Battery pack and electric equipment
By adopting a design in which the reinforcement part overlaps the heat management components in the battery pack, multiple battery cells are connected and distributed at the ends, the problem of ignoring thermal management in the prior art is solved, and the safety and lightweight are taken into account.
Patent Information
- Application Number
- CN202422039626.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The existing battery pack ignores the protection of the thermal management system when strengthening the structure, resulting in an intensified heat spread and affecting the safety of the battery pack.
The reinforcement part overlaps the heat management parts, and multiple battery cells are connected through the reinforcement parts, which not only strengthens the battery pack structure, but also protects the heat management parts. The reinforcement parts are arranged dispersed at the ends of the battery cells to reduce weight.
It improves the overall safety and structural strength of the battery pack, while meeting the lightweight requirements, enhances the protection of thermal management components, and improves the mechanical properties of the battery pack.
Smart Images
Figure CN223206368U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art
[0002] In battery technology, minimizing collision damage to battery cells is a pressing technical challenge. Currently, to mitigate collision damage to battery cells, the battery pack structure is typically reinforced. However, these reinforcements often overlook the protection of the thermal management system within the battery pack. Damage to the thermal management system can exacerbate heat spread, compromising battery pack safety. Utility Model Content
[0003] The purpose of the present invention is to provide a battery pack and an electrical device, so as to meet the lightweight requirements of the battery pack while strengthening the battery pack structure.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] One aspect of the present invention is to provide a battery pack having a first direction, a second direction, and a third direction intersecting in pairs, the battery pack comprising:
[0006] A plurality of battery cells having a first wall and a second wall opposite to each other in the first direction, wherein the plurality of battery cells are arranged along the first direction;
[0007] a heat management component, the heat management component being disposed between two adjacent battery cells and connected to the first wall and / or the second wall;
[0008] There are multiple reinforcement members, each of which is arranged at one end of the battery cell in the third direction and connects multiple battery cells, and the reinforcement member and the thermal management component have a positive projection along the third direction on a plane perpendicular to the third direction that at least partially overlap.
[0009] Another aspect of the present invention is to provide an electrical device comprising the battery pack as described above.
[0010] Compared with the prior art, the battery pack and electrical equipment of the present invention have the following advantages:
[0011] The battery pack of the embodiment of the utility model includes a thermal management component, multiple reinforcement members and multiple battery cells. There are multiple battery cells and reinforcement members. The reinforcement member is provided at the end of the battery cell in the third direction, and the reinforcement member at least partially overlaps with the positive projection of the thermal management component along the third direction. The reinforcement member connects multiple battery cells so that the multiple battery cells form a whole. It can not only strengthen the overall structure of the battery pack and improve the battery pack modality, but also the reinforcement member overlapping with the thermal management component can absorb part of the impact force, and can also strengthen the part of the thermal management component with weaker structural strength in the battery pack. In addition, since the reinforcement member is provided at the end of the battery cell, the multiple reinforcement members are dispersed in the battery pack. The multiple battery cells and thermal management components in the battery pack are structurally reinforced by the multiple reinforcement members, thereby strengthening the overall structure of the battery pack, and then fully protecting the thermal management components and battery cells, thereby improving the overall safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 1 ;
[0013] Figure 2 yes Figure 1 A schematic side view of the battery pack shown in FIG.
