There are multiple battery modules (2), which are spaced apart along the second direction. There are multiple information collectors (3) corresponding to the multiple battery modules (2), and the intermediate longitudinal beam (61) is provided between any two adjacent battery modules (2).

8. The battery pack according to claim 6, characterized in that, The circuit board assembly (5) further includes a second circuit board assembly (52), which is provided between the intermediate longitudinal beam (61) and the battery module (2), and the second circuit board assembly (52) is fixedly connected to the intermediate longitudinal beam (61).

9. The battery pack according to claim 8, characterized in that, The battery module (2) includes: Multiple battery cells (21) are arranged along the first direction. The first circuit board assembly (51) is used to sample the temperature and voltage of a portion of the battery cells (21) in the battery module (2), and the second circuit board assembly (52) is used to sample the temperature and voltage of another portion of the battery cells (21) in the battery module (2).

10. The battery pack according to claim 8, characterized in that, The intermediate longitudinal beam (61) is fixedly connected to a mounting component (7), and the second circuit board assembly (52) is connected to the mounting component (7).

11. The battery pack according to claim 10, characterized in that, The mounting component (7) is riveted to the intermediate longitudinal beam (61).

12. The battery pack according to claim 10, characterized in that, The second circuit board assembly (52) is snapped into connection with the mounting component (7).

13. The battery pack according to claim 12, characterized in that, The mount (7) includes: Body part (71), the body part (71) extends along a first direction, the body part (71) is connected to the intermediate longitudinal beam (61); An extension (72) is connected to the body (71), and the extension (72) and the body (71) define a snap-fit ​​groove (73). The snap-fit ​​groove (73) extends along the first direction and is open at least at one end away from the bottom wall of the receiving cavity (11). At least a portion of the second circuit board assembly (52) is snapped into the snap-fit ​​groove (73).

14. The battery pack according to claim 13, characterized in that, The extension (72) and the snap-fit ​​groove (73) are a plurality of one-to-one correspondences, and the plurality of extensions (72) are spaced apart along the first direction.

15. The battery pack according to claim 10, characterized in that, The second circuit board assembly (52) is bonded to the mounting component (7).

16. The battery pack according to claim 8, characterized in that, The battery module (2) is connected to a positioning post (22). At least one of the first circuit board assembly (51) and the second circuit board assembly (52) is provided with a positioning hole (53) corresponding to the positioning post (22), and the positioning post (22) passes through the positioning hole (53).

17. The battery pack according to claim 16, characterized in that, There are multiple positioning holes (53), which are spaced apart along the first direction. The positioning posts (22) are multiple ones that correspond one-to-one with the multiple positioning holes (53).

18. The battery pack according to claim 8, characterized in that, At least one of the first circuit board assembly (51) and the second circuit board assembly (52) includes: A flexible part (54) is connected to the battery module (2); A plug-in part (55) is connected to the flexible part (54). The plug-in part (55) is located at one end of the flexible part (54) in the length direction and on one side of the flexible part (54) in the thickness direction. The plug-in part (55) is fixedly connected to the support plate (4). The plug-in part (55) is communicatively connected to the information collector (3). There are multiple plug-in parts (55).

19. The battery pack according to claim 18, characterized in that, At least one of the first circuit board assembly (51) and the second circuit board assembly (52) further includes: A reinforcing plate (56) is connected to the flexible part (54). The reinforcing plate (56) is located at one end of the flexible part (54) in the length direction and on the side of the flexible part (54) away from the plug-in part (55) in the thickness direction. The reinforcing plate (56) of the first circuit board assembly (51) is fixedly connected to the support plate (4). The reinforcing plate (56) of the second circuit board assembly (52) is fixedly connected to the intermediate longitudinal beam (61).

20. The battery pack according to claim 4, characterized in that, Also includes: The distribution box (8) is communicatively connected to the information collector (3). The first crossbeam (62) and the second crossbeam (63) extend along the second direction. The first crossbeam (62) and the second crossbeam (63) are spaced apart along the first direction and divide the receiving cavity (11) into a first cavity (111), a second cavity (112) and a third cavity (113). The information collector (3) and the support plate (4) are located in the first cavity (111), the battery module (2) is located in the second cavity (112), and the power distribution box (8) is located in the third cavity (113).

21. The battery pack according to claim 1, characterized in that, A fixing plate (43) is connected to one end of the support plate (4) near the bottom wall of the receiving cavity (11). The fixing plate (43) is at an angle to the support plate (4) and is connected to the bottom wall of the receiving cavity (11).

22. A vehicle, characterized in that, Includes the battery pack according to any one of claims 1-21.

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