Battery pack tray device, battery pack and electric equipment

Abstract

The utility model discloses a battery pack tray device, a battery pack and electric equipment. The battery pack tray device comprises a tray, a bottom protection plate and a sensing device; the bottom protection plate is positioned on one side of the tray deviating from the battery pack; the sensing device is located between the tray and the bottom protection plate, the sensing device is sequentially provided with a first sensing part, an insulation part and a second sensing part, the first sensing part is used for sensing a temperature electric signal representing temperature change, and the second sensing part is used for sensing a force electric signal representing force change. Therefore, due to the arrangement of the first induction part, the second induction part and the insulation part, a temperature electric signal representing the temperature change of the tray can be sensed through the first induction part, a force electric signal representing the change of impact force borne by the bottom protection plate can be sensed through the second induction part, and electric conduction between the first induction part and the second induction part is avoided; therefore, mutual influence of signals sensed by the first sensing part and the second sensing part is avoided, and the impact on the bottom protection plate and the temperature of the tray can be sensed more accurately.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, and in particular to a battery pack tray device, a battery pack and electrical equipment. Background Art

[0002] In the related art, the bottom guard plate is usually used to cover the battery tray to protect the battery tray. The sensor is located between the bottom guard plate and the tray. In this way, the sensor contacts the bottom guard plate and the tray at the same time. The sensor simultaneously senses the temperature of the tray and the impact on the bottom guard plate. The sensor senses the temperature of the tray and the impact on the bottom guard plate inaccurately. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the specific embodiments section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above technical problems, the utility model provides a battery pack tray device, the battery pack tray device comprising:

[0005] Tray, the tray is used to carry the battery pack;

[0006] a bottom guard plate, the bottom guard plate being located on the side of the tray facing away from the battery pack; and

[0007] The sensing device is located between the tray and the bottom guard plate. The sensing device is provided with a first sensing part, an insulating part and a second sensing part in sequence in the direction from the tray toward the bottom guard plate. The first sensing part is used to sense the temperature electrical signal indicating the temperature change, and the second sensing part is used to sense the force electrical signal indicating the force change.

[0008] According to the battery pack tray device of the utility model, the arrangement of the first sensing part, the second sensing part and the insulating part can sense the temperature electric signal indicating the temperature change of the tray through the first sensing part, and sense the force electric signal indicating the change of the impact force exerted on the bottom guard plate through the second sensing part, thereby avoiding conduction between the first sensing part and the second sensing part, and further avoiding mutual influence between the signals sensed by the first sensing part and the second sensing part, and being able to more accurately sense the impact exerted on the bottom guard plate and the temperature of the tray.

[0009] Optionally, the sensing device is attached to the tray and to the bottom guard.

[0010] Optionally, the surface of the tray facing the bottom guard plate is recessed away from the bottom guard plate to form a mounting groove, and the sensor device is located in the mounting groove.

[0011] Optionally, the surface of the bottom guard plate facing the tray protrudes close to the tray to form a mounting protrusion, and the mounting protrusion at least partially extends into the mounting groove.

[0012] Optionally, there are multiple sensing devices, and the multiple sensing devices are arranged at intervals, or

[0013] The tray has a bearing portion, which is used to place batteries of the battery pack. The sensing device extends from one end of the bearing portion to the other end in a horizontal direction.

[0014] Optionally, at least one of the first sensing portion and the second sensing portion is a polyvinylidene fluoride member and a binary copolymer member thereof, or a polyvinylidene fluoride member and a ternary copolymer member thereof.

[0015] Optionally, the sensing device further includes a surface portion, which wraps the insulating portion, the first sensing portion and the second sensing portion.

[0016] Optionally, the surface layer is a plastic part or a silicone rubber part.

[0017] Optionally, the sensing device further includes a first electrode portion connected to the first sensing portion, and a second electrode portion connected to the second sensing portion, and the battery pack tray device further includes a connector, and both the first electrode portion and the second electrode portion are connected to the connector.

