Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a shell; the shell at least partially covers the support, the support is provided with a plurality of sleeves, and the sleeves define a containing cavity; the plurality of battery cells are arranged at intervals along the length direction, the battery cells extend lengthwise along the width direction, and each battery cell is at least partially accommodated in the corresponding accommodating cavity; the adjacent battery cells are electrically connected through the connecting sheets; the enclosure is used for preventing water from flowing to the end face, perpendicular to the width direction, of the sleeve; the fence comprises a first fence, and the first fence protrudes from the top face of the support in the height direction and extends in the length direction; according to the battery pack provided by the invention, the battery cell extending along the width direction is accommodated in the accommodating cavity formed by the bracket of the battery pack, and the enclosure is arranged to prevent water from flowing to the battery cell along the width direction, so that the end part of the battery cell is prevented from being immersed in the water, and the risk of short circuit is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery pack. BACKGROUND

[0002] With the development of science and technology, electric tools become an important kind of living supplies in human life. When the electric tools are used, the battery pack needs to support the power supply of the electric tools.

[0003] The battery pack is usually composed of multiple battery cells. At present, when the battery pack is filled with water, the water cannot be discharged in time, which may cause the battery cells of the battery pack to be immersed in water and short circuit between the multiple battery cells. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application aims to provide a battery pack to solve the problem of short circuit caused by water filling and increase the safety of the battery pack.

[0005] To achieve the above purpose, the present application provides a battery pack, which comprises:

[0006] a shell;

[0007] a support, the shell at least partially covering the support, the support comprising multiple sleeves, the sleeves being enclosed to form accommodation cavities;

[0008] multiple battery cells, which are arranged at intervals along a length direction and extend longitudinally along a width direction, each battery cell being at least partially accommodated in a corresponding accommodation cavity;

[0009] at least one connecting piece, adjacent battery cells being electrically connected through the connecting piece; a barrier, the barrier being used to prevent water from flowing to an end surface of the sleeve perpendicular to the width direction; the barrier comprising a first barrier, the first barrier being protrusively arranged from a top surface of the support along a height direction and extending along the length direction; wherein the height direction is perpendicular to the length direction and the width direction.

[0010] Optionally, the battery pack further comprises a drain hole arranged at a bottom of the battery pack, the drain hole being in communication with the outside; and a drain channel, the drain channel being used to guide the water entering the shell to flow from a space surrounded by the barrier to the drain hole, so that the water is discharged from the battery pack.

[0011] Optionally, the drain channel comprises a first drain channel arranged at least partially at one end of the support along a first direction; and / or the drain hole comprises a first drain hole in communication with the first drain channel, the first drain hole being arranged correspondingly to the first drain channel.

[0012] Optionally, the drainage channel includes a second drainage channel, the sleeve is provided with a protrusion at each end in the axial direction of the battery cell, the protrusion at least partially surrounds the corresponding connecting piece, and the second drainage channel is formed between adjacent protrusions; and / or the drainage hole includes a second drainage hole in communication with the second drainage channel, and the second drainage hole is arranged correspondingly to the second drainage channel.

[0013] Optionally, the battery pack further includes a circuit board supported on the support; and a projection of the circuit board on the support is at least partially located in the space surrounded by the enclosure.

[0014] Optionally, the support is provided with a first support member protruding therefrom, the first support member being configured to support the circuit board such that a first gap is formed between the circuit board and the support.

[0015] Optionally, the housing is provided with a ventilation hole and / or a slot for receiving a terminal of the battery pack, and a projection of the ventilation hole and / or the slot on the support is located in the space surrounded by the enclosure.

[0016] Optionally, the battery pack further includes a circuit board supported on the support; the connecting piece includes a connecting end and a signal end connected to each other, the connecting end being configured to connect to the battery cell and being located at the end face, and the signal end being configured to connect to the circuit board, and the signal end being bent relative to the connecting end; the support is provided with a second support member protruding therefrom in the height direction, the second support member being configured to support the signal end such that a second gap is formed between the signal end and the support.

[0017] Optionally, the enclosure further includes a second enclosure connected to the first enclosure, the second enclosure being provided on the support in the height direction and extending along the width direction, and the second enclosure at least partially surrounds the second gap.

[0018] Optionally, the battery pack further includes a sealing member; the sleeve is provided with a protrusion at each end in the axial direction of the battery cell, the protrusion at least partially surrounds the corresponding connecting piece; the housing includes a side cover covering the two ends of the sleeve; the sealing member is arranged between the side cover and the sleeve; and the side cover is configured to press the sealing member against the protrusion to at least partially seal the connecting piece in the space surrounded by the protrusion.

