Battery pack and electric device

Abstract

This invention relates to the field of battery technology and discloses a battery pack and power supply device, including a support plate, a cooling cylinder, a battery, and a ring-shaped fastener. The battery is installed in the cooling cylinder, and the outer peripheral wall of the battery is in contact with the inner wall of the cooling cylinder. The support plate is provided with a positioning groove, and the cooling cylinder is positioned and installed in the positioning groove. Fastening slots are respectively provided on opposite sides of the positioning groove. The two opposite ends of the ring-shaped fastener are respectively fastened to the two fastening slots, and the ring-shaped fastener clamps the cooling cylinder. The battery pack and power supply device of this invention can effectively increase the cooling effect on the battery and also effectively improve the assembly efficiency of the battery pack.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery pack and an electrical device. Background Technology

[0002] Current battery packs consist of several cylindrical cells and multiple cooling plates. The cylindrical cells are positioned between two adjacent cooling plates, and the heat generated by the cylindrical cells can be transferred to the outside through the cooling plates.

[0003] Currently, the cooling plates are mounted on the bottom plate of the battery box via fixing slots, and the cooling plates are fixed to the bottom plate with multiple bolts. On the one hand, the battery is placed between two cooling plates, the contact area between the battery and the cooling plates is small, the volume of the cooling plates is large, and the cooling effect is poor. On the other hand, when installing the battery pack, multiple bolts are needed to fix the cooling plates, resulting in poor assembly efficiency of the battery pack.

[0004] Therefore, it is necessary to design a battery pack and power supply device that can effectively increase the cooling effect on the battery and also effectively improve the assembly efficiency of the battery pack. Summary of the Invention

[0005] The purpose of this invention is to provide a battery pack and an electrical device that can effectively increase the cooling effect on the battery and also effectively improve the assembly efficiency of the battery pack.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery pack includes a carrier plate, a cooling cylinder, a battery, and a ring-shaped fastener;

[0008] The battery is installed in the cooling cylinder, and the outer peripheral wall of the battery is in contact with the inner wall of the cooling cylinder;

[0009] The support plate is provided with a positioning groove, and the cooling cylinder is positioned and installed in the positioning groove. The two opposite sides of the positioning groove are respectively provided with snap-fit ​​grooves. The two opposite ends of the circumferential snap-fit ​​component are respectively snap-fit ​​connected to the two snap-fit ​​grooves, and the circumferential snap-fit ​​component clamps the cooling cylinder.

[0010] Optionally, the cooling cylinder includes a first sleeve and a second sleeve disposed in the first sleeve;

[0011] A cooling channel is formed between the first sleeve and the second sleeve. The cooling channel includes a plurality of branch channels, and two adjacent branch channels are separated from each other by a branch strip.

[0012] One side of the diverter bar is sealed to the inner wall of the first sleeve near the second sleeve, and the other side is sealed to the outer wall of the second sleeve near the first sleeve.

[0013] Optionally, a first flow collecting section and a second flow collecting section are further provided between the first sleeve and the second sleeve;

[0014] The first flow collector section and the second flow collector section are respectively located at opposite ends of the cooling channel, and the first flow collector section, the cooling channel and the second flow collector section are connected in sequence.

[0015] Optionally, the battery pack further includes an inlet pipe and an outlet pipe, the inlet pipe being connected to the first collector section and the outlet pipe being connected to the second collector section;

[0016] Both ends of the cooling cylinder are provided with annular sealing blocks. One annular sealing block seals the end of the first flow collecting section away from the cooling channel, and the other annular sealing block seals the end of the second flow collecting section away from the cooling channel. Optionally, a plurality of positioning grooves are arranged at intervals on the support plate, and each positioning groove is provided with a cooling cylinder.

[0017] Each of the cooling cylinders is connected to the water inlet pipe, and each of the cooling cylinders is connected to the water outlet pipe.

[0018] Optionally, the circumferential buckle includes a first arm, a connecting arm, and a second arm connected in sequence, with a buckle protrusion at the end of the first arm away from the connecting arm, and a buckle protrusion at the end of the second arm away from the connecting arm.

[0019] When the ring-shaped fastener tightens the cooling cylinder, the first arm, the connecting arm, and the second arm all abut against the outer peripheral wall of the cooling cylinder.

[0020] Optionally, the snap-fit ​​groove between two adjacent positioning grooves has an inverted T-shape in cross-section perpendicular to the extending direction of the cooling cylinder;

[0021] The first arm of one of the ring-shaped fasteners and the second arm of another ring-shaped fastener extend into the same inverted T-shaped fastening groove, and adjacent ring-shaped fasteners abut against each other.

