Battery pack and charging system

Abstract

The utility model provides a battery pack and a charging system, and the battery pack comprises a housing which is provided with an accommodation space, and a support which is arranged in the accommodation space and is provided with a plurality of installation positions; the battery cell is arranged in the mounting position and comprises at least two battery cell groups, and a gap is formed between every two adjacent battery cell groups; the waterproof heat dissipation assembly comprises a first waterproof heat dissipation assembly and a second waterproof heat dissipation assembly, the first waterproof heat dissipation assembly is arranged on the side, facing the battery cell, of the support and located in the gap, the second waterproof heat dissipation assembly is arranged on the side, facing the shell, of the support, and at least part of the second waterproof heat dissipation assembly is connected with the shell; the first waterproof heat dissipation assembly and the second waterproof heat dissipation assembly are both connected with the support in a sealed mode, and the first waterproof heat dissipation assembly and the second waterproof heat dissipation assembly share the same heat dissipation channel. The battery pack provided by the utility model can simultaneously meet the waterproof, dustproof and active heat dissipation functions.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery pack and a charging system. Background Art

[0002] High power and fast charge and discharge are the current development direction of batteries. In order to obtain higher power, several single battery modules need to be connected in series into a battery pack to generate high-voltage direct current. When the charge and discharge rate is higher, the temperature of the battery pack rises faster. However, temperature has a dual effect on the battery. Specifically, as the temperature rises, the internal resistance of the battery decreases, thereby improving the battery efficiency. However, higher temperatures will accelerate the rate of harmful chemical reactions and cause permanent damage to the battery structure. Therefore, it is necessary to dissipate the temperature of the battery pack.

[0003] At present, for high-power output battery packs, in order to ensure their discharge power, generally only the heat dissipation requirements are taken into consideration, while the waterproof requirements cannot be met at the same time, which limits the use scenarios of the battery packs to a certain extent.

[0004] In view of this, it is indeed necessary to improve the existing battery pack to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a battery pack which is waterproof and has an active heat dissipation function.

[0006] To achieve the above object, the utility model provides a battery pack, comprising:

[0007] The housing has a receiving space.

[0008] A bracket, arranged in the accommodation space and having a plurality of installation positions;

[0009] A battery cell is arranged in the installation position, and includes at least two battery cell groups, and a gap is provided between adjacent battery cell groups;

[0010] A waterproof heat dissipation component comprises a first waterproof heat dissipation component and a second waterproof heat dissipation component, wherein the first waterproof heat dissipation component is arranged on a side of the bracket facing the battery cell and is located in the gap, and the second waterproof heat dissipation component is arranged on a side of the bracket facing the shell and is at least partially connected to the shell, the first waterproof heat dissipation component and the second waterproof heat dissipation component are both sealed and connected to the bracket, and the first waterproof heat dissipation component and the second waterproof heat dissipation component share the same heat dissipation channel.

[0011] As a further improvement of the present invention, the first waterproof heat dissipation component includes a heat conductive part and two first waterproof parts, the two first waterproof parts are respectively located on both sides of the heat conductive part and on both sides of the heat dissipation channel, and each of the first waterproof parts is sealed and connected to the heat conductive part and the bracket.

[0012] As a further improvement of the present invention, the heat dissipation channel is formed in the middle of the heat conducting member, and a plurality of striped protrusions are provided on the inner surface of the heat conducting member facing the heat dissipation channel.

[0013] As a further improvement of the present invention, two second waterproof heat dissipation components are provided, and the two second waterproof heat dissipation components are respectively located on both sides of the heat dissipation duct, and both include a heat dissipation component and a second waterproof component located on the side of the heat dissipation component facing the bracket.

[0014] As a further improvement of the utility model, a plurality of gaps are provided on the heat dissipation element, and the gaps are communicated with the heat dissipation channel.

[0015] As a further improvement of the utility model, the first waterproof component and the second waterproof component are respectively located on both sides of the bracket and are both sealed to the bracket, and the fasteners sequentially pass through the heat dissipation component, the second waterproof component, the bracket, the first waterproof component and the heat conductive component to fix the heat dissipation component to the heat conductive component.

[0016] As a further improvement of the utility model, the heat sink is provided with a first sliding portion, the shell is provided with a second sliding portion, and the heat sink is slidably connected to the shell via the first sliding portion and the second sliding portion.

