Battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and an electric device, the battery pack comprises a box body and a cover plate, the box body is provided with an accommodating cavity; the battery pack comprises a plurality of single batteries, and each single battery is provided with a top cover and a pole; the isolation plate and the busbar are arranged in the containing cavity, the cover plate, the busbar, the isolation plate and the top cover are sequentially arranged in the Z direction, the pole is electrically connected with the busbar, and a first gap is formed between the isolation plate and the top cover; the isolation plate is provided with a first through hole communicated with the first gap; the busbar is provided with a through hole, and the position of the through hole corresponds to the position of the first through hole in the Z direction. During glue injection, glue flows into the first gap between the isolation plate and the top cover through the through hole and the first through hole, so that the first gap is filled with the glue, the bonding effect between the isolation plate and the battery is enhanced, reliable bonding between the battery and the isolation plate is ensured, and the structural strength and the structural stability of the whole battery pack are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery pack and electric device. BACKGROUND

[0002] The battery pack refers to the collection of a plurality of single batteries, which can achieve higher capacity, better safety and more stable performance. The battery pack is widely used in electric vehicles, energy storage systems, portable electronic products and other fields.

[0003] The battery pack usually includes a box body and single batteries, and the single battery is the core component of the battery pack, responsible for storing and releasing electrical energy. The single battery is arranged in the box body, which can protect the internal components from the external environment, provide mechanical protection and dustproof and waterproof functions.

[0004] At present, the internal battery can be fixed by pouring glue inside the box body. In the process, the battery is installed first, and then the glue is poured. To ensure the overall fixing effect of the glue after pouring, the ideal state is that all the gaps can be filled with glue. However, due to the complexity and relatively inner position of some areas, it is difficult to fill the glue, for example, in the integrated busbar (English abbreviation: CCS) component part, due to the complex structure and small distance between the single batteries, there are many gaps between the CCS component and the single battery, the glue cannot flow to the gap, and thus the glue cannot be filled, which affects the overall structural stability and bonding effect. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a battery pack and an electric device to solve the problem of poor overall structural stability of the battery pack caused by the glue unable to flow to the gap between the CCS component and the battery.

[0006] In the first aspect, the utility model provides a battery pack with a Z direction, which comprises a box body and a cover plate, the box body is provided with a containing cavity, and the cover plate is arranged on the box body and closes the containing cavity; a battery pack is arranged in the containing cavity, and the battery pack comprises a plurality of single batteries, the single battery has a top cover and a pole, and the pole is arranged on the top cover; a partition plate and a busbar are arranged in the containing cavity, along the Z direction, the cover plate, the busbar, the partition plate and the top cover are sequentially arranged, the pole is electrically connected with the busbar, and a first gap is formed between the partition plate and the top cover; the partition plate is provided with a first through hole, the first through hole penetrates the partition plate along the Z direction, and the first through hole is communicated with the first gap; the busbar is provided with a perforation, the perforation penetrates the busbar in the Z direction, and the position of the perforation corresponds to the position of the first through hole in the Z direction, so that the perforation can be communicated with the first gap through the first through hole.

[0007] Beneficial effects: the pole on the top cover is connected with the busbar, the first gap exists between the isolation plate and the top cover, the first through hole is arranged on the isolation plate and communicated with the first gap, and the through hole is arranged on the busbar, so that the glue can flow into the first gap through the through hole and the first through hole when the glue is injected, the first gap is filled with the glue, the bonding effect between the isolation plate and the battery can be improved, the bonding between the battery and the isolation plate is reliable, and the structural strength and stability of the whole battery pack are improved.

[0008] In an optional embodiment, the isolation plate is further provided with a second through hole penetrating the isolation plate along the Z direction, the second through hole is communicated with the first gap, and the orthogonal projection of the second through hole is spaced from the orthogonal projection of the busbar in the plane perpendicular to the Z direction.

[0009] Beneficial effects: when the glue is injected, the glue can not only flow into the first gap through the through hole and the first through hole, but also directly flow into the first gap through the second through hole, so that the flow rate of the glue during injection can be accelerated, and the injection efficiency can be improved; and the glue can be covered through the second through hole in the area outside the busbar, so that the areas are bonded by the glue.

[0010] In an optional embodiment, the isolation plate has a first surface facing the cover plate, the first surface is provided with a groove, the groove has a groove opening facing one side of the busbar, the groove has a groove bottom wall, the first through hole is arranged on the groove bottom wall, and the busbar is arranged in the groove.