[0014] Figure 3 This is a schematic diagram of the front structure of a battery cell in an embodiment of the present utility model;
[0015] Figure 4 yes Figure 3 Schematic diagram of the back structure of the battery cell shown in;
[0016] Figure 5 This is a schematic structural diagram of another battery cell in an embodiment of the present utility model;
[0017] Figure 6 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 2 ;
[0018] Figure 7 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 3 ;
[0019] Figure 8 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 4 ;
[0020] Figure 9 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 5 ;
[0021] Figure 10This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 6 ;
[0022] Figure 11 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 7 ;
[0023] Figure 12 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 8 ;
[0024] Figure 13 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 9 ;
[0025] Figure 14 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 ;
[0026] Figure 15 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 one;
[0027] Figure 16 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 two;
[0028] Figure 17 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 three;
[0029] Figure 18 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 Four;
[0030] Figure 19 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 five;
[0031] Figure 20 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 six;
[0032] Figure 21 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 seven;
[0033] Figure 22 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 eight;
[0034] Figure 23 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 10 Nine;
[0035] Figure 24 yes Figure 23 A front view of the battery pack shown in ;
[0036] Figure 25 yes Figure 24 A partial enlarged schematic diagram of part A;
[0037] Figure 26 yes Figure 23 A schematic diagram of the structure of the isolation member in the battery pack shown in FIG;
[0038] Figure 27 is a schematic diagram of the main view of the isolation member;
[0039] Figure 28 is a schematic top view of the isolation member;
[0040] Figure 29 is a schematic side view of a spacer;
[0041] Figure 30 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 2 ten;
[0042] Figure 31 yes Figure 30 A schematic side view of the battery pack shown in FIG.
[0043] Figure 32 yes Figure 30 Schematic diagram of the connection between the middle reinforcement and the thermal management component Figure 1 ;
[0044] Figure 33 yes Figure 30 Schematic diagram of the connection between the middle reinforcement and the thermal management component Figure 2 ;
[0045] Figure 34 yes Figure 30 Schematic diagram of the connection between the middle reinforcement and the thermal management component Figure 3 ;
[0046] Figure 35 yes Figure 30 Schematic diagram of the connection between the middle reinforcement and the thermal management component Figure 4 ;
[0047] Figure 36 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 2 eleven;
[0048] Figure 37 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 2 twelve;
[0049] Figure 38This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 2 Thirteen;
[0050] Figure 39 This is a schematic diagram of the structure of the battery pack described in the embodiment of the utility model Figure 2 fourteen.
[0051] Numbers in the figure:
[0052] 1. Battery cell, 101. First wall, 102. Second wall, 103. Third wall, 104. Fourth wall, 11. Pressure relief device, 12. Electrode terminal, 2. Thermal management component, 3. Reinforcement member, 31. Recessed portion, 311. First space, 312. Rubber block, 313. Second space, 314. Limiting block, 32. Raised portion, 33. Cavity, 331. Connecting rib, 4. Isolation member, 41. Pressure relief portion, 42. Isolation portion, 5. Frame, 6. Cover plate, 61. Bottom wall, 62. Top wall, 7. Protective plate, X, first direction, Y, second direction, Z, third direction. DETAILED DESCRIPTION
[0053] In the description of this utility model, it should be noted that the terms "center," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0054] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.
[0055] In this application, the term "parallel" includes not only absolute parallelism but also the generally recognized parallelism in engineering practice, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. At the same time, "perpendicular" also includes not only absolute perpendicularity but also the generally recognized perpendicularity in engineering practice, such as "perpendicular" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only absolute equality but also the generally recognized equality in engineering practice, which may include a certain error, such as a tolerance range of -1% to 1%.
[0056] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0057] See Figure 1-Figure 2 、 Figures 6-18 、 Figure 25 As shown, an embodiment of the present invention provides a battery pack having a first direction X, a second direction Y and a third direction Z that intersect in pairs, the battery pack including a thermal management component 2, a reinforcement 3 and a plurality of battery cells 1, the battery cell 1 having a first wall 101 and a second wall 102 oppositely arranged in the first direction X, and the plurality of battery cells 1 are arranged along the first direction X; the thermal management component 2 is arranged between two adjacent battery cells 1, and the thermal management component 2 is connected to the first wall 101 and the second wall 102, and the thermal management component 2 can also be connected to only one of the first wall 101 and the second wall 102; there are multiple reinforcements 3, the reinforcement 3 is arranged at one end of the battery cell 1 in the third direction Z and connects the plurality of battery cells 1, and the reinforcement 3 and the thermal management component 2 along the third direction Z on a plane perpendicular to the third direction Z at least partially overlap.