[0017] As a further improvement of the present invention, the heat sink is a sealed structure and has a first position and a second position on the shell. When the heat sink is located at the first position, the heat dissipation channel is sealed by the heat sink, and when the heat sink is located at the second position, the heat dissipation channel is connected to the outside.

[0018] As a further improvement of the present invention, the heat sink is at least partially located in the heat dissipation channel, and an elastic member is provided between the heat sink and the heat conductive member, and a pushing portion is provided on the side of the heat sink facing away from the second waterproof member, and under the action of an external force, the pushing portion is pushed to switch the heat sink from the first position to the second position, and the elastic member maintains the tendency to switch the heat sink from the second position to the first position under the action of its own elastic force.

[0019] As a further improvement of the present invention, the outer side of the battery core is wrapped with a heat absorber.

[0020] Another object of the present invention is to provide a charging system having the above-mentioned battery pack.

[0021] To achieve the above-mentioned purpose, the utility model provides a charging system, including a base and a battery pack, the battery pack including a shell, a bracket, a battery cell and a waterproof heat dissipation component, the shell has a accommodating space, the bracket is arranged in the accommodating space, and has a plurality of installation positions; the battery cell is arranged in the installation position, including at least two battery cell groups, and a gap is provided between adjacent battery cell groups; the waterproof heat dissipation component includes a first waterproof heat dissipation component and a second waterproof heat dissipation component, the first waterproof heat dissipation component is arranged on a side of the bracket facing the battery cell, and is located in the gap, the second waterproof heat dissipation component is arranged on a side of the bracket facing the shell, and is at least partially connected to the shell, the first waterproof heat dissipation component and the second waterproof heat dissipation component are both sealed and connected to the bracket, and the first waterproof heat dissipation component and the second waterproof heat dissipation component share the same heat dissipation channel; a fan is provided on the base, and the air outlet of the fan faces the heat dissipation channel.

[0022] The beneficial effects of the utility model are as follows: the battery pack of the utility model arranges a first waterproof heat dissipation component in the gap of the battery cell group, arranges a second waterproof heat dissipation component on the shell, and makes the first waterproof heat dissipation component and the second waterproof heat dissipation component share the same heat dissipation channel, so that the heat of the battery cell can be quickly transferred to the heat dissipation channel through the first waterproof heat dissipation component and then dissipated through the second waterproof heat dissipation component, and the two ends of the battery cell group are sealed with the bracket through the first waterproof heat dissipation component to prevent water from entering the battery cell group, and the shell and the bracket are sealed through the second waterproof heat dissipation component to prevent local water from entering the shell, so that the battery pack can simultaneously meet the functions of waterproof, dustproof and fast active heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the battery pack of Example 1 of the present utility model.

[0024] Figure 2 yes Figure 1 The structural exploded diagram of the battery pack is shown.

[0025] Figure 3 yes Figure 1 A cross-sectional view of the battery pack shown.

[0026] Figure 4 yes Figure 1 A cross-sectional view of the battery pack from another angle is shown.

[0027] Figure 5 yes Figure 1 A perspective view of the bracket of the battery pack shown.

[0028] Figure 6 yes Figure 1 An exploded view of the structure of the first waterproof heat dissipation component of the battery pack is shown.

[0029] Figure 7 yes Figure 1 An exploded view of the structure of the second waterproof heat dissipation assembly of the battery pack is shown.

[0030] Figure 8 It is a three-dimensional schematic diagram of the heat sink in the battery pack of Example 2 of the utility model when it is in the first position.

[0031] Fig. 9 It is a three-dimensional schematic diagram of the heat sink in the battery pack of Embodiment 2 of the present utility model when it is in the second position.

[0032] Fig.10 It is a structural explosion diagram of embodiment 2 of the present utility model.

[0033] Fig.11 It is a cross-sectional view of Example 2 of the present utility model.

[0034] Fig.12 It is a cross-sectional view from another angle of embodiment 2 of the present utility model.

[0035] Fig.13 It is a three-dimensional diagram of the heat conducting member of Example 2 of the utility model.

[0036] Fig.14 It is a three-dimensional diagram of the heat sink of Example 2 of the utility model.

[0037] Fig.15 It is a three-dimensional diagram of a charging system according to a preferred embodiment of the utility model.

[0038] Fig.16 yes Fig.15 The structural exploded diagram of the charging system is shown. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] See also Figures 1 to 7 As shown, a battery pack 100 of a preferred embodiment of the utility model is used to provide power for a power tool. The power tool can be a gardening tool or other non-gardening tool. The battery pack 100 includes a housing 1, a bracket 2, a battery cell 3 and a waterproof heat dissipation component.

