Battery pack

Abstract

The utility model discloses a battery pack which comprises a box body, a cross beam, a battery module and a first supporting seat, the cross beam divides the box body into a first area for accommodating the battery module and a second area for accommodating other parts, and an output row serving as a positive electrode or a negative electrode is led out from the battery module. At least one output row is fixed on the first supporting seat, the box body comprises two edge beams which are oppositely arranged, the cross beam is arranged between the two edge beams, the top surface of the cross beam is lower than the top surfaces of the edge beams, so that a mounting space is reserved above the mounting surface, and the first supporting seat occupies the mounting space; according to the scheme, the height difference between the cross beam and the top surface of the box body edge beam is used as a mounting space for fixing and accommodating the first supporting seat, so that the function of fixing the first supporting seat is realized, the utilization rate of the internal space of the battery pack is improved, and the battery pack better meets the requirements of a CTP integration technology; and the battery pack has relatively high energy density in a limited space.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and more particularly to a battery pack. Background Technology

[0002] Existing battery packs are typically designed to include a housing, multiple cells connected in series to increase capacity, and a data acquisition module. This module is electrically connected to the terminals of the multiple cells to collect voltage or temperature information, enabling real-time monitoring of the cells' charging or discharging status. It can also detect cell temperature, and if the cell temperature is too high, an external cooling module can be used to cool it down promptly, ensuring the battery operates within a preset temperature range. This ensures battery safety during use, reduces potential safety hazards, and extends battery life.

[0003] The growth rate of battery capacity in new energy vehicles cannot meet the ever-increasing demand for range. Improving the space utilization of battery packs to increase energy density within the limited space of the vehicle is becoming increasingly important. In existing battery packs, beams are usually used to divide the housing into a first area for housing battery modules and a second area for housing the battery piping system. Although the high-voltage output terminals (which are electrically connected to the battery piping system) on the battery modules are protected by protective brackets, these brackets do not have a fixed position, which poses certain safety hazards during battery use. Moreover, these protective brackets are usually located in the second area. When the overall volume of the battery pack is limited, these protective brackets will occupy the space in the second area, and the volume of the first area for housing battery modules cannot be increased, thus preventing the improvement of battery energy density and limiting the total capacity of the battery pack. Utility Model Content

[0004] The purpose of this utility model is to provide a battery pack that mainly solves the technical problem of how to improve the safety of the battery pack while also increasing the energy density of the battery.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery pack includes a housing, a crossbeam, a battery module, and a first support base. The crossbeam divides the housing into a first area for accommodating the battery module and a second area for accommodating other components. The battery module has output terminals that serve as positive or negative terminals. At least one of the output terminals is fixed to the first support base. The housing includes two opposing side beams, and the crossbeam is disposed between the two side beams. The top surface of the crossbeam is lower than the top surface of the side beams, leaving installation space above the crossbeam. The first support base occupies the installation space.

[0007] In one of the technical solutions, the crossbeam has a mounting groove recessed into the first region on the side facing the second region. The first support is inserted into the mounting groove. A blocking part is protruding on the groove wall of the mounting groove. The blocking part is located on the path of the first support moving upward to prevent the first support from moving upward out of the mounting groove.

[0008] In one of the technical solutions, the first support base is provided with a flexible snap-fit ​​part. When the first support base is inserted into the mounting groove, the snap-fit ​​part and the blocking part engage with each other.

[0009] In one of the technical solutions, the elastic direction of the buckle includes at least the upward springing direction, and the top surface of the crossbeam is provided with a disassembly hole. The disassembly hole extends downward into the mounting groove and exposes the buckle. When the first support seat is inserted into the mounting groove, part of the buckle is located in the disassembly hole.

[0010] In one of the technical solutions, the disassembly hole extends downward through the blocking part into the mounting groove, and the disassembly hole communicates with the mounting groove along the length direction of the crossbeam.

[0011] In one of the technical solutions, a limiting part is provided on the wall of the mounting groove, and the limiting part at least abuts against the side of the buckle part facing the first region; the limiting part cooperates with the first support seat to at least restrict the first support seat from moving along the path towards the first region.

