Battery pack

Abstract

The utility model provides a battery pack, comprising: a box body comprising a plurality of side box plates, and the plurality of side box plates enclose to form an accommodating space; the battery cell group module is arranged in the accommodating space; the battery cell group module comprises a plurality of battery cell stacking bodies, a plurality of connecting beams and two side plate groups; the plurality of battery cell stacking bodies are arranged along a first direction, and each battery cell stacking body comprises a plurality of battery cells stacked along a second direction; connecting beams are arranged at the two ends, distributed in the first direction, of each battery cell stacking body; the two side plate groups are located on the two sides, distributed in the second direction, of the battery cell stacking body, and the two side plate groups are connected through the connecting beam and clamp the battery cell stacking body; and in the second direction, the distance between the two side plate sets is adjustable, so that the two side plate sets can be matched with the corresponding side box plates for limiting. In the battery pack provided by the invention, the side plate groups and the side box plates are matched for limiting, so that the material cost of the battery pack is reduced, and the assembly process of the battery pack is simplified.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and more particularly to a battery pack. Background Technology

[0002] A battery pack can contain multiple battery modules, each including at least one cell stack, and each cell stack including multiple stacked cells. To allow the battery modules to be installed in predetermined positions within the battery pack housing, they can be secured to the housing using bolts or other fasteners.

[0003] To ensure a reliable connection between the battery module and the casing, multiple bolts are needed to secure the battery module. However, a large number of bolts complicates the battery pack assembly process. Furthermore, after prolonged handling or use, bolts may loosen, jeopardizing the reliability of the connection between the battery module and the casing. Utility Model Content

[0004] In view of this, the purpose of this application is to propose a battery pack that at least partially solves the problem of complex connection process between battery modules and battery pack housing.

[0005] Based on the above objectives, a first aspect of this application provides a battery pack, comprising: a housing including multiple side panels, the multiple side panels enclosing a receiving space; a cell assembly module disposed within the receiving space; the cell assembly module including multiple cell stacks, multiple connecting beams, and two side plate assemblies; the multiple cell stacks are arranged along a first direction, each cell stack including multiple cells stacked along a second direction; the connecting beams are arranged at both ends of each cell stack along the first direction; the two side plate assemblies are located on both sides of the cell stack along the second direction, the two side plate assemblies being connected and clamping the cell stack by the connecting beams; wherein, along the second direction, the distance between the two side plate assemblies is adjustable, so that the two side plate assemblies can respectively cooperate with and limit the movement of their respective corresponding side panels.

[0006] Optionally, along the second direction, at least one of the side plate assemblies is movable relative to the connecting beam.

[0007] Optionally, the movable side plate assembly is defined as a first side plate assembly, the first side plate assembly being slidably connected to the end of the corresponding connecting beam, and a first elastic element being connected between the first side plate assembly and the end of the corresponding connecting beam.

[0008] Optionally, the battery cell assembly module includes a beam adjusting fastener that passes through the first side plate assembly, with one end of the beam adjusting fastener connected to the end of the connecting beam and the other end able to abut against the surface of the first side plate assembly away from the connecting beam, and the first elastic element fitted onto the beam adjusting fastener.

[0009] Optionally, a guide groove is formed on one side wall of the first side plate assembly near the connecting beam, and the end of the connecting beam can be inserted into the guide groove.

[0010] Optionally, one of the side panel and the corresponding side panel group is provided with a positioning groove, and the other is provided with a positioning protrusion, wherein the positioning protrusion engages with the positioning groove for limiting positioning.

[0011] Optionally, the positioning groove is disposed on the surface of the side panel assembly near the side box plate, and the positioning groove extends from one end of the side panel assembly to the other end along the first direction; the positioning protrusion is disposed on the surface of the side box plate near the side panel assembly, and the positioning protrusion extends from one end of the side box plate to the other end along the first direction.