[0042] In this embodiment, the housing 1 is rectangular and made of plastic. An interface (not shown) for connecting to an external device (power tool or external power source) is provided on the housing 1, through which the battery cells 3 in the battery pack 100 are charged or discharged.

[0043] The housing 1 includes a first housing 11 and a second housing 12, and the first housing 11 and the second housing 12 are arranged to form a receiving space. In this embodiment, the first housing 11 and the second housing 12 are fixedly connected by bolts or other structures to improve the sealing of the housing 1 and prevent moisture, dust, etc. from entering the receiving space and damaging the battery cell 3. In other embodiments, the first housing 11 and the second housing 12 may also be connected by a lock or a detachable connection to facilitate users to check and repair the battery cell 3.

[0044] See also Figure 5 Combined with Figures 2 to 3 As shown, the bracket 2 is arranged in the accommodating space, including a first bracket 21 and a second bracket 22. The first bracket 21 and the second bracket 22 are symmetrically arranged and placed vertically front and back along a second direction perpendicular to the extension direction of the battery cell 3 (defined as the first direction). A plurality of mounting positions 23 for mounting the battery cell 3 are formed between the first bracket 21 and the second bracket 22. The battery cell 3 is mounted on the mounting position 23 so that both ends of the battery cell 3 are sealed and wrapped in the mounting position 23 in the circumferential direction. By arranging the bracket 2 in the accommodating space of the shell 1, the sealing of the battery cell 3 is achieved in the up and down directions, and finally the battery cell 3 is sealed in the battery pack 100, so that the battery pack 100 is waterproof as a whole.

[0045] A plurality of mounting portions 24 for mounting metal connecting sheets are provided on the side opposite to each other between the first bracket 21 and the second bracket 22. A plurality of battery cells 3 are connected by the metal connecting sheets to form at least two battery cell groups, and a gap 33 is provided between adjacent battery cell groups. In the present embodiment, the battery pack 100 includes two battery cell groups, namely the first battery cell group 31 and the second battery cell group 32. There is a gap 33 between the first battery cell group 31 and the second battery cell group 32. The gap 33 is used to install the first waterproof heat dissipation component 4 in the waterproof heat dissipation component, so as to transfer the heat generated by the battery cell group through the first waterproof heat dissipation component 4 in the gap 33, and at the same time, the battery cell 3 is sealed and fixed by the first waterproof heat dissipation component 4. Of course, in other embodiments, the battery pack 100 may also include more than two battery cell groups, which is not limited by the present application.

[0046] The waterproof heat dissipation component includes a first waterproof heat dissipation component 4 and a second waterproof heat dissipation component 5. The first waterproof heat dissipation component 4 is arranged on the side of the bracket 2 facing the battery cell 3 and is located in the gap 33. The second waterproof heat dissipation component 5 is arranged on the side of the bracket 2 facing the shell 1 and is at least partially connected to the shell 1. That is to say, the first waterproof heat dissipation component 44 and the second waterproof heat dissipation component 5 are respectively arranged on both sides of the bracket 2, and the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 are both sealed and connected to the bracket 2, and the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 share the same heat dissipation channel 411. By respectively arranging the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 on both sides of the bracket 2, that is, arranging the first waterproof heat dissipation component 4 in the gap 33 of the battery cell group and arranging the second waterproof heat dissipation component 5 on the shell 1, the battery cells in the battery cell group are sealed and fixed by the first waterproof heat dissipation component 4, and at the same time, the two ends of the battery cell 3 are sealed with the bracket 2 to prevent water from entering the battery cell 3. The bracket 2 and the shell 1 are sealed by the second waterproof heat dissipation component 5 to prevent water from entering the shell 1. In addition, since the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 share the same heat dissipation channel 411, heat can be dissipated quickly, so that the battery pack 100 can simultaneously meet the functions of waterproof, dustproof and fast active heat dissipation.

[0047] See also Figure 6 As shown, the first waterproof heat dissipation component 4 includes a heat conductive member 41 and two first waterproof members 42, the two first waterproof members 42 are respectively located on both sides of the heat conductive member 41, and are respectively located on both sides of the heat dissipation channel 411, and each first waterproof member 42 is sealed and connected to the heat conductive member 41 and the bracket 2. Optionally, the sealed connection refers to the sealing of the contact surface between the first waterproof member 41 and the bracket 2 and the heat conductive member 41.

