Battery pack, battery device, and electric device

Abstract

The utility model discloses a kind of battery pack, battery device and electric equipment, the battery pack includes: multiple electric core, multiple the electric core is stacked along the thickness direction arrangement;Two pressing plates, two the pressing plate is spaced along the thickness direction arrangement and between two for placing multiple the electric core;Restraint adjusting mechanism, the restraint adjusting mechanism is connected with two the pressing plate, for dynamically adjusting the restraint force of two the pressing plate to multiple the electric core. The distance between two pressing plates is adjusted in real time by restraint adjusting mechanism, dynamic restraint force can be provided to multiple electric core, pressing plate can compact the electric core of different specification tray, universal design is realized.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a battery pack, battery device and electrical equipment. Background Technology

[0002] In related technologies, battery restraint devices have complex structures, typically requiring multiple pushing components, which in turn need to cooperate with driving components. Furthermore, existing restraint devices provide relatively low pushing force, cannot be flexibly adjusted, and only provide pushing force in one direction, resulting in uneven force distribution on the battery. Additionally, the devices are inflexible, only able to push a fixed number of batteries within a specific tray size; they fail when the tray size or the number of batteries changes. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that, through a restraint adjustment mechanism, can adjust the distance between two pressure plates in real time, providing dynamic restraint force to multiple battery cells. The pressure plates can press down battery cells on trays of different specifications, achieving a universal design.

[0004] This utility model also proposes a battery device.

[0005] This utility model also proposes an electrical device.

[0006] A battery pack according to a first aspect of the present invention includes: a plurality of battery cells stacked along the thickness direction; two pressure plates spaced apart along the thickness direction and used to place the plurality of battery cells between them; and a restraint adjustment mechanism connected to the two pressure plates for dynamically adjusting the restraint force of the two pressure plates on the plurality of battery cells.

[0007] According to the battery pack of this utility model embodiment, two pressure plates respectively press the two sides of multiple battery cells, making the restraint force applied to the battery cells more even. Furthermore, the distance between the two pressure plates is adjusted in real time by a restraint adjustment mechanism to provide dynamic restraint force to the multiple battery cells. The pressure plates can press battery cells of different specifications, achieving a universal design.

[0008] According to some embodiments of this utility model, the restraint adjustment mechanism includes a connecting assembly, which includes: a transmission wheel, the transmission wheel being disposed on the side of one pressure plate away from the other pressure plate; a plurality of pulleys, the pressure plates being equipped with a plurality of pulleys with the pulleys of the two pressure plates corresponding to each other; a connecting member, the fixed end of the connecting member being connected to the transmission wheel, the connecting member extending from the fixed end and sequentially winding around the first pulley of the pressure plates that are far apart, the first pulley of the pressure plates that are close together, and so on, the connecting member sequentially and alternately winding around the plurality of pulleys on the two pressure plates until it winds around the last pulley and then connects.

[0009] According to some embodiments of the present invention, the transmission wheel includes a gear and a spool, the gear is sleeved on the spool and fixedly connected to the spool, and the fixed end of the connector is connected to the spool.

[0010] According to some embodiments of the present invention, there are at least two connecting members, and the fixed ends of the at least two connecting members are respectively connected to both ends of the roll along the length direction; and, multiple pulleys are respectively installed at both ends of the pressure plate along the length direction of the roll, and the multiple pulleys at the same end of the two pressure plates correspond to each other, at least one connecting member is alternately wound around the multiple pulleys at one end of the two pressure plates along the length direction of the roll, and at least another connecting member is alternately wound around the multiple pulleys at the other end of the two pressure plates along the length direction of the roll.

[0011] According to some embodiments of the present invention, multiple pulleys are respectively installed at both ends of the pressure plate along the length direction and / or width direction.

[0012] According to some embodiments of the present invention, the plurality of pulleys of the two pressure plates are arranged opposite each other along the thickness direction.

[0013] According to some embodiments of the present invention, the restraint adjustment mechanism further includes a drive assembly, which includes a drive member that is drivenly connected to the transmission wheel to provide output torque.