[0012] In one of the technical solutions, the battery pack further includes a data acquisition module and a second support base;

[0013] The acquisition module includes acquisition components and connectors that are electrically connected to each other. The battery module includes multiple electrically connected battery cells. The acquisition components are connected to the multiple battery cells respectively to acquire information from the multiple battery cells. The connector is used to output the information from the multiple battery cells. The connector is fixed to the second support base. The second support base is fixed to the crossbeam and also occupies the installation space.

[0014] In one of the technical solutions, the top surface of the crossbeam is provided with an installation interface, and the bottom of the second support is provided with an elastic buckle. The elastic buckle is inserted downward into the installation interface and engages with the inner wall of the crossbeam.

[0015] In one of the technical solutions, the acquisition device is a flexible circuit board, the connector is connected to one end of the acquisition device, the acquisition device is connected to the output row, the mounting interface extends along the length direction of the crossbeam, and the elastic buckle has a movement space of 1mm to 2mm in the length direction of the crossbeam.

[0016] In one technical solution, the top of the second support base is provided with a downwardly recessed groove, the connector is received in the groove, a battery management system is provided in the second region, the connector is electrically connected to the battery management system through multiple connecting wires, the second support base is bent and extended toward the second region with an extension portion, and multiple constraint members are provided at intervals on the extension portion, the constraint members constrain at least one of the corresponding connecting wires.

[0017] Compared with the prior art, the battery pack provided by this utility model has at least the following beneficial effects:

[0018] This design utilizes the vertical height difference between the top surfaces of the crossbeam and the side beam of the battery pack as the installation space for fixing and accommodating the first support. This not only secures the first support but also improves the utilization rate of the battery pack's internal space, avoiding the occupation of additional battery pack space above the crossbeam. This makes the battery pack more compatible with the requirements of CTP (Computer-to-Pack) integration technology, enabling it to achieve the highest possible energy density within a limited space. Furthermore, the structure where the first support is fixed to the top of the crossbeam offers advantages such as structural simplicity and ease of assembly and disassembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 A structural schematic diagram of the crossbeam, first support base, and output row provided in an embodiment of this application;

[0023] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0024] Figure 5 This is a schematic diagram of the acquisition module provided in an embodiment of this application;

[0025] Figure 6 for Figure 5 A magnified view of a section at point C;

[0026] Figure 7 This is a schematic diagram of the structure of the second support base provided in an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the structure of the second support provided in an embodiment of this application from another angle.

[0028] The following are the labeling elements in the figure:

[0029] 1. Box frame; 11. First area; 12. Second area; 13. Side beam;

[0030] 2. Crossbeam; 21. Mounting groove; 22. Blocking part; 23. Disassembly hole; 24. Limiting part; 25. Mounting interface;

[0031] 3. Battery module; 31. Battery cell; 32. Output port;

[0032] 4. Acquisition module; 41. Acquisition component; 411. Acquisition pin; 42. Connector;

[0033] 5. First support base; 51. Protective base; 52. Protective top cover; 53. Nut; 54. Buckle part;

[0034] 6. Connecting cables; 7. Installation space;

[0035] 8. Second support base; 81. Elastic buckle; 82. Extension; 821. Mounting hole; 83. Groove; 84. First reinforcing rib; 85. Second reinforcing rib; 9. Constraint; 91. Stud; 92. Cable tie. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to 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 application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] Please refer to the following: Figure 1 and Figure 2This embodiment provides a battery pack, including a housing 1, a crossbeam 2, battery modules 3, and a data acquisition module 4. The crossbeam 2 is disposed within the housing 1 and divides the internal space of the housing 1 into a first region 11 and a second region 12. The first region 11 is used to house the battery modules 3, which include multiple cells 31 connected in series and / or in parallel. The second region 12 is used to house other components (such as electrical components). These electrical components can be a battery management system (BMS) and a battery disconnect unit. The data acquisition module 4 is connected to multiple cells 31 to collect information from the cells 31 and outputs the collected information to the battery management system. After the battery management system establishes an electrical connection with the data acquisition module 4 through a connection line 6, the battery management system can detect the information of the cells 31 in real time. Specifically, the information of the cells 31 can include data such as voltage, current, and temperature. In particular, the battery management system can be regarded as the "brain" of the battery pack and can be composed of a CMU (Cell Monitor Unit) and a BMU (Battery Management Unit). The CMU, also known as the cell monitoring unit, is responsible for measuring parameters such as battery voltage, current, and temperature, and also performs functions such as equalization. After measuring these data, the CMU transmits them to the BMU. The BMU, or Battery Management Unit, is responsible for evaluating the data transmitted by the CMU. If the data is abnormal, it protects cell 31 by issuing a request to reduce the current or cutting off the charging / discharging path to prevent cell 31 from exceeding its permissible operating conditions. It also manages the charge and temperature of cell 31. The battery module 3 has an output bar 32 that serves as either a positive or negative terminal. This output bar 32 is electrically connected to the battery circuit breaker unit, allowing the battery circuit breaker unit to act as a bridge between the battery module 3 and an external power source, as well as between the battery module 3 and external electrical appliances. In other words, the battery circuit breaker unit can control the charging and discharging operations of the battery module 3 to ensure the safety of the battery module 3 during the charging and discharging process.