[0048] The extension direction of the heat conducting member 41 is parallel to the extension direction of the battery core 3, that is, the heat conducting member 41 extends along the first direction. Preferably, the heat conducting member 41 can be a metal heat conducting block or a phase change cooling material, such as a heat conducting material.

[0049] The heat conductive member 41 includes an outer surface 413 facing the battery cell group and an inner surface 412 opposite to the outer surface 413. The outer surface 413 may be a surface that matches the battery cell 3. For example, in the present embodiment, the outer surface 413 is a plurality of connected arcuate surfaces, which match the arcuate shape of the battery cell 3, so that the heat conductive member 41 has a larger contact area with the battery cell 3, thereby facilitating active heat dissipation of the battery cell 3 through the heat conductive member 41. Moreover, since the arcuate surface 413 of the heat conductive member 41 can wrap the battery cell 3 in the circumferential direction, the heat conductive member 41 and the bracket 2 cooperate to seal and fix the battery cell 3 in the circumferential direction.

[0050] A heat dissipation channel 411 is formed in the middle of the heat conducting member 41. The heat dissipation channel 411 extends along the first direction and is used to dissipate heat from the battery cell 3. A plurality of striped protrusions 4121 are provided on the inner surface 412 of the heat conducting member 41 facing the heat dissipation channel 411. By providing the striped protrusions 4121, the area of ​​the inner surface 412 of the heat conducting member 41 is increased, thereby increasing the heat dissipation area and facilitating heat dissipation of the battery pack 100.

[0051] Furthermore, along the extension direction of the heat dissipation channel 411, two first waterproof members 42 are respectively arranged at the two ends of the heat conductive member 41, and are located on the side of the first bracket 21 and the second bracket 22 facing the heat conductive member 41. The two first waterproof members 42 can seal the two ends of the battery cell 3. At the same time, the first waterproof member 42 and the heat conductive member 41 cooperate to seal the first bracket 21 and the second bracket 22 to prevent water from entering the interior of the housing 1.

[0052] Furthermore, there is a certain thickness between the inner surface 412 and the outer surface 413, forming a connecting surface 414. The shape of the first waterproof member 42 is the same as the shape of the connecting surface 414. This arrangement facilitates the sealing fit between the first waterproof member 42 and the heat-conducting member 41, and the heat-conducting member 41 and the bracket 2 are sealed by the first waterproof member 42. At the same time, the first channel 421 in the middle of the first waterproof member 42 is the same shape as the heat dissipation channel 411 to facilitate heat dissipation. In this embodiment, the first waterproof member 42 is a first waterproof foam, and in other embodiments, the first waterproof member 42 can also be other waterproof sealing members.

[0053] See also Figure 7 Combined with Figures 1 to 4 As shown, in this embodiment, two second waterproof heat dissipation components 5 are provided, and the two second waterproof heat dissipation components 5 are respectively located on both sides of the heat dissipation channel 411, and each includes a heat dissipation element 51 and a second waterproof element 52 located on the side of the heat dissipation element 51 facing the bracket 2, and the second waterproof element 52 seals the bracket 2 with the heat dissipation element 51 (housing 1). Optionally, the sealed connection refers to the sealing of the contact surface between the second waterproof element 52 and the bracket 2 and the heat dissipation element 51.

[0054] The heat sink 51 is provided with a plurality of heat dissipation holes 512 , which are connected to the heat dissipation channels 411 , so as to facilitate heat generated by the battery core 3 to be dissipated through the heat dissipation channels 411 and the heat dissipation holes 512 .

[0055] Optionally, in this embodiment, a plurality of fences 511 are provided on the heat sink 51, and the plurality of fences 511 are arranged in parallel along the second direction and are of different sizes to match the shape of the heat dissipation channel 411. In other embodiments, the plurality of fences 511 may also be arranged in parallel along the first direction, etc., and the utility model is not limited thereto. There are heat dissipation holes 512 between adjacent fences 511 that are connected to the heat dissipation channel 411. That is, in this embodiment, the heat sink 51 is a protective wind window arranged on the housing 1. The fence 511 is provided to prevent the user from accidentally touching and getting burned. Because the battery pack 100 is hot inside before and after use, it may burn the skin, and the fence 511 is provided to protect the user. At the same time, the provision of the heat dissipation holes 512 also facilitates ventilation and heat dissipation of the heat dissipation channel 411. In addition, the strip fence 511 can also be used as an external suspension support rib, which is convenient for the user to hang and store the battery pack 100 when the battery pack 100 is not in use.