[0058] The reinforcement 3 connects the multiple battery cells 1, forming a single unit. This not only strengthens the battery pack as a whole and improves its modal properties, but also, by overlapping the reinforcement 3 with the thermal management component 2, it absorbs some of the impact force and reinforces the portion of the thermal management component 2 within the battery pack where the structural strength is weaker. Furthermore, since the reinforcement 3 is located at the ends of the battery cells 1, multiple reinforcements 3 are dispersed throughout the battery pack. These reinforcements 3 provide structural reinforcement to the multiple battery cells 1 and thermal management component 2 within the battery pack, thereby strengthening the overall structure of the battery pack. Furthermore, since the reinforcement 3 is dispersed at the ends of the multiple battery cells 1, the separate arrangement of the reinforcements 3 reduces the overall weight of the reinforcement 3, compared to flat reinforcements that adhere to the sidewalls of the multiple battery cells 1, thus meeting the requirements for lightweighting the battery pack.
[0059] In some embodiments, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first direction X is parallel to the width direction of the battery cell 1, the second direction Y is parallel to the length direction of the battery cell 1, and the third direction Z is parallel to the height direction of the battery cell 1.
[0060] See Figure 2 In some embodiments, the reinforcement member 3 is at least partially connected to one end of the battery cell 1 in the third direction Z, and the orthographic projection of the reinforcement member 3 along the third direction Z on a plane perpendicular to the third direction Z overlaps the orthographic projection of the thermal management component 2 along the third direction Z on a plane perpendicular to the third direction Z. The reinforcement member 3 strengthens the structure of the battery cell 1. The reinforcement member 3 and the battery cell 1 can be connected by gluing.
[0061] When the cross-sectional form of the reinforcement 3 is different, the force transmission path of the reinforcement 3 is different when it is hit by a collision, resulting in different mechanical properties of the overall structure of the battery pack. Figures 6-18 As shown, in some embodiments, at least a portion of the surface of the reinforcement 3 is provided with a recessed portion 31, and the recessed portion 31 improves the force transmission path of the reinforcement 3. In some embodiments, at least a portion of the surface of the reinforcement 3 is provided with a raised portion 32, and the force transmission path of the reinforcement 3 is improved by the raised portion 32. In some embodiments, at least a portion of the surface of the reinforcement 3 is provided with a recessed portion 31, and at least a portion of the surface of the reinforcement 3 is provided with a raised portion 32, and the force transmission path of the reinforcement 3 is improved by the combined action of the recessed portion 31 and the raised portion 32. In some embodiments, the recessed portion 31 and the raised portion 32 are respectively integrally formed with the reinforcement 3, and the surface of the reinforcement 3 is recessed toward the interior of the reinforcement 3 to form the recessed portion 31, and the surface of the reinforcement 3 is raised toward the exterior of the reinforcement 3 to form the raised portion 32.
[0062] See Figure 6 As shown, in some embodiments, a recessed portion 31 is provided on the side of the reinforcement member 3 proximate to the battery cell 1. In the first direction X, the recessed portion 31 at least partially extends into the battery cell 1. A first space 311 for filling glue is formed within the recessed portion 31 proximate to the battery cell 1, thereby enhancing the bonding strength between the reinforcement member 3 and the battery cell 1. On the side of the reinforcement member 3 proximate to the battery cell 1, glue blocks 312 are formed on either side of the recessed portion 31 to prevent the glue filling in the first space 311 from overflowing.
[0063] See Figure 7As shown, in some embodiments, a recessed portion 31 is provided on the side of the reinforcement member 3 facing away from the battery cell 1. Stoppers 314 are formed on either side of the recessed portion 31. In the first direction X, the recessed portion 31 at least partially extends into the battery cell 1. A second buffering space 313 is formed within the recessed portion 31 facing away from the battery cell 1. A buffer layer is filled within the second space 313. The buffer layer contains a cushioning material, such as foam, that acts as a buffer to absorb deformation tolerances.
[0064] See Figure 8 As shown, in some embodiments, two opposite side surfaces of the reinforcement member 3 disposed along the first direction X are respectively provided with recessed portions 31. The recessed portions 31 on the opposite side surfaces of the reinforcement member 3 disposed along the first direction X are symmetrically arranged. The orthographic projections of the thermal management component 2 and the recessed portions 31 along the third direction Z on a plane perpendicular to the third direction are offset from each other.