[0042] Please refer to the following: Figure 3 and Figure 4In this embodiment, the battery pack is provided with a first support base 5, which includes a protective base 51 and a protective cover 52. A nut 53 is fixed on the protective base 51, and the aforementioned output port 32 is fixed on this nut 53. The protective cover 52 and the protective base 51 are connected to each other and jointly cover the corresponding output port 32, thereby protecting the output port 32 and preventing operators from accidentally touching the energized output port 32. It also prevents the energized output port 32 from easily coming into direct contact with other components due to vibration during use, thereby improving the safety of the battery pack during use and subsequent maintenance. Specifically, the housing 1 includes two oppositely arranged side beams 13, and a crossbeam 2 is disposed between these two side beams 13. In addition to separating the battery management system, battery circuit breaker unit and battery module 3, the crossbeam 2 can also clamp and fix the battery module 3. The top surface of the crossbeam 2 is lower than the top surface of the side beams 13, leaving some installation space 7 above the crossbeam 2. The first support base 5 is accommodated in this installation space 7. Specifically, this solution utilizes the vertical height difference between the top surfaces of the crossbeam 2 and the side beam 13 of the housing 1 as the installation space 7 for fixing and accommodating the first support 5. This not only achieves the function of fixing the first support 5 but also improves the utilization rate of the battery pack's internal space, avoiding the occupation of additional battery pack space above the crossbeam 2. This makes the battery pack more compliant with the requirements of CTP integration technology, enabling the battery pack to have the largest possible energy density within a limited space. Furthermore, the structure of fixing the first support 5 to the top of the crossbeam also has the advantages of simple structure and easy assembly and disassembly.

[0043] Please refer to the following: Figure 5 and Figure 6 In this embodiment, the acquisition module 4 specifically includes an acquisition component 41 and a connector 42 that are electrically connected to each other. The acquisition component 41 is connected to multiple battery cells 31. The acquisition component 41 can be a structure with multiple wires to reduce costs. In this embodiment, the acquisition component 41 is preferably a flexible circuit board (i.e., FPC) with conductive lines. The acquisition component 41 is provided with multiple acquisition pins 411, which can be directly connected to the corresponding battery cells 31. In order to improve the connection reliability of the acquisition pins 411, the acquisition pins 411 can also be soldered to the busbar. The busbar is used to connect the terminals of two adjacent battery cells 31 at the same time to achieve the function of electrically connecting the two battery cells 31. The output busbar 32 serves as the positive or negative terminal of the entire battery module to achieve the purpose of leading out. The conductive lines on the acquisition component 41 are finally connected to the connector 42, so that the connector 42 serves as an acquisition port. The battery management system described above realizes the function of detecting the temperature data, voltage data and current data of each battery cell 31 by interlocking with the connector 42.

[0044] Please refer to the following: Figure 2 and Figure 6 To facilitate the fixing of connector 42, a second support base 8 is provided inside the battery pack in this embodiment. Connector 42 is fixed on this second support base 8, which serves as a transition point, allowing the use of existing conventional connectors 42 and facilitating the fixing of connector 42 to the crossbeam 2, thereby improving the reliability of connector 42. Specifically, both connector 42 and the second support base 8 occupy installation space 7. In particular, this solution eliminates the traditional wire harness isolation plate and utilizes the vertical height difference between the top surfaces of the crossbeam 2 and the side beam 13 as the installation space 7 for fixing connector 42. This not only achieves the function of fixing connector 42 but also further improves the utilization rate of the internal space of the battery pack, making the battery pack more in line with the requirements of CTP integration technology, that is, enabling the battery pack to have a large energy density within a limited space. Furthermore, the structure of fixing connector 42 to the top of the crossbeam 2 also has the advantages of simple structure and easy assembly and disassembly.