[0022] Optionally, the battery pack also includes a data acquisition component and a battery pack assembly;

[0023] The battery assembly includes a connecting battery tab connected to the end of the battery and a snap-fit ​​battery tab that snaps into the connecting battery tab.

[0024] The acquisition component includes an acquisition board and a connecting nickel plate, which is connected to the snap-fit ​​bar.

[0025] Optionally, the snap-fit ​​bar is provided with a snap-fit ​​groove for snapping into the connecting bar;

[0026] When the connecting bar is inserted into the snap-fit ​​groove, a plug-in hole is formed between the connecting bar and the snap-fit ​​bar for the connecting nickel plate to be inserted, and the plug-in hole is formed on both opposite sides of the connecting bar;

[0027] The connecting nickel plate includes a first insertion post and a second insertion post. The first insertion post is inserted into one of the insertion holes, and the second insertion post is inserted into the other insertion hole. The first insertion post and the second insertion post elastically clamp the connecting plate.

[0028] Optionally, the connector has a connecting surface facing the acquisition plate;

[0029] The connecting nickel sheet is wavy, with one end fixedly connected to the acquisition plate and the other end elastically pressed against the connecting surface to conduct the connection of the snap-fit ​​plate.

[0030] An electrical device includes a battery pack as described in any of the preceding claims.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] In this embodiment, the battery is installed in the cooling cylinder and the outer peripheral wall of the battery fits into the inner bore of the cooling cylinder. This effectively increases the contact area between the battery and the cooling cylinder, resulting in better heat exchange and improved cooling effect for the battery. In addition, the cooling cylinder can be quickly positioned and clamped by the ring-shaped fastener and the positioning groove of the support plate. The battery can be fixed without tightening multiple bolts, which can improve the assembly efficiency of the battery pack. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0035] Figure 1This is a schematic diagram of the battery pack installation structure provided in an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A top view of the battery pack mounting structure;

[0037] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section;

[0038] Figure 4 for Figure 3 An enlarged view of position A in the middle;

[0039] Figure 5 for Figure 2 An enlarged view of position B in the middle;

[0040] Figure 6 This is a side view of a battery pack provided in an embodiment of the present invention;

[0041] Figure 7 This is a front view schematic diagram of the cooling cylinder provided in an embodiment of the present invention;

[0042] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the middle BB section;

[0043] Figure 9 This is a schematic diagram of the battery pack installation structure provided in an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of another battery pack mounting structure provided in an embodiment of the present invention;

[0045] Figure 11 for Figure 10 An enlarged view of position C in the middle;

[0046] Figure 12 An exploded view of the cooling cylinder, connecting plate, and annular sealing block provided in an embodiment of the present invention;

[0047] Figure 13 This is a structural schematic diagram of the ring-type fastener provided in an embodiment of the present invention.

[0048] Illustrations: 1. Support plate; 11. Positioning groove; 12. Snap-fit ​​groove; 2. Cooling cylinder; 21. First sleeve; 22. Second sleeve; 23. Diverter bar; 201. Diverter channel; 202. Annular sealing block; 2001. First collector section; 2002. Second collector section; 3. Battery; 4. Circumferential snap-fit ​​component; 41. First arm body; 42. Connecting arm; 43. Second arm body; 401. Snap-fit ​​protrusion; 51. Water inlet pipe; 52. Water outlet pipe; 6. Collection component; 61. Collection plate; 62. Connecting nickel plate; 621. First insertion post; 622. Second insertion post; 7. Bar assembly; 71. Connecting bar; 72. Snap-fit ​​bar; 721. Snap-fit ​​groove; 722. Insertion hole; 73. Connecting surface. Detailed Implementation

[0049] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0050] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0051] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0052] Example 1

[0053] This invention provides a battery pack that not only simplifies battery packaging but also improves the cooling effect of the battery 3 within the battery pack and enhances the installation efficiency of the battery pack.

[0054] It should be noted that current battery packs generally cool the batteries through cooling plates. However, since the cooling plates can only cool one side of the battery, the temperature of the other parts of the battery that are not in contact with the cooling plates is relatively high, resulting in poor cooling effect and the possibility of local overheating. In addition, the battery is generally sandwiched between two cooling plates, which are usually installed on the bottom plate of the battery box with multiple bolts. The installation of the cooling plates is also relatively complicated and requires a long time to tighten the bolts.

[0055] Please see Figures 1 to 8 , Figure 13 This embodiment discloses a battery pack, which includes a support plate 1, a cooling cylinder 2, a battery 3, and a ring-shaped fastener 4. The support plate 1 provides support, the cooling cylinder 2 is used to position and cool the battery 3, and the ring-shaped fastener 4 is used to fix the cooling cylinder 2 to the support plate 1.