[0012] Optionally, the height direction of the battery cell module is defined as a third direction; a first chamfer is formed between the groove wall and the bottom of the positioning groove along the third direction; and / or, a second chamfer is formed on the edge of the positioning protrusion along the third direction and close to the positioning groove.

[0013] Optionally, the side plate assembly has an elastic component connected to the surface near the cell stack, the elastic component being able to extend and retract along the second direction and abut against the end surface of the cell stack.

[0014] Optionally, the cell assembly module further includes a battery management system, which includes multiple slave control boards. The slave control boards are mounted on the side panel assembly and are electrically connected to the corresponding cell stack.

[0015] Optionally, the battery cell includes a pouch cell.

[0016] As can be seen from the above, in the battery pack provided by this application, when the cell module is installed into the housing space, the side plate assembly can be moved along the second direction to achieve a locking and limiting engagement between the side plate assembly and the side panel of the housing. After the side plate assembly and the side panel achieve this locking and limiting engagement, the cell module can be relatively stably maintained in a preset position within the housing space. Compared to fixing the cell module with bolts, the locking and limiting engagement between the side plate assembly and the side panel in this application not only saves a large number of bolts, thereby reducing the material cost of the battery pack, but also simplifies the assembly process of the cell module, saving a large amount of time spent tightening bolts, and helps to improve the production efficiency of the battery pack.

[0017] Meanwhile, the cell module of this application can be directly connected to the housing, eliminating the process of assembling cells into multiple battery modules. This not only reduces the number of battery pack components and material costs, simplifies the assembly process, and improves assembly efficiency, but also helps to increase the energy density of the battery pack. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a partial schematic diagram of the battery pack according to an embodiment of this application;

[0020] Figure 2 This is a partial exploded view of the battery pack according to an embodiment of this application;

[0021] Figure 3 This is a side view of a partial cross-section of the battery pack according to an embodiment of this application;

[0022] Figure 4 for Figure 3 An enlarged view of part A at the first moment;

[0023] Figure 5 for Figure 3 A magnified view of part A at the second moment;

[0024] Figure 6 This is a partial top view of the battery pack according to an embodiment of this application;

[0025] Figure 7 This is a partial exploded view of the cell assembly module of the battery pack according to an embodiment of this application;

[0026] Figure 8 for Figure 7Enlarged schematic diagram of part B in the middle;

[0027] Figure 9 for Figure 3 An enlarged schematic diagram of another structure in part A.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Box body; 110. Side panel; 120. Storage space; 130. Bottom plate;

[0030] 200, Cell assembly module; 210, Cell stack; 211, Cell; 220, Side plate assembly; 220a, First side plate assembly; 221, Guide groove; 230, Beam adjusting fastener; 240, First elastic element; 250, Connecting beam; 260, Elastic component; 261, Second elastic element; 262, Push plate;

[0031] 300, positioning groove; 310, first chamfer;

[0032] 400, Positioning protrusion; 410, Second chamfer. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0034] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0035] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0037] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] Figure 1 A partial schematic diagram of a battery pack is shown. Figure 2 A partial explosion diagram of the battery pack is shown.

[0039] like Figure 1 and Figure 2 This application provides a battery pack, including: a housing 100, including multiple side panels 110, the multiple side panels 110 enclosing a receiving space 120; a cell assembly module 200, disposed within the receiving space 120; the cell assembly module 200 includes multiple cell stacks 210, multiple connecting beams 250, and two side panel assemblies 220; the multiple cell stacks 210 are arranged along a first direction (e.g., ...). Figure 2 The cells are arranged in the X direction, and each cell stack 210 includes multiple cells arranged along the second direction (e.g., the X direction). Figure 2 The battery cells 211 are stacked in the Y direction; each battery cell stack 100 has a connecting beam 250 at both ends distributed along the first direction; two side plate groups 220 are located on both sides of the battery cell stack 210 distributed along the second direction, and the two side plate groups 220 are connected and clamped to the battery cell stack 210 by the connecting beam 250; wherein, along the second direction, the distance between the two side plate groups 220 is adjustable so that the two side plate groups 220 can respectively cooperate with and limit the movement of their respective corresponding side box plates 110.