[0045] It should be noted that occupying the installation space 7 can include occupying all or part of the vertical space of the installation space 7. That is, the top surface height of the first support 5 can be lower than, equal to, or higher than the top surface height of the frame 13. Similarly, the top surface height of the second support 8 can be lower than, equal to, or higher than the top surface height of the frame 13. It can be configured as needed, and this application does not impose any restrictions. In the length direction of the beam 2, the first support 5 can occupy part of the installation space 7 to provide multiple first support 5s in the length direction of the beam 2. Similarly, the second support 8 can also occupy part of the installation space 7 to provide multiple second support 8s in the length direction of the beam 2. Specifically, multiple first support 5s and second support 8s can be provided in the length direction of the beam 2 to further save space.

[0046] Please refer to the following: Figures 1 to 4 The crossbeam 2 has a mounting groove 21 recessed into the first region 11 on the side facing the second region 12. The recessed direction of the mounting groove 21 is the direction from the second region 12 to the first region 11. The first support seat 5 is inserted into this mounting groove 21. The groove wall of the mounting groove 21 has a blocking part 22 protruding. The blocking part 22 is set on the path of the first support seat 5 moving upward, thereby preventing the first support seat 5 from moving upward out of the mounting groove 21. This prevents the first support seat 5 from moving outward along the insertion direction. The insertion direction of the first support seat 5 can be the direction from the second region 12 to the first region 11. Moving outward along the insertion direction can be the direction from the crossbeam 2 facing the second region 12 to moving away from the crossbeam 2.

[0047] Furthermore, the first support base 5 is provided with a latching part 54, which is elastic. When the first support base 5 is inserted into the mounting groove 21, the latching part 54 will engage with the blocking part 22 to achieve the function of automatically fixing the first support base 5 and prevent the first support base 5 from spontaneously disengaging from the mounting groove 21 due to vibration. That is, the engagement of the latching part 54 and the blocking part 22 can achieve the engagement of the first support base 5 and the crossbeam 2. More specifically, the elastic direction of the latching part 54 includes at least an upward springing direction. The top surface of the crossbeam 2 is provided with a disassembly hole 23, which extends downward into the mounting groove 21 and exposes the latching part 54. When the first support seat 5 is inserted into the mounting groove 21, a portion of the latching part 54 will be located within the disassembly hole 23, preventing the first support seat 5 from spontaneously detaching from the mounting groove 21. When it is necessary to remove the first support seat 5 from the crossbeam 2, a tool is simply inserted into the disassembly hole 23 and a downward force is applied to the latching part 54, causing it to disengage from the disassembly hole 23. Then, the first support seat 5 can be slid outward from the mounting groove 21. It should be noted that the latching part 54 extends along the direction from the second region 12 to the first region 11 and may form an upward protrusion at its end, thereby enabling it to engage with the blocking part 22 through the protruding structure.

[0048] Preferably, the disassembly hole 23 extends downward through the blocking portion 22 into the mounting groove 21, and the disassembly hole 23 extends along the length of the crossbeam 2 (i.e., Figure 3 The X-axis direction of the crossbeam 2 is connected to the mounting groove 21, which simplifies the machining of the crossbeam 2. Furthermore, a limiting part 24 protrudes from the wall of the mounting groove 21. This limiting part 24 is positioned along the path of the first support 5 moving towards the first region 11 to limit the movement of the first support 5, ensuring that the first support 5 can be installed on the crossbeam 2 with high positional accuracy. Simultaneously, it prevents the first support 5 from contacting the insulating sheet or heat insulation pad located in the first region 11, ensuring better safety for the battery pack. Specifically, the limiting part 24 at least abuts against the side of the latching part 54 facing the first region 11, thereby restricting the movement of the first support 5 towards the first region 11. The limiting part 24 can also abut against other sides of the first support 5 facing the first region 11 to improve the reliability of the limiting. Furthermore, the limiting part 24 can be a thinned structure recessed on the side wall of the crossbeam 2, so that the limiting part 25 cooperates with the first support seat 5, which can not only restrict the movement of the first support seat 5 along the path of movement towards the first region 11, but also restrict the movement of the first support seat 5 along the path of movement perpendicular to the first support seat 5. That is, the limiting part 24 can match the outer contour of the side of the first support seat 5 facing the first region 11, so that the first support seat 5 is disposed in the limiting part 24, thereby restricting the movement of the first support 5 in all directions.