[0018] Optionally, the connector is also used to be electrically connected to a voltage collection signal line of the battery pack.

[0019] Optionally, the connector is located on the side of the tray along the horizontal direction.

[0020] The utility model also provides a battery pack, the battery pack comprising:

[0021] Battery packs; and

[0022] The aforementioned battery pack tray device.

[0023] According to the battery pack of the utility model, the battery pack includes the aforementioned battery pack tray device, and the arrangement of the first sensing part, the second sensing part and the insulating part can sense the temperature electrical signal indicating the temperature change of the tray through the first sensing part, and sense the force electrical signal indicating the change of the impact force exerted on the bottom guard plate through the second sensing part, thereby avoiding conduction between the first sensing part and the second sensing part, and further avoiding mutual influence between the signals sensed by the first sensing part and the second sensing part, and being able to more accurately sense the impact exerted on the bottom guard plate and the temperature of the tray.

[0024] The utility model also provides an electric device, which includes the aforementioned battery pack.

[0025] According to the electrical equipment of the utility model, the electrical equipment includes the aforementioned battery pack, and the battery pack includes the aforementioned battery pack tray device. The arrangement of the first sensing part, the second sensing part and the insulating part can sense the temperature electrical signal indicating the temperature change of the tray through the first sensing part, and sense the force electrical signal indicating the change of the impact force exerted on the bottom guard plate through the second sensing part, thereby avoiding conduction between the first sensing part and the second sensing part, and further avoiding mutual influence between the signals sensed by the first sensing part and the second sensing part, and being able to more accurately sense the impact exerted on the bottom guard plate and the temperature of the tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the advantages of the utility model more easily understood, the utility model briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the utility model and should not be considered as limiting the scope of protection thereof. The utility model is described and explained with additional characteristics and details through the accompanying drawings.

[0027] Figure 1 A three-dimensional schematic diagram of a battery pack provided with a battery pack tray device according to a first preferred embodiment of the utility model;

[0028] Figure 2 To set Figure 1 A partial enlarged schematic diagram of the battery pack at A of the battery pack tray device;

[0029] Figure 3 To set Figure 1 A partial enlarged schematic diagram of a battery pack at position B of a battery pack tray device;

[0030] Figure 4 To set Figure 1 Another three-dimensional schematic diagram of a battery pack of the battery pack tray device; and

[0031] Figure 5 To set Figure 4 A partial enlarged schematic diagram of location C of the battery pack of the battery pack tray device.

[0032] Description of Reference Numerals

[0033] 110: tray 111: carrying part

[0034] 112: Side wall 113: Mounting groove

[0035] 114: Placement cavity 120: Bottom guard plate

[0036] 121: Mounting protrusion 130: Sensor device

[0037] 131: Induction part 132: Insulation part

[0038] 133: Surface layer 134: Electrode portion

[0039] 135: first sensing part 136: second sensing part

[0040] 137: first electrode portion 138: second electrode portion

[0041] 140: Connector 150: Battery pack DETAILED DESCRIPTION

[0042] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are only for the purpose of illustration and are not intended to be limiting.

[0044] In this document, ordinal numbers such as “first” and “second” cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order.

[0045] In order to thoroughly understand the implementation of the utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the utility model is not limited to the specific details familiar to those skilled in the art. The preferred implementation of the utility model is described in detail below, but in addition to these detailed descriptions, the utility model can also have other implementations.

[0046] The utility model provides a battery pack tray device. The battery pack tray device can be used for electrical equipment. The electrical equipment can be vehicles, ships, energy storage cabinets, drones, electric two-wheeled vehicles, electric multi-wheeled vehicles, computers, laptop computers, and electric toys. The electrical equipment includes a battery pack, and the battery pack is used to power the electrical equipment.

[0047] The electric device of the embodiment of the utility model is illustrated by taking a vehicle as an example. Specifically, the electric device also includes a vehicle body, and the battery pack is installed on the vehicle body. In this embodiment, the vehicle body includes a chassis. The battery pack is installed on the chassis.