[0011] Beneficial effects: the groove is used for assembling and positioning the busbar, in the assembling process, the isolation plate is aligned with the pole and placed on the battery pack, then the busbar is placed in the groove, and the busbar is positioned by the groove, so that the busbar, the isolation plate and the pole are prevented from being misaligned and affecting the welding quality in the later period, and the welding quality in the later period is ensured.

[0012] In an optional embodiment, a plurality of busbars are arranged, a plurality of grooves are arranged and spaced, and a part of the isolation plate between adjacent grooves forms a first rib, the first rib is provided with a second through hole penetrating the first rib along the Z direction, and the second through hole is communicated with the first gap.

[0013] Beneficial effects: when the glue is injected, the glue can not only reach the first gap through the through hole and the first through hole, but also reach the first gap through the second through hole, so that the glue has multiple paths, and the corresponding gap area of the busbar and the corresponding gap area of the first rib can be filled with the glue through different paths, so that the coverage of the glue is improved, and the structural stability and strength of the battery pack are further improved.

[0014] In an alternative embodiment, the groove further has a groove sidewall connected with the groove bottom wall, the groove sidewall is provided with a third through hole, the third through hole is arranged through the groove sidewall, and the third through hole can communicate the groove with the first gap.

[0015] Beneficial effects: When injecting glue, part of the glue passes through the perforation and reaches the first gap through the first through hole, another part of the glue reaches the first gap through the second through hole, and still another part of the glue reaches the first gap through the third through hole, not only making the glue reach the first gap between the top cover and the isolation plate through a multi-channel path, accelerating the injection speed and improving the injection efficiency, but also making the glue reach different areas of the first gap, making the bonding more reliable.

[0016] In an alternative embodiment, the groove sidewall extends along the Z direction, the isolation plate further has a second surface facing the top cover, the busbar has a third surface facing the cover plate, along the Z direction, the groove bottom wall is sunken on the side facing the top cover relative to the second surface, and the third surface is located on the side facing the top cover of the second surface; the third through hole is arranged through the thickness direction of the groove sidewall, and the third through hole has a first edge, along the Z direction, the first edge is located between the third surface and the cover plate, so that the groove can communicate with the first gap.

[0017] Beneficial effects: The first edge is arranged between the third surface and the cover plate, ensuring that the glue can flow into the first gap through the third through hole when injecting glue.

[0018] In an alternative embodiment, the battery pack further has an X direction and a Y direction, the X direction, the Y direction and the Z direction intersect with each other; the isolation plate is further provided with a window, the window is arranged through the isolation plate along the Z direction; the window is provided with a plurality of openings and is arranged in intervals along the X direction, the groove is provided with a plurality of openings and is arranged in intervals along the X direction, and the window and the groove are arranged in intervals along the Y direction; part of the top cover is exposed through the window, and the part of the isolation plate between adjacent windows forms a second rib, the second rib extends along the Y direction, the second rib is provided with a flow guide groove on the side facing the top cover in the Z direction, the flow guide groove extends along the X direction, and the flow guide groove communicates two adjacent windows.

[0019] Beneficial effects: When injecting glue through the window, the bottom of the second rib is in close contact with the top cover, glue can exist between the top cover and the second rib through the flow guide groove, and better coverage of the glue is achieved.

[0020] In an alternative embodiment, along the Z direction, the second rib is sunken on the side facing the top cover relative to the first surface; the second rib further has a body portion and a protruding portion protruding towards the cover plate, the protruding portion is connected with the body portion, the protruding portion is lower than the first surface in the direction facing the cover plate, and the flow guide groove is arranged on the side of the protruding portion facing the top cover.

[0021] Beneficial effects: The flow guide groove is formed on the side of the protruding portion facing the top cover, facilitating processing and manufacturing, and reducing manufacturing difficulty.

[0022] In an alternative embodiment, the first through hole is provided with a plurality of and is arranged at intervals, and the through hole is arranged one-to-one with the first through hole; and / or, the flow guide groove is provided with a plurality of and is arranged at intervals along the Y direction.

[0023] Beneficial effects: the glue injection speed can be improved by the plurality of first through holes, through holes and flow guide grooves, the glue injection efficiency is higher, and the production efficiency of the battery pack is improved.

[0024] In an alternative embodiment, the battery pack further comprises a glue body, which is arranged at least in the through hole, the first through hole and the first gap.

