Battery pack, garden equipment and battery pack control method

Abstract

The invention relates to the technical field of garden equipment, in particular to a battery pack, garden equipment and a battery pack control method.The battery pack comprises a shell, a support, a battery cell set, a heat dissipation air channel, air windows formed in the two opposite sides of the shell, at least one first fan capable of rotating in the two directions and a controller; the two ends of the heat dissipation air channel communicate with the air windows on the two sides of the shell correspondingly. The controller is used for controlling the first fan to blow air in the first direction under the first preset condition and controlling the first fan to blow air in the opposite second direction under the second preset condition. By means of the battery pack dust removal device, under the conditions that the structure of the battery pack is not changed and normal heat dissipation of the battery pack is guaranteed, the fan is used for achieving change of the blowing direction in the battery pack under different conditions, dust, sundries and the like in the battery pack are removed from the air window, dust, sundries and the like are prevented from being gathered, and dust removal of the battery pack is achieved; the service life of the battery pack is prolonged, and the dust removal cost of the battery pack can be greatly reduced.

Description

Technical Field

[0001] This application relates to the technical field of garden equipment, and particularly relates to a battery pack, a garden equipment, and a battery pack control method. Background Art

[0002] Garden equipment generally needs to perform long-term continuous operations, such as pruning, trimming, mowing the lawn, etc. These tasks may take several hours or even a whole day to complete, so a large-capacity battery is required to support long-term use.

[0003] Taking a lawn mower as an example, in order to meet the long-term working requirements, a large-capacity battery pack is configured. The battery pack is installed in the battery compartment of the lawn mower. For good ventilation and heat dissipation, the air window of the battery pack is opened very large, and the battery compartment is also designed to communicate with the outside. When the lawn mower is working, sundries such as grass leaves and dust generated during work will enter the battery compartment and accumulate in the battery pack through the air window of the battery pack, which will affect the performance of the battery pack.

[0004] The current solution is to increase a dust-proof net. However, after a period of time, sundries and dust will cause the dust-proof net to become blocked, which is instead not conducive to the heat dissipation of the battery pack. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of this application is to provide a battery pack, a garden equipment, and a battery pack control method, which can utilize the forward and reverse rotation of a fan to achieve dust removal of the battery pack without changing the structure of the battery pack and ensuring the normal heat dissipation of the battery pack.

[0006] To achieve the above purpose and other related purposes, this application provides a battery pack, including:

[0007] A housing, the housing having an accommodation space and air windows opened on opposite sides of the housing;

[0008] A bracket, disposed in the accommodation space;

[0009] At least one battery cell group, installed in the accommodation space through the bracket;

[0010] A heat dissipation air duct, formed in the accommodation space, and both ends of the heat dissipation air duct are respectively communicated with the air windows on both sides of the housing;

[0011] At least one first fan that can rotate bidirectionally, disposed in the accommodation space and located at one side of the air window, and the power of the first fan is 0.8W - 20W;

[0012] A controller, connected to the first fan, is configured to control the first fan to blow air in a first direction under a first preset condition and to control the first fan to blow air in a second direction under a second preset condition, wherein the first direction is opposite to the second direction.

[0013] In an alternative embodiment of the present application, the first preset condition is one of battery pack charging and battery pack discharging, and the second preset condition is the other of battery pack charging and battery pack discharging.

[0014] In an alternative embodiment of the present application, the first preset condition is that the temperature of the battery pack is within a first temperature range, and the second preset condition is that the temperature of the battery pack is within a second temperature range, where the first temperature range is different from the second temperature range.

[0015] In an alternative embodiment of the present application, the first preset condition is a first preset time, and the second preset condition is a second preset time, where the first preset time is different from the second preset time.

[0016] In an alternative embodiment of the present application, the battery pack is a multi-voltage battery pack that can output at least a first voltage and a second voltage, where the first voltage is less than the second voltage;

[0017] The first preset condition is that the battery pack outputs the first voltage; the second preset condition is that the battery pack outputs the second voltage.

[0018] In an alternative embodiment of the present application, the battery pack further includes a status indicating device, connected to the controller, for indicating the operating mode of the fan in the battery pack.

[0019] In an alternative embodiment of the present application, the status indicating device includes a display device and / or a sound device.

[0020] In an alternative embodiment of the present application, the battery pack further includes a collection unit, respectively connected to the battery cell group and the controller, for monitoring and collecting the voltage, current, and temperature of the battery pack and transmitting them to the controller.

[0021] In an alternative embodiment of the present application, the battery pack further includes a dust-proof net disposed at the air window.

[0022] In an alternative embodiment of the present application, it further includes at least one second fan that can rotate unidirectionally, disposed in the accommodation space and at the other air window;

[0023] When the blowing direction when the second fan rotates is the first direction, the controller is configured to control the first fan and the second fan to blow air simultaneously in the first direction under a first preset condition;

[0024] When the blowing direction when the second fan rotates is the second direction, the controller is configured to control the first fan and the second fan to blow air simultaneously in the second direction under a second preset condition.

[0025] In an alternative embodiment of the present application, it further includes at least one second fan that can rotate bidirectionally, which is disposed in the accommodation space and is located at the other wind window;

[0026] The controller is further configured to control the first fan and the second fan to blow air simultaneously in the first direction under the first preset condition, and to control the first fan and the second fan to blow air simultaneously in the second direction under the second preset condition.