[0056] Furthermore, two heat sinks 51 are respectively arranged on both sides of the housing 1. An opening 121 is provided at a position of the housing 1 corresponding to the heat sink 51, and a plurality of step-shaped support portions 122 are provided at the edge of the opening 121 for connecting with the heat sink 51. At the same time, the plane where the outermost layer of the heat sink 51 is located is the same plane as the plane where the housing 1 is located, thereby improving the aesthetics of the battery pack 100.

[0057] The second waterproof member 52 is disposed on the side of the heat sink 51 facing the bracket 2. That is, the first waterproof member 42 and the second waterproof member 52 are respectively located on both sides of the bracket 2. Figure 2 As shown, the second waterproof member 52 and the first waterproof member 42 are respectively provided on the left and right sides of the first bracket 21, wherein the first waterproof member 42 is provided on the inner side of the first bracket 21 to be sealed and fitted with the connection surface 414 of the heat-conducting member 41, so as to seal and connect the heat-conducting member 41 with the first bracket 21. The second waterproof member 52 is provided on the outer side of the first bracket 21 to be tightly fitted with the heat-dissipating member 51, so as to seal and connect the first bracket 21 with the housing 1. Similarly, the first waterproof member 42 and the second waterproof member 52 are also provided on both sides of the second bracket 22, so as to seal and connect the second bracket 22 with the heat-conducting member 41 and the housing 1.

[0058] Preferably, a second hole 521 is provided in the middle of the second waterproof member 52, and the shape of the second hole 521 matches the shape of the heat dissipation channel 411. Preferably, the second waterproof member 52 is a second waterproof foam. In other embodiments, the second waterproof member 52 may also be other waterproof sealing members.

[0059] Furthermore, the first bracket 21 and the second bracket 22 are both provided with vents 25 at positions corresponding to the heat dissipation channel 411 to facilitate heat dissipation. The first waterproof member 42 and the second waterproof member 52 are respectively located on both sides of the vents 25 and are both sealed and connected to the bracket 2 to prevent moisture and dust from entering the mounting position 23 of the bracket 2 to corrode the battery cell 3.

[0060] Furthermore, fixing holes 7 are provided on the heat sink 51, the second waterproof component 52, the bracket 2, the first waterproof component 42 and the heat conductive component 41, and the fastener 8 passes through the heat sink 51, the second waterproof component 52, the bracket 2, the first waterproof component 42 and the heat conductive component 41 in sequence to fix the heat sink 51 to the heat conductive component 41, and at the same time, the first waterproof component 42 and the second waterproof component 52 are sealed and fixedly connected to the bracket 2.

[0061] Furthermore, a heat absorbing member 6 is wrapped around the outer side of the battery core 3, and the battery core 3 is connected to the heat conducting member 41 through the heat absorbing member 6. The heat absorbing member 6 may be a phase change material, which is used to actively absorb the heat of the battery core 3, so as to actively dissipate the heat of the battery core 3.

[0062] The waterproof heat dissipation process of the battery pack 100 of the utility model is as follows: the heat generated by the battery cell 3 is actively absorbed by the heat absorbing member 6, and the heat absorbing member 6 transfers the heat to the heat conducting member 41, and then dissipates the heat along the first direction through the heat dissipation channel 411. Since the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 share the same heat dissipation channel 411, the heat is transferred to the heat dissipation member 51 through the heat dissipation channel 411, and the heat is quickly dissipated through the heat dissipation holes 512 on the heat dissipation member 51. At the same time, the heat dissipation channel 411 can also be cooled by blowing or sucking air through the heat dissipation holes 512 on the heat dissipation member 51. Although the shell 1 of the battery pack 100 is not completely sealed due to the presence of the heat dissipation holes 512 on the heat dissipation member 51, the bracket 2 is sealed by the first waterproof member 42 and the second waterproof member 52, that is, the second waterproof member 52 seals the connection surface between the shell 1 and the bracket 2, and the first waterproof member 42 seals the bracket 2 and the heat conducting member 41. At the same time, the first waterproof component 42 and the heat conductive component 41 seal the bracket 2 and the battery cell 3, so that external moisture, dust, etc. only contact the heat dissipation channel 411 in the middle of the heat conductive component 41, but cannot contact the battery cell 3, thereby improving the waterproof and dustproof effect and extending the service life of the battery pack 100.