[0025] Beneficial effects: by arranging the glue body, the busbar, the isolation plate and the top cover are bonded together along the through hole and through the first through hole to the first gap, and the structural stability is higher.

[0026] In a second aspect, the utility model also provides a kind of electric device, comprising the battery pack as described above. DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows, and it is obvious that the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 It is a perspective view of the battery pack of the utility model embodiment;

[0029] Figure 2 It is a perspective view of the battery pack of the utility model embodiment; Figure 1 It is a perspective view of the battery pack of the utility model embodiment;

[0030] Figure 3 It is a perspective view of the battery pack of the utility model embodiment; Figure 2 It is a perspective view of the battery pack of the utility model embodiment;

[0031] Figure 4 It is a perspective view of the battery pack of the utility model embodiment; Figure 3 It is a perspective view of the battery pack of the utility model embodiment;

[0032] Figure 5 It is a perspective view of the battery pack of the utility model embodiment; Figure 2 It is a perspective view of the battery pack of the utility model embodiment;

[0033] Figure 6 It is a perspective view of the battery pack of the utility model embodiment; Figure 5 It is a local enlarged schematic view of A in the utility model;

[0034] Figure 7 It is a local enlarged schematic view of A in the utility model;Figure 5 A front view of the battery pack shown in FIG. 1;

[0035] Figure 8 A front view of the battery pack shown in FIG. 1; Figure 7 A front view of the battery pack shown in FIG. 1;

[0036] Figure 9 A front view of the battery pack shown in FIG. 1; Figure 2 An exploded view of the isolation plate and busbar of the battery pack shown in FIG. 1;

[0037] Figure 10 A front view of the battery pack shown in FIG. 1; Figure 9 A front view of the battery pack shown in FIG. 1;

[0038] Figure 11 A front view of the battery pack shown in FIG. 1; Figure 10 A front view of the battery pack shown in FIG. 1;

[0039] Figure 12 A front view of the battery pack shown in FIG. 1; Figure 10 A front view of the battery pack shown in FIG. 1;

[0040] Figure 13 A front view of the battery pack shown in FIG. 1; Figure 3 A front view of the battery pack shown in FIG. 1.

[0041] BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 1. box; 101, accommodating cavity;

[0043] 2. cover plate;

[0044] 3. battery pack; 301, single cell; 3011, top cover; 3012, pole;

[0045] 4. isolation plate; 401, first through hole; 402, second through hole; 403, third through hole; 4031, first edge; 404, first surface; 405, groove; 4051, groove bottom wall; 4052, groove side wall; 406, first rib; 407, second surface; 408, window; 409, second rib; 410, flow guide groove; 411, protrusion; 412, positioning column; 413, third rib;

[0046] 5. busbar; 501, through hole; 502, third surface; 503, positioning hole;

[0047] 601, first gap; 602, second gap;

[0048] 7. side plate;

[0049] 8. sealing strip;

[0050] 9. structural adhesive layer. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0052] The embodiments of the utility model will be described below in combination with Figures 1 to 13

[0053] According to the embodiments of the utility model, a battery pack is provided, having a Z direction, the battery pack comprising: a box body 1, a cover plate 2, a partition plate 4 and a busbar 5, the box body 1 is provided with a containing cavity 101, the cover plate 2 is provided on the box body 1 and closes the containing cavity 101; a battery pack 3 is provided in the containing cavity 101, the battery pack 3 comprises a plurality of single batteries 301, the single battery 301 has a top cover 3011 and a pole 3012, the pole 3012 is provided on the top cover 3011; the partition plate 4 and the busbar 5 are both provided in the containing cavity 101, along the Z direction, the cover plate 2, the busbar 5, the partition plate 4 and the top cover 3011 are sequentially arranged, the pole 3012 is electrically connected with the busbar 5, and a first gap 601 is formed between the partition plate 4 and the top cover 3011; the partition plate 4 is provided with a first through hole 401, the first through hole 401 penetrates the partition plate 4 along the Z direction, and the first through hole 401 is communicated with the first gap 601; the busbar 5 is provided with a perforation 501, the perforation 501 penetrates the busbar 5 in the Z direction, and the position of the perforation 501 corresponds to the position of the first through hole 401 in the Z direction, so that the perforation 501 can be communicated with the first gap 601 through the first through hole 401.