[0048] The battery pack tray device is provided with a sensor device 130 for sensing the impact force applied to the bottom guard plate 120 and the temperature of the tray 110 .

[0049] like Figures 1 to 5As shown, the battery pack tray device includes a tray 110. The tray 110 can be connected to the body of the vehicle. At this time, the battery pack 150 of the battery pack can be placed on the tray 110 so that the tray 110 can carry the battery pack 150.

[0050] like Figures 1 to 5 As shown, the battery pack tray device further includes a sensor device 130 and a bottom guard plate 120. The bottom guard plate 120 is located on a side of the tray 110 that is away from the battery pack 150.

[0051] Specifically, along the setting direction D1, the tray 110, the sensor device 130 and the bottom guard plate 120 are sequentially arranged. When the battery pack tray device is arranged in a vehicle, the sensor device 130 is located below the tray 110. The sensor device 130 is located between the tray 110 and the bottom guard plate 120. The bottom guard plate 120 is located below the tray 110. The sensor device 130 is attached to the surface of the tray 110 facing the bottom guard plate 120. The sensor device 130 is also attached to the surface of the bottom guard plate 120 facing the tray 110. The bottom guard plate 120 is connected to the tray 110. On the projection plane perpendicular to the setting direction D1, the projection of the tray 110 is located within the projection of the bottom guard plate 120, and the projection of the sensor device 130 is located within the projection of the tray 110. In this way, the bottom guard plate 120 can protect the tray 110 and the sensor device 130.

[0052] When the battery pack tray device is installed in a vehicle, the installation direction D1 is parallel to the vertical direction.

[0053] The sensor device 130 may be a thin film sensor with a small thickness (along the setting direction D1). Thus, along the setting direction D1, the size of the sensor device 130 is smaller than the size of the tray 110. Along the setting direction D1, the size of the sensor device 130 is smaller than the size of the bottom guard plate 120. Thus, the sensor device 130 does not affect the installation of the bottom guard plate 120 and the tray 110. Thus, the height dimension of the battery pack tray device is small.

[0054] Furthermore, the thickness of the sensor device 130 is in the micron level.

[0055] The sensor device 130 can be bonded to the bottom guard plate 120 by means of colloid. The sensor device 130 can be bonded to the tray 110 by means of colloid. Thus, the installation of the sensor device 130 is facilitated.

[0056] The sensing device 130 integrates the functions of a piezoelectric sensor and a pyroelectric sensor. The sensing device 130 can sense changes in force based on the piezoelectric effect, and then convert the changes in force into force electrical signals. The sensing device 130 can also sense changes in temperature based on the pyroelectric effect, and then convert the changes in temperature into temperature electrical signals. In this way, the sensing device 130 does not require an additional power supply. The battery pack tray device has a simple structure. During the driving of the vehicle, when the bottom guard plate 120 is impacted, the sensing device 130 can sense the sensing signal.

[0057] When the temperature of the tray 110 changes while the vehicle is traveling, the sensor device 130 will also sense a sensing signal.

[0058] The sensing signal includes a force electric signal indicating a change in impact force (including the impact force exerted on the bottom guard plate 120 ), and a temperature electric signal indicating a change in temperature (a change in the temperature of the tray 110 ).

[0059] The vehicle is provided with a controller (not shown). The controller can be connected to the connector 140 described later via a wire, and then electrically connected to the sensor device 130. In this way, the controller can obtain the sensing signal in real time. The controller can determine the degree of damage to the bottom guard plate 120 and the tray 110 based on the sensing signal, and then remind the driver to replace one or both of the bottom guard plate 120 and the tray 110 when they are damaged. Figure 5 As shown, preferably, the surface of the tray 110 facing the bottom guard plate 120 is recessed away from the bottom guard plate 120 to form a mounting groove 113. The sensor device 130 is located in the mounting groove 113. The sensor device 130 abuts against the bottom surface of the mounting groove 113. Thus, the installation of the sensor device 130 is facilitated. In addition, the sensor device 130 can be protected.