[0027] In an alternative embodiment of the present application, the controller is further configured to control the first fan to blow air towards the corresponding wind window during a first time period, control the second fan to blow air towards the corresponding wind window during a second time period, and control the first fan and the second fan to blow air against each other during a third time period to achieve self-cleaning of the battery pack, and the order of the first time period, the second time period, and the third time period is adjustable.

[0028] In an alternative embodiment of the present application, the rotation speed of the first fan and / or the second fan is adjustable.

[0029] To achieve the above object and other related objects, the present application further provides a battery pack, including:

[0030] A housing having an accommodation space and wind windows opened on opposite sides of the housing;

[0031] A bracket disposed in the accommodation space;

[0032] At least one battery cell group mounted in the accommodation space through the bracket;

[0033] A heat dissipation air duct formed in the accommodation space, and two ends of the heat dissipation air duct are respectively communicated with the wind windows on both sides of the housing;

[0034] At least one first fan that can rotate unidirectionally, which is disposed in the accommodation space and is located at one of the wind windows, and the power of the first fan is 0.8W - 20W;

[0035] At least one second fan that can rotate unidirectionally, which is arranged in the accommodation space and is located at the other air window. The blowing directions of the first fan and the second fan are opposite, and the power of the second fan is 0.8W - 20W;

[0036] A controller, which is connected to the first fan and the second fan. The controller is used to control the first fan to operate under a first preset condition and control the second fan to operate under a second preset condition.

[0037] To achieve the above and other related purposes, the present application also provides a gardening device, including:

[0038] A device body, which has an installation part;

[0039] A battery pack, which is installed on the installation part;

[0040] The battery pack includes:

[0041] A housing, which has an accommodation space and air windows opened on opposite sides of the housing;

[0042] A bracket, which is arranged in the accommodation space;

[0043] At least one battery cell group, which is installed in the accommodation space through the bracket;

[0044] A heat dissipation air duct, which is formed in the accommodation space, and both ends of the heat dissipation air duct are communicated with the air windows on both sides of the housing respectively;

[0045] A fan, which is arranged in the accommodation space and is located at the air window. The power of the fan is 0.8W - 20W;

[0046] A controller, which is connected to the fan. The controller is used to control the fan to blow air in a first direction under a first preset condition and control the fan to blow air in a second direction under a second preset condition, where the first direction and the second direction are opposite.

[0047] To achieve the above and other related purposes, the present application also provides a battery pack control method, including:

[0048] Under a first preset condition, control the fan of the battery pack to blow air in a first direction;

[0049] Under a second preset condition, control the fan of the battery pack to blow air in a second direction to achieve dust removal of the battery pack, where the first direction and the second direction are different.

[0050] In an optional embodiment of the present application, the fan of the battery pack includes at least one first fan that can rotate bidirectionally;

[0051] When the first preset condition is satisfied, control the first fan to rotate forward or backward to blow air in the first direction;

[0052] When the second preset condition is satisfied, control the first fan to rotate backward or forward to blow air in the second direction, where the first direction is different from the second direction.

[0053] In an alternative embodiment of the present application, the fans of the battery pack include at least one first fan that can rotate unidirectionally and at least one second fan that can rotate unidirectionally, which are respectively arranged at the air vents on both sides of the battery pack;

[0054] When the first preset condition is satisfied, control the first fan to blow air in the first direction;

[0055] When the second preset condition is satisfied, control the second fan of the battery pack to blow air in the second direction, where the first direction is different from the second direction.

[0056] In an alternative embodiment of the present application, the fans of the battery pack include at least one first fan that can rotate bidirectionally and at least one second fan that can rotate unidirectionally, which are respectively arranged at the air vents on both sides of the battery pack;

[0057] When the first preset condition is satisfied, control the first fan and the second fan to blow air in the first direction simultaneously;

[0058] When the second preset condition is satisfied, control the first fan to blow air in the second direction, where the first direction is different from the second direction.

[0059] In an alternative embodiment of the present application, the fans of the battery pack include at least one first fan that can rotate bidirectionally and at least one second fan that can rotate bidirectionally, which are respectively arranged at the air vents on both sides of the battery pack;

[0060] When the first preset condition is satisfied, control the first fan and the second fan to blow air in the first direction simultaneously;

[0061] When the second preset condition is satisfied, control the first fan and the second fan to blow air in the second direction, where the first direction is different from the second direction.

[0062] Without changing the structure of the battery pack and ensuring the normal heat dissipation of the battery pack, the present application can control the fans to change the blowing direction under different conditions, so that it is relatively easy to clean the dust, debris, etc. inside the battery pack from the air vents, avoid the accumulation of dust, debris, etc., realize the dust removal of the battery pack, and improve the heat dissipation of the battery pack. This is not only beneficial to extending the life of the battery pack, but also can greatly reduce the dust removal cost of the battery pack. Brief Description of the Drawings

[0063] Figure 1 The perspective view of the battery pack in a specific embodiment of the present application is shown.

[0064] Figure 2 The exploded view of the battery pack in a specific embodiment of the present application is shown.

[0065] Figure 3 The functional module diagram of the battery pack with a single-sided two-way fan in a specific embodiment of the present application is shown.

[0066] Figure 4a 、 Figure 4b The schematic diagrams of two working modes of the fan of the battery pack with a single-sided two-way fan in a specific embodiment of the present application are respectively shown.

[0067] Figure 5 The functional module diagram of the battery pack with double-sided fans in a specific embodiment of the present application is shown.

[0068] Figure 6a 、 Figure 6b The schematic diagrams of two working modes of the battery pack with double-sided single-way fans in a specific embodiment of the present application are respectively shown.