[0054] The battery pack of the embodiment is applied, the pole 3012 on the top cover 3011 is connected with the busbar 5 (for example, the pole 3012 can be connected with the busbar 5 through the partition plate 4, or the busbar 5 is provided with a protruding structure, and the protruding structure is connected with the pole 3012 through the partition plate 4), the first gap 601 exists between the partition plate 4 and the top cover 3011, the first through hole 401 communicated with the first gap 601 is formed on the partition plate 4, and the perforation 501 is formed on the busbar 5, when glue is injected, the glue can flow into the first gap 601 between the partition plate 4 and the top cover 3011 through the perforation 501 and the first through hole 401, so that the first gap 601 is filled with the glue, the adhesion effect between the partition plate 4 and the battery can be enhanced, the adhesion between the battery and the partition plate 4 is reliable, and then the structural strength and structural stability of the whole battery pack are improved. It can be understood that the perforation 501 and the first through hole 401 are equivalent to glue filling channels.

[0055] ​Further, the first gap 601 is filled with a gel, and the gel can also be a heat-conducting medium with heat-conducting function, so as to transfer the heat generated by the battery to the heat management system of the battery pack, thereby effectively dissipating heat.

[0056] Preferably, the gel is preferably foamed glue, which has the advantages of light weight, good insulation performance, excellent heat conduction performance, stress concentration reduction, and mechanical stability improvement.

[0057] In the Z direction, the cover plate 2, the busbar 5, the isolation plate 4, and the top cover 3011 are sequentially arranged, the through hole 501 is formed on the busbar 5, the first through hole 401 is formed on the isolation plate 4, the through hole 501 and the first through hole 401 correspond in the Z direction, so as to realize the purpose that the gel finally reaches the first gap 601.

[0058] In one embodiment, as shown in Figures 9 to 11 The isolation plate 4 is also provided with a second through hole 402, the second through hole 402 penetrates the isolation plate 4 in the Z direction, the second through hole 402 communicates with the first gap 601, and in the plane perpendicular to the Z direction, the orthographic projection of the second through hole 402 is spaced apart from the orthographic projection of the busbar 5. The second through hole 402 is arranged at a position of the isolation plate 4 other than the position where the busbar 5 is arranged, and the second through hole 402 is also a glue injection hole. When injecting the glue, the gel can not only flow into the first gap 601 through the through hole 501 and the first through hole 401, but also flow into the first gap 601 directly through the second through hole 402. This not only accelerates the flow rate of the gel during glue injection and improves the glue injection efficiency, but also enables the gel to cover the area other than the busbar 5 through the second through hole 402, so that the different areas are bonded by the gel.

[0059] It can be understood that in another embodiment, the second through hole 402 can also not be arranged.

[0060] In the related art, a window needs to be formed on the isolation plate at a position corresponding to the busbar, the busbar is arranged on one side of the window, and the other side of the window is aligned with the pole. During assembly, the busbar, the isolation plate, and the pole are prone to misalignment when being aligned, thereby affecting the welding quality in the later stage.

[0061] In order to solve the above problems, in one embodiment, as shown in Figures 9 to 11As shown, the isolation plate 4 has a first surface 404 facing the cover plate 2, the first surface 404 is provided with a groove 405, the groove 405 has a groove bottom wall 4051, the first through hole 401 is arranged on the groove bottom wall 4051, and the busbar 5 is arranged in the groove 405. The groove 405 is used for assembly positioning of the busbar 5. In the assembly process, the isolation plate 4 is first aligned with the pole 3012 and placed on the battery pack 3, and then the busbar 5 is placed in the groove 405. The groove 405 is used for positioning of a periphery of the busbar 5, which prevents misalignment of the busbar 5, the isolation plate 4 and the pole 3012 during alignment, thereby ensuring the welding quality in the later stage.

[0062] In order to further improve the positioning reliability between the busbar 5 and the isolation plate 4, the isolation plate 4 is provided with a positioning column 412, and the busbar 5 is provided with a positioning hole 503 matched with the positioning column 412, or the busbar 5 is provided with the positioning column 412, and the isolation plate 4 is provided with the positioning hole 503 matched with the positioning column 412. When the busbar 5 is assembled, the positioning hole 503 or the positioning column 412 of the busbar 5 is directly aligned with the positioning column 412 or the positioning hole 503 of the isolation plate 4, and then the busbar 5 is placed in the groove 405 to realize accurate positioning of the busbar 5. The cooperation of the positioning column 412 and the positioning hole 503 can ensure the accurate position of the busbar 5 relative to the isolation plate 4, thereby improving the welding quality in the later stage.

