Charging and swapping system for detachable battery pack

Abstract

A charging and swapping system for a detachable battery pack includes a battery pack (1) and a support plate (2). The battery pack (1) includes a casing (11) and a battery unit arranged in the casing (11). The support plate (2) is configured to have a detachable connection with the battery pack (1). The support plate (2) is separated from the battery pack (1) through the detachable connection when the battery pack (1) is to be replaced on a vehicle or when charging of the battery pack at a charging station is completed. Quick disconnection and installation of the battery pack (1) and the support plate (2) are realized through the detachable connection, thereby improving user experience when the vehicle requires battery charging or swapping.

Description

Removable battery pack charging and swapping system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number "202121765703.5" filed by BYD Co., Ltd. on July 30, 2021, entitled "Charging and swapping system for a detachable battery pack". Technical Field

[0003] This application relates to the field of vehicle technology, in particular to a charging and swapping system for a detachable battery pack. Background Art

[0004] With the development of society, in order to save energy and reduce the emission of harmful environmental substances, more and more fuel vehicles / gasoline vehicles are being replaced by electric vehicles, and the number of electric vehicles is constantly increasing. Currently, most new energy electric vehicles are charged using fixed charging stations. Existing charging stations can charge with AC or DC, but regardless of the method used, the charging vehicle must wait until the charging is complete before driving. When the vehicle needs to be fast-charged, the electric vehicle needs to adopt a cooling system with higher heat dissipation power. On the one hand, this increases the cost of the entire vehicle and takes up space. On the other hand, the heat dissipation structure of the battery system becomes more complex. At low temperatures, in order to meet the fast charging requirements of the electric vehicle, more electrical power is needed to meet the heating rate of the battery system, resulting in increased energy consumption and the risk of reduced driving range. Existing electric vehicle battery pack fast-charging solutions do not yet meet user needs.

[0005] Summary of the Invention

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, the present application proposes a charging and swapping system for a detachable battery pack.

[0008] The charging and swapping system for a detachable battery pack according to the present application includes a battery pack and a support plate, wherein the battery pack includes a box body and battery cells, and the battery cells are placed in the box body; the support plate is used to be detachably connected to the battery pack, and when the battery pack needs to be replaced on the vehicle or charging is completed at the charging station, the support plate is separated from the battery pack through the detachable connection.

[0009] The charging and swapping system of the detachable battery pack in this application realizes the rapid disassembly and installation of the battery pack and the support plate by setting a detachable connection method. When the vehicle needs to replace the battery, the battery pack that needs to be replaced on the vehicle is quickly removed and replaced with the charged battery pack, and the charged battery pack is quickly installed on the vehicle. This can substantially reduce the waiting time for charging the battery pack and improve the user's charging experience of charging the battery pack.

[0010] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic structural diagram of a charging and swapping system for a detachable battery pack provided in one embodiment of the present application.

[0012] FIG2 is a schematic structural diagram of a charging and swapping system for a detachable battery pack provided in yet another embodiment of the present application.

[0013] FIG3 is a schematic structural diagram of a charging and swapping system for a detachable battery pack provided in another embodiment of the present application. DETAILED DESCRIPTION

[0014] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0015] The battery pack of the present application is described in detail below with reference to the accompanying drawings. The charging and swapping system of the detachable battery pack provided in the embodiment of the present application includes a battery pack 1 and a support plate 2, wherein the battery pack 1 includes a box 11 and battery cells, and the battery cells are placed in the box 11; the support plate 2 is used to be detachably connected to the battery pack 1, and when the battery pack 1 needs to be replaced on the vehicle or is fully charged at the charging station, the support plate 2 is separated from the battery pack 1 through the detachable connection.

[0016] Among them, the support plate 2 can be set on the charging base for thermal management connection between the charging base and the battery pack 1; the support plate 2 can also be set on the vehicle frame for installation and charging and discharging conditions of the battery pack 1, or for protection of the battery pack.

[0017] The charging and swapping system of the detachable battery pack in the embodiment of the present application realizes the rapid disassembly and installation of the battery pack and the support plate by setting a detachable connection method. When the vehicle needs to replace the battery, the battery pack that needs to be replaced on the vehicle is quickly removed through the detachable connection, and the charged battery pack is replaced, and the charged battery pack is quickly installed on the vehicle. This can substantially reduce the charging waiting time of the battery pack and improve the user's charging experience of charging the battery pack.

[0018] The detachable connection in the embodiments of the present application can be implemented in a variety of ways. For example, the detachable connection can be achieved by mechanical limiting through structural design, or by a snap-on structure, or by bolt connection. In addition, the normal strength of the colloid can be ensured by colloid bonding within the normal temperature range of the battery system or during normal vehicle driving to achieve an effective connection between the battery pack and the support plate; and when certain conditions are met, the colloid bonding performance is weakened to achieve separation after connection. The specific structure and disassembly method of the detachable connection in the present application are given below in conjunction with specific embodiments.