[0019] As can be seen from the above, the battery pack provided by the application has the following advantages: the support of the battery pack forms a receiving cavity in which the battery cell extending along the width direction is accommodated, and the enclosure prevents water from flowing to the battery cell along the width direction, thereby avoiding the end of the battery cell from being immersed in water and reducing the risk of short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description only embody the embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0021] Figure 1 Structure diagram of the battery pack in an embodiment of the application;

[0022] Figure 2 Structure explosion diagram of the battery pack in an embodiment of the application;

[0023] Figure 3 Partial structure of the battery pack in an embodiment of the application Figure 1 ;

[0024] Figure 4 Partial structure of the battery pack in an embodiment of the application Figure 2 ;

[0025] Figure 5 Detail view of A in FIG. 1; Figure 5

[0026] Partial structure bottom view of the battery pack in an embodiment of the application; Figure 6

[0027] Sectional view schematic of the battery pack in an embodiment of the application Figure 7 ; Figure 1

[0028] Sectional view schematic of the battery pack in an embodiment of the application Figure 8 ; Figure 2

[0029] Partial explosion diagram in an embodiment of the application; Figure 9

[0030] Partial structure of the battery pack in an embodiment of the application Figure 10 ; Figure 3

[0031] Detail view of B in FIG. 1. Figure 11 DETAILED DESCRIPTION Figure 10 In order to make the purposes, technical solutions and advantages of the application clearer, the application will be further described in detail below with reference to specific embodiments and drawings.

[0032] In order to make the purposes, technical solutions and advantages of the application clearer, the application will be further described in detail below with reference to specific embodiments and drawings.

[0033] ​It should be noted that the technical terms or scientific terms used in the embodiments of the present application should be understood as the general meaning understood by those skilled in the art to which the embodiments of the present application belong, unless otherwise defined. The terms "first", "second", and similar terms used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] The battery pack is used to power electrical and electronic devices. The electrical devices can be power tools, household appliances, chargers, adapters, etc. The power tools include but are not limited to lawn mowers, trimmers, chain saws, grass trimmers, cleaning machines, intelligent mowers, intelligent cleaning devices, and sit-on mowers. Household appliances can be vacuum cleaners, hair dryers, electric fans, and camping lights, etc. The electronic devices are mobile phones, laptops, digital cameras, etc. The present application does not limit the devices powered by the battery pack.

[0035] Please refer to Figure 1 and Figure 2 , the battery pack 1 includes a housing 200, a bracket 300, and a battery cell 400 received in the bracket 300, the housing 200 at least partially covers the bracket 300.

[0036] Referring to Figure 2 , the bracket 300 includes a plurality of sleeves 310, the sleeves 310 enclose a receiving cavity 320, and each battery cell 400 is at least partially received in a corresponding receiving cavity 320. Specifically, the sleeve 310 includes an end face 311 located at both ends of the bracket 300 along the width direction Y, and the end face 311 is arranged perpendicular to the axial direction of the battery cell 400. The end face 311 has a mounting hole, and each battery cell 400 is received in the receiving cavity 320 of each sleeve 310 through the mounting hole, and the mounting hole exposes the electrode end of the battery cell 400.

[0037] In some embodiments, the plurality of sleeves 300 are integrally formed. In some embodiments, the sleeve 300 includes an integral insulation wall 305, and the insulation wall 305 wraps the circumferential surface of the battery cell 400. In an embodiment, at least 80% of the circumferential surface of the battery cell 400 is wrapped by the insulation wall 305. In a specific embodiment, the insulation wall 305 wraps the entire circumferential surface of the battery cell 400, which can prevent water from flowing into the receiving cavity 320 through the gap of the insulation wall 305, and prevent the circumferential surface of the battery cell 400 from contacting water.

[0038] In one embodiment, the support may include multiple rows of sleeves arranged along the height direction. In other embodiments, the sleeves may also include two sub-sleeves, which are respectively fitted onto both ends of the battery cell.

[0039] In some embodiments, the sleeve 300 is made of a thermally conductive material to conduct heat from the cell 400 to the outside, facilitating heat dissipation of the battery pack 1. In other embodiments, the sleeve 300 is made of a heat-storing material to absorb heat from the cell 400, preventing thermal overload of the battery pack 1.

[0040] In some embodiments, a plurality of battery cells 400 are spaced apart along the length direction X, and the battery cells 400 extend longitudinally along the width direction Y. In one embodiment, the battery cell 400 is a cylindrical battery cell, which includes electrode terminals and a circumferential surface, and the axial direction of the battery cell extends along the width direction Y.

[0041] In some implementations, such as Figure 4 and Figure 5 The battery pack also includes at least one connecting piece 410, through which the terminals of each cell 400 are electrically connected to each other. In one embodiment, the connecting piece 410 includes a connecting end 412 and a signal end 411 connected to each other. The connecting end 412 is used to connect to the cell 400 and is located on the end face of the cell 400 along the width direction. The signal end 411 is used to connect to the circuit board 500, and the signal end 411 is bent relative to the connecting end 412.

[0042] refer to Figure 1 and Figure 2 In some embodiments, the housing 200 includes at least a top cover 210 that at least partially covers the support 300 from above. In one embodiment, a guide rail assembly 211 is provided on the top cover 210. The guide rail assembly 211 includes two parallel guide rails extending along the length direction X and protruding from the top cover 210 along the height direction Z. In one embodiment, the battery pack 1 has a locking assembly 212 disposed between the two guide rails. The guide rail assembly 211 and the locking assembly 212 are for detachable connection with a power tool.

[0043] In one embodiment, the top cover 210 has a ventilation hole 214 and / or a slot 213 for receiving battery pack terminals. The ventilation hole 214 is used to communicate the housing 200 with the outside world to facilitate heat dissipation of the battery pack 1.

[0044] above Figures 1-5In some embodiments, the length direction X is the length direction, the width direction Y is the width direction, and the height direction Z is the height direction, wherein the length direction X, the width direction Y and the height direction Z are perpendicular to each other, the width direction Y is parallel to the axial direction of the battery cell, and the height direction Z includes opposite upper and lower directions.