[0014] According to some embodiments of the present invention, the drive assembly further includes: a reducer, the reducer being driven by the drive member and the reducer being driven by the transmission wheel.

[0015] According to some embodiments of the present invention, the drive motor is at least one; and / or, the reducer is at least one; and / or, the transmission wheel is at least one.

[0016] According to some embodiments of the present invention, the battery pack further includes: a controller and a force sensor. The controller is electrically connected to the restraint adjustment mechanism and the force sensor, respectively. The force sensor is used to monitor the restraint force on the plurality of battery cells. The controller is configured to determine whether the restraint force on the plurality of battery cells exceeds a target value based on the force signal monitored by the force sensor and control the output torque of the restraint adjustment mechanism.

[0017] The battery device according to a second aspect of the present invention includes the aforementioned battery pack.

[0018] The electrical device according to a third aspect of the present invention includes the aforementioned battery pack.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a first-view structural schematic diagram of the battery pack according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the restraint force of the battery pack according to an embodiment of the present utility model;

[0023] Figure 3 This is a structural schematic diagram of the battery pack according to an embodiment of the present utility model from a second perspective;

[0024] Figure 4 This is a control flowchart of the battery pack according to an embodiment of the present utility model.

[0025] Figure label:

[0026] 1. Battery cell; 2. Pressure plate; 3. Drive wheel; 31. Gear; 32. Reel; 4. Pulley; 5. Connector; 6. Drive component; 7. Reducer. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0028] The following is for reference. Figures 1-4 This invention describes a battery pack according to an embodiment of the present invention.

[0029] like Figures 1-3As shown, the battery pack includes: multiple battery cells 1, two pressure plates 2, and a restraint adjustment mechanism.

[0030] Multiple battery cells 1 are stacked along the thickness direction. Two pressure plates 2 are spaced apart along the thickness direction, and the space between them is used to place multiple battery cells 1. A restraint adjustment mechanism is connected to the two pressure plates 2 and is used to dynamically adjust the restraint force of the two pressure plates 2 on the multiple battery cells 1.

[0031] In other words, multiple battery cells 1 are stacked parallel to each other in the thickness direction to form a regular integral structure. These cells 1 can be placed between two pressure plates 2, with the pressure plates 2 positioned on opposite sides of the integral structure along its thickness direction. Then, the distance between the two pressure plates 2 is adjusted using a restraint adjustment mechanism to provide dynamic restraint force to the multiple battery cells 1. Finally, after being pressed together, the multiple battery cells 1 can be fixedly installed into a tray, thus facilitating the next process. Specifically, the pressed battery cells 1 can be fixed into the tray using a pressing fixture or by riveting or welding.

[0032] This configuration, with two pressure plates 2 pressing against the surfaces of adjacent battery cells 1, simultaneously applies pressure to both sides of multiple battery cells 1, resulting in a more balanced restraint force applied to the cells 1. Furthermore, the distance between the two pressure plates 2 can be adjusted in real-time via a restraint adjustment mechanism, providing superior restraint force as needed, i.e., dynamic restraint force for multiple battery cells 1. Additionally, the size of the pressure plates 2 can accommodate different tray sizes, enabling the pressing process on battery cells 1 on trays of various sizes, thus achieving a universal design.

[0033] It should be noted that the thickness direction of cell 1 and the thickness direction of pressure plate 2 are in the same direction.

[0034] Therefore, by pressing the two pressure plates 2 against both sides of multiple battery cells 1 respectively, the restraint force applied to the battery cells 1 is more even. Furthermore, by adjusting the distance between the two pressure plates 2 in real time through the restraint adjustment mechanism, dynamic restraint force is provided to the multiple battery cells 1, and the pressure plates 2 can press the battery cells 1 of different specifications of trays, thus realizing a universal design.

[0035] According to some embodiments of this utility model, such as Figures 1-3 As shown, the restraint adjustment mechanism includes a connecting assembly, which includes: a transmission wheel 3, multiple pulleys 4, and a connecting member 5.