[0019] As an embodiment of a detachable connection, the housing 11 and the support plate 2 can be connected to each other by providing a groove on one of them and a protrusion on the other. For example, the housing 11 may be provided with a groove 3 and the support plate 2 may be provided with a boss 4, or the housing 11 may be provided with a boss 4 and the support plate 2 may be provided with a groove 3. Regardless of the arrangement, the boss 4 must cooperate with the groove 3, as shown in FIG1 .

[0020] In the embodiment of the present application, there is no restriction on the specific shape of the boss 4 and the groove 3. The settings of the two can meet the requirements of mutual cooperation as long as a detachable connection can be achieved. For example, the boss 4 can be arranged in a straight line or a cross shape, and the groove 3 can also be arranged in a straight line or a cross shape. In order to achieve a more stable connection, a plurality of cross-shaped grooves 3 or boss 4 structures can be adopted. The positions of the bosses 4 and grooves 3 in the embodiment of the present application can be set at a certain distance, or they can be set in the middle position and edge position of the support plate 2 and the box body 11. The specific number of bosses 4 and grooves 3 in the embodiment of the present application is not limited.

[0021] As an embodiment of a detachable connection, a sliding rail can be provided on the housing 11, and a protrusion can be provided on the support plate 2. The protrusion cooperates with the sliding rail and can slide on the sliding rail. When the battery pack 1 needs to be replaced or charging is completed, the support plate 2 slides out on the sliding rail via the protrusion to achieve rapid separation from the battery pack 1. This arrangement of the guide rail groove 3 can achieve a more automated detachable connection between the battery pack 1 and the support plate 2. The support plate 2 can slide on the guide rail, and a drive device for driving the guide rail can also be provided. In this way, when the battery pack 1 and the support plate 2 need to be separated, the drive device can be activated to achieve effective separation.

[0022] As an embodiment of a detachable connection, a limiting groove 5 is provided on the edge of the support plate 2, and a flange that cooperates with the limiting groove 5 is provided on the edge of the box body 11. In this way, by setting the limiting groove 5 and the mechanical limiting method of the flange at the edge position, the support plate and the battery pack 1 are partially clamped, which can make the connection between the support plate 2 and the battery pack 1 more secure.

[0023] In the embodiment of the present application, the support plate 2 and the battery pack 1 are connected via a detachable colloid, which can be separated from the battery pack 1 under preset conditions. The colloid in the embodiment of the present application needs to meet certain conditions so that the colloid can adhere to the desired objects when adhesion is required, and can separate the two objects that have been adhered by the colloid when disassembly is required. As long as the colloid can achieve controllable adhesion and separation, it can be used, and this application does not impose specific restrictions on this.

[0024] The method for controlling the separation of the battery pack 1 and support plate 2 can be determined based on the characteristics of the colloid. For example, separation can be achieved using a disintegrating agent, or by controlling the colloid temperature to a certain value, thereby weakening the colloid's adhesive strength and achieving separation. For example, some colloids are temperature-sensitive, and when the temperature exceeds a preset value, the adhesive strength can be weakened, thereby achieving separation of the battery pack 1 and support plate 2. During the separation process of two objects bonded by the colloid, it is necessary to ensure that the battery pack 1 and support plate 2 are not damaged as much as possible.

[0025] Threaded holes 6 can also be provided on the box 11 and support plate 2, allowing them to be detachably connected via bolts. Specifically, a circle of threaded holes 6 can be machined around the corresponding edges of the box 11 and support plate 2. The bolts are then installed on the box 11 and support plate 2 with a certain preload.

[0026] The detachable connection between the battery pack 1 and the support plate 2 in the embodiment of the present application can be used to facilitate removal of the battery pack 1 from the vehicle or to facilitate quick removal of the battery pack 1 from the charging station. In other words, the support plate 2 in the embodiment of the present application can be mounted on the vehicle and detachably connected to the battery pack 1, or it can be mounted on the charging base of the charging station and detachably connected to the battery pack 1.

[0027] When the battery pack 1 is installed on a vehicle, the support plate 2 is a vehicle component, such as a chassis or floor. When the battery pack 1 is placed on a charging base of a charging station outside the vehicle, the support plate 2 can be a part of the charging base.