[0069] Figures 7a - 7d The schematic diagrams of four fan working modes of the battery pack with a single-way fan on one side and a two-way fan on the other side in a specific embodiment of the present application are respectively shown.

[0070] Figures 8a - 8c The schematic diagram of the fan working mode of the self-cleaning mode of the battery pack with double-sided two-way fans in a specific embodiment of the present application is shown.

[0071] Figure 9 The flowchart of the battery pack control method in a specific embodiment of the present application is shown. Detailed Embodiments

[0072] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0073] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present application. Therefore, only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0074] As Figure 1 and Figure 2 shown, the present application discloses a battery pack for providing power to garden equipment. The garden equipment can be, for example, a lawn mower, a pruning machine, or other garden tools. Of course, it can also be other non-garden tools. The garden equipment includes an equipment body, an operating unit, and a battery pack. The equipment body has an installation part (such as a battery compartment), and the battery pack is installed in the installation part. The battery pack supplies power to the operating unit. The battery pack includes a housing 11, a bracket 14, a plurality of battery cell groups 15, a collection unit 18, a controller 19, and a fan 17. The battery pack is a large-capacity battery pack, and its capacity is, for example, 1 KWh.

[0075] In this embodiment, the housing 11 is square and made of plastic. A handle 13 and an externally inserted connector 16 are provided on the housing 11. Among them, the connector 16 is used to connect to an external device (garden equipment or external power supply) to charge or discharge the battery cells in the battery pack. The setting of the handle 13 facilitates the operator to pick up the battery pack or remove the battery pack from the garden equipment.

[0076] The housing 11 includes an upper housing 111 and a lower housing 112 that are fixedly connected. The upper housing 111 and the lower housing 112 enclose a receiving space. The bracket 14 is disposed in the receiving space, and a plurality of battery cell groups 15 are installed in the receiving space through the bracket 14. A heat dissipation air duct for dissipating heat of the battery pack is provided in the receiving space. The two ends of the heat dissipation air duct are respectively communicated with air windows 12 provided on both sides of the housing 11. The fan 17 is disposed in the receiving space and is located at the air window 12 on at least one side. By using the rotation of the fan 17 to generate an air flow, the surrounding air is sucked in from one air window 12 and blown out from the other air window 12 through the heat dissipation air duct, thereby driving the heat during the charging and discharging process of the battery pack to achieve heat dissipation of the battery pack. Among them, Figure 2 shows a situation where two fans 17 are provided at the air window 12 on one side of the housing 11. During actual use, fans 17 can also be respectively provided at the air windows 12 on both sides, and the number of fans 17 at a single air window 12 can be one or more. The blowing directions of the fans 17 at the air windows 12 on the same side are the same.

[0077] The power of the fan 17 is 0.8W - 20W, preferably 1W - 15W, more preferably 2W - 12W, such as 2W, 4W, 6W, 8W, 10W, 12W; the rotation speed of the fan 17 is adjustable, and the rotation speed range of the fan 17 is 900 revolutions - 15000 revolutions, preferably 1500 revolutions - 13000 revolutions, more preferably 4000 revolutions - 10000 revolutions, such as 4000 revolutions, 5000 revolutions, 6000 revolutions, 7000 revolutions, 8000 revolutions, 9000 revolutions, 10000 revolutions.

[0078] The adjustable rotation speed of the fan 17 can be achieved by any of the following methods:

[0079] 1) Receiving external instructions: such as instructions input through the buttons, touch screen or voice system on the battery pack operation interface, or remotely controlled through a mobile device or a background terminal;

[0080] 2) Receiving internal instructions: The controller 19 outputs relevant instructions based on the collected internal relevant parameters such as voltage, current, temperature or time, etc., to change the rotation speed of the fan 17.

[0081] The acquisition unit 18 is arranged in the accommodation space, and the acquisition unit 18 is respectively connected to the battery cell group 15 and the controller 19. The acquisition unit 18 is used to monitor and collect the voltage, current and temperature of the battery pack and transmit them to the controller 19.

[0082] The acquisition unit 18 may include a voltage acquisition unit for measuring and collecting the voltage information of each battery cell or the battery cell group 15 of the battery pack, a current acquisition unit for measuring and collecting the current information of the battery pack, a temperature acquisition unit for measuring and collecting the temperature information of the battery pack, and a communication interface for transmitting the collected data to the controller 19.

[0083] The controller 19 is arranged in the accommodation space and is connected to the fan 17 and the acquisition unit 18. The controller 19 is used to manage the battery pack, control charging and discharging, manage temperature and protect based on the data collected by the acquisition unit 18 to ensure the normal, safe and efficient operation of the battery pack.

[0084] The controller 19 is also used to control the rotation of the fan 17 of the battery pack to change the blowing direction under different conditions, so that it is relatively easy to clean the dust, sundries, etc. inside the battery pack from the air window 12, avoid the accumulation of dust, sundries, etc., realize the dust removal of the battery pack, improve the heat dissipation effect of the battery pack, which is not only beneficial to extend the life of the battery pack, but also can greatly reduce the dust removal cost of the battery pack.

[0085] To reduce the entry of larger debris and dust into the battery pack through the air window 12, a dust-proof net can also be provided at the air window 12. And since the fan 17 of the battery pack in this embodiment works in a manner of alternately changing the blowing direction, larger debris and dust are not easily accumulated on the dust-proof net to cause blockage of the dust-proof net, thereby improving the heat dissipation effect of the battery pack.