[0063] It should be noted that the positioning hole 503 can be arranged at a corner or a middle part or other positions of the busbar 5, and the arrangement position of the positioning hole 503 can be set according to specific conditions and is not limited thereto.

[0064] It can be understood that in another embodiment, the busbar 5 is provided with a positioning protrusion on a side edge of a groove side wall 4052 facing the groove 405, and the groove side wall 4052 is provided with a positioning groove penetrating through the first surface 404 in the Z direction, or the busbar 5 is provided with a positioning groove on a side edge of the groove side wall 4052 facing the groove 405, and the groove side wall 4052 is provided with a positioning protrusion protruding towards the busbar 5.

[0065] It can be understood that in another embodiment, the groove 405 can not be arranged, and the busbar 5 is directly fixed on the surface of the isolation plate 4 facing the cover plate 2.

[0066] In one embodiment, as Figures 9 to 11As shown, the busbars 5 are provided with a plurality of recesses 405 which are arranged at intervals. The part of the isolation plate 4 between adjacent recesses 405 forms a first rib 406. The first rib 406 is provided with a second through hole 402 which penetrates the first rib 406 along the Z direction and is in communication with the first gap 601. When the glue is injected, the glue can not only reach the first gap 601 through the perforations 501 and the first through hole 401, but also reach the first gap 601 through the second through hole 402, so that the glue injection has multiple paths, and the corresponding gap area of the busbar 5 and the corresponding gap area of the first rib 406 can also be filled with glue through different paths, thereby improving the coverage of the glue injection and further improving the structural stability and strength of the battery pack.

[0067] It can be understood that in another embodiment, the second through hole 402 can also be arranged at other positions of the isolation plate 4. For example, the isolation plate 4 is provided with a window 408. The part of the isolation plate 4 between the window 408 and the recess 405 forms a third rib 413. The third rib 413 is provided with a second through hole 402.

[0068] It can be understood that the first rib 406 and the third rib 413 can be part of the isolation plate 4 or part arranged on the isolation plate 4. Preferably, the isolation plate 4 is obtained by extrusion molding to form a plurality of recesses 405. The first rib 406 is formed between adjacent recesses 405. The third rib 413 is formed at the position of the groove edge of the plurality of recesses 405.

[0069] In one embodiment, as shown in Figure 11 The recess 405 also has a groove side wall 4052 which is connected with the groove bottom wall 4051. The groove side wall 4052 is provided with a third through hole 403 which penetrates the groove side wall 4052. The third through hole 403 can make the recess 405 and the first gap 601 in communication. When the glue is injected, part of the glue reaches the first gap 601 through the perforations 501 and the first through hole 401. Another part of the glue reaches the first gap 601 through the second through hole 402. Still another part of the glue reaches the first gap 601 through the third through hole 403. Not only can the glue reach the first gap 601 between the top cover 3011 and the isolation plate 4 through multiple paths, but also the injection speed and efficiency can be improved. Moreover, the glue can reach different areas of the first gap 601, so that the adhesion is more reliable.

[0070] It can be understood that in another embodiment, the third through hole 403 can also not be arranged.

[0071] In one embodiment, as shown in Figures 9 to 12As shown, the groove side wall 4052 extends along the Z direction, the isolation plate 4 further has a second surface 407 facing the top cover 3011, the busbar 5 has a third surface 502 facing the cover plate 2 along the Z direction, the groove bottom wall 4051 is recessed on the side of the top cover 3011 relative to the second surface 407, and the third surface 502 is located on the side of the top cover 3011 of the second surface 407; the third through hole 403 is provided through the thickness direction of the groove side wall 4052, and the third through hole 403 has a first edge 4031 located between the third surface 502 and the cover plate 2 along the Z direction, so that the groove 405 can communicate with the first gap 601. By arranging the first edge 4031 between the third surface 502 and the cover plate 2, it is ensured that the glue can flow into the first gap 601 through the third through hole 403 during glue injection.