[0028] The support plate 2 in the embodiment of the present application can be a separately provided component, or it can be a reused existing structural component. For example, the support plate 2 can be at least one of the cooling plate 21, the protective plate 22, the heating pad and the thermal insulation plate 23, or it can integrate the functions of at least two of the cooling plate 21, the protective plate 22, the heating pad and the thermal insulation plate 23. It can also be a separate support plate 2, and at least one of the cooling plate 21, the protective plate 22, the heating pad and the thermal insulation plate 23 is connected to the battery pack 1, and a groove 3 or a protrusion is provided on the battery pack 1. The groove 3 or the protrusion can be provided on the cooling plate 21, the protective plate 22, the heating pad or the thermal insulation plate 23 integrated therewith. The embodiment of the present application does not limit which existing mechanism is specifically adopted by the support plate 2 or whether it is re-set, as long as the structure of the support plate 2 can be detachably connected to the battery pack 1.

[0029] After the battery pack 1 is removed from the vehicle, it can be directly placed on the charging base of the charging station and electrically connected to the charging device to charge the battery pack 1. In other words, the charging and swapping system for the detachable battery pack 1 also includes a charging device, and the charging device is electrically connected to the battery pack 1 when the battery pack 1 is charging at the charging station.

[0030] When the battery pack of an electric vehicle is disassembled for charging and battery replacement, the support plate includes a first support plate on the electric vehicle and may also include a second support plate on the charging station. The first support plate is detachably connected to the battery pack to achieve rapid disassembly from the battery pack that needs to be charged, and to achieve rapid installation of another charged battery pack. The second support plate is detachably connected to the battery pack to achieve rapid installation of the battery pack that needs to be charged, and to achieve rapid disassembly from another charged battery pack when charging is completed. In other words, the first support plate is used to achieve the separation of the feed battery pack from the vehicle and the installation of the fully charged battery pack on the vehicle. The charging base may include a second support plate for achieving the purpose of quickly connecting the battery pack to the charging base. In addition, the charging station may not be provided with a second support plate, and the battery pack to be charged can be directly placed on the charging base of the charging station without fixation. For example, when the upper surface of the charging base is a plane and the lower surface of the battery pack case is a groove structure or a plane, the second support plate can be omitted.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means more than two, unless otherwise specifically defined.

[0033] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0036] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A charging and swapping system for a detachable battery pack, characterized in that: include: A battery pack, comprising a box and battery cells, wherein the battery cells are placed in the box; A support plate is used to be detachably connected to the battery pack. When the battery pack needs to be replaced on the vehicle or is fully charged at a charging station, the support plate is separated from the battery pack through the detachable connection.

2. The charging and swapping system for a detachable battery pack according to claim 1, characterized in that: The box body is provided with a groove, and the support plate is provided with a boss, or the box body is provided with a boss, and the support plate is provided with a groove; the boss is matched with the groove.

3. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 2, characterized in that: The bosses are arranged in a straight line or a cross shape, and the grooves are arranged in a straight line or a cross shape.

4. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 3, characterized in that: The box body is provided with a sliding guide rail; A protrusion is provided on the support plate, and the protrusion cooperates with the sliding guide rail. The protrusion can slide on the sliding guide rail. When the battery pack needs to be replaced or charging is completed, the support plate slides out on the sliding guide rail through the protrusion to achieve rapid separation from the battery pack.

5. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 4, characterized in that: The edge of the support plate is provided with a limiting groove, and the edge of the box body is provided with a flange that matches the limiting groove.

6. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 5, characterized in that: The support plate and the battery pack are connected via a detachable colloid, and the detachable colloid can realize the separation of the battery pack and the support plate under preset conditions.

7. The charging and swapping system for a detachable battery pack according to claim 6, characterized in that: The battery pack and the support plate are separated by using a disintegrator, or by controlling the colloid temperature to reach a certain value or above to weaken the colloid bonding strength, thereby separating the battery pack and the support plate.

8. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 7, characterized in that: Threaded holes are provided on the box body and the support plate, and the box body and the support plate are detachably connected by bolts.

9. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 8, characterized in that: The battery pack is installed on a vehicle, and the support plate is a chassis or a floor; or, when the battery pack is placed on a charging base of a charging station outside the vehicle, the support plate is a part of the charging base.

10. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 9, characterized in that: The support plate is at least one of a cooling plate, a protection plate and a heat preservation plate, or the support plate integrates the functions of at least two of the cooling plate, the protection plate and the heat preservation plate.

11. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 10, characterized in that: It also includes a charging device, which is electrically connected to the battery pack when the battery pack is charged at a charging station.

12. The charging and swapping system for a detachable battery pack according to any one of claims 1 to 11, characterized in that: The support plate includes a first support plate and a second support plate, the first support plate is placed on the vehicle, and the second support plate is placed on the charging station; The detachable connection between the first support plate and the battery pack is used to achieve rapid removal from the battery pack to be charged, and to achieve rapid installation with another charged battery pack; The detachable connection between the second support plate and the battery pack is used to achieve rapid installation with the battery pack to be charged, and rapid removal from another battery pack to be charged when charging is completed.

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