[0063] Example 2

[0064] See also Figures 9 to 14 As shown, the battery pack 100 of Example 2 of the utility model is shown. The battery pack 100 also includes a housing 1, a bracket 2, a battery cell 3 and a waterproof heat dissipation component. In this embodiment, most of the structure and working principle of the battery pack 100 are the same as those of Example 1, and the difference lies in the structure of the heat dissipation element 51 and the heat conduction element 41. The following description mainly describes the differences, and the similarities are not repeated here.

[0065] In this embodiment, the heat sink 51 is a sealed structure and is slidably connected to the shell 1. There are a first position and a second position on the shell 1. When the heat sink 51 is in the first position, the heat dissipation channel 411 is sealed by the heat sink 51 to prevent water and dust. When the heat sink 51 is in the second position, the heat dissipation channel 411 is connected to the outside world, and ventilation and heat dissipation can be performed at this time. In addition, since the heat dissipation channel 411 of the heat conductive member 41 replaces the battery cell 3 in contact with the outside world, when the heat sink 51 is in the second position, it can also have a waterproof effect on the battery cell 3, thereby achieving a waterproof and heat dissipation effect for the battery pack 100.

[0066] Furthermore, a first sliding portion 5131 is provided on the heat sink 51, and a second sliding portion 123 is provided on the shell 1. The heat sink 51 is slidably connected to the shell 1 through the first sliding portion 5131 and the second sliding portion 123, so that the heat sink 51 can reciprocate between the first position and the second position.

[0067] In this embodiment, the two heat sinks 51 are an integrally formed structure, including two symmetrically arranged extension arms 513 and a connecting arm 514 for connecting the two extension arms 513. A slide groove is provided on the side of at least one extension arm 513 facing the connecting arm 514, and a slide rail is provided at a position corresponding to the slide groove on the shell 1, and the heat sink 51 is slidably connected through the slide groove and the slide rail. In other embodiments, the two heat sinks 51 can also be a split structure, symmetrically arranged, and both include an extension arm 513 and a connecting arm 514, each extension arm 513 is provided with a slide groove, and correspondingly, the shell 1 is provided with a slide rail. Alternatively, the extension arm 513 is provided with a slide rail, and the shell 1 is provided with a slide groove. The present utility model is not limited to this.

[0068] Furthermore, the height of the opening 121 on the housing 1 is greater than the height of the extension arm 513 on the heat sink 51 , so that a clearance portion 124 is formed on the housing 1 to facilitate the switching of the heat sink 51 between the first position and the second position.

[0069] Furthermore, the heat sink 51 is at least partially located in the heat dissipation channel 411, and an elastic member 9 is provided between the heat sink 51 and the heat conductive member 41, and a pushing portion 5132 is provided on the side of the heat sink 51 away from the second waterproof member 52. Under the action of external force, the pushing portion 5132 is pushed to switch the heat sink 51 from the first position to the second position, and the elastic member 9 maintains the tendency to switch the heat sink 51 from the second position to the first position under the action of its own elastic force.

[0070] Specifically, the connecting arm 514 of the heat sink 51 passes through the heat dissipation channel 411 of the heat conductor 41. The heat conductor 41 is provided with a bearing arm 415 at a position corresponding to the connecting arm 514 to bear the connecting arm 514 and limit the connecting arm 514. A first protrusion 515 is provided on the side of the connecting arm 514 away from the bearing arm 415, and a second protrusion 416 is formed on the inner surface 412 of the heat conductor 41 facing the bearing arm 415 and extending in the direction of the bearing arm 415. An elastic member 9 is provided between the first protrusion 515 and the second protrusion 416. In this embodiment, the elastic member 9 is a spring, and the elastic force direction of the spring is parallel to the second direction. A pushing portion 5132 is provided on the side of the heat sink 51 away from the second waterproof member 52 (i.e., the side facing the outside world) to facilitate the user to push, so that the heat sink 51 switches between the first position and the second position.

[0071] When there is no external force, under the elastic force of the elastic member 9, the heat sink 51 remains in the first position, and under the action of the heat sink 51, the first waterproof member 42, the second waterproof member 52 and the heat conductive member 41, the battery pack 100 is waterproof and dustproof. Under the action of the external force, the push portion 5132 is pushed, and the connecting arm 514 is moved away from the bearing arm 415 by the external force, thereby compressing the elastic member 9. At this time, the heat sink 51 switches from the first position to the second position, thereby achieving ventilation, heat dissipation and waterproof effects. When the external force disappears, under the elastic force of the elastic member 9 itself, the connecting arm 514 moves toward the bearing arm 415 and is limited by the bearing arm 415.