[0036] The drive wheel 3 is located on the side of one pressure plate 2 away from the other pressure plate 2. Multiple pulleys 4 are mounted on each pressure plate 2, and the pulleys 4 of the two pressure plates 2 correspond to each other. The fixed end of the connecting member 5 is connected to the drive wheel 3. The connecting member 5 extends from the fixed end and sequentially winds around the first pulley 4 of the pressure plate 2 that is far apart, the first pulley 4 of the pressure plate 2 that is close together, and so on. The connecting member 5 alternately winds around the multiple pulleys 4 on the two pressure plates 2 until it winds around the last pulley 4 and connects to it.

[0037] Specifically, the drive wheel 3 is located on the side of one pressure plate 2 away from the other pressure plate 2, and the drive wheel 3 is close to one end of the pressure plate 2. Multiple pulleys 4 are installed on each pressure plate 2, and the multiple pulleys 4 on the two pressure plates 2 correspond to each other along the thickness direction. The fixed end of the connector 5 is connected to the drive wheel 3. The connector 5 extends from the fixed end and sequentially winds around the first pulley 4 of the pressure plate 2 that is farther away, the first pulley 4 of the pressure plate 2 that is closer, the second pulley 4 of the pressure plate 2 that is farther away, the second pulley 4 of the pressure plate 2 that is closer, the third pulley 4 of the pressure plate 2 that is farther away, and so on, alternatingly winding around the multiple pulleys 4 on the two pressure plates 2 until it winds around the last pulley 4 and connects to the last pulley 4.

[0038] See Figure 2 As shown, the drive wheel 3 rotates, causing the connector 5 to gradually be wound around it. At this time, the two pressure plates 2 move closer to each other, applying a strong restraining force to the multiple battery cells 1, thereby gradually pressing the multiple battery cells 1 together. After the battery cells 1 are pressed together, the drive wheel 3 rotates in the opposite direction, causing the two pressure plates 2 to move away from each other, thus allowing the multiple battery cells 1 to be removed.

[0039] Thus, by considering the transmission wheel 3 as a fixed pulley 4 and the multiple pulleys 4 on the pressure plate 2 as movable pulleys 4, the force-saving principle of combining the movable and fixed pulleys 4 reduces the tension requirement on the connecting member 5, making the overall structure of the restraint adjustment device simpler. Furthermore, with multiple pulleys 4 fixed to the pressure plate 2, the restraint force applied to the battery cell 1 by the two surfaces of the two pressure plates 2 is more even. Additionally, by increasing the number of pulleys 4, the force required to pulley 5 can be reduced significantly, thanks to the force-saving principle of combining the movable and fixed pulleys 4.

[0040] In some embodiments, connector 5 may be a pull cord or a connecting strap, including but not limited to these.

[0041] According to some embodiments of this utility model, the transmission wheel 3 includes a gear 31 and a scroll 32. The gear 31 is sleeved on the scroll 32 and fixedly connected to the scroll 32. The fixed end of the connecting member 5 is connected to the scroll 32. Specifically, as shown... Figure 1 and Figure 3As shown, gear 31 is fixed to the reel 32. By driving gear 31 to rotate forward or reverse, the connecting piece 5 is wound onto the reel 32 or gradually unwound from the reel 32.

[0042] According to some embodiments of this utility model, there are at least two connecting members 5, and the fixed ends of at least two connecting members 5 are respectively connected to both ends of the scroll 32 along the length direction. Furthermore, multiple pulleys 4 are respectively installed at both ends of the pressure plate 2 along the length direction of the scroll 32, and the multiple pulleys 4 at the same end of the two pressure plates 2 correspond to each other. At least one connecting member 5 is alternately wound around the multiple pulleys 4 at one end of the two pressure plates 2 along the length direction of the scroll 32, and at least another connecting member 5 is alternately wound around the multiple pulleys 4 at the other end of the two pressure plates 2 along the length direction of the scroll 32.