[0086] As Figure 3 and Figure 5 shown, the battery pack further includes a status indicating device 20, which is connected to the controller 19. The status indicating device 20 is used to indicate the working mode of the fan 17 in the battery pack and indicates different statuses according to different working modes of the fan 17. The status indicating device 20 can be a display device, a sound device, or a combination of both. Among them, the display device can be a lamp, or a light strip, or a display screen. The working mode of the fan 17 can, for example, refer to the forward and reverse rotation of the fan 17, the high and low rotation frequencies of the fan 17, or the functions corresponding to the forward and reverse rotation of the fan 17, such as a heat dissipation mode, a dust removal mode, or a self-cleaning mode, etc.

[0087] Among them, for Figure 2 the unilateral two-way fan 17 shown, the display device can display different statuses according to different rotation directions of the fan 17. When the fan 17 rotates forward, the display device is in the first display status. When the fan 17 rotates in reverse, the status indicating device 20 is in the second display status. When the display device is a lamp or a light strip, the display status can be different frequencies of flashing of the same lamp or light strip, or different colors displayed by the same lamp or light strip, or different areas displayed by the same lamp or light strip, or different directions displayed by the same lamp or light strip.

[0088] Taking Figure 2 the unilateral two-way fan 17 in

[0089] as an example, the sound device can change the sound status according to different working modes of the fan 17. When the fan 17 rotates forward, the sound device is in the first sound status. When the fan 17 rotates in reverse, the sound device is in the second sound status. The sound status can, for example, be different in terms of a prompt tone or voice broadcast, or the presence or absence of a prompt tone or voice broadcast, etc. As an example, the voice broadcast can be heat dissipation on, dust removal mode on, etc.

[0090] It should be noted that in this embodiment, when the battery pack is in the dust removal mode, the rotation frequency of the fan 17 can be automatically controlled or manually controlled, that is, the frequency can remain unchanged all the time, or alternately change, or change in sequence. It can also be understood that the rotation speed of the fan 17 is adjustable.

[0091] The dust removal principle of the battery pack will be elaborated in detail below for different setting methods of the fan 17 in the battery pack.

[0092] The first implementation method

[0093] As Figure 3 shown, in this implementation method, the battery pack is a battery pack with a one-sided two-way fan, which includes n battery cell groups 15, namely the first battery cell group 151, the second battery cell group 152,..., the nth battery cell group 15n, a collection unit 18, a controller 19, a first fan 17a and a status indication device 20. Each battery cell group is respectively connected to the controller 19 through the collection unit 18, and the controller 19 is also connected to the first fan 17a and the status indication device 20. The functions of each functional device are as described above and will not be elaborated here.

[0094] As Figure 4a and Figure 4b shown, wind windows 12 are opened on the opposite side walls of the housing 11, namely the first wind window 12a on the left side and the second wind window 12b on the right side. The first fan 17a is arranged at the first wind window 12a. The first fan 17a can rotate bidirectionally and has the functions of forward rotation and reverse rotation, and can realize bidirectional rotation. By changing the rotation direction of the first fan 17a, the blowing direction in the heat dissipation air duct can be changed. Under the condition of ensuring heat dissipation, it is relatively easy to clean the dust, sundries, etc. inside the battery pack from the wind window, avoiding the accumulation of dust, sundries, etc., so as to achieve the dust prevention effect. This is not only beneficial to extending the life of the battery pack, but also can greatly reduce the dust removal cost of the battery pack. Of course, the first fan 17a can also be arranged at the second wind window 12b.

[0095] Specifically, the controller 19 can control the first fan 17a to blow air in the first direction under the first preset condition as Figure 4a shown, and control the first fan 17a to blow air in the second direction under the second preset condition as Figure 4b shown, so as to realize the dust removal of the battery pack. Among them, the first direction is the blowing direction when the first fan 17a rotates forward or reversely, defined as Figure 4a the direction from right to left in Figure 4b , and the second direction is the blowing direction when the first fan 17a rotates reversely or forwardly, defined as

[0096] the direction from left to right in The first direction is opposite to the second direction, and this setting is followed in the subsequent second to fourth implementation methods.

[0096] As an example, the first preset condition is one of battery pack charging and battery pack discharging, and the second preset condition is the other of battery pack charging and battery pack discharging. That is, the controller 19 can control the rotation direction of the first fan 17a differently during battery pack charging and discharging, so as to alternately change the blowing direction of the first fan 17a and realize the dust removal of the battery pack.

[0097] As an example, the first preset condition is that the temperature of the battery pack is within the first temperature range, and the second preset condition is that the temperature of the battery pack is within the second temperature range. The first temperature range and the second temperature range do not overlap. That is, the controller 19 can control the rotation direction of the first fan 17a differently when the temperature of the battery pack is in different temperature ranges, so as to alternately change the blowing direction of the first fan 17a and achieve dust removal of the battery pack.

[0098] As an example, the first preset condition is the first preset time, and the second preset condition is the second preset time. The first preset time and the second preset time are different. For example, taking a single day as the first preset time and a double day as the second preset time. That is, the controller 19 can control the rotation direction of the first fan 17a differently according to different times, so as to alternately change the blowing direction of the first fan 17a and achieve dust removal of the battery pack.

[0099] As an example, when the battery pack is a multi-voltage battery pack that can output at least a first voltage and a second voltage, and the first voltage is less than the second voltage; the first preset condition can be when the battery pack outputs the first voltage or the second voltage; the second preset condition can be when the battery pack outputs the second voltage or the first voltage.