[0045] In some embodiments, the shell 200 further includes a pair of side covers 220 arranged opposite to each other, the side covers 220 covering the end faces 311 of the sleeves 310 at both ends, so as to enclose the receiving cavity 320. In a specific embodiment, the side cover 220 includes an end wall 221 covering one end of the sleeve 310 along the axial direction of the battery cell 400, and a peripheral wall 222 extending from the end wall 221 towards the bottom surface of the shell 200, the peripheral wall 222 at least partially covering the sleeve 310 from below.

[0046] With reference to Figure 6 and Figure 9 In some embodiments, the shell 200 includes a bottom wall 230 arranged opposite to the upper cover 210, at least a portion of the bottom wall 230 being formed by the bracket 300. Specifically, the bracket 300 protrudes from the side away from the upper cover 210 to form a support portion 330, the support portion 330 extending along the length direction X to both ends of the bracket 300, so as to form at least a portion of the bottom wall 230 of the shell 200.

[0047] In a specific embodiment, the bracket 300 protrudes from the region of the bottom surface of the bracket 300 not covered by the peripheral wall 222 along the height direction Z to form the support portion 330, and the peripheral wall 222 and the support portion 330 jointly form the bottom wall 230 of the shell 200. Such an arrangement can simplify the structure of the shell 200, so that the bracket 300 forms a portion of the outer shell 200 of the battery pack, and an additional bottom cover is not needed, thereby reducing the weight of the battery pack 1. Further, the support portion 330 can be arranged as a plurality of spaced-apart ribs, which increases the contact area with air and improves the heat dissipation efficiency of the battery pack.

[0048] In other embodiments, the shell can include an additional bottom cover (not shown in the drawings), the bottom cover covering the bottom surface of the bracket from below, and the upper cover and the bottom cover jointly enclosing a receiving cavity, the bracket being mounted in the receiving cavity. The bottom cover forms the bottom wall of the battery pack in contact with the outside.

[0049] In some embodiments, as Figure 4As shown, the shell 200 further comprises a display wall 240 located at one end of the shell 200 along the length direction X. Optionally, the display wall 240 is located at one end of the bottom wall 230 along the length direction and is integrally formed with the bottom wall 230. The display wall 240 is spaced apart from the bracket 300 along the length direction X, and a mounting cavity is formed between the display wall 240 and the bracket 300, and an electric quantity display assembly is arranged in the mounting cavity. The electric quantity display assembly comprises one or more display windows 241 arranged on the display wall 240, a light guide column 242 at least partially arranged in the mounting cavity, and one or more display lights arranged on the circuit board 500. The light guide column 242 is used to guide the light emitted by the display lights to the display windows 241, respectively.

[0050] In a specific embodiment, the electric quantity display assembly further comprises a plurality of gratings 243 protruding from the side wall of the bracket 300 towards the display wall 240, the gratings 243 extend from the top wall of the bracket 300 to the bottom of the mounting cavity, the light guide column 242 is arranged between adjacent gratings 243, and the gratings 243 can be used to isolate the light of adjacent light guide columns 242.

[0051] Reference Figures 3-4 In some embodiments, the battery pack 1 further comprises a fence 600 for preventing water from flowing to the end face 311 of the sleeve 310. The fence 600 comprises a first fence 610 protruding from the top surface of the bracket 300 along the height direction Z and extending along the length direction X, for preventing water from flowing to the electrode end of the battery cell. In this embodiment, the first fence 610 is used to prevent water from flowing to the electrode end of the battery cell 400 along the width direction Y, so as to avoid water accumulation at the electrode end of the battery cell 400 and reduce the risk of short circuit.

[0052] Specifically, the first fence 610 protrudes from the top surface of the bracket 300, so that the water on the top surface of the bracket 300 is blocked by the first fence 610 and cannot pass through the first fence 610, and the first fence 610 extends along the length direction X. Therefore, the water entering the first fence 610 can flow along the first fence 610 in the length direction X, but cannot flow beyond the first fence 610 in the width direction Y and flow to the electrode end of the battery cell 400 in the width direction Y, thereby reducing the possibility of short circuit between the plurality of battery cells 400 under the conductive action of water.

[0053] In some embodiments, the orthographic projection of the vent hole 214 and / or the slot 213 on the top surface of the bracket 300 is located in the space surrounded by the first barrier 610. Specifically, the battery pack terminals are connected to the power tool through the slot 213, and the battery pack terminals need to be electrically connected to the circuit board 500 and the battery cell 400 inside the battery pack 1. The vent hole 214 needs to exhaust the heat generated during the operation of the battery pack 1, so the vent hole 214 and / or the slot 213 of the battery pack terminal are in communication with the outside of the battery pack 1, and water from the outside can enter the battery pack 1 through the vent hole 214 and / or the slot 213. The orthographic projection of the vent hole 214 and / or the slot 213 on the top surface of the bracket 300 is located in the space surrounded by the first barrier 610, so that the water entering the housing 200 from the vent hole 214 and / or the slot 213 can directly flow into the space surrounded by the first barrier 610, avoiding contact with the electrode end of the battery cell 400 or the connecting piece 410.