[0072] Furthermore, a stopper (not shown) may be provided on the heat sink 51 or the heat conductor 41, so that when the external force disappears, the heat sink 51 can be kept in the second position under the action of the stopper, that is, the battery pack 100 is always in a state of ventilation and heat dissipation. When heat dissipation is not required and only waterproof and dustproof are required, the heat sink 51 can be detached from the stopper, so that it returns to the first position under the elastic force of the elastic member 9.

[0073] In this embodiment, the heat sink 51 has a first position and a second position, so that it can switch between the first position and the second position according to the usage scenario of the battery pack 100, thereby satisfying the waterproof and dustproof function of the battery pack 100 and realizing the active heat dissipation function.

[0074] Example 3

[0075] See also Figure 15 to Figure 16As shown, the utility model provides a charging system 200, which includes a base 20 and a battery pack 100. The battery pack 100 can be the battery pack 100 of embodiment 1 or the battery pack 100 of embodiment 2. For the sake of clarity, the following description takes the battery pack 100 of embodiment 1 as an example for detailed description, but it should not be limited to this.

[0076] The base 20 is provided with a plurality of receiving slots 201, which are arranged side by side inside the base 20 and configured to receive the battery pack 100. An electrical connection portion 202 is provided inside the receiving slot 201 for electrically connecting with the battery pack 100 to charge the battery pack 100 or facilitate the discharge of the battery pack 100. The charging system 200 further includes a heat dissipation structure, which includes a fan (not shown) disposed inside the base 20 and between adjacent receiving slots 201, and an air inlet (not numbered) and an air outlet 301 of the fan disposed on the base 20.

[0077] The battery pack 100 is arranged in the receiving groove 201 and is electrically connected to the charging system 200 through the electrical connection part 202 for charging or discharging. The battery pack 100 includes a shell 1, a bracket 2, a battery cell 3 and a waterproof heat dissipation component. The shell 1 has a receiving space. The bracket 2 is arranged in the receiving space and has a plurality of mounting positions 23. The battery cell 3 is arranged in the mounting position 23, including at least two battery cell groups, and a gap 33 is provided between adjacent battery cell groups. The waterproof heat dissipation component includes a first waterproof heat dissipation component 4 and a second waterproof heat dissipation component 5. The first waterproof heat dissipation component 4 is arranged on the side of the bracket 2 facing the battery cell 3, and is located in the gap 33. The second waterproof heat dissipation component 5 is arranged on the side of the bracket 2 facing the shell 1, and is at least partially connected to the shell 1. The first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 are both sealed and connected to the bracket 2, and the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 share the same heat dissipation channel 411.

[0078] When the battery pack 100 is placed in the receiving slot 201 on the base 20, the heat dissipation channel 411 of the battery pack 100 faces the air outlet 301 of the fan. In this way, when the battery pack 100 is being charged or discharged, the fan can blow or extract air from the battery pack 100 to quickly transfer the heat generated by the battery pack 100 to the heat conducting member 41 through the heat absorbing member 6, and then quickly dissipate the heat to the outside through the heat dissipation channel 411 of the heat conducting member 41 and the heat dissipation holes 512 on the heat dissipating member 51, thereby realizing the rapid heat dissipation function of the battery pack 100 and reducing the temperature of the battery pack 100.

[0079] In summary, the battery pack 100 of the utility model is provided with a first waterproof heat dissipation component 4 in the gap 33 of the battery cell group, and a second waterproof heat dissipation component 5 is provided on the shell 1, and the first waterproof heat dissipation component 4 and the second waterproof heat dissipation component 5 share the same heat dissipation channel 411, so that the heat of the battery cell 3 can be quickly transferred to the heat dissipation channel 411 through the first waterproof heat dissipation component 4 and then dissipated through the second waterproof heat dissipation component 5. Moreover, the two ends of the battery cell group are sealed with the bracket 2 through the first waterproof heat dissipation component 4 to prevent water from entering the battery cell group, and the shell 1 and the bracket 2 are sealed through the second waterproof heat dissipation component 5 to prevent local water from entering the shell 1, so that the battery pack 100 can simultaneously meet the functions of waterproof, dustproof and fast active heat dissipation. In addition, by providing a striped protrusion 4121 on the inner surface 412 of the heat conductor 41, the heat dissipation area is increased and the heat dissipation effect is improved. Furthermore, a plurality of fences 511 are provided on the heat sink 51 to prevent the battery pack 100 from becoming too hot inside before and after use, which may cause skin burns. At the same time, the striped fences 511 can be used as external hanging support ribs, so that the user can hang and store the battery pack 100 when the battery pack 100 is not in use.