[0060] Please continue to refer to Figure 3 The surface of the bottom guard plate 120 facing the tray 110 protrudes close to the tray 110 to form a mounting protrusion 121. At least part of the mounting protrusion 121 extends into the mounting groove 113. The mounting protrusion 121 abuts against the sensor device 130. Thus, the installation of the bottom guard plate 120 is convenient.

[0061] Preferably, the battery pack tray device further comprises fasteners (such as screws). The bottom guard plate 120 is detachably connected to the tray 110 via the fasteners. Thus, it is convenient to replace the bottom guard plate 120 and the sensor device 130.

[0062] Preferably, please continue to refer to Figures 1 to 3, the bottom of the mounting groove 113 is the bearing portion 111 of the tray 110. The tray 110 also includes a side wall 112. The side wall 112 is a circumferentially closed annular structure. One end of the side wall 112 is connected to the bearing portion 111 to form a placement cavity 114 for placing the battery pack 150. The battery pack 150 is placed on the bearing portion 111. The projection of the bearing portion 111 on the projection plane covers the projection of the battery pack 150 on the projection plane. As a result, the tray 110 has great strength.

[0063] like Figure 1 and Figure 4 As shown, there is one sensor device 130. In the horizontal direction, the sensor device 130 extends from one end of the bearing portion 111 to the other end. The sensor device 130 covers the entire bottom surface of the mounting groove 113. In this way, the area of ​​the sensor device 130 is large, and the sensing area of ​​the sensor device 130 is large.

[0064] It is understood that in an embodiment not shown, there are multiple sensing devices. In the horizontal direction, the multiple sensing devices are arranged at intervals. Thus, when one sensing device is damaged, the other sensing devices can continue to work.

[0065] Please refer to Figure 2 The sensor device 130 includes an insulating portion 132 and at least two sensing portions 131. The sensing portion 131 can sense the aforementioned force electric signal and temperature electric signal. The at least two sensing portions 131 are sequentially arranged at intervals along the setting direction D1. An insulating portion 132 is arranged between two adjacent sensing portions 131.

[0066] Specifically, the two sensing parts 131 include a first sensing part 135 and a second sensing part 136. Along the direction from the tray 110 toward the bottom guard plate 120, the first sensing part 135, the insulating part 132 and the second sensing part 136 are arranged in sequence. Specifically, the first sensing part 135 and the second sensing part 136 are arranged in sequence and spaced apart along the setting direction D1. The insulating part 132 is arranged between the first sensing part 135 and the second sensing part 136. The first sensing part 135 is located above the second sensing part 136. In this way, the first sensing part 135 is closer to the tray 110 than the second sensing part 136. The first sensing part 135 can sense temperature electrical signals. In other words, the first sensing part 135 is used to sense temperature electrical signals indicating temperature changes of the tray 110.

[0067] The second sensing portion 136 is closer to the bottom guard plate 120 than the first sensing portion 135. The second sensing portion 136 can sense an electrical signal representing force. In other words, the second sensing portion 136 is used to sense an electrical signal representing a change in the impact force on the bottom guard plate 120.

[0068] The side end of the sensor device 130 is an end of the sensor device 130 along the setting direction D1.

[0069] Therefore, the impact on the bottom guard plate 120 and the temperature of the tray 110 are respectively sensed by different sensing parts 131 , so that the impact on the bottom guard plate 120 and the temperature of the tray 110 can be sensed more accurately.

[0070] The insulating portion 132 is an insulating and heat-insulating member made of an insulating and heat-insulating material. The insulating portion 132 can separate the first sensing portion 135 and the second sensing portion 136 to avoid electrical conduction between the first sensing portion 135 and the second sensing portion 136, and to avoid mutual influence of the signals sensed by the first sensing portion 135 and the second sensing portion 136, so as to more accurately sense the impact on the bottom guard plate 120 and the temperature of the tray 110. The insulating portion 132 can also reduce the heat transfer between the first sensing portion 135 and the second sensing portion 136.