[0054] Reference Figure 6 and Figure 10 In some embodiments, the battery pack 1 further comprises a drain hole 700 and a drain channel 800, wherein the drain hole 700 is arranged at the bottom of the battery pack 1, and the drain hole 700 is in communication with the outside. The drain channel 800 is used to guide the water entering the housing 200 to flow from the space surrounded by the barrier 600 to the drain hole 700, so as to drain the water out of the battery pack.

[0055] In an embodiment, the drain hole 700 comprises a first drain hole 710, and the drain channel 800 comprises a first drain channel 810. The first drain hole 710 is arranged at the bottom of the housing 200, and the first drain hole 710 and the first drain channel 810 are arranged in correspondence in the height direction. The first drain channel 810 guides the water on the top surface of the bracket 300 to the first drain hole 710, so as to drain the water out of the housing 200.

[0056] Specifically, the first drain channel 810 is arranged at least partially at one end of the bracket 300 along the length direction, and since the one end of the bracket 300 along the length direction is away from the electrode end of the battery cell 400 and the connecting piece 410, arranging the first drain channel 810 at the one end of the bracket 300 along the length direction can reduce the possibility of water contacting the battery cell 400 and the connecting piece 410. The first drain hole 710 is arranged on the housing 200 or the bracket 300, and the first drain channel 810 guides the water on the top surface of the bracket 300 to the first drain hole 710, so as to drain the water out of the battery pack 1. The first drain hole 710 and the first drain channel 810 are arranged in correspondence in the height direction, reducing the flow path of the water, making the drainage more smooth, and avoiding water accumulation due to delayed drainage.

[0057] In an embodiment, the first drainage hole 710 is arranged at the bottom of the installation cavity, and the first drainage channel 810 is arranged on the side wall of the support 300 facing the display wall 240, and the first drainage channel 810 is at least partially located in the installation cavity. Further, as shown in Figure 6 and Figure 7 , the first drainage hole 710 is arranged at one end of the bottom wall 230 in the length direction. Specifically, the water in the first enclosure 610 flows into the installation cavity through the first drainage channel 810, and then flows out through the first drainage hole 710. Since the entire drainage path of the first drainage channel 810 to the first drainage hole 710 extends along the circumference of the battery cell 400 and does not contact the battery cell 400, the water flow to the battery cell 400 is prevented from causing a short circuit. Further, the first drainage channel 810 and the first drainage hole 710 are arranged using the space of the installation cavity, which saves the space occupied by the first drainage channel 810, making the battery pack 1 more compact.

[0058] Referring to Figure 10 , in an embodiment, the first drainage channel 810 is formed between adjacent grids 243 to guide the water in the first enclosure 610 to fall to the bottom of the installation cavity and then flow out of the battery pack 1 through the first drainage hole 710.

[0059] In another embodiment, the first drainage channel 810 and the first drainage hole 710 are located on the side of the support 300 away from the display wall 900.

[0060] In a specific embodiment, the top surface of the support 300 away from the end of the first drainage channel 810 is higher than the end close to the first drainage channel 810, and the top surface of the support 300 is inclinedly arranged, so that the water can flow along the inclined surface from the inside of the first enclosure 610 to the first drainage channel 810.

[0061] In some embodiments, as shown in Figure 2 and Figure 3 , the battery pack 1 further includes a circuit board 500 supported on the support 300, and the circuit board 500 is used to control the charging and discharging work of the battery pack. Specifically, the circuit board 500 is located between the upper cover 210 and the support 300 in the height direction Z, and the orthographic projection of the circuit board 500 on the top surface of the support 300 is at least partially located in the space enclosed by the enclosure 600. The water falling on the circuit board 500 flows into the enclosure 600 along the extension direction of the circuit board 500 or through the through hole on the circuit board 500, and then flows out through the first drainage channel 810, preventing the water on the circuit board 500 from flowing out of the enclosure 600.

[0062] In a specific embodiment, as shown in Figure 3 , the circuit board 500 has a through hole, and the water entering from the upper part of the shell 200 enters the enclosure 600 through the through hole.

[0063] In one embodiment, the through-holes on the circuit board include soldering holes for soldering components and / or mounting holes for mounting the circuit board 500. Water above the circuit board 500 is drained using existing through-holes in its structure, eliminating the need to develop new through-holes and reducing production costs. In another embodiment, the through-holes on the circuit board are additionally provided through-holes to enhance drainage efficiency.

[0064] In one specific embodiment, a waterproof coating is applied to the circuit board 500 to prevent a small amount of water on the circuit board 500 from causing a short circuit.

[0065] In some implementations, such as Figure 4 and Figure 7 As shown, a first support member 301 protrudes from the top surface of the bracket 300 along the height direction. The first support member 301 supports the circuit board 500, creating a first gap 302 between the circuit board 500 and the top surface of the bracket 300. The first gap 302 between the circuit board 500 and the top surface of the bracket communicates with the first drainage channel 810, ensuring the unobstructed flow of the first drainage channel 810 and preventing the circuit board 500 from being immersed in water. Specifically, the first support member 301 raises the circuit board 500, creating the first gap 302 between the circuit board 500 and the top surface of the bracket 300.

[0066] In one embodiment, the first enclosure 610 serves as the first support member 301, and the first enclosure 610 also serves to raise the circuit board 500 and limit the water flow range.