[0080] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A battery pack, characterized in that: include: The housing has a receiving space. A bracket, arranged in the accommodation space and having a plurality of installation positions; A battery cell is arranged in the installation position, and includes at least two battery cell groups, and a gap is provided between adjacent battery cell groups; The waterproof heat dissipation component comprises a first waterproof heat dissipation component and a second waterproof heat dissipation component, wherein the first waterproof heat dissipation component is arranged on a side of the bracket facing the battery cell and is located in the gap, and the second waterproof heat dissipation component is arranged on a side of the bracket facing the shell and is at least partially connected to the shell, the first waterproof heat dissipation component and the second waterproof heat dissipation component are both sealed to the bracket, and the first waterproof heat dissipation component and the second waterproof heat dissipation component share the same heat dissipation channel.

2. The battery pack according to claim 1, characterized in that: The first waterproof heat dissipation component includes a heat conductive part and two first waterproof parts. The two first waterproof parts are respectively located on both sides of the heat conductive part and on both sides of the heat dissipation channel. Each of the first waterproof parts is sealed and connected to the heat conductive part and the bracket.

3. The battery pack according to claim 2, characterized in that: The heat dissipation channel is formed in the middle of the heat conducting member, and a plurality of stripe protrusions are arranged on the inner surface of the heat conducting member facing the heat dissipation channel.

4. The battery pack according to claim 2, characterized in that: There are two second waterproof heat dissipation components, which are respectively located on both sides of the heat dissipation duct, and each of them includes a heat dissipation component and a second waterproof component located on the side of the heat dissipation component facing the bracket.

5. The battery pack according to claim 4, characterized in that: The heat sink is provided with a plurality of heat dissipation holes, and the heat dissipation holes are communicated with the heat dissipation channel.

6. The battery pack according to claim 4, characterized in that: The first waterproof component and the second waterproof component are respectively located on both sides of the bracket and are both sealed to the bracket. The fasteners sequentially pass through the heat sink, the second waterproof component, the bracket, the first waterproof component and the heat conductive component to fix the heat sink and the heat conductive component.

7. The battery pack according to claim 4, characterized in that: The heat sink is provided with a first sliding portion, the shell is provided with a second sliding portion, and the heat sink is slidably connected to the shell via the first sliding portion and the second sliding portion.

8. The battery pack according to claim 7, characterized in that: The heat sink is a sealing structure and has a first position and a second position on the housing. When the heat sink is located at the first position, the heat dissipation channel is sealed by the heat sink, and when the heat sink is located at the second position, the heat dissipation channel is connected to the outside.

9. The battery pack according to claim 8, characterized in that: The heat sink is at least partially located in the heat dissipation channel, and an elastic member is provided between the heat sink and the heat conductive member. A pushing portion is provided on the side of the heat sink facing away from the second waterproof member. Under the action of an external force, the pushing portion is pushed to switch the heat sink from the first position to the second position. Under the action of its own elastic force, the elastic member maintains the tendency to switch the heat sink from the second position to the first position.

10. The battery pack according to claim 1, characterized in that: The outer side of the battery core is wrapped with a heat absorbing member.

11. A charging system, characterized in that: include: A base and a battery pack, the battery pack comprising a shell, a bracket, a battery cell and a waterproof heat dissipation component, the shell having a accommodating space, the bracket being arranged in the accommodating space and having a plurality of mounting positions; the battery cell being arranged in the mounting position, comprising at least two battery cell groups, and a gap being arranged between adjacent battery cell groups; the waterproof heat dissipation component comprising a first waterproof heat dissipation component and a second waterproof heat dissipation component, the first waterproof heat dissipation component being arranged on a side of the bracket facing the battery cell and being located in the gap, the second waterproof heat dissipation component being arranged on a side of the bracket facing the shell and being at least partially connected to the shell, the first waterproof heat dissipation component and the second waterproof heat dissipation component being both sealed and connected to the bracket, and the first waterproof heat dissipation component and the second waterproof heat dissipation component sharing the same heat dissipation channel; a fan is provided on the base, and an air outlet of the fan faces the heat dissipation channel.

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