[0065] See Figure 9 and Figure 10 As shown, in some embodiments, a protrusion 32 is provided on the side of the reinforcement member 3 proximal to the battery cell 1. The protrusion 32 extends along the third direction Z between two adjacent battery cells 1 and is connected to the thermal management component 2. The protrusion 32 is planar on the side proximal to the thermal management component 2. Providing the protrusion 32 on the side of the reinforcement member 3 proximal to the battery cell 1 provides support for the thermal management component 2. Providing the protrusion 32 also optimizes the force transmission path of the reinforcement member 3, better facilitating collision response. The protrusion 32 is adhesively bonded to the thermal management component 2.
[0066] See Figure 10 As shown, in some embodiments, the side of the protrusion 32 close to the thermal management component 2 matches the shape of the end of the thermal management component 2, so that the protrusion 32 fits the thermal management component 2 and facilitates the fixation of the protrusion 32 to the thermal management component 2. For example, the side of the protrusion 32 close to the thermal management component 2 and the end of the thermal management component 2 are both arc-shaped.
[0067] See Figure 11 As shown, in some embodiments, a protrusion 32 is provided on each of two opposing side surfaces of the reinforcement member 3 along the first direction X. The protrusions 32 on the two opposing side surfaces of the reinforcement member 3 along the first direction X are symmetrically arranged and have arc-shaped cross-sections. The protrusions 32 formed on both sides of the reinforcement member 3 form energy-absorbing areas, providing a cushioning effect. The arc-shaped protrusions can enhance the cushioning effect.
[0068] See Figure 16As shown, in some embodiments, a recessed portion 31 and a raised portion 32 are provided on the side of the reinforcement 3 close to the battery cell 1, the raised portion 32 extends along the third direction Z to between two adjacent battery cells 1 and is connected to the thermal management component 2, the recessed portion 31 is provided on opposite sides of the raised portion 32 along the first direction X, and the recessed portions 31 are respectively opposite to the two adjacent battery cells 1. While forming a first space 311 for filling with glue and a glue blocking block 312 for blocking glue on the side of the reinforcement 3 close to the battery cell 1, the force transmission path of the overall structure is also optimized.
[0069] See Figure 12-15 As shown, in some embodiments, the reinforcement 3 has a cavity 33 inside, and the inner wall of the cavity 33 is a plane. In some embodiments, the inner wall of the cavity 33 in the reinforcement 3 is a curved surface. In some embodiments, the inner wall of the cavity 33 in the reinforcement 3 includes both a plane inner wall and a curved inner wall. There are one or more cavities 33, and the cross-sectional shape of the cavity 33 can be rectangular, circular, arc-shaped, etc. Multiple cavities 33 are arranged at intervals inside the reinforcement 3. When multiple cavities 33 are provided in the reinforcement 3, the inner walls of each cavity 33 can all be planes or all be curved surfaces, or part of the inner walls can be planes and part of the inner walls can be curved surfaces; and the cross-sectional shapes of the cavities 33 in the same reinforcement 3 can be the same or different. The weight of the reinforcement 3 can be reduced by providing the cavities 33.
[0070] See Figure 17 and Figure 18 As shown, in some embodiments, a connecting rib 331 is provided inside the cavity 33. The connecting rib 331 is connected to at least one inner wall of the cavity 33. The connecting rib 331 can enhance the strength of the reinforcement 3 and improve its impact resistance. In some embodiments, the connecting rib 331 is a flat rib or a curved rib.