[0067] In another embodiment, the first support member 301 is a support column distributed inside the first enclosure 610. When the circuit board 500 is installed on the bracket 300, it abuts against the support column. The support column raises the circuit board 500, so that there is a first gap 302 between the circuit board 500 and the top surface of the bracket 300.

[0068] refer to Figure 9 In some embodiments, the drain hole 700 includes a second drain hole 720, which is disposed on the side cover 220. The second drain hole 720 connects the interior of the housing 200 to the outside. Along the height direction Z, the second drain hole 720 is at least partially located below the receiving cavity 320. In one specific embodiment, the second drain hole 720 is disposed on the peripheral wall 222. The second drain hole 720 is used to drain water entering the housing 200 out of the housing, preventing water from accumulating inside the housing and thus preventing water from flowing into the receiving cavity 320 and causing corrosion or short circuit of the battery cell 400. It is understood that in other embodiments, the second drain hole may also be disposed on the end wall, with the lowest point of the second drain hole located below the receiving cavity.

[0069] In particular, in one embodiment, the sleeve 310 is integrally formed, and the circumferential surface of the battery cell 400 is completely wrapped by the insulating wall of the sleeve 310. The second drainage hole 720 is set on the side cover 220, eliminating the need to make holes in the bracket 300 and preventing water from contacting the circumferential surface of the battery cell 400.

[0070] refer to Figure 10 In some embodiments, the drainage channel 800 includes a second drainage channel 820 communicating with a second drainage hole 720, the second drainage hole 720 being correspondingly disposed with respect to the second drainage channel 820. The second drainage channel 820 is at least partially formed on the end face 311 of the sleeve 310 along the axial direction of the battery cell. The second drainage channel 820 is configured to guide water entering the housing 200 toward the second drainage hole 720 to allow water to drain from the housing 200.

[0071] In one specific embodiment, water on the second drainage channel 820 guides water overflowing from the enclosure 600 on the support 300 to the second drainage hole 720, and is discharged through the second drainage hole 720. The second drainage hole 720 and the second drainage channel 820 are correspondingly arranged in the height direction Z, so that the water flowing along the second drainage channel 820 is discharged more smoothly and water accumulation is avoided.

[0072] In some embodiments, a second drainage channel 820 is formed between adjacent sleeves 310. In one specific embodiment, such as Figure 8 As shown, each sleeve 310 has a protrusion 340 at both ends along the width direction Y, and the protrusion 340 at least partially surrounds the corresponding connecting piece 410. The second drainage channel 820 is formed between adjacent protrusions 340.

[0073] Specifically, when too much water enters the housing 200, a small amount of water may overflow the enclosure 600, or water may fall directly onto the outside of the enclosure 600. In this case, water may fall along the end face 311 of the sleeve 310, posing a risk of water seeping into the battery cell 400. The structure of the protrusion 340 guides the water flow to the second drainage channel 820 between the two protrusions 340 and discharges it through the second drainage hole 720, preventing water from contacting the connecting piece 410 and the terminals of the battery cell 400.

[0074] It should be noted that the range corresponding to the second drain hole 720 and the second drain channel 820 is the space that can be drained within the second drain channel 820. Within the space drained by the second drain channel 820, a slight misalignment between the relative positions of the second drain hole 720 and the second drain channel 820 is also within the protection scope of this application.

[0075] In another embodiment, the insulating wall between adjacent sleeves is recessed along the width direction to form a second drainage channel, which connects the second drainage hole with the top surface of the bracket to promptly drain water overflowing from the top surface of the bracket.

[0076] Reference Figure 8 In some embodiments, the peripheral wall 222 is spaced apart from the sleeve 310 to form a flow space S between the peripheral wall 222 and the sleeve 310, the flow space S being in communication with the second drainage channel 820 and the second drainage hole 720. Specifically, the second drainage hole 720 is arranged on the peripheral wall 222, and the end wall 221 is provided with a threaded hole, and the side cover 220 is fixed on the bracket 300 by screwing the threaded hole. The side surface of the peripheral wall 222 facing the sleeve 310 is spaced apart from the lower surface of the sleeve 310, so that the flow space S is formed between the peripheral wall 222 and the sleeve 310, thereby connecting the second drainage hole 720 and the second drainage channel 820, and ensuring smooth drainage. In particular, the peripheral wall 222 is spaced apart from the sleeve 310 to provide a buffer space for the bottom of the battery pack, preventing the side cover 220 from deforming and pressing the sleeve 310 and the battery cell 400 when the battery pack falls or is impacted, thereby causing damage to the battery pack.

[0077] In an embodiment, the lower surface of the bracket 300 is concave and convex corresponding to the contour shape of the plurality of battery cells 400, and the inner surface of the side of the peripheral wall 222 facing the bracket 300 is concave and convex corresponding to the contour of the lower surface of the bracket 300. The second drainage hole 720 is arranged in the concave part of the peripheral wall 222, so that the second drainage hole 720 is located at the lowest part of the peripheral wall 222, facilitating the collection and discharge of water flow.

[0078] Reference Figure 11 The top surface of the bracket is convex in the height direction and provided with a second support 303, and the second support 303 is used to support the signal end 411, so that the second gap 304 is formed between the signal end 411 and the top surface of the bracket.