[0072] The groove bottom wall 4051 is recessed on the side of the top cover 3011 relative to the second surface 407, so that the groove bottom wall 4051 is closer to the top cover 3011 than the second surface 407 in the Z direction, and there is a height difference between the groove bottom wall 4051 and the second surface 407 in the Z direction, and the third through hole 403 is provided in the height range to enable the third through hole 403 to communicate the groove 405 and the first gap 601 between the second surface 407 and the top cover 3011. Since the busbar 5 is also arranged in the groove 405, the busbar 5 cannot block the third through hole 403, so that the third surface 502 of the busbar 5 is closer to the top cover than the second surface 407, that is, the third surface 502 of the busbar 5 is lower than the second surface 407 in the Z direction, so that the groove side wall 4052 is not completely blocked by the busbar 5 in the height direction, and the first edge 4031 of the third through hole 403 is located above the third surface 502, thereby ensuring that the third through hole 403 can communicate the first gap 601 on the side of the cover plate 2 of the isolation plate 4 and the side away from the cover plate 2.

[0073] In one embodiment, as shown, Figures 9 to 11 The battery pack further has an X direction and a Y direction, and the X direction, the Y direction and the Z direction intersect with each other; the isolation plate 4 further has a window 408 provided through the isolation plate 4 along the Z direction; the window 408 is arranged in a plurality of and spaced along the X direction, and the groove 405 is arranged in a plurality of and spaced along the X direction, and the window 408 and the groove 405 are spaced along the Y direction. A part of the top cover 3011 is exposed through the window 408, and the part of the isolation plate 4 between adjacent windows 408 forms a second rib 409 extending along the Y direction, and the second rib 409 is provided with a flow guide groove 410 on the side facing the top cover 3011 in the Z direction, the flow guide groove 410 extends along the X direction, and the flow guide groove 410 communicates two adjacent windows 408.

[0074] The groove 405 area where the busbar 5 is located is filled with glue through the perforation 501 and the first through hole 401, the second through hole 402, etc. The glue in this part cannot reach the window 408 area, so the second rib 409 in the window 408 area is provided with a flow guide groove 410. When the glue is injected through the window 408, the lower side of the second rib 409 is in close contact with the top cover 3011, and the flow guide groove 410 is in communication with the two adjacent windows 408, so that the glue can exist between the top cover 3011 and the second rib 409, and the glue can be better covered.

[0075] In one embodiment, as shown in the drawings, Figures 9 to 11 In the Z direction, the second rib 409 is sunken towards the side of the top cover 3011 relative to the first surface 404; the second rib 409 also has a body part and a protruding part 411 protruding towards the cover plate 2, the protruding part 411 is connected with the body part, and in the direction towards the cover plate 2, the protruding part 411 is lower than the first surface 404, and the flow guide groove 410 is arranged on the side of the protruding part 411 towards the top cover 3011. The flow guide groove 410 is formed on the side of the protruding part 411 towards the top cover 3011, which is convenient for processing and manufacturing and reduces the manufacturing difficulty.

[0076] In one embodiment, the protruding part 411 is provided with a plurality of protruding parts 411 which are arranged at intervals along the Y direction.

[0077] It can be understood that in another embodiment, the second rib 409 is not sunken towards the side of the top cover 3011 relative to the first surface 404, and a fourth through hole is directly formed on the second rib 409 to inject glue into the first gap 601 between the second rib 409 and the top cover 3011.

[0078] In one embodiment, the first through hole 401 is provided with a plurality of first through holes 401 which are arranged at intervals, and the perforation 501 is arranged one-to-one corresponding to the first through hole 401; the flow guide groove 410 is provided with a plurality of flow guide grooves 410 which are arranged at intervals along the Y direction. The plurality of first through holes 401, the perforation 501 and the flow guide groove 410 can all improve the glue injection speed, and the glue injection efficiency is higher, thereby improving the production efficiency of the battery pack.

[0079] In one embodiment, as shown in the drawings, Figure 3 The battery pack 3 is provided with a plurality of battery packs 3 which are arranged along the Y direction, and the battery pack further includes a plurality of side plates 7, the side plate 7 is arranged between the two adjacent battery packs 3 along the Y direction, and the second gap 602 is formed between the side plate 7 and the isolation plate 4, and the second gap 602 is in communication with the first gap 601.

[0080] The glue is also filled between the side plate 7 and the isolation plate 4 to bond the side plate 7 and the isolation plate 4 together, further ensuring that the isolation plate 4 is fixed more firmly and reliably, thereby ensuring that the battery and the isolation plate 4 are reliably bonded, and improving the structural strength and stability of the entire battery pack.