[0100] The second implementation manner

[0101] As Figure 5 shown, in this implementation manner, the battery pack is a battery pack with bilateral unidirectional fans. The battery pack includes n cell groups 15, namely the first cell group 151, the second cell group 152,..., the nth cell group 15n, a collection unit 18, a controller 19, a first fan 17a, a second fan 17b, and a status indicating device 20. Each cell group 15 is respectively connected to the controller 19 through the collection unit 18. The controller 19 is also connected to the first fan 17a, the second fan 17b, and the status indicating device 20. The functions of each functional device are as described above and will not be elaborated here.

[0102] As Figure 6a and Figure 6bAs shown, wind windows 12 are provided on opposite side walls of the housing 11, namely a first wind window 12a on the left side and a second wind window 12b on the right side. The first fan 17a and the second fan 17b are unidirectional rotation fans 17, and the blowing directions of the first fan 17a and the second fan 17b are opposite when they are working. The first fan 17a is arranged in the accommodation space and is located at the first wind window 12a on one side, and can blow air towards the first direction when working. The second fan 17b is arranged in the accommodation space and is located at the second wind window 12b on the other side, and can blow air towards the second direction when working. By asynchronously turning on the first fan 17a and the second fan 17b during the operation of the battery pack to change the blowing direction in the heat dissipation air duct, it is relatively easy to clean the dust, sundries, etc. inside the battery pack from the wind window while ensuring heat dissipation, avoiding the accumulation of dust, sundries, etc., thereby achieving a dust-proof effect. This not only helps to extend the life of the battery pack but also greatly reduces the dust removal cost of the battery pack.

[0103] Specifically, the controller 19 can control the first fan 17a to work and the second fan 17b not to work under the first preset condition as shown Figure 6a to blow air towards the first direction, and control the first fan 17a not to work and the second fan 17b to work under the second preset condition as shown Figure 6b to blow air towards the second direction, so as to achieve dust removal of the battery pack.

[0104] As an example, the first preset condition is one of battery pack charging and battery pack discharging, and the second preset condition is the other of battery pack charging and battery pack discharging. That is, the controller 19 can control different fans to work during battery pack charging and discharging to form different blowing directions and achieve dust removal of the battery pack.

[0105] As an example, the first preset condition is that the temperature of the battery pack is in the first temperature range, and the second preset condition is that the temperature of the battery pack is in the second temperature range. The first temperature range and the second temperature range do not overlap. That is, the controller 19 can control different fans to work when the temperature of the battery pack is in different temperature ranges to form different blowing directions and achieve dust removal of the battery pack.

[0106] As an example, the first preset condition is the first preset time, and the second preset condition is the second preset time. The first preset time and the second preset time are different. For example, taking a single day as the first preset time and a double day as the second preset time. That is, the controller 19 can control different fans to work according to different preset times to form different blowing directions and achieve dust removal of the battery pack.

[0107] As an example, when the battery pack is a multi-voltage battery pack that can output at least a first voltage and a second voltage, and the first voltage is less than the second voltage; the first preset condition can be when the battery pack outputs the first voltage or the second voltage; the second preset condition can be when the battery pack outputs the second voltage or the first voltage.

[0108] The third implementation

[0109] Also refer to Figure 5 , in this implementation, the battery pack is a battery pack with a one-way fan on one side and a two-way fan on the other side, which includes n battery cell groups 15, namely the first battery cell group 151, the second battery cell group 152,..., the nth battery cell group 15n, a collection unit 18, a controller 19, a first fan 17a, a second fan 17b and a status indication device 20. Each battery cell group 15 is respectively connected to the controller 19 through the collection unit 18. The controller 19 is also connected to the first fan 17a, the second fan 17b and the status indication device 20. The functions of each functional device are as described above and will not be elaborated here.

[0110] Such as Figure 7a and Figure 7b , in a specific example, air windows 12 are opened on the opposite side walls of the housing 11, namely the first air window 12a on the left side and the second air window 12b on the right side. The first fan 17a is a unidirectional rotating fan, and its blowing direction during operation is the first direction. The second fan 17b is a bidirectional rotating fan. The first fan 17a is arranged in the accommodation space and is located at the first air window 12a on one side. The second fan 17b is arranged in the accommodation space and is located at the second air window 12b on the other side. By controlling the operation of the first fan 17a and the second fan 17b in an asynchronous combination manner during the operation of the battery pack, the blowing direction and blowing intensity in the heat dissipation air duct are changed. Under the condition of ensuring heat dissipation, it is relatively easy to clean the dust, debris, etc. inside the battery pack from the air window, avoiding the accumulation of dust, debris, etc., thereby achieving a dust-proof effect. This is not only beneficial to extending the life of the battery pack but also can greatly reduce the dust removal cost of the battery pack. Among them, synchronization means that the first fan 17a and the second fan 17b work simultaneously, and asynchronous means that the first fan 17a and the second fan 17b do not work simultaneously.

[0111] Specifically, the controller 19 can control the first fan 17a and the second fan 17b to blow in the first direction simultaneously and enhance the blowing intensity when the first preset condition is met, as shown in Figure 7a . And when the second preset condition is met, the controller 19 can control the first fan 17a not to work, and the second fan 17b rotates in the opposite rotation direction to the first preset condition to blow in the second direction, so as to achieve dust removal of the battery pack, as shown in Figure 7b .