[0056] The battery 3 is installed in the cooling cylinder 2, and the outer peripheral wall of the battery 3 is in contact with the inner cylinder wall of the cooling cylinder 2; the outer circumference of the battery 3 can contact the cooling cylinder 2, thereby improving the cooling effect of the battery 3. It should also be noted that the battery 3 can be a cylindrical battery or a square battery, and the cross-section of the inner hole of the cooling cylinder 2 can be circular, square, or other shapes that match the battery.

[0057] The support plate 1 is provided with a positioning groove 11, and the cooling cylinder 2 is positioned and installed in the positioning groove 11. On opposite sides of the positioning groove 11 are respectively provided snap-fit ​​slots 12. The two opposite ends of the circumferential snap-fit ​​component 4 are respectively snapped into the two snap-fit ​​slots 12, and the circumferential snap-fit ​​component 4 clamps the cooling cylinder 2. The positioning groove 11 allows the cooling cylinder 2 to be quickly and accurately installed in the designated position, and the clamping snap-fit ​​component 4 clamps the cooling cylinder 2, thus completing the rapid installation of the cooling cylinder 2. In this embodiment, the assembly of the battery pack reduces the repetitive work of tightening bolts, making assembly simpler and faster. Furthermore, the cooperation between the circumferential snap-fit ​​component 4 and the positioning groove 11 makes the positioning of the cooling cylinder 2 more accurate and the installation precision higher, which also improves the installation precision of the battery 3 to a certain extent.

[0058] Optionally, the cooling cylinder 2 includes a first sleeve 21 and a second sleeve 22 disposed within the first sleeve 21; a cooling flow channel is formed between the first sleeve 21 and the second sleeve 22, and the cooling flow channel includes several branch channels 201, with adjacent branch channels 201 separated from each other by a branching strip 23. One side of the branching strip 23 is sealed to the inner wall of the first sleeve 21 near the second sleeve 22, and the other side is sealed to the outer wall of the second sleeve 22 near the first sleeve 21. The presence of several branch channels 201 prevents the heat exchange medium in each branch channel 201 from flowing into each other, thus ensuring a greater degree of heat exchange effect in each area and making the cooling effect more uniform. Furthermore, the center lines of the first sleeve 21 and the second sleeve 22 coincide, ensuring that the height of each branch channel 201 is consistent and that the flow rate of each branch channel 201 is essentially the same. It should also be noted that at least three branch channels 201 are provided. Preferably, the flow channel 201 is spirally arranged around the center line of the cooling cylinder 2, which can further improve the cooling uniformity.

[0059] Optionally, a first collector section 2001 and a second collector section 2002 are further provided between the first sleeve 21 and the second sleeve 22; the first collector section 2001 and the second collector section 2002 are respectively located at opposite ends of the cooling channel, and the first collector section 2001, the cooling channel and the second collector section 2002 are sequentially connected. Specifically, the heat exchange medium first enters the first collector section 2001, the first collector section 2001 connects to each branch channel 201 and supplies heat exchange medium to each branch channel 201, the heat exchange medium flows through each branch channel 201 and converges to the second collector section and flows out.

[0060] Optionally, the battery pack also includes an inlet pipe 51 and an outlet pipe 52, with the inlet pipe 51 connected to the first collector section 2001 and the outlet pipe 52 connected to the second collector section 2002 of the outlet channel; annular sealing blocks 202 are provided at both opposite ends of the cooling cylinder 2, such as... Figure 8 and Figure 12 One annular sealing block 202 seals the end of the first collector section 2001 that is far from the cooling channel, and the other annular sealing block 202 seals the end of the second collector section that is far from the cooling channel. The inlet pipe 51 and the outlet pipe 52 are respectively connected to the opposite ends of the cooling cylinder 2. The section of the cooling cylinder 2 between the inlet pipe 51 and the outlet pipe 52 can have a good heat absorption effect, which can further increase the heat exchange area of ​​the cooling cylinder 2, thereby improving the cooling effect.

[0061] Optionally, a plurality of positioning grooves 11 are arranged at intervals on the support plate 1, and a cooling cylinder 2 is provided in each positioning groove 11; each cooling cylinder 2 is connected to a water inlet pipe 51 and each cooling cylinder 2 is connected to a water outlet pipe 52.