[0043] See details Figure 3 As shown, a connector 5 is connected to both ends of the scroll 32 along its length. Correspondingly, multiple pulleys 4 are installed at both ends of the two pressure plates 2 along the length of the scroll 32, such that the connectors 5 at both ends of the scroll 32 correspond to the multiple pulleys 4 at both ends of the pressure plates 2. That is, one connector 5 is alternately wound around the multiple pulleys 4 at one end of the two pressure plates 2 along the length of the scroll 32, and the other connector 5 is alternately wound around the multiple pulleys 4 at the other end of the two pressure plates 2 along the length of the scroll 32.

[0044] This configuration allows multiple pulleys 4 to act simultaneously on both ends of the pressure plate 2, which in turn allows the pressure plate 2 to push the battery cell 1 as a whole, making the restraining force applied to the battery cell 1 more balanced, thereby achieving a more effective pressing effect.

[0045] Furthermore, multiple pulleys 4 are installed at both ends of the pressure plate 2 along its length and / or width. This configuration allows for the installation of multiple pulleys 4 at both ends of the pressure plate 2 along its length, depending on actual needs. Figure 1 and Figure 3 The embodiment shown. Alternatively, multiple pulleys 4 can be installed at both ends of the pressure plate 2 along the width direction. Or, multiple pulleys 4 can be installed at both ends of the pressure plate 2 along the length and width directions, that is, pulleys 4 can be installed around the entire perimeter of the pressure plate 2. This arrangement allows the pressure plate 2 to be subjected to tension around its entire perimeter, thus better pressing the battery cell 1 with the pressure plate 2 as a whole, achieving compression.

[0046] According to some embodiments of this utility model, multiple pulleys 4 of the two pressure plates 2 are arranged opposite each other along the thickness direction.

[0047] It is understandable that the multiple pulleys 4 on the two pressure plates 2 can be arranged one-to-one relative to each other along the thickness direction, as in the embodiment of this utility model. This can avoid tension loss and improve the output efficiency of tension.

[0048] According to some embodiments of the present invention, the restraint adjustment mechanism further includes a drive assembly, which includes a drive member 6, which is drivenly connected to the transmission wheel 3 to provide output torque.

[0049] like Figure 1 As shown, different power levels of the drive component 6 can be selected according to design requirements. For example, the drive component 6 can be a motor, which is connected to the transmission wheel 3. The motor drives the transmission wheel 3 to rotate, so that the torque provided by the drive component 6 is transmitted to the connector 5 through the transmission wheel 3, thereby providing tension to the connector 5, which in turn acts on multiple pulley sets 4 to realize that the two pressure plates 2 simultaneously push the battery cell 1, thereby providing dynamic restraint force to multiple battery cells 1.

[0050] Furthermore, by adjusting the motor's output voltage or current, different torque outputs can be achieved.

[0051] According to some embodiments of the present invention, the drive assembly further includes: a reducer 7, which is connected to the drive component 6 and is connected to the transmission wheel 3.

[0052] like Figure 1 As shown, the output shaft of the reducer 7 is connected to the transmission wheel 3. The drive component 6 is connected to the reducer 7 via the transmission shaft. The reducer 7 has a reduction ratio, which can amplify the torque output by the drive component 6. Therefore, by selecting a drive component 6 with appropriate power and a reducer 7 with a suitable speed ratio, a large torque output can be achieved, and the magnitude of the restraining force can be controlled by adjusting the torque output of the drive component 6.

[0053] Therefore, by combining the driving component 6 and the reducer 7 to output driving force, a super strong restraining force can be provided according to actual needs.

[0054] According to some embodiments of the present invention, there is at least one drive motor; and / or, there is at least one reducer 7; and / or, there is at least one transmission wheel 3.

[0055] Specifically, there can be two drive components 6, two reducers 7, and two transmission wheels 3. The drive components 6, reducers 7, and transmission wheels 3 are connected one-to-one so that they can work together on the pressure plate 2 through multiple connecting components 5. This can provide stronger restraint force to multiple battery cells 1 and make the restraint force applied to the battery cells 1 more balanced.