[0079] Specifically, the connecting piece 410 is used to connect the connection end 412 of the plurality of battery cells 400 and the signal end 411 for transmitting the voltage signal of the battery cell to the circuit board 500. The connection between the battery cell 400 and the circuit board 500 is in sequence: the circuit board 500 connects the signal end 411, the signal end 411 connects the connection end 412, and the connection end 412 connects the plurality of battery cells 400. The structure of mutual connection can guide water, and the water on the circuit board 500 can enter the battery cell 400 along the connecting piece 410. Therefore, the second gap 304 is arranged at the position corresponding to the signal end 411, so as to avoid the water in the space surrounded by the first barrier 610 from contacting the signal end 411 of the connecting piece 410, and the water on the signal end can fall into the second gap 304, preventing the water from flowing along the signal end 411 to the electrode end of the battery cell 400.

[0080] In some embodiments, as Figure 5 and Figure 11As shown, the enclosure 600 further comprises a second enclosure 620 connected with the first enclosure 610, the second enclosure 620 is provided on the top surface of the support in the height direction and extends along the width direction, and the second enclosure 620 at least partially encloses the second gap 304. The space enclosed by the second enclosure 620 is in communication with the space enclosed by the first enclosure 620, and is used to guide the water in the second gap 304 into the first enclosure 620 to avoid flowing to the battery cell 400.

[0081] In specific embodiments, the second enclosure 620 constitutes a semi-enclosed space, and the circumferential edge of the first enclosure 610 is provided with an opening corresponding to the signal end 411, and the signal end 411 extends to below the circuit board 500 through the opening and is electrically connected with the circuit board 500. The second enclosure 620 encloses the side of the opening away from the first enclosure 610, and the second support 303 is arranged at the opening, the second support 303 extends outwardly along the width direction at the opening, and the second enclosure 620 at least partially encloses the second support 303.

[0082] In some embodiments, the blocking wall 621 of the second enclosure 620 extends along the width direction, the second enclosure 620 comprises two blocking walls 621 extending along the width direction and an abutting wall 622 extending along the length direction. The two blocking walls 621 are oppositely arranged along the length direction, and at least part of the two blocking walls 621 are respectively connected to the edges of the opening of the first enclosure 610, and the abutting wall 622 is connected to the ends of the two blocking walls 621 away from the opening. In addition, the edges of the blocking wall 621 in the width direction are flush with the end surface 311 of the sleeve 310 in the width direction, and the abutting wall 622 abuts the connecting piece 410 in the width direction. The abutting wall 622 can block the water in the space enclosed by the second enclosure 620 from flowing along the width direction to avoid the water contacting the connecting piece 410. The second gap 304 is completely in the space enclosed by the second enclosure 620, and the second enclosure 620 guides the water in the second gap 304 into the first enclosure 620 to flow out through the first drainage channel 810.

[0083] Reference Figure 4 , Figure 5 and Figure 11 In some embodiments, the protruding portion 340 encloses the connecting piece 410 to form a gap 350, and the signal end 411 extends through the gap 350 and is connected to the circuit board 500. Specifically, the protruding portion 340 encloses the connecting end 412 and is disconnected at the region corresponding to the signal end 411 to form the gap 350, and the signal end 411 extends through the gap 350 and is connected to the circuit board 500 by bending.

[0084] Reference Figure 5 and Figure 11In some embodiments, the end surface 311 is provided with a protrusion 360 along the axial direction of the battery cell 400 from the gap 350, and the signal terminal 411 is attached to the protrusion 360. In the axial direction of the battery cell 400, the maximum distance between the protrusion 340 and the end surface 311 is greater than the maximum distance between the protrusion 360 and the end surface 311. In a specific embodiment, when the sleeve 310 is viewed along the length direction X, the region corresponding to the protrusion 360, the signal terminal 411 is substantially flush with the protrusion 340. Since the connecting piece 410 is thin, the signal terminal 411 is connected to the circuit board 500 through the gap 350, and water entering the housing 200 will enter the space surrounded by the protrusion 340 through the gap 350. Therefore, the end surface 311 is provided with a protrusion 360 corresponding to the region where the gap 350 is located, and the signal terminal 411 is attached to the protrusion 360, thereby sealing the gap 350 and preventing water from contacting the connecting terminal 412 and the electrode terminal of the battery cell 400. In a specific embodiment, the protrusion 360 and the abutting wall 622 can be integrally provided.

[0085] In an embodiment, as shown in FIG. 4, the minimum distance G between the protrusion 340 corresponding to the region where the gap 350 is located and the signal terminal 411 is not greater than 0.5 mm at both ends. Figure 5 Specifically, due to the manufacturing tolerance, if the distance between the signal terminal 411 and the protrusion 340 is too small during the assembly of the connecting piece 410, the assembly of the connecting piece 410 will be difficult, and therefore the size of the signal terminal 411 needs to be designed to be smaller than the size of the gap 360. However, if the distance between the signal terminal 411 and the protrusion 340 is too large, water will enter the space surrounded by the protrusion 340 through the gap between the signal terminal 411 and the protrusion 340. Therefore, in the present embodiment, the minimum distance between the signal terminal 411 and the protrusion 340 is set to be not greater than 0.5 mm, which facilitates the assembly of the connecting piece 410, and at the same time, water cannot enter the space surrounded by the protrusion 340 through the gap between the signal terminal 411 and the protrusion 340 due to the surface tension of the water, thereby achieving the waterproof function.