[0071] In the present embodiment, the arrangement of the first sensing part 135, the second sensing part 136 and the insulating part 132 can sense the temperature electrical signal indicating the temperature change of the tray 110 through the first sensing part 135, and sense the force electrical signal indicating the change of the impact force exerted on the bottom guard plate 120 through the second sensing part 136, thereby avoiding electrical conduction between the first sensing part 135 and the second sensing part 136, and further avoiding the signals sensed by the first sensing part 135 and the second sensing part 136 from influencing each other, and can more accurately sense the impact exerted on the bottom guard plate 120 and the temperature of the tray 110.

[0072] Preferably, the sensing part 131 may be a piezoelectric-pyroelectric composite film. The piezoelectric-pyroelectric composite film may be made of a material having dual sensitive characteristics of piezoelectric effect and pyroelectric effect. Specifically, the first sensing part 135 and the second sensing part 136 are both polyvinylidene fluoride (PVDF) and its binary copolymer, or the first sensing part 135 and the second sensing part 136 are both polyvinylidene fluoride and its ternary copolymer. For example, the material of at least one of the first sensing part 135 and the second sensing part 136 may be a copolymer of polyvinylidene fluoride and hexafluoropropylene (PVDF-HFP), a copolymer of vinylidene fluoride and trifluoroethylene (PVDF-TrFE), a copolymer of vinylidene fluoride and chloroethylene fluoride

[0073] (PVDF-CTFE) or polyvinylidene fluoride, trifluoroethylene and trifluorochloroethylene copolymer (PVDF-TrFE-CTFE). Thus, the processing of the first sensing part 135 and the second sensing part 136 is facilitated.

[0074] Please continue to refer to Figure 2 The sensor device 130 further includes a surface portion 133. The surface portion 133 wraps the insulating portion 132, the first sensing portion 135, and the second sensing portion 136. Thus, the sensing portion 131 can be protected and contact with the sensing portion 131 by air, moisture, dust, etc. can be reduced.

[0075] The surface layer 133 is a flexible outer lining. Further, the surface layer 133 is a plastic part or a silicone rubber part. Thus, the processing of the surface layer 133 is convenient.

[0076] Furthermore, the surface layer 133 is a polyester resin (PET, Polyethylene terephthalate) member or the surface layer 133 is a polyimide (PI, Polyimide) member.

[0077] The sensing device 130 also includes an electrode portion 134. The electrode portion 134 includes a first electrode portion 137 and a second electrode portion 138. The first electrode portion 137 is connected to the first sensing portion 135. The second electrode portion 138 is connected to the second sensing portion 136. The electrode portion 134 includes a positive electrode and a negative electrode. Each sensing portion 131 is connected to a positive electrode and a negative electrode. The battery pack tray device also includes a connector 140. The connector 140 is connected to the bottom guard plate 120 or the tray 110. The tray 110 has a mounting hole. The first electrode portion 137 and the second electrode portion 138 are both penetrated in the mounting hole. The first electrode portion 137 and the second electrode portion 138 are both connected to the connector 140 after passing through the mounting hole. In this way, the electrical signal sensed by the sensing portion 131 can be transmitted to the connector 140 via the electrode portion 134. The aforementioned controller can be connected to the connector 140 via a wire. As a result, it is convenient to connect the controller.

[0078] The battery pack 150 is provided with a voltage collection signal line for collecting a voltage signal of the battery pack 150. The plug connector 140 is also used to be electrically connected to the voltage collection signal line of the battery pack 150. Thus, the structure of the battery pack provided with the battery pack tray device is simple.

[0079] Preferably, the plug connector 140 is located at the side of the tray 110 in the horizontal direction. The plug connector 140 is connected to the tray 110. Thus, the impact on the plug connector 140 can be reduced.

[0080] The utility model also provides a battery pack. The battery pack includes:

[0081] a battery pack 150; and

[0082] The aforementioned battery pack tray device.