[0112] Such as Figure 7cand 7d , in another specific example, the first fan 17a is a bidirectional rotatable fan, the second fan 17b is a unidirectional rotatable fan, and the blowing direction of the second fan 17b during operation is the second direction. The first fan 17a is disposed in the accommodation space and at the first air window 12a on one side, and the second fan 17b is disposed in the accommodation space and at the second air window 12b on the other side. By controlling the operation of the first fan 17a and the second fan 17b in an asynchronous combination manner during the operation of the battery pack, the blowing direction and blowing intensity in the heat dissipation air duct are changed. Under the condition of ensuring heat dissipation, it is relatively easy to clean the dust, debris, etc. inside the battery pack from the air window, avoiding the accumulation of dust, debris, etc., thereby achieving a dust-proof effect. This is not only beneficial to extending the life of the battery pack, but also can greatly reduce the dust removal cost of the battery pack.

[0113] Specifically, the controller 19 can Figure 7c as shown, control the first fan 17a to operate and the second fan 17b not to operate under the first preset condition to blow in the first direction. Figure 7d as shown, control the first fan 17a to operate and the second fan 17b to operate under the second preset condition to blow in the second direction and enhance the blowing intensity, so as to achieve dust removal of the battery pack.

[0114] As an example, the first preset condition is one of battery pack charging and battery pack discharging, and the second preset condition is the other of battery pack charging and battery pack discharging. That is, the controller 19 can control the working modes of the first fan 17a and the second fan 17b during battery pack charging and discharging to form different blowing directions and blowing intensities, so as to achieve dust removal of the battery pack.

[0115] As an example, the first preset condition is that the temperature of the battery pack is in the first temperature range, and the second preset condition is that the temperature of the battery pack is in the second temperature range. The first temperature range and the second temperature range do not overlap. That is, the controller 19 can control the working modes of the first fan 17a and the second fan 17b when the battery pack is at different temperature ranges to form different blowing directions, so as to achieve dust removal of the battery pack.

[0116] As an example, the first preset condition is the first preset time, and the second preset condition is the second preset time. The first preset time and the second preset time are different. For example, taking a single day as the first preset time and a double day as the second preset time. That is, the controller 19 can control different working modes of the first fan 17a and the second fan 17b according to different preset times to form different blowing directions, so as to achieve dust removal of the battery pack.

[0117] As an example, when the battery pack is a multi-voltage battery pack that can output at least a first voltage and a second voltage, the first voltage is less than the second voltage; the first preset condition can be when the battery pack outputs the first voltage or the second voltage; the second preset condition can be when the battery pack outputs the second voltage or the first voltage.

[0118] The fourth implementation mode

[0119] Also refer to Figure 5 , in this implementation mode, the battery pack is a battery pack with double-sided bidirectional fans, including n battery cell groups 15, namely the first battery cell group 151, the second battery cell group 152,..., the nth battery cell group 15n, a collection unit 18, a controller 19, a first fan 17a, a second fan 17b, and a status indication device 20. Each battery cell group 15 is respectively connected to the controller 19 through the collection unit 18, and the controller 19 is also connected to the first fan 17a, the second fan 17b, and the status indication device 20. The functions of each functional device are as described above and will not be elaborated here.

[0120] As Figures 8a through 8c shown, both the first fan 17a and the second fan 17b are bidirectional rotation fans. The first fan 17a is arranged in the accommodation space and is located at the first air window 12a on one side, and the second fan 17b is arranged in the accommodation space and is located at the second air window 12b on the other side. By controlling the operation of the first fan 17a and the second fan 17b in an asynchronous combination manner during the operation of the battery pack to change the blowing direction in the heat dissipation air duct, it is relatively easy to clean the dust, debris, etc. inside the battery pack from the air window while ensuring heat dissipation, avoiding the accumulation of dust, debris, etc., thereby achieving a dust-proof effect. This not only helps to extend the life of the battery pack but also greatly reduces the dust removal cost of the battery pack.

[0121] The controller 19 can control the first fan 17a and the second fan 17b to blow air synchronously in the first direction under the first preset condition to enhance the blowing intensity, and control the first fan 17a and the second fan 17b to blow air synchronously in the second direction under the second preset condition to enhance the blowing intensity, so as to achieve dust removal of the battery pack. The definitions of the first preset condition and the second preset condition are as described in the third implementation mode and will not be elaborated here.

[0122] It should be noted that in this implementation mode, one of the first fan 17a and the second fan 17b of the battery pack can also be set to rotate unidirectionally, so the control logic of the third implementation mode can also be used for control.

[0123] It should be noted that for the battery pack with double-sided bidirectional fans 17, it can also operate in the self-cleaning mode. In the self-cleaning mode, it includes the following three steps: As Figure 8aAs shown, the first fan 17a is controlled to blow air in the first direction during the first time period, that is, to blow air towards the first air window 12a on the corresponding side, as Figure 8b shown, the second fan 17b is controlled to blow air in the second direction during the second time period, that is, to blow air towards the second air window 12b on the corresponding side. As shown in 8c, the first fan 17a and the second fan 17b are controlled to blow air against each other during the third time period to achieve self-cleaning of the battery pack, wherein the order of the first time period, the second time period, and the third time period is adjustable.

[0124] By blowing air against each other between the first fan 17a and the second fan 17b during the third time period, a turbulent flow can be formed inside the battery pack to blow the dust and debris deposited inside the battery off the deposition surface, and then the dust and debris are blown out of the air window through the unidirectional air blowing during the first time period or the second miscalculation to achieve self-cleaning.