[0062] Specifically, a typical battery pack includes multiple batteries 3. Therefore, each battery 3 arranged in this manner can be cooled by a cooling cylinder 2, effectively preventing localized overheating of any particular battery 3. It should also be noted that multiple batteries 3 can be connected in series within a single cooling cylinder 2.

[0063] Optionally, the ring-shaped fastener 4 includes a first arm 41, a connecting arm 42, and a second arm 43 connected end to end in sequence. The first arm 41 is provided with a fastening protrusion 401 at the end away from the connecting arm 42, and the second arm 43 is provided with a fastening protrusion 401 at the end away from the connecting arm 42. The ring-shaped fastener 4 can be in the shape of a door, an inverted U, an inverted V, or other shapes that can clamp the cooling cylinder 2.

[0064] When the ring-type buckle 4 clamps the cooling cylinder 2, the first arm 41, the connecting arm 42, and the second arm 43 all abut against the outer peripheral wall of the cooling cylinder 2, thereby preventing the cooling cylinder 2 from shifting relative to the bearing plate 1 and allowing the battery 3 to be fixed in a suitable position.

[0065] Optionally, the snap-fit ​​groove 12 between two adjacent positioning grooves 11 has an inverted T-shape in cross-section perpendicular to the extending direction of the cooling cylinder 2. The first arm 41 of one circumferential snap-fit ​​member 4 and the second arm 43 of another circumferential snap-fit ​​member 4 extend into the same inverted T-shaped snap-fit ​​groove 12, and adjacent circumferential snap-fit ​​members 4 abut against each other. Figure 4 As shown, two adjacent ring-shaped fasteners 4 abut against each other, so that both ring-shaped fasteners 4 can stably maintain the fastened state, preventing the ring-shaped fasteners 4 from loosening and improving the fastening effect.

[0066] Optionally, the battery pack also includes a data acquisition component 6 and a contact plate assembly 7. The contact plate assembly 7 includes a connecting contact plate 71 connected to the end of the battery 3 and a snap-fit ​​contact plate 72 that snaps into the connecting contact plate 71. The snap-fit ​​connection between the connecting contact plate 71 and the snap-fit ​​contact plate 72 achieves a conductive connection, thereby avoiding the welding process and further simplifying the installation of the battery pack. The data acquisition component 6 includes a data acquisition plate 61 and a connecting nickel plate 62, which connects to the snap-fit ​​contact plate 72.

[0067] Optionally, such as Figure 2 and Figure 5As shown, the snap-fit ​​bar 72 is provided with a snap-fit ​​groove 721 for snapping with the connecting bar 71; when the connecting bar 71 is inserted into the snap-fit ​​groove 721, an insertion hole 722 for the connecting nickel plate 62 to be inserted is formed between the connecting bar 71 and the snap-fit ​​bar 72, and insertion holes 722 are formed on both opposite sides of the connecting bar 71; the connecting nickel plate 62 includes a first insertion post 621 and a second insertion post 622, the first insertion post 621 is inserted into one insertion hole 722, the second insertion post 622 is inserted into the other insertion hole 722, and the first insertion post 621 and the second insertion post 622 elastically clamp the connecting bar 71. In this embodiment, the first plug-in post 621 is inserted into one plug-in hole 722, and the second plug-in post 622 is inserted into another plug-in hole 722. This ensures the connection stability between the nickel sheet 62 and the bar assembly 7, and there is no need for welding between the nickel sheet 62 and the bar assembly 7. This further reduces the difficulty of assembly and helps to improve assembly efficiency.

[0068] Optionally, such as Figures 9 to 11 As shown, the snap-fit ​​bar 72 has a connecting surface 73 facing the acquisition plate 61; the connecting nickel strip 62 is wavy, with one end fixedly connected to the acquisition plate 61, and the other end elastically pressed against the connecting surface 73 to conduct the snap-fit ​​bar 72. In this embodiment, the connection between the acquisition plate 61 and the bar assembly 7 is achieved by the elastic pressing of the connecting nickel strip 62, avoiding the welding connection between the connecting nickel strip 62 and the bar assembly 7.

[0069] Example 2

[0070] This embodiment discloses an electrical device, including the battery pack described in Embodiment 1.

[0071] Electrical equipment can include cars, mobile phones, portable devices, laptops, ships, spacecraft, medical equipment, electric toys, and power tools, etc.