[0083] In this embodiment, the battery pack includes the aforementioned battery pack tray device. The arrangement of the first sensing part 135, the second sensing part 136 and the insulating part 132 can sense the temperature electrical signal indicating the temperature change of the tray 110 through the first sensing part 135, and sense the force electrical signal indicating the change of the impact force exerted on the bottom guard plate 120 through the second sensing part 136, thereby avoiding conduction between the first sensing part 135 and the second sensing part 136, and further avoiding the signals sensed by the first sensing part 135 and the second sensing part 136 from influencing each other, and can more accurately sense the impact exerted on the bottom guard plate 120 and the temperature of the tray 110.

[0084] The utility model also provides an electric device, which includes the above-mentioned battery pack.

[0085] In the present embodiment, the electrical equipment includes the aforementioned battery pack, and the battery pack includes the aforementioned battery pack tray device. The arrangement of the first sensing part 135, the second sensing part 136 and the insulating part 132 can sense the temperature electrical signal indicating the temperature change of the tray 110 through the first sensing part 135, and sense the force electrical signal indicating the change of the impact force exerted on the bottom guard plate 120 through the second sensing part 136, thereby avoiding conduction between the first sensing part 135 and the second sensing part 136, and further avoiding the signals sensed by the first sensing part 135 and the second sensing part 136 from influencing each other, and can more accurately sense the impact exerted on the bottom guard plate 120 and the temperature of the tray 110.

[0086] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

[0087] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "component" and the like appearing herein may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing herein may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

Claims

1. A battery pack tray device, characterized in that: The battery pack tray device comprises: A tray, the tray being used to carry a battery pack; a bottom guard plate, the bottom guard plate being located on a side of the tray facing away from the battery pack; and The sensing device is located between the tray and the bottom guard plate. The sensing device is provided with a first sensing part, an insulating part and a second sensing part in sequence in the direction from the tray toward the bottom guard plate. The first sensing part is used to sense a temperature electrical signal indicating a temperature change, and the second sensing part is used to sense a force electrical signal indicating a force change.

2. The battery pack tray device according to claim 1, characterized in that: The sensing device is attached to the tray and to the bottom guard plate.

3. The battery pack tray device according to claim 1, characterized in that: The surface of the tray facing the bottom guard plate is recessed away from the bottom guard plate to form a mounting groove, and the sensor device is located in the mounting groove.

4. The battery pack tray device according to claim 3, characterized in that: The surface of the bottom guard plate facing the tray protrudes close to the tray to form a mounting protrusion, and the mounting protrusion at least partially extends into the mounting groove.

5. The battery pack tray device according to claim 1, characterized in that: There are multiple sensing devices, and the multiple sensing devices are arranged at intervals, or The tray has a bearing portion, and the bearing portion is used to place the batteries of the battery pack. Along the horizontal direction, the sensor device extends from one end of the bearing portion to the other end.

6. The battery pack tray device according to claim 1, characterized in that: At least one of the first sensing part and the second sensing part is a polyvinylidene fluoride member and a binary copolymer member thereof, or a polyvinylidene fluoride member and a ternary copolymer member thereof.

7. The battery pack tray device according to claim 1, characterized in that: The sensor device further includes a surface portion, and the surface portion wraps the insulating portion, the first sensing portion, and the second sensing portion.

8. The battery pack tray device according to claim 7, characterized in that: The surface layer is a plastic part or a silicone rubber part.

9. The battery pack tray device according to claim 1, characterized in that: The sensing device further includes a first electrode portion connected to the first sensing portion, and a second electrode portion connected to the second sensing portion. The battery pack tray device further includes a connector, and the first electrode portion and the second electrode portion are both connected to the connector.

10. The battery pack tray device according to claim 9, characterized in that: The connector is also used to be electrically connected to a voltage collection signal line of the battery pack.

11. The battery pack tray device according to claim 9, characterized in that: The plug-in connector is located on the side of the tray along the horizontal direction.

12. A battery pack, characterized in that: The battery pack comprises: Battery packs; and A battery pack tray device according to any one of claims 1 to 11.

13. An electrical equipment, characterized in that: The electric device comprises the battery pack according to claim 12.

Images