[0071] It should be noted that, regarding the structural form of the reinforcement 3, any two of the features of the raised portion 32, the recessed portion 31 provided on the reinforcement 3, and the cavity 33 and the connecting rib 331 provided inside the reinforcement 3 can be combined to form the structure of the reinforcement 3. Figure 17 and Figure 18As shown, in some embodiments, a protrusion 32 is provided on the side of the reinforcement member 3 proximal to the battery cell 1. The protrusion 32 extends along the third direction Z between two adjacent battery cells 1 and is connected to the thermal management component 2. A recess 31 is provided on the side of the reinforcement member 3 distal to the battery cell 1, with stoppers 314 formed on either side of the recess 31. The reinforcement member 3 has a cavity 33 within it, within which a connecting rib 331 is provided. One end of the connecting rib 331 is connected to the protrusion 32, and the other end of the connecting rib 331 is connected to the stopper 314. The connecting rib 331 connects the protrusion 32 to the stopper 314 within the cavity 33, thereby strengthening the connection between the protrusion 32 and the stopper 314, increasing the overall strength of the reinforcement member 3, and improving the force transmission path from the protrusion 32 to the stopper 314. A raised portion 32, a recessed portion 31, a cavity 33 and a connecting rib 331 are simultaneously provided on the reinforcement 3, which not only enhances the support for the thermal management component 2, but also improves the buffering and energy absorption effect, and ensures that the strength of the reinforcement 3 can meet the strengthening effect of the battery cell while reducing the weight.
[0072] There are various ways to arrange the reinforcement member 3 in the battery pack.
[0073] See Figure 19 and Figure 33 As shown, in some embodiments, the reinforcement member 3 is extended along the first direction X, and the reinforcement member 3 connects the plurality of thermal management components 2 .
[0074] See Figure 20 and Figure 34 As shown, in some embodiments, the reinforcement member 3 extends along the second direction Y, and the projection of the reinforcement member 3 along the third direction Z on the end surface of the thermal management component 2 coincides with the end surface of the thermal management component 2. The reinforcement member 3 is connected to the thermal management component 2 by adhesive bonding or welding. The reinforcement member 3 can be a plurality of independent individuals, see Figure 30-Figure 32 As shown, in some embodiments, a plurality of reinforcement members 3 are arranged at intervals along the second direction Y, and the plurality of reinforcement members 3 are connected to the same thermal management component 2 .
[0075] See Figure 21 and Figure 35 As shown, in some embodiments, some reinforcement members 3 are arranged along the first direction X, and some reinforcement members 3 are arranged along the second direction Y, forming a mesh structure. Figure 35 As shown, the gaps between the battery cells 1 can be filled by the reinforcement members 3 with a mesh structure, thereby strengthening the structure of the battery cells 1 in both the first direction X and the second direction Y.
[0076] See Figure 36As shown, in some embodiments, the reinforcement member 3 can be arranged in three parts. The first reinforcement member 3 is provided at one end of the thermal management component 2 along the third direction Z. The reinforcement member 3 extends along the second direction Y, and the projection of the reinforcement member 3 on the end surface of the thermal management component 2 along the third direction Z coincides with the end surface of the thermal management component 2. The second reinforcement member 3 is provided along the first direction X and intersects with the reinforcement member 3 provided at the end of the thermal management component 2 to form a mesh structure. The third reinforcement member 3 is provided at one end of the battery cell 1 along the third direction Z. The reinforcement member 3 extends along the second direction Y, and multiple reinforcement members 3 are arranged along the first direction X. The first reinforcement member 3 and the second reinforcement member 3 form a mesh structure, which is overlapped with the third reinforcement member 3 to enhance the structural reinforcement of the battery cell 1. The connection methods of the mesh structure and the third reinforcement member 3 include, but are not limited to, integral molding, adhesive connection, welding connection, and connection via fasteners.
[0077] In some embodiments, the reinforcement member 3 is a flexible member.
[0078] The battery cell 1 is rectangular, and the first wall 101 and the second wall 102 are parallel to each other, and the first wall 101 and the second wall 102 are perpendicular to the first direction X. Figure 2-Figure 5 As shown, in some embodiments, the battery cell 1 further has a third wall 103 and a fourth wall 104 disposed opposite each other along a third direction Z. The third wall 103 and the fourth wall 104 are parallel to each other and perpendicular to the third direction Z. The battery cell 1 includes a pressure relief device 11, which is disposed on the third wall 103 or the fourth wall 104. In the third direction Z, the reinforcement 3 and the pressure relief device 11 are located on the same side of the battery cell 1. The orthographic projection of the reinforcement 3 along the third direction Z onto a plane perpendicular to the third direction Z is offset from the pressure relief device 11. A pressure relief cavity connected to the pressure relief device 11 is formed between adjacent reinforcements 3. When the pressure within the battery cell 1 increases, the high-pressure gas within the battery cell 1 is discharged into the pressure relief cavity through the pressure relief device 11, preventing the high-pressure gas from contacting other battery cells 1.