[0072] Among them, automobiles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; medical equipment can be various testing equipment; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0075] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack, characterized by, Includes a support plate (1), a cooling cylinder (2), a battery (3), and a ring-shaped fastener (4); The battery (3) is installed in the cooling cylinder (2), and the outer peripheral wall of the battery (3) is in contact with the inner cylinder wall of the cooling cylinder (2); The bearing plate (1) is provided with a positioning groove (11), and the cooling cylinder (2) is positioned and installed in the positioning groove (11). The positioning groove (11) is provided with snap-fit ​​grooves (12) on opposite sides. The two ends of the ring-type snap-fit ​​member (4) are snap-fitted to the two snap-fit ​​grooves (12) respectively, and the ring-type snap-fit ​​member (4) clamps the cooling cylinder (2). The cooling cylinder (2) includes a first sleeve (21) and a second sleeve (22) disposed in the first sleeve (21); A cooling channel is formed between the first sleeve (21) and the second sleeve (22), the cooling channel including a plurality of branch channels (201), and two adjacent branch channels (201) are separated from each other by a branch strip (23); A first collection section (2001) and a second collection section (2002) are also provided between the first sleeve (21) and the second sleeve (22). The first flow collector section (2001) and the second flow collector section (2002) are respectively located at opposite ends of the cooling channel, and the first flow collector section (2001), the cooling channel, and the second flow collector section (2002) are connected sequentially; The ring-shaped buckle (4) includes a first arm (41), a connecting arm (42), and a second arm (43) connected in sequence. The first arm (41) has a buckle protrusion (401) at one end away from the connecting arm (42), and the second arm (43) has a buckle protrusion (401) at one end away from the connecting arm (42). When the ring-shaped buckle (4) clamps the cooling cylinder (2), the first arm (41), the connecting arm (42), and the second arm (43) all abut against the outer peripheral wall of the cooling cylinder (2); The snap-fit ​​groove (12) between two adjacent positioning grooves (11) has an inverted T-shaped cross section perpendicular to the extending direction of the cooling cylinder (2); The first arm (41) of one of the ring-type fasteners (4) and the second arm (43) of the other ring-type fastener (4) extend into the same inverted T-shaped fastener groove (12), and the two adjacent ring-type fasteners (4) abut against each other.

2. The battery pack according to claim 1, characterized in that, One side of the diverter bar (23) is sealed to the inner wall of the first sleeve (21) near the second sleeve (22), and the other side is sealed to the outer wall of the second sleeve (22) near the first sleeve (21).

3. The battery pack of claim 1, wherein, It also includes an inlet pipe (51) and an outlet pipe (52), wherein the inlet pipe (51) is connected to the first collection section (2001) and the outlet pipe (52) is connected to the second collection section (2002). Both ends of the cooling cylinder (2) are provided with annular sealing blocks (202), one of the annular sealing blocks (202) seals the end of the first collecting section (2001) away from the cooling channel, and the other annular sealing block (202) seals the end of the second collecting section away from the cooling channel.

4. The battery pack of claim 3, wherein, The bearing plate (1) is provided with a plurality of positioning grooves (11) arranged at intervals, and each positioning groove (11) is provided with a cooling cylinder (2). Each of the cooling cylinders (2) is connected to the water inlet pipe (51), and each of the cooling cylinders (2) is connected to the water outlet pipe (52).

5. The battery pack of claim 1, wherein, It also includes a data acquisition component (6) and a scalp extract component (7); The bar assembly (7) includes a connecting bar (71) connected to the end of the battery (3) and a snap-fit ​​bar (72) snapped into the connecting bar (71). The acquisition component (6) includes an acquisition board (61) and a connecting nickel plate (62), the connecting nickel plate (62) being connected to the snap-fit ​​plate (72).

6. The battery pack of claim 5, wherein, The snap-fit ​​bar (72) is provided with a snap-fit ​​groove (721) for snapping with the connecting bar (71). When the connecting bar (71) is inserted into the snap-fit ​​groove (721), a plug hole (722) is formed between the connecting bar (71) and the snap-fit ​​bar (72) for the connecting nickel plate (62) to be inserted, and the plug hole (722) is formed on both opposite sides of the connecting bar (71). The connecting nickel plate (62) includes a first plug-in portion (621) and a second plug-in portion (622). The first plug-in portion (621) is inserted into one of the plug-in holes (722), and the second plug-in portion (622) is inserted into the other plug-in hole (722). The first plug-in portion (621) and the second plug-in portion (622) elastically clamp the connecting plate (71).

7. The battery pack of claim 5, wherein, The card connector (72) has a connection surface (73) facing the acquisition plate (61); The connecting nickel sheet (62) is wavy. One end of the connecting nickel sheet (62) is fixedly connected to the acquisition plate (61), and the other end is elastically pressed against the connecting surface (73) to conduct the connection of the snap-fit ​​plate (72).

8. An electrical device, characterized by It includes a battery pack as described in any one of claims 1 to 7.

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