[0049] Please refer to the following: Figure 3 , Figures 5 to 8 This section details how the second support base 8 is fixed to the crossbeam 2: The bottom of the second support base 8 has a protruding elastic buckle 81 with a certain elasticity. An installation interface 25 is provided on the top surface of the crossbeam 2. The second support base 8 is fixed to the top of the crossbeam 2 by inserting the elastic buckle 81 downwards into the installation interface 25. A connector 42 is connected to one end of the acquisition component 41 and fixed to the second support base 8. In this embodiment, one of the acquisition feet 411 on the acquisition component 41 is preferably connected to the output row 32, which is connected to the first support base 5. Therefore, the second support base 8 is restricted by the first support base 5 being fixed to the crossbeam 2, which improves the connection reliability of the second support base 8. Furthermore, there may be certain assembly errors in the installation of the battery module 3 and the connection between the acquisition component 41 and multiple battery cells 31. To ensure that the elastic buckle 81 can be inserted into the installation interface 25, this embodiment designs the installation interface 25 along the length direction of the crossbeam 2 (i.e.,...). Figure 3 The elastic buckle 81 extends a short distance along the X-axis, allowing the elastic buckle 81 to have a 1mm to 2mm range of motion along the X-axis. This allows the connector 42 as a whole to have a 1mm to 2mm range of motion along the X-axis, thereby eliminating some assembly errors. This ensures that the first support 5 and the second support 8 can be fixed on the crossbeam 2 simultaneously, while also preventing the large deformation of the acquisition component 41 after the connector 42 is fixed on the crossbeam 2. This ensures that the acquisition component 41 can maintain a reliable electrical connection with the multiple battery cells 31 in a relatively flat state, thereby ensuring the reliability and stability of data acquisition from the multiple battery cells 31.

[0050] Please refer to the following: Figure 2 , Figures 6 to 8The second support base 8 extends downward toward the second region 12 with an extension portion 82. Multiple constraint members 9 are spaced apart on the extension portion 82, corresponding to the connecting wires 6 and used to bind the connecting wires 6, ensuring a reliable and stable electrical connection between the battery management system and the connector 42. Specifically, the constraint member 9 includes a connected stud 91 and a cable tie 92. A through mounting hole 821 is provided on the extension portion 82, and the stud 91 is connected within the mounting hole 821, fixing the entire constraint member 9 to the extension portion 82. The cable tie 92 is used to simultaneously bind multiple connecting wires 6, ensuring a reliable and stable electrical connection between the battery management system and the connector 42. The mounting holes 821 can be spaced apart on the extension portion 82, allowing the constraint members 9 to be spaced apart on the extension portion 82. The arrangement direction of the constraint members 9 is the width direction of the second support base 8. Each constraint member 9 can correspond to one or more connecting wires 6, thus achieving a reasonable arrangement of multiple connecting wires 6 in the width direction of the second support base 8 and avoiding entanglement between the connecting wires 6. Preferably, each constraint 9 can correspond to multiple connecting lines 6, thereby constraining multiple connecting lines 6. This can reduce the number of constraint 6 and lower costs while avoiding crosstalk and tangling between connecting lines 6 and facilitating installation and maintenance.

[0051] In this embodiment, the top of the second support base 8 is provided with a downwardly recessed groove 83, and the connector 42 is accommodated in this groove 83, making the overall structure more compact and reasonable, and improving the utilization rate of the internal space of the battery. In order to ensure that the second support base 8 has sufficient structural strength, this embodiment provides a raised first reinforcing rib 84 at the bottom of the groove 83, and a raised second reinforcing rib 85 on the top surface of the extension 82, and the first reinforcing rib 84 is designed to be directly connected to the second reinforcing rib 85.