[0086] In one embodiment, the thickness of the connecting piece is W along the axial direction of the battery cell, and the distance between the protrusion 340 and the end face 311 is H, where H ≥ W + 0.2 mm. Specifically, since the connecting piece 410 is usually thin, it is prone to bending deformation during manufacturing and welding. If the protrusion height of the protrusion 340 is too low, the deformed connecting piece 410 may exceed the space enclosed by the protrusion 340, leading to the risk of the connecting piece 410 contacting water. Therefore, the protrusion height of the protrusion 340 is set to be at least 0.2 mm greater than the thickness of the connecting piece 410, so that the connecting end 412 is completely within the space enclosed by the protrusion 340. Further, W + 0.5 mm ≥ H. Specifically, if the protrusion height of the protrusion 340 is too large, it will significantly affect the dimensions of the battery pack in the width direction. By limiting the protrusion 340 to the range of W + 0.5 mm ≥ H ≥ W + 0.2 mm, the connecting piece 410 is prevented from contacting water without significantly increasing the size of the battery pack.

[0087] In some implementations, such as Figure 2 and Figure 9 As shown, the battery pack 1 also includes a seal 900 disposed between the side cover 220 and the protrusion 340. The seal 900 is configured such that when the side cover 220 is mounted on the bracket 300, the seal 900 presses against the protrusion 340 to at least partially seal the connecting piece 410 within the space enclosed by the protrusion 340. The seal 900 and the protrusion 340 cooperate to seal the connecting piece 410 and the terminals of the battery cell 400, preventing water ingress that could cause short circuits or corrosion.

[0088] In one embodiment, the seal 900 is pressed against the notch 350. When the side cover 220 is installed on the bracket 300, the seal 900 deforms and presses against the signal end 411 corresponding to the notch 350 to seal the connection end 412. Specifically, the seal 900 is a flexible gasket. The seal 900 covers the end face 311 of the sleeve 310. When the seal 900 is pressed against the protrusion 340, the seal 900 undergoes elastic deformation. The seal 900 at the notch 350 is squeezed and pressed against the signal end 411, thereby sealing the connection end 412 in the space formed by the protrusion 340, the seal 900, and the signal end 411.

[0089] In one embodiment, the sleeve 340 is integrally formed, and the insulating wall of the sleeve 340 completely covers the circumferential surface of the battery cell 400. Furthermore, the sealing member 900 cooperates with the protrusion 310 to seal the battery terminals of the battery cell 400, so that the entire battery cell 400 is sealed in the sealed space formed by the sealing member 900 and the sleeve 310, completely isolated from the outside and eliminating the possibility of water ingress.

[0090] In an embodiment, the sealing member 900 is molded on the side surface of the side cover 220 facing the end surface 311, facilitating assembly work and avoiding misalignment caused by human error during manual assembly, thereby ensuring the waterproof effect of the battery pack.

[0091] Referring to Figures 1-11 , the battery pack 1 comprises: a housing 200, a bracket 300; the housing 200 at least partially covers the bracket 300, the bracket 300 comprises a plurality of sleeves 310, the sleeves 310 are enclosed to form a receiving cavity 320; a plurality of battery cells 400 are arranged at intervals along the length direction X, the battery cells 400 extend longitudinally along the width direction Y, and each battery cell 400 is at least partially accommodated in the corresponding receiving cavity 320; at least one connecting piece 410 electrically connects adjacent battery cells 410; a barrier 600 is used to prevent water from flowing to the end surface 311 of the sleeve 310 arranged perpendicular to the width direction; the barrier 600 comprises a first barrier 610, the first barrier 610 is arranged protruding from the top surface of the bracket 300 along the height direction and extending along the length direction; wherein the height direction Z is perpendicular to the length direction X and the width direction Y. In this embodiment, the battery pack prevents water from flowing to the end of the battery cell 400 by using the barrier 600, avoids water accumulation at the battery cell 400, and reduces the risk of short circuit.

[0092] Referring to Figures 1-11 , the battery pack 1 comprises: a housing 200, the housing 200 comprises an upper cover 210 and a pair of side covers 220 arranged opposite to each other; a bracket 300 comprising a plurality of sleeves 310, the sleeves 310 are enclosed to form a receiving cavity 320, the upper cover 210 at least partially covers the bracket 300 from above; a plurality of battery cells 400, each battery cell 400 is at least partially accommodated in the corresponding receiving cavity 320, and the side cover 220 covers both ends of the sleeve 310 along the axial direction of the battery cell 400; a drain hole 700 is arranged on the side cover 220, the drain hole 700 communicates the inside of the housing 200 with the outside, and the drain hole 700 is at least partially located below the receiving cavity 320. In this embodiment, the battery pack uses the drain hole 700 to drain the water entering the housing 200 out of the housing 200, avoiding water accumulation in the housing 200, thereby avoiding water flowing into the receiving cavity 320 to cause the battery cell 400 to rust or short circuit.