[0081] Further, as shown in Figure 8 , Figure 12 and Figure 13 , along the Z direction, the distance from the surface of the isolation plate 4 to the second surface 407 of the top cover 3011 is H1, and the distance from the surface of the isolation plate 4 to the second surface 407 of the side plate 7 is H2, H1 < H2. When the gel is filled between the side plate 7 and the isolation plate 4, due to H1 < H2, the gel also connects the two adjacent battery packs 3, improves the bonding strength of the two adjacent battery packs 3, and improves the mechanical stability; prevents displacement of the battery inside the battery pack 3, helps to ensure that the electrical connection between the batteries remains stable, and reduces the problem of poor contact caused by battery displacement; the gel has good electrical insulation performance, can prevent short circuit between batteries, improve the overall electrical safety of the battery pack 3, and reduce the risk of short circuit and other electrical faults.

[0082] In one embodiment, along the Z direction, the position of the perforation 501 corresponds to the position of the side plate 7 in the first direction along the Z direction. When the gel is injected, the gel flows into the side plate 7 along the first through hole 401 and the perforation 501, and after filling the gap between the two battery packs 3 above the side plate 7, it will flow to the first gap 601 between the top cover 3011 and the isolation plate 4, continue to fill the first gap 601 between the top cover 3011 and the isolation plate 4, and ensure that the first gap 601 and the second gap 602 can be filled with gel, thereby improving the injection effect.

[0083] In one embodiment, the first through hole 401 forms a profile on the first surface 404 in one or more of a polygon, a circle, and an ellipse, the second through hole 402 forms a profile on the third surface 502 in one or more of a polygon, a circle, and an ellipse, and the third through hole 403 forms a profile on the groove side wall 4052 in one or more of a polygon, a circle, and an ellipse. Preferably, the polygon is a rectangle.

[0084] It can be understood that in another embodiment, the shapes of the first through hole 401, the second through hole 402, and the third through hole 403 can also be irregular shapes.

[0085] In one embodiment, along the Z direction, the hole diameters of the first through hole 401 and the second through hole 402 gradually increase or are the same, and along the direction perpendicular to the groove side wall 4052, the hole diameter of the third through hole 403 gradually increases or is the same.

[0086] In one embodiment, the battery pack further comprises a gel disposed at least in the perforations 501, the first through holes 401 and the first gaps 601. By disposing the gel, the busbars 5, the isolation plates 4 and the top cover 3011 are bonded together along the perforations 501 and through the first through holes 401 to the first gaps 601, and the structural stability is higher. Of course, in other embodiments, the gel is also disposed in the second through holes 402, the third through holes 403, the flow guide grooves 410 and the like, which will not be described again.

[0087] In one embodiment, as shown in Figures 4 to 6 the battery pack further comprises a structural adhesive layer 9 and a plurality of sealing strips 8, the structural adhesive layer 9 is bonded between the side plates 7 and the battery groups 3, and the sealing strips 8 are arranged at both ends of the side plates 7 along the Z direction and are arranged on both sides of the side plates 7 along the Y direction, the sealing strips 8 are in contact with the battery groups 3, and the structural adhesive layer 9 is arranged in the space surrounded by the sealing strips 8, the side plates 7 and the battery groups 3.

[0088] When the gel is injected between the side plates 7 and the battery groups 3, the sealing strips 8 make the gel flow in the cavity, avoid the gel flowing out from the top and bottom between the battery groups 3 and the side plates 7, and prevent the gel from leaking, so that the gel can be uniformly filled between the side plates 7 and the battery groups 3, and the sealing strips 8 above can divide the space between the side plates 7 and the battery groups 3 into two spaces, and the two spaces will not affect each other when the gel is injected respectively.

[0089] According to the embodiments of the utility model, on the other hand, a kind of electric device is further provided, comprising the battery pack as described above.

[0090] Specifically, the electric device can be the device needing battery pack to supply power in prior art, such as electric vehicle, electric bicycle and the like, by the above-mentioned battery pack, the assembly of the electric device is facilitated, and the safety performance of the electric device is also improved.