[0125] As Figure 9 shown, the present application also discloses a battery pack control method, including the following steps:

[0126] S10, when a first preset condition is met, controlling the fan of the battery pack to blow air in the first direction;

[0127] S20, when a second preset condition is met, controlling the fan of the battery pack to blow air in the second direction to achieve dust removal of the battery pack, wherein the first direction is different from the second direction.

[0128] The fan can be at least one first fan 17a that can rotate bidirectionally as shown in Figure 4a and Figure 4b . When the first preset condition is met, controlling the first fan 17a to rotate forward or backward to blow air in the first direction; when the second preset condition is met, controlling the first fan 17a to rotate backward or forward to blow air in the second direction, wherein the first direction is different from the second direction. For the detailed control logic, refer to the first implementation manner above and will not be elaborated here.

[0129] The fan 17 can refer to a combination of at least one first fan 17a that can rotate unidirectionally and at least one second fan 17b that can rotate unidirectionally as shown in Figure 6a and Figure 6b . They are respectively arranged at the first air window 12a and the second air window 12b on the left and right sides of the battery pack; when the first preset condition is met, controlling the first fan 17a to blow air in the first direction; when the second preset condition is met, controlling the second fan 17b of the battery pack to blow air in the second direction, wherein the first direction is different from the second direction. For the detailed control logic, refer to the second implementation manner above and will not be elaborated here.

[0130] The fan 17 can refer to a combination of at least one first fan 17a that can rotate unidirectionally and at least one second fan 17b that can rotate unidirectionally as shown in Figure 7c and Figure 7dThe combination of at least one first fan 17a that can rotate bidirectionally and at least one second fan 17b that can rotate unidirectionally is respectively arranged at the first air window 12a and the second air window 12b on the left and right sides of the battery pack; when the first preset condition is met, control the first fan 17a and the second fan 17b to blow air in the first direction simultaneously; when the second preset condition is met, control the first fan 17a to blow air in the second direction, where the first direction is different from the second direction. Of course, the installation positions of the first fan 17a and the second fan 17b can also be interchanged to form an arrangement as shown in Figure 7a and 7b The control logic is similar. For the detailed control logic, see the third implementation mode above and will not be elaborated here. The fan 17 can refer to a combination of at least one first fan 17a that can rotate bidirectionally and at least one second fan 17b that can rotate bidirectionally as shown in Figures 8a - 8c The combination is respectively arranged at the first air window 12a and the second air window 12b on the left and right sides of the battery pack; when the first preset condition is met, control the first fan 17a and the second fan 17b to blow air in the first direction simultaneously; when the second preset condition is met, control the first fan 17a and the second fan 17b to blow air in the second direction, where the first direction is different from the second direction. For the detailed control logic, see the fourth implementation mode above and will not be elaborated here.

[0131] In summary, the present application can, without changing the structure of the battery pack and ensuring the normal heat dissipation of the battery pack, control the fan to change the blowing direction under different conditions, so as to relatively easily clean the dust, debris, etc. inside the battery pack from the air window, avoid the accumulation of dust, debris, etc., achieve dust removal of the battery pack, and improve the heat dissipation of the battery pack. This is not only beneficial to extending the life of the battery pack, but also can greatly reduce the cost of dust removal of the battery pack.

[0132] In addition, for a battery pack with a long heat dissipation path, the battery cells at the air inlet can always be well cooled. The air is continuously heated during the process of flowing towards the battery cells at the end of the heat dissipation path, resulting in the battery cells at the end of the heat dissipation path not being well cooled. Over time, the stability of the battery cells at the end of the heat dissipation path will decline. The present application adopts the forward and reverse rotation methods, which can not only remove dust, but also switch the air inlet and outlet by the forward and reverse rotation of the fan, so that the battery cells on both sides of the battery pack can be well cooled, thereby improving the stability of the battery cells and the battery pack.

[0133] In the present application, the carrier of the fan is the battery pack. In other embodiments, the carrier of the fan can also be the housing of related equipment, that is, the carrier of the fan is related equipment. Mounting the fan and the corresponding control method on the related equipment can also achieve the effects of dust removal and heat dissipation.

[0134] It will be apparent to those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application.

[0135] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A battery pack, characterized in that, Comprising: A housing having an accommodation space and air vents formed on opposite sides of the housing; A bracket disposed within the accommodation space; At least one battery cell group mounted within the accommodation space by means of the bracket; A heat dissipation air duct formed within the accommodation space, with both ends of the heat dissipation air duct communicating with the air vents on both sides of the housing respectively; At least one first fan capable of bidirectional rotation, disposed within the accommodation space and located at one of the air vents, with the power of the first fan being 0.8W - 20W; A controller connected to the first fan, the controller being configured to control the first fan to blow air in a first direction under a first preset condition and to control the first fan to blow air in a second direction under a second preset condition, wherein the first direction is opposite to the second direction.

2. The battery pack according to claim 1, characterized in that, The first preset condition is one of battery pack charging and battery pack discharging, and the second preset condition is the other of battery pack charging and battery pack discharging.

3. The battery pack according to claim 1, characterized in that, The first preset condition is that the temperature of the battery pack is within a first temperature range, and the second preset condition is that the temperature of the battery pack is within a second temperature range, with the first temperature range being different from the second temperature range.

4. The battery pack according to claim 1, characterized in that, The first preset condition is a first preset time, and the second preset condition is a second preset time, with the first preset time being different from the second preset time.

5. The battery pack according to claim 1, characterized in that, The battery pack is a multi-voltage battery pack capable of outputting at least a first voltage and a second voltage, with the first voltage being less than the second voltage; The first preset condition is that the battery pack outputs the first voltage; the second preset condition is that the battery pack outputs the second voltage.