[0093] Referring to Figures 1-11The battery pack comprises: a shell 200, the shell 200 comprising an upper cover 210 and a pair of side covers 220 arranged oppositely; a support 300, the upper cover 210 at least partially covering the support 300 from above, the support 300 comprising a plurality of sleeves 310, the sleeves 310 enclosing a receiving cavity 320; a plurality of battery cells 400, arranged at intervals along the length direction, each battery cell 400 being at least partially received in a corresponding receiving cavity 320, the sleeve 310 comprising an end face 311 arranged perpendicularly to the axial direction of the battery cell 400, the side cover 220 covering the end face 311; at least one connecting tab 410, adjacent battery cells 400 being electrically connected by the connecting tab 410; a protruding portion 340, the protruding portion 340 being arranged protruding in the axial direction of the battery cell 400 from the end face 311, at least one protruding portion 340 at least partially enclosing a corresponding connecting tab 410; a sealing member 900, the sealing member 900 being arranged between the side cover 220 and the protruding portion 340; the sealing member 900 being configured to be pressed against the protruding portion 340 when the side cover 220 is mounted on the support 300, so as to at least partially seal the connecting tab 410 in the space enclosed by the protruding portion 340. In the embodiment, the battery pack uses the sealing member 900 and the protruding portion 340 to seal the connecting tab 410 and the electrode end of the battery cell 400, preventing water from entering and causing short circuit or corrosion of the battery cell 400 or the connecting tab.

[0094] It should be understood by those of ordinary skill in the art that the above discussion of any embodiment is merely exemplary and is not intended to suggest the scope of the application (including the claims) is limited to these examples; under the idea of the application, the above embodiments or technical features among different embodiments can also be combined, steps can be implemented in any order, and there are many other changes of different aspects of the embodiments of the application as described above, which are not provided in details for the sake of brevity.

[0095] The embodiments of the present application are intended to cover all such alternatives, modifications, and variations of the present application falling within the broad scope of the appended claims. Accordingly, any and all such modifications, variations, or equivalents that fall within the spirit and scope of the embodiments of the present application are included herein.

Claims

1. A battery pack, characterized by, The battery pack comprises: a shell; a bracket, the shell at least partially covering the bracket, the bracket comprising a plurality of sleeves, the sleeves enclosing receiving cavities; a plurality of battery cells, arranged at intervals along a length direction, the battery cells extending along a width direction, each of the battery cells being at least partially received in a corresponding receiving cavity; at least one connecting piece, adjacent battery cells being electrically connected by the connecting piece; a barrier, the barrier being configured to prevent water from flowing to an end surface of the sleeve perpendicular to the width direction; the barrier comprising a first barrier, the first barrier being protrudingly arranged along a height direction from a top surface of the bracket and extending along the length direction; wherein the height direction is perpendicular to the length direction and the width direction.

2. The battery pack of claim 1, wherein, Further comprising: a drain hole, provided at a bottom of the battery pack, the drain hole being in communication with the outside; a drain channel, the drain channel being configured to guide water entering the shell to flow from a space enclosed by the barrier to the drain hole, so as to drain the water out of the battery pack.

3. The battery pack of claim 2, wherein: the drain channel comprises a first drain channel, the first drain channel being at least partially arranged at one end of the bracket along the first direction; and / or the drain hole comprises a first drain hole in communication with the first drain channel, the first drain hole being correspondingly arranged with the first drain channel.

4. The battery pack of claim 2 or 3, wherein, the drain channel comprises a second drain channel, the sleeves being provided with protrusions at both ends thereof along an axial direction of the battery cells, the protrusions at least partially enclosing corresponding connecting pieces, the second drain channel being formed between adjacent protrusions; and / or the drain hole comprises a second drain hole in communication with the second drain channel, the second drain hole being correspondingly arranged with the second drain channel.

5. The battery pack of claim 1, wherein, the battery pack further comprises a circuit board, the circuit board being supported on the bracket; a projection of the circuit board on the bracket is at least partially located in the space enclosed by the barrier.

6. The battery pack of claim 5, wherein, the bracket is provided with a first support member protruding therefrom, the first support member being configured to support the circuit board, so that a first gap is formed between the circuit board and the bracket.

7. The battery pack of claim 1, wherein, the shell is provided with a vent hole and / or a slot for receiving a terminal of the battery pack, a projection of the vent hole and / or the slot on the bracket being located in the space enclosed by the barrier.

8. The battery pack of claim 1, wherein, the battery pack further comprises a circuit board, the circuit board being supported on the bracket; the connecting piece comprises a connecting end and a signal end connected to each other, the connecting end being configured to connect the battery cells and being located at the end surface, the signal end being configured to connect the circuit board, and the signal end being bent relative to the connecting end; the bracket is provided with a second support member protruding therefrom along the height direction, the second support member being configured to support the signal end, so that a second gap is formed between the signal end and the bracket.

9. The battery pack of claim 8, wherein, the barrier further comprises a second barrier connected to the first barrier, the second barrier being protrudingly arranged on the bracket along the height direction and extending along the width direction, the second barrier at least partially enclosing the second gap.

10. The battery pack of claim 1, wherein, further comprising a sealing member; The sleeve is provided with a protrusion at both ends in the axial direction of the battery cell, and the protrusion at least partially surrounds the corresponding connecting piece; The shell comprises a side cover covering both ends of the sleeve; The sealing member is arranged between the side cover and the sleeve; The side cover is used to press the sealing member on the protrusion, so as to at least partially seal the connecting piece in the space surrounded by the protrusion.

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