[0040] For example, the housing 100 may include four side panels 110, which may be configured as a rectangular frame, and the accommodating space 120 is located within the rectangular frame.

[0041] For example, the housing 100 also includes a bottom plate 130, and all the side panels 110 are connected to the same side of the bottom plate 130.

[0042] For example, a groove can be provided on the side panel 110, and a portion of the side panel assembly 220 can be embedded in the groove so that the side panel assembly 220 and the side panel 110 can be matched and limited; or, a limiting protrusion can be provided on the side panel 110, and the limiting protrusion can be inserted into the side panel assembly 220 so that the side panel assembly 220 and the side panel 110 can be matched and limited.

[0043] For example, the two side panel assemblies 220 can be connected to their respective corresponding side box panels 110 in the same or different ways.

[0044] For example, along the second direction, at least one side plate assembly 220 is movable relative to the connecting beam 250, that is, the side plate assembly 220 can be slidably connected to the connecting beam 250, or the two can be spaced apart (the two can be connected by an elastic element such as a spring), so that the side plate assembly 220 can move along the second direction.

[0045] Figure 3 A side-view cross-sectional diagram of the battery pack is shown. Figure 4 Showing Figure 3 A magnified view of part A at the first moment. Figure 5 Showing Figure 3 A magnified schematic diagram of part A at the second moment.

[0046] For example, for the side panel assembly 220 that is capable of moving in the second direction, such as Figure 4 It can move in the positive direction of the second direction when an external force is applied; such as Figure 5 It can be reset and moved in the opposite direction of the second direction after the external force disappears.

[0047] When installing the cell assembly module 200 into the housing 100, such as Figure 4 Under preset first conditions (e.g., applying an external force to the movable side plate assembly 220), a tooling can be used to drive the side plate assembly 220 to move closer to the battery cell 211 along a second direction, causing the battery cell assembly module 200 to shrink and deform. At this time, it is convenient to put the entire battery cell assembly module 200 into the receiving space 120.

[0048] like Figure 5 When the battery cell module 200 is fully placed in the accommodating space 120, under the preset second conditions (for example, removing the external force applied to the side plate group 220, or applying a reverse external force to the side plate group 220), the side plate group 220 can approach the corresponding side box plate 110 in the second direction, and after contacting the corresponding side box plate 110, the two achieve a cooperative connection.

[0049] In the battery pack of this embodiment, after the cell assembly module 200 is installed into the receiving space 120 of the housing 100, the side plate assembly 220 can be moved along the second direction, thereby achieving a mating and limiting connection between the side plate assembly 220 and the side box plate 110 of the housing 100. After the side plate assembly 220 and the side box plate 110 achieve a mating and limiting connection, the cell assembly module 200 can be relatively stably maintained in a preset position within the receiving space 120. Compared to fixing the cell assembly module 200 with bolts, the mating and limiting connection between the side plate assembly 220 and the side box plate 110 in this embodiment not only saves a large number of bolts, thereby reducing the material cost of the battery pack, but also simplifies the assembly process of the cell assembly module 200, saving a large amount of time occupied by tightening bolts, and helping to improve the production efficiency of the battery pack.

[0050] Meanwhile, the cell assembly module 200 in this embodiment can be directly connected to the housing 100, eliminating the process of assembling the cells into a battery module. This not only reduces the number of battery pack components and material costs, simplifies the assembly process, and improves assembly efficiency, but also helps to increase the energy density of the battery pack.

[0051] Figure 6 A partial top-view diagram of the battery pack is shown.

[0052] like Figure 4 , Figure 5 and Figure 6 In some embodiments, the movable side plate assembly 220 is defined as a first side plate assembly 220a, which is slidably connected to the end of the corresponding connecting beam 250, and a first elastic member 240 is connected between the first side plate assembly 220a and the end of the corresponding connecting beam 250.

[0053] For example, the first elastic element 240 may include a spring or a solid structural element formed of an elastic material (e.g., rubber).