6. The battery pack according to claim 1, wherein The battery pack further includes a status indicating device connected to the controller, the status indicating device being configured to indicate the working mode of the fan in the battery pack; the status indicating device includes a display device and / or a sound device.

7. The battery pack according to claim 1, characterized in that, The battery pack further includes a collection unit connected to the battery cell group and the controller respectively, the collection unit being configured to monitor and collect the voltage, current, and temperature of the battery pack and transmit them to the controller.

8. The battery pack according to claim 1, characterized in that, The battery pack further includes a dust-proof net disposed at the air vent.

9. The battery pack according to claim 1, wherein Further comprising at least one second fan capable of unidirectional rotation, disposed within the accommodation space and located at the other air vent; When the blowing direction of the second fan during rotation is the first direction, the controller is configured to control the first fan and the second fan to blow air in the first direction simultaneously under the first preset condition; When the blowing direction of the second fan during rotation is the second direction, the controller is configured to control the first fan and the second fan to blow air in the second direction simultaneously under the second preset condition.

10. The battery pack according to claim 1, wherein, Further comprising at least one second fan capable of bidirectional rotation, disposed within the accommodation space and located at the other air vent; The controller is further configured to control the first fan and the second fan to blow air in the first direction simultaneously under the first preset condition and to control the first fan and the second fan to blow air in the second direction simultaneously under the second preset condition.

11. The battery pack according to claim 10, wherein The controller is further configured to control the first fan to blow air towards the corresponding side's wind window during a first time period, control the second fan to blow air towards the corresponding side's wind window during a second time period, and control the first fan and the second fan to blow air towards each other during a third time period, so as to achieve self-cleaning of the battery pack, and the sequence of the first time period, the second time period, and the third time period is adjustable.

12. The battery pack according to claim 9 or 10, characterized in that, The rotation speed of the first fan and / or the second fan is adjustable.

13. A battery pack, characterized in that, Comprising: A housing having an accommodation space and wind windows opened on opposite sides of the housing; A bracket disposed in the accommodation space; At least one battery cell group mounted in the accommodation space through the bracket; A heat dissipation air duct formed in the accommodation space, and two ends of the heat dissipation air duct are respectively communicated with the wind windows on both sides of the housing; At least one unidirectional rotatable first fan disposed in the accommodation space and located at one side's wind window, and the power of the first fan is 0.8W - 20W; At least one unidirectional rotatable second fan disposed in the accommodation space and located at the other side's wind window, the blowing directions of the first fan and the second fan are opposite, and the power of the second fan is 0.8W - 20W; A controller connected to the first fan and the second fan, and the controller is configured to control the first fan to operate under a first preset condition and control the second fan to operate under a second preset condition.

14. A gardening device, characterized in that, Comprising: An equipment body having a mounting portion; A battery pack mounted on the mounting portion; The battery pack includes: A housing having an accommodation space and wind windows opened on opposite sides of the housing; A bracket disposed in the accommodation space; At least one battery cell group mounted in the accommodation space through the bracket; A heat dissipation air duct formed in the accommodation space, and two ends of the heat dissipation air duct are respectively communicated with the wind windows on both sides of the housing; A fan disposed in the accommodation space and located at the wind window, and the power of the fan is 0.8W - 20W; A controller connected to the fan, and the controller is configured to control the fan to blow air in a first direction under a first preset condition and control the fan to blow air in a second direction under a second preset condition, wherein the first direction and the second direction are opposite.

15. The gardening equipment according to claim 14, characterized in that, The gardening equipment includes a lawn mower, a snow sweeper, a hedge trimmer, and a floor sweeper.

16. A battery pack control method, characterized in that, Comprising: Under a first preset condition, controlling the fan of the battery pack to blow air in a first direction; Under a second preset condition, controlling the fan of the battery pack to blow air in a second direction to achieve dust removal of the battery pack, wherein the first direction and the second direction are different.

17. The battery pack control method according to claim 16, wherein The fan of the battery pack includes at least one bidirectional rotatable first fan; Under the first preset condition, controlling the first fan to rotate forward or backward to blow air in a first direction; Under the second preset condition, controlling the first fan to rotate backward or forward to blow air in a second direction, wherein the first direction and the second direction are different.

18. The battery pack control method according to claim 16, wherein The fan of the battery pack includes at least one first fan that can rotate unidirectionally and at least one second fan that can rotate unidirectionally, which are respectively arranged at the air windows on both sides of the battery pack; When the first preset condition is met, control the first fan to blow air in the first direction; When the second preset condition is met, control the second fan of the battery pack to blow air in the second direction, where the first direction is different from the second direction.

19. The battery pack control method according to claim 16, characterized in that, The fan of the battery pack includes at least one first fan that can rotate bidirectionally and at least one second fan that can rotate unidirectionally, which are respectively arranged at the air windows on both sides of the battery pack; When the first preset condition is met, control the first fan and the second fan to blow air in the first direction simultaneously; When the second preset condition is met, control the first fan to blow air in the second direction, where the first direction is different from the second direction.

20. The battery pack control method according to claim 16, characterized in that, The fan of the battery pack includes at least one first fan that can rotate bidirectionally and at least one second fan that can rotate bidirectionally, which are respectively arranged at the air windows on both sides of the battery pack; When the first preset condition is met, control the first fan and the second fan to blow air in the first direction simultaneously; When the second preset condition is met, control the first fan and the second fan to blow air in the second direction, where the first direction is different from the second direction.

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