[0091] Although the embodiments of the utility model have been described in conjunction with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having a Z-direction, characterized by, The battery pack comprises: a box (1) provided with a containing cavity (101), and a cover plate (2) covering the box (1) and closing the containing cavity (101); a battery pack (3) provided in the containing cavity (101), the battery pack (3) comprising a plurality of single batteries (301), the single battery (301) having a top cover (3011) and a pole (3012) provided on the top cover (3011); a separation plate (4) and a busbar (5), both of which are provided in the containing cavity (101), and along the Z direction, the cover plate (2), the busbar (5), the separation plate (4) and the top cover (3011) are sequentially arranged, the pole (3012) is electrically connected with the busbar (5), and a first gap (601) is formed between the separation plate (4) and the top cover (3011). The separation plate (4) is provided with a first through hole (401) penetrating the separation plate (4) along the Z direction, the first through hole (401) is in communication with the first gap (601); the busbar (5) is provided with a perforation (501) penetrating the busbar (5) in the Z direction, and the position of the perforation (501) corresponds to the position of the first through hole (401) in the Z direction, so that the perforation (501) can communicate with the first gap (601) through the first through hole (401).

2. The battery pack of claim 1, wherein, The separation plate (4) is further provided with a second through hole (402) penetrating the separation plate (4) along the Z direction, the second through hole (402) is in communication with the first gap (601), and in a plane perpendicular to the Z direction, the orthographic projection of the second through hole (402) is spaced apart from the orthographic projection of the busbar (5).

3. The battery pack of claim 1, wherein, The separation plate (4) has a first surface (404) facing the cover plate (2), the first surface (404) is provided with a groove (405), the groove (405) has a groove bottom wall (4051), the first through hole (401) is arranged on the groove bottom wall (4051), and the busbar (5) is arranged in the groove (405).

4. The battery pack of claim 3, wherein, The busbar (5) is provided with a plurality of grooves (405) which are spaced apart; a part of the separation plate (4) between adjacent grooves (405) forms a first rib portion (406), the first rib portion (406) is provided with a second through hole (402) penetrating the first rib portion (406) along the Z direction, and the second through hole (402) is in communication with the first gap (601).

5. The battery pack of claim 3, wherein, The groove (405) also has a groove side wall (4052) connected with the groove bottom wall (4051), the groove side wall (4052) is provided with a third through hole (403), the third through hole (403) is arranged through the groove side wall (4052), and the third through hole (403) can communicate the groove (405) and the first gap (601).

6. The battery pack of claim 5, wherein, The groove side wall (4052) extends along the Z direction, the isolation plate (4) also has a second surface (407) facing the top cover (3011), the busbar (5) has a third surface (502) facing the cover plate (2), along the Z direction, the groove bottom wall (4051) is sunken to one side of the top cover (3011) relative to the second surface (407), and the third surface (502) is located on one side of the second surface (407) facing the top cover (3011); the third through hole (403) is arranged through the thickness direction of the groove side wall (4052), and the third through hole (403) has a first edge (4031), along the Z direction, the first edge (4031) is located between the third surface (502) and the cover plate (2), so that the groove (405) can communicate with the first gap (601).

7. The battery pack of any one of claims 3-6, wherein, The battery pack also has an X direction and a Y direction, the X direction, the Y direction and the Z direction intersect with each other; the isolation plate (4) is also provided with a window (408), the window (408) is arranged through the isolation plate (4) along the Z direction; the window (408) is provided with a plurality of and is arranged at intervals along the X direction, the groove (405) is provided with a plurality of and is arranged at intervals along the X direction, and the window (408) and the groove (405) are arranged at intervals along the Y direction; Part of the top cover (3011) is exposed through the window (408), part of the isolation plate (4) between adjacent windows (408) forms a second rib (409), the second rib (409) extends along the Y direction, the second rib (409) is provided with a flow guide groove (410) on one side of the Z direction facing the top cover (3011), the flow guide groove (410) extends along the X direction, and the flow guide groove (410) communicates two adjacent windows (408).

8. The battery pack of claim 7, wherein, In the Z direction, the second rib (409) is sunken to one side of the top cover (3011) relative to the first surface (404); the second rib (409) also has a body part and a protruding part (411) protruding towards the cover plate (2), the protruding part (411) is connected with the body part, in the direction facing the cover plate (2), the protruding part (411) is lower than the first surface (404), and the flow guide groove (410) is arranged on one side of the protruding part (411) facing the top cover (3011).

9. The battery pack of claim 7, wherein, The first through holes (401) are provided in plurality and are arranged at intervals, and the perforations (501) are arranged one-to-one corresponding to the first through holes (401); and / or, the flow guide grooves (410) are provided in plurality and are arranged at intervals along the Y direction.

10. The battery pack of claim 1, wherein, The battery pack further comprises a gel, which is arranged at least in the perforations (501), the first through holes (401) and the first gaps (601).

11. An electrical device, characterized by A battery pack comprising any one of the features of claims 1 to 10.

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