[0054] For example, the end of the connecting beam 250 may be connected to a guide rail or a fastener, and the first side plate assembly 220a may be slidably connected to the end of the connecting beam 250 via the guide rail or fastener.

[0055] For example, one of the ends of the connecting beam 250 and the first side plate assembly 220a may be provided with a groove, and the other may be provided with a protrusion that can be inserted into the groove. Through the sliding engagement of the groove and the protrusion, the first side plate assembly 220a and the end of the connecting beam 250 can be slidably connected.

[0056] like Figure 4Taking the installation of the battery cell assembly module 200 into the housing 100 as an example, when placing the battery cell assembly module 200 into the receiving space 120, an external force can be applied to the first side plate assembly 220a to cause the first elastic member 240 corresponding to the first side plate assembly 220a to contract, thereby allowing the first side plate assembly 220a to move along the second direction towards the battery cell 211, thereby reducing the width of the battery cell assembly module 200 along the second direction, so that the battery cell assembly module 200 can be easily placed into the housing 100.

[0057] like Figure 5 After the first side plate assembly 220a is aligned with the corresponding side box plate 110, the external force can be removed, the first elastic element 240 returns to its original state and applies elastic force to the first side plate assembly 220a. Under the action of the elastic force, the first side plate assembly 220a approaches the side box plate 110, and after the first side plate assembly 220a contacts the side box plate 110, the two achieve a matching and limiting connection.

[0058] In this embodiment, the connecting beam 250 extends along a first direction, and the first side plate assembly 220a is slidably connected to the end of the connecting beam 250, providing a structural basis for the first side plate assembly 220a to move along a second direction. Simultaneously, a first elastic member 240 is provided between the first side plate assembly 220a and the end of the connecting beam 250. Under the action of the first elastic member 240, the movement of the first side plate assembly 220a is restricted when no external force is applied, thereby ensuring a stable fit and limiting connection between the first side plate assembly 220a and the side box plate 110, preventing separation between them. When the first side plate assembly 220a is subjected to external force, the first elastic member 240 can contract and deform, providing movement space for the first side plate assembly 220a, ensuring separation between the first side plate assembly 220a and the side box plate 110, making the assembly and disassembly of the battery cell module 200 and the housing 100 more convenient.

[0059] like Figure 4 and Figure 5 In some embodiments, the battery cell module 200 includes a beam adjusting fastener 230 that passes through the first side plate assembly 220a. One end of the beam adjusting fastener 230 is connected to the end of the connecting beam 250, and the other end is able to abut against the surface of the first side plate assembly 220a away from the connecting beam 250. A first elastic member 240 is fitted onto the beam adjusting fastener 230.

[0060] For example, the beam adjusting fastener 230 can be connected to the end of the connecting beam 250 by means of a threaded connection.

[0061] For example, the beam adjusting fastener 230 may be a bolt with its nut located on the side of the first side plate assembly 220a away from the connecting beam 250.

[0062] Since the beam adjusting fastener 230 passes through the first side plate assembly 220a, it can guide the first side plate assembly 220a during its movement. Simultaneously, when the end of the beam adjusting fastener 230 furthest from the connecting beam 250 abuts against the first side plate assembly 220a, it can limit the movement of the first side plate assembly 220a, preventing it from slipping off the connecting beam 250. Furthermore, the first elastic member 240 is fitted onto the beam adjusting fastener 230, which can limit its position and prevent it from moving out of the space between the end of the first side plate assembly 220a and the connecting beam 250.

[0063] Figure 7 A partial exploded view of the battery cell module 200 is shown. Figure 8 Showing Figure 7 Enlarged schematic diagram of part B.

[0064] like Figure 7 and Figure 8 In some embodiments, a guide groove 221 is formed on one side wall of the first side plate assembly 220a near the connecting beam 250, and the end of the connecting beam 250 can be inserted into the guide groove 221.