[0079] See Figure 2-Figure 5 As shown, in some embodiments, the battery cell 1 further includes an electrode terminal 12, which is disposed on the third wall 103 or the fourth wall 104. In the third direction Z, the reinforcement member 3 and the electrode terminal 12 are located on the same side of the battery cell 1, and the orthographic projection of the reinforcement member 3 along the third direction Z on a plane perpendicular to the third direction Z is staggered with the electrode terminal 12. When the reinforcement member 3 and the electrode terminal 12 are located on different sides of the battery cell 1 in the third direction Z, the orthographic projection of the reinforcement member 3 along the third direction Z on a plane perpendicular to the third direction Z at least partially overlaps or does not overlap with the electrode terminal 12.
[0080] In some embodiments, the pressure relief device 11 and the electrode terminal 12 are disposed on the same wall of the battery cell 1. For example, the pressure relief device 11 and the electrode terminal 12 are both disposed on the third wall 103 of the battery cell 1, or the pressure relief device 11 and the electrode terminal 12 are both disposed on the fourth wall 104 of the battery cell 1. In other embodiments, the pressure relief device 11 and the electrode terminal 12 may also be disposed on two opposite walls of the battery cell 1, for example, one of the pressure relief device 11 and the electrode terminal 12 is disposed on the third wall 103 and the other on the fourth wall 104.
[0081] See Figure 22-Figure 25 As shown, in some embodiments, the battery pack further includes a spacer 4, which is disposed between the reinforcement member 3 and the battery cell 1. The reinforcement member 3 is at least partially connected to the spacer 4. The reinforcement member 3 and the spacer 4 are adhesively connected. The spacer 4 extends along a first direction X and connects multiple battery cells 1. The multiple spacers 4 are arranged along a second direction Y. The reinforcement member 3 extends along the second direction Y and connects multiple spacers 4.
[0082] See Figure 25-29 As shown, in some embodiments, the separator 4 includes a pressure relief portion 41 and a separator 42. The pressure relief portion 41 is located on one side of the separator 42, and the reinforcement 3 is connected to the side of the separator 42 facing away from the battery cell 1. Multiple pressure relief portions 41 are spaced apart along the length of the separator 42, each corresponding to a battery cell 1. The reinforcement 3 is located between two adjacent pressure relief portions 41 and connected to the separator 42. The pressure relief portions 41 form a pressure relief area for the battery cell 1.
[0083] See Figure 36-Figure 39 As shown, in some embodiments, the battery pack further includes a frame 5 and a cover plate 6. The cover plate 6 covers the frame 5 to form a receiving cavity. The battery cell 1 is arranged in the receiving cavity and is spaced apart from the frame 5. The cover plate 6 has a top wall 62. The top wall 62 is located on one side of the frame 5 in the third direction Z. The reinforcement 3 is connected to the side of the top wall 62 of the cover plate 6 facing the frame 5. The reinforcement 3 and the top wall 62 of the cover plate 6 can be integrally formed or separately provided. The cover plate 6 also has a bottom wall 61. The bottom wall 61 is located on the other side of the frame 5 in the third direction Z. The bottom wall 61 and the top wall 62 are spaced apart relative to each other. The bottom wall 61 and the top wall 62 are respectively connected to opposite sides of the frame 5. The bottom wall 61, the top wall 62 and the frame 5 together form a receiving cavity. The battery cell 1 and the reinforcement 3 are both located in the receiving cavity.
[0084] See Figure 36-Figure 39 As shown, in some embodiments, the battery pack further includes a protective plate 7 disposed between the cover plate 6 and the battery cell 1, and the reinforcement member 3 is connected to the protective plate 7. The protective plate 7 is flat. The reinforcement member 3 and the protective plate 7 can be integrally formed or separately provided.