[0052] In summary, the battery pack of this embodiment has the advantage of high space utilization, thereby increasing energy density within a limited space. Moreover, both the first support base 5 and the second support base 8 have the advantages of reliable connection and easy assembly and disassembly, which makes the battery pack manufacturing process simpler and improves the production efficiency and maintenance efficiency of the battery pack.

[0053] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A battery pack, characterized in that, The device includes a housing (1), a crossbeam (2), a battery module (3), and a first support base (5). The crossbeam (2) divides the housing (1) into a first area (11) for accommodating the battery module (3) and a second area (12) for accommodating other components. The battery module (3) has output bars (32) that serve as positive or negative electrodes. At least one of the output bars (32) is fixed to the first support base (5). The housing (1) includes two side beams (13) arranged opposite to each other. The crossbeam (2) is located between the two side beams (13). The top surface of the crossbeam (2) is lower than the top surface of the side beams (13), leaving an installation space (7) above the crossbeam (2). The first support base (5) occupies the installation space (7).

2. The battery pack as described in claim 1, characterized in that, The crossbeam (2) has a mounting groove (21) recessed into the first region (11) on the side facing the second region (12). The first support (5) is inserted into the mounting groove (21). A blocking part (22) is protruding on the groove wall of the mounting groove (21). The blocking part (22) is located on the path of the first support (5) moving upward to prevent the first support (5) from moving upward away from the mounting groove (21).

3. The battery pack as described in claim 2, characterized in that, The first support base (5) is provided with a flexible snap-fit ​​part (54). When the first support base (5) is inserted into the mounting groove (21), the snap-fit ​​part (54) and the blocking part (22) engage with each other.

4. The battery pack as described in claim 3, characterized in that, The elastic direction of the buckle (54) includes at least the upward spring direction. The top surface of the crossbeam (2) is provided with a disassembly hole (23). The disassembly hole (23) extends downward into the mounting groove (21) and exposes the buckle (54). When the first support seat (5) is inserted into the mounting groove (21), part of the buckle (54) is located in the disassembly hole (23).

5. The battery pack as described in claim 4, characterized in that, The disassembly hole (23) extends downward through the blocking part (22) into the mounting groove (21), and the disassembly hole (23) communicates with the mounting groove (21) along the length of the crossbeam (2).

6. The battery pack as described in claim 3, characterized in that, The mounting groove (21) has a protruding limiting part (24) on its groove wall. The limiting part (24) at least abuts against the side of the buckle part (54) facing the first region (11). The limiting part (24) cooperates with the first support seat (5) to at least restrict the first support seat (5) from moving along the path toward the first region (11).

7. The battery pack according to any one of claims 1 to 6, characterized in that, The battery pack also includes a data acquisition module (4) and a second support base (8). The acquisition module (4) includes an acquisition component (41) and a connector (42) that are electrically connected to each other. The battery module (3) includes multiple electrically connected cells (31). The acquisition component (41) is connected to the multiple cells (31) respectively to acquire information of the multiple cells (31). The connector (42) is used to output information of the multiple cells (31). The connector (42) is fixed on the second support base (8). The second support base (8) is fixed on the crossbeam (2) and also occupies the installation space (7).

8. The battery pack as described in claim 7, characterized in that, The top surface of the crossbeam (2) is provided with an installation interface (25), and the bottom of the second support (8) is provided with an elastic buckle (81) with elasticity. The elastic buckle (81) is inserted downward into the installation interface (25) and is engaged with the inner wall of the crossbeam (2).

9. The battery pack as described in claim 8, characterized in that, The acquisition component (41) is a flexible circuit board, the connector (42) is connected to one end of the acquisition component (41), the acquisition component (41) is connected to the output row (32), the mounting interface (25) extends along the length direction of the crossbeam (2), and the elastic buckle (81) can have a movement space of 1mm~2mm in the length direction of the crossbeam (2).

10. The battery pack as claimed in claim 7, characterized in that, The top of the second support base (8) is provided with a downward recessed groove (83), and the connector (42) is housed in the groove (83). A battery management system is provided in the second region (12). The connector (42) is electrically connected to the battery management system through multiple connecting lines (6). The second support base (8) bends and extends toward the second region (12) with an extension (82). Multiple constraint members (9) are provided at intervals on the extension (82). The constraint members (9) constrain at least one of the corresponding connecting lines (6).

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