[0065] For example, the cross-sectional shape of the guide groove 221 matches the cross-sectional shape of the end of the connecting beam 250, and the outer contour dimension of the end of the connecting beam 250 is not greater than the cross-sectional dimension of the guide groove 221, so that the end of the connecting beam 250 can be smoothly inserted into the guide groove 221.

[0066] For example, the dimensions of the portion of the connecting beam 250 that mates with the guide groove 221 may be the same as or different from the dimensions of the other portions of the connecting beam 250.

[0067] For example, each first elastic element 240 is at least partially located within the guide groove 221.

[0068] For example, when the side panel assembly 220 is connected to the corresponding side box panel 110 in a limiting engagement, the bottom of the side panel assembly 220 abuts against the bottom plate 130, and the bottom of the connecting beam 250 can also abut against the bottom plate 130.

[0069] The first side plate assembly 220a is inserted into the end of the connecting beam 250 via the guide groove 221, which can limit the movement of the first side plate assembly 220a. At the same time, when the first side plate assembly 220a is engaged and limited in connection with the corresponding side box plate 110, the first side plate assembly 220a can also limit the connecting beam 250 inserted in the guide groove 221, preventing the connecting beam 250 from moving away from the bottom plate 130, and further improving the connection reliability between the battery cell module 200 and the housing 100.

[0070] Figure 9 Showing Figure 3 An enlarged schematic diagram of another structure in part A.

[0071] like Figure 5 and Figure 9 In some embodiments, one of the side panel 110 and the corresponding side panel group 220 is provided with a positioning groove 300, and the other is provided with a positioning protrusion 400, which engages with and limits the positioning groove 300.

[0072] For example, the battery pack may be provided with multiple positioning slots 300, and the positioning protrusions 400 correspond one-to-one with the positioning slots 300.

[0073] For example, multiple positioning protrusions 400 can be matched with the same positioning groove 300 for limiting connection.

[0074] like Figure 5 A positioning groove 300 can be provided on the surface of the side panel assembly 220 near the side box panel 110, and a positioning protrusion 400 can be provided on the surface of the side box panel 110 near the positioning groove 300. For example... Figure 9 Alternatively, a positioning protrusion 400 can be provided on the surface of the side panel assembly 220 near the side box panel 110, and a positioning groove 300 can be provided on the surface of the side box panel 110 near the positioning protrusion 400.

[0075] In this embodiment, the side plate assembly 220 and the side box plate 110 are connected by positioning protrusions 400 and positioning grooves 300, which can reduce the changes to the original structure of the cell assembly module 200 and the side box plate 110 and help reduce the manufacturing cost of the battery pack.

[0076] At the same time, with Figure 5Taking the structure shown as an example, since there may be errors between the actual dimensions of the battery cell 211, side plate assembly 220, and connecting beam 250 after assembly and their design dimensions, the actual gap between the side plate assembly 220 and the side box plate 110 will also differ from the design gap. Because the positioning protrusion 400 in this embodiment protrudes from the surface of the side box plate 110, even if the actual gap between the side box plate 110 and the side plate assembly 220 is slightly larger than the design gap, it does not affect the insertion of the positioning protrusion 400 into the positioning groove 300 and the achievement of a mating and limiting connection between the two. Therefore, the assembly accuracy requirements of the battery pack can be reduced, which helps to improve the assembly efficiency of the battery pack.

[0077] like Figure 8 In some embodiments, the positioning groove 300 is disposed on the surface of the side panel assembly 220 near the side box panel 110, and the positioning groove 300 is along a first direction (e.g., Figure 8 The X direction extends from one end of the side panel assembly 220 to the other end; the positioning protrusion 400 is disposed on the surface of the side panel 110 near the side panel assembly 220, and the positioning protrusion 400 extends from one end of the side panel 110 to the other end along the first direction.

[0078] For example, the positioning protrusion 400 can be set continuously or intermittently.