[0085] In some embodiments, both ends of the reinforcement member 3 are respectively connected to the frame 5 , and the connection can be made by welding or by fasteners to improve the stability of the overall structure.
[0086] An embodiment of the present invention further provides an electrical device, comprising the battery pack as described above.
[0087] In summary, the embodiments of the present invention provide a battery pack and electrical equipment that, through the reinforcement member 3, not only reinforces the battery cells 1, but also reinforces the portion of the thermal management component 2 within the battery pack that has weaker structural strength, thereby ensuring the reinforcing effect of the reinforcement member 3. Furthermore, since the reinforcement member 3 is provided at the end of the battery cell 1, multiple reinforcement members 3 are dispersed within the battery pack. The multiple reinforcement members 3 are used to structurally reinforce the multiple battery cells 1 and the thermal management component 2 within the battery pack, thereby strengthening the overall structure of the battery pack. Furthermore, since the reinforcement members 3 are dispersed at the ends of the multiple battery cells 1, compared to flat reinforcement members that are bonded to the side walls of the multiple battery cells 1, the multiple reinforcement members 3 are provided separately, which reduces the overall weight of the reinforcement member and meets the lightweight requirements of the battery pack. By selecting reinforcement members 3 with different cross-sectional forms, the mechanical properties of the battery pack structure can be specifically improved. By providing a cavity within the reinforcement member 3, the weight of the reinforcement member 3 can be reduced, the force transmission path can be improved, and stress concentration on the contact surface of the battery cell 1 can be avoided.
[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.
Claims
1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) intersecting each other, characterized in that: The battery pack includes: A plurality of battery cells (1) having a first wall (101) and a second wall (102) arranged opposite to each other in the first direction (X), wherein the plurality of battery cells (1) are arranged along the first direction (X); a heat management component (2), the heat management component (2) being disposed between two adjacent battery cells (1), and the heat management component (2) being connected to the first wall (101) and / or the second wall (102); A plurality of reinforcing members (3) are provided, wherein the reinforcing members (3) are provided at one end of the battery cell (1) in the third direction (Z) and connect the plurality of battery cells (1), and the orthographic projection of the reinforcing member (3) and the thermal management component (2) along the third direction (Z) on a plane perpendicular to the third direction (Z) at least partially overlap.
2. The battery pack according to claim 1, wherein: The reinforcement (3) is at least partially connected to one end of the battery cell (1) in the third direction (Z), and the orthographic projection of the reinforcement (3) along the third direction (Z) on a plane perpendicular to the third direction (Z) covers the orthographic projection of the thermal management component (2) along the third direction (Z) on a plane perpendicular to the third direction (Z).
3. The battery pack according to claim 1, wherein: At least a portion of the surface of the reinforcement (3) is provided with a recessed portion (31), and / or at least a portion of the surface of the reinforcement (3) is provided with a raised portion (32).
4. The battery pack according to claim 3, wherein: The reinforcement (3) satisfies at least one of the following conditions: Condition 1: The reinforcement (3) is provided with the protrusion (32) on a side close to the battery cell (1), the protrusion (32) extends between two adjacent battery cells (1) along the third direction (Z), and the protrusion (32) is connected to the thermal management component (2); Condition 2: The reinforcing member (3) is provided with the recessed portion (31) and the raised portion (32) on a side close to the battery cell (1); the raised portion (32) extends between two adjacent battery cells (1) along the third direction (Z) and is connected to the thermal management component (2); the recessed portion (31) is provided on two opposite sides of the raised portion (32) along the first direction (X); and the recessed portion (31) is respectively opposite to the two adjacent battery cells (1); Condition 3: The side of the reinforcement member (3) away from the battery cell (1) is provided with the recessed portion (31), and the reinforcement member (3) is formed with limiting blocks (314) on both sides of the recessed portion (31); Condition 4: The two side surfaces of the reinforcement member (3) that are opposite to each other along the first direction (X) are respectively provided with the recessed portions (31); Condition 5: The protrusions (32) are respectively provided on two side surfaces of the reinforcement (3) that are opposite to each other along the first direction (X).