[0079] In this embodiment, extending the length of the positioning groove 300 and the positioning protrusion 400 as much as possible helps to improve the connection strength between the positioning protrusion 400 and the positioning groove 300, further improving the connection reliability between the cell assembly module 200 and the housing 100. During battery pack handling or use, this prevents the cell assembly module 200 from separating from the housing 100, thereby improving the safety of the battery pack.

[0080] like Figure 4 and Figure 5 In some embodiments, the height direction of the battery pack module 200 is defined as a third direction (e.g., Figure 5 (Z direction in the middle); the first chamfer 310 is formed between the groove wall and the bottom of the positioning groove 300 along the third direction.

[0081] For example, the first chamfer 310 can be a beveled chamfer or a rounded chamfer.

[0082] For example, the first chamfer 310 may extend continuously from the bottom of the groove to the opening of the groove.

[0083] When the positioning protrusion 400 is inserted into the positioning groove 300, the first chamfer 310 can guide the positioning protrusion 400, which helps to align the positioning protrusion 400 with the positioning groove 300. At the same time, the positioning protrusion 400 and the positioning groove 300 are engaged and connected for limiting, so that the battery cell module 200 can be moved to a preset position in the accommodating space 120.

[0084] like Figure 4 and Figure 5 In some embodiments, the edge of the positioning protrusion 400, which is disposed along a third direction and close to the positioning groove 300, has a second chamfer 410.

[0085] For example, the second chamfer 410 can be a beveled chamfer or a rounded chamfer.

[0086] When the positioning protrusion 400 is inserted into the positioning groove 300, the second chamfer 410 can guide the positioning protrusion 400 so that the positioning protrusion 400 can accurately enter the positioning groove 300, thereby enabling the positioning protrusion 400 and the positioning groove 300 to achieve a matching and limiting connection.

[0087] like Figure 7 and Figure 8 The side plate assembly 220 has an elastic component 260 connected to the surface near the cell stack 210. The elastic component 260 is capable of extending and retracting in the second direction and abutting against the end surface of the cell stack 210.

[0088] For example, the elastic component 260 may include a pusher plate 262 and a second elastic member 261. The pusher plate 262 is spaced apart on the side of the side plate assembly 220 near the cell stack 210, and the second elastic member 261 is connected between the side plate assembly 220 and the pusher plate 262. The second elastic member 261 can extend and retract in a second direction. Under the action of the second elastic member 261, the pusher plate 262 can always remain in contact with the end surface of the cell stack 210.

[0089] For example, the end surface of the cell stack 210 can be the surface of the cell 211, or the surface of the structural layer covering the surface of the cell 211.

[0090] In this embodiment, the stacking direction of the cells 211 in the cell stack 210 is the same as the setting direction of the two side plate groups 220. The two side plate groups 220 can provide tension through the connecting beam 250 and clamp the cell stack 210 with the help of the elastic component 260, so that the cells 211 in the cell stack 210 are kept in a stacked state.

[0091] Meanwhile, as can be seen from the foregoing, the first side plate assembly 220a needs to move along the second direction, and the distance between it and the end surface of the cell stack 210 changes during the movement. To ensure that the first side plate assembly 220a can still apply a clamping force to the cell stack 210 during the movement, an elastic component 260 is provided between the first side plate assembly 220a and the cell stack 210. When the first side plate assembly 220a approaches the end surface of the cell stack 210, the elastic component 260 can retract to provide movement space for the first side plate assembly 220a; and when the first side plate assembly 220a moves away from the end surface of the cell stack 210, the elastic component 260 can extend to maintain the force applied to the end surface of the cell stack 210.

[0092] like Figure 2 In some embodiments, the cell assembly module 200 further includes a battery management system, which includes multiple slave control boards mounted on the side panel assembly 220 and electrically connected to the corresponding cell stack 210.

[0093] For example, the control panel and side panel assembly 220 can be connected by adhesive, snap-fit ​​or bolt.

[0094] For example, the slave control board connected to the side panel assembly 220 can correspond one-to-one with the cell stack 210.

[0095] The slave control board is electrically connected to multiple cells 211 in the corresponding cell stack 210, enabling it to collect voltage and temperature data of each connected cell 211 and perform real-time monitoring. The slave control board can also communicate with the main control board in the battery management system, allowing it to send data to or receive control commands from the main control board.

[0096] The slave control board is connected to the side plate assembly 220, which can fix the slave control board in a preset position and form a reliable connection with the battery cell 211 and / or other devices. In this embodiment, it eliminates the need for a separate fixing bracket for the slave control board in the battery cell module 200, which helps improve the internal space utilization of the battery cell module 200 and increase the energy density of the battery pack.

[0097] like Figure 2 In some embodiments, cell 211 includes a pouch cell.

[0098] The two side plate assemblies 220 can clamp the multiple cells 211 stacked in the cell stack 210. Even if the cell 211 is a soft-pack cell, the multiple soft-pack cells in the cell stack 210 can be kept stacked, which is convenient for assembly and transportation.

[0099] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0100] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0101] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0102] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0103] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0104] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery pack, characterized in that, include: The enclosure includes multiple side panels, which together form an accommodating space. A battery cell assembly module is disposed within the accommodating space; the battery cell assembly module includes multiple battery cell stacks, multiple connecting beams, and two side plate assemblies; the multiple battery cell stacks are arranged along a first direction, and each battery cell stack includes multiple battery cells stacked along a second direction; the connecting beams are arranged at both ends of each battery cell stack along the first direction; the two side plate assemblies are located on both sides of the battery cell stack along the second direction, and the two side plate assemblies are connected and clamped to the battery cell stack by the connecting beams; Along the second direction, the distance between the two side panel groups is adjustable so that the two side panel groups can respectively cooperate with and limit the position of their respective corresponding side box panels.

2. The battery pack according to claim 1, characterized in that, Along the second direction, at least one of the side plate assemblies is movable relative to the connecting beam.

3. The battery pack according to claim 2, characterized in that, The movable side plate assembly is defined as the first side plate assembly, which is slidably connected to the end of the corresponding connecting beam, and a first elastic element is connected between the first side plate assembly and the end of the corresponding connecting beam.

4. The battery pack according to claim 3, characterized in that, The battery cell module includes a beam adjusting fastener that passes through the first side plate assembly. One end of the beam adjusting fastener is connected to the end of the connecting beam, and the other end is able to abut against the surface of the first side plate assembly away from the connecting beam. The first elastic element is fitted onto the beam adjusting fastener.

5. The battery pack according to claim 3 or 4, characterized in that, A guide groove is formed on one side wall of the first side plate assembly near the connecting beam, and the end of the connecting beam can be inserted into the guide groove.

6. The battery pack according to claim 1, characterized in that, One of the side panel and the corresponding side panel group is provided with a positioning groove, and the other is provided with a positioning protrusion. The positioning protrusion engages with the positioning groove for positioning and limiting.

7. The battery pack according to claim 6, characterized in that, The positioning groove is disposed on the surface of the side panel assembly near the side box panel, and the positioning groove extends from one end of the side panel assembly to the other end along the first direction; the positioning protrusion is disposed on the surface of the side box panel near the side panel assembly, and the positioning protrusion extends from one end of the side box panel to the other end along the first direction.

8. The battery pack according to claim 6, characterized in that, The height direction of the battery cell module is defined as the third direction; A first chamfer is formed between the groove wall and the groove bottom along the third direction of the positioning groove; and / or, The positioning protrusion is positioned along the third direction and has a second chamfer on its edge near the positioning groove.

9. The battery pack according to claim 1, characterized in that, The side plate assembly is connected to an elastic component near the cell stack, the elastic component being able to extend and retract along the second direction and abut against the end surface of the cell stack.

10. The battery pack according to claim 1, characterized in that, The cell assembly module also includes a battery management system, which includes multiple slave control boards. The slave control boards are mounted on the side panel assembly and are electrically connected to the corresponding cell stack.

11. The battery pack according to claim 1, characterized in that, The battery cells include pouch cells.

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