5. The battery pack according to claim 4, characterized in that: The reinforcement (3) satisfies condition 3, a second space (313) is formed in the recessed portion (31), and the second space (313) is filled with a buffer layer.
6. The battery pack according to any one of claims 1 to 5, characterized in that: The reinforcement (3) has a cavity (33) inside, and the inner wall of the cavity (33) is a plane and / or a curved surface.
7. The battery pack according to claim 6, characterized in that: A connecting rib (331) is provided inside the cavity (33), and the connecting rib (331) is connected to at least one inner wall of the cavity (33).
8. The battery pack according to claim 7, characterized in that: The connecting ribs (331) are flat ribs or curved ribs.
9. The battery pack according to claim 1 or 2, characterized in that: The arrangement of the reinforcement member (3) satisfies one of the following conditions: Condition a: the reinforcement member (3) is extended along the second direction (Y), and the orthographic projection of the reinforcement member (3) along the third direction (Z) on the plane where the end face of the thermal management component (2) is located coincides with the end face of the thermal management component (2); Condition b: a plurality of the reinforcing members (3) are arranged at intervals along the second direction (Y), and the plurality of the reinforcing members (3) are connected to the same thermal management component (2); Condition c: the reinforcement member (3) is extended along the first direction (X), and the reinforcement member (3) connects a plurality of the thermal management components (2); Condition d: Part of the reinforcement (3) is arranged along the first direction (X), and part of the reinforcement (3) is arranged along the second direction (Y).
10. The battery pack according to claim 1, wherein: The battery cell (1) further comprises a third wall (103) and a fourth wall (104) arranged opposite to each other along the third direction (Z), and the battery cell (1) comprises a pressure relief device (11), wherein the pressure relief device (11) is arranged on the third wall (103) or the fourth wall (104); In the third direction (Z), the reinforcement (3) and the pressure relief device (11) are located on the same side of the battery cell (1), and the orthographic projections of the reinforcement (3) and the pressure relief device (11) along the third direction (Z) on a plane perpendicular to the third direction (Z) are staggered with each other, and a pressure relief cavity connected to the pressure relief device (11) is formed between adjacent reinforcements (3).
11. The battery pack according to claim 10, characterized in that: The battery cell (1) further comprises an electrode terminal (12), the electrode terminal (12) being arranged on the third wall (103) or the fourth wall (104); in the third direction (Z), the reinforcing member (3) and the electrode terminal (12) are located on the same side of the battery cell (1), and the orthographic projections of the reinforcing member (3) and the electrode terminal (12) along the third direction (Z) on a plane perpendicular to the third direction (Z) are staggered with each other.
12. The battery pack according to claim 1, wherein: The battery pack further comprises an isolating member (4), wherein the isolating member (4) is arranged between the reinforcing member (3) and the battery cell (1), and the reinforcing member (3) is at least partially connected to the isolating member (4).
13. The battery pack according to claim 12, wherein: The isolating member (4) comprises a pressure relief portion (41) and an isolating portion (42); a plurality of the pressure relief portions (41) are arranged at intervals on the isolating portion (42); the pressure relief portions (41) are arranged corresponding to the battery cells (1); and the reinforcing member (3) is arranged between adjacent pressure relief portions (41) and connected to the isolating portion (42).
14. The battery pack according to claim 1, wherein: The battery pack further comprises a frame (5) and a cover plate (6), wherein the cover plate (6) covers the frame (5) to form a receiving cavity, wherein the battery cell (1) is arranged in the receiving cavity and spaced apart from the frame (5), wherein the cover plate (6) has a top wall (62), wherein the top wall (62) is located on one side of the frame (5) in the third direction (Z), and the reinforcement (3) is connected to a side of the top wall (62) of the cover plate (6) facing the frame (5).
15. The battery pack according to claim 14, characterized in that: The battery pack further comprises a protective plate (7) disposed between the cover plate (6) and the battery cell (1), and the reinforcement (3) is connected to the protective plate (7).
16. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-15.