[0056] According to some embodiments of the present invention, the battery pack further includes: a controller and a force sensor. The controller is electrically connected to the restraint adjustment mechanism and the force sensor respectively. The force sensor is used to monitor the restraint force on the multiple battery cells 1. The controller is configured to determine whether the restraint force on the multiple battery cells 1 exceeds the target value based on the force signal monitored by the force sensor and control the output torque of the restraint adjustment mechanism.

[0057] Specifically, such as Figure 4 As shown, when multiple battery cells 1 are placed between two pressure plates 2, the controller controls the restraint adjustment mechanism to adjust the distance between the two pressure plates 2, so that the two pressure plates 2 apply restraint force to the multiple battery cells 1. During this period, the force sensor monitors the restraint force on the battery cells 1 in real time and transmits the force signal to the controller. The controller controls the output torque of the restraint adjustment mechanism by judging the difference between the current force signal and the target value. Specifically, if the current force signal exceeds the target value, the restraint force on the battery cells 1 is continuously monitored; if the current force signal does not exceed the target value, the restraint adjustment mechanism is controlled to increase the output torque to increase the restraint force on the battery cells 1 and better achieve the pressing effect of the battery cells 1. In addition to controlling the restraint adjustment mechanism to increase the output torque, the number of pulleys 4 can also be adjusted to increase the restraint force on the battery cells 1.

[0058] Furthermore, by selecting the drive component 6, reducer 7, transmission wheel 3, and pulley 4, the pressure Q that the pressure plate 2 can provide can be determined. The specific calculation method is as follows:

[0059] Assume the force on the connector 5 connected to the scroll 32 is r1, the force connected to r1 is r2, the force connected to r2 is r3, and so on. The forces on the connector 5 are F, F1, F2, F3...F2n, and the pressure generated on the pressure plate 2 is Q, i.e.:

[0060] Q = F + F1 + F2 + F3 + ... + F2n

[0061] F1=Fxη

[0062] F2=Fxη2

[0063] F3=Fxη3 ...

[0064] F2n=Fxη2n

[0065] The efficiency of pulley 4 is η (0.98 is generally taken for rolling bearings).

[0066] Therefore: F+Fxη+Fxη2...+Fxη2n=Q

[0067] We can obtain: F= Q

[0068] Assume the torque of drive component 6 is T, the gear ratio of reducer 7 is k, and the radius of transmission wheel 3 is r.

[0069] Therefore, the following needs to be satisfied: =F

[0070] Right now: Q

[0071] Therefore, by selecting the drive component 6, reducer 7, transmission wheel 3, and pulley 4, the parameter values ​​of T, k, r, and η in the above formula can be determined, and thus the pressure Q that the pressure plate 2 can provide can be determined.

[0072] A battery device according to a second aspect of the present invention includes a battery pack.

[0073] The electrical equipment according to a third aspect of the present invention includes a battery pack.

[0074] Therefore, the battery pack of the battery device or electrical equipment outputs driving force through the combination of drive component 6 and reducer 7, thereby providing a strong restraining force as needed. The principle of labor-saving through the combination of moving and fixed pulleys 4 reduces the tension requirement on the connecting component 5, making the overall structure of the battery pack simpler. Furthermore, by fixing multiple pulley sets 4 to the pressure plate 2, the restraining force applied to the battery cell 1 through the upper and lower pressure plates 2 is more evenly distributed.

[0075] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: Multiple battery cells, wherein the multiple battery cells are stacked along the thickness direction; Two pressure plates are spaced apart along the thickness direction and the space between them is used to place a plurality of the battery cells. A restraint adjustment mechanism is connected to the two pressure plates and is used to dynamically adjust the restraint force of the two pressure plates on the multiple battery cells; The restraint adjustment mechanism includes a connecting component, the connecting component comprising: A drive wheel is disposed on the side of one of the pressure plates away from the other pressure plate; Multiple pulleys are provided, with multiple pulleys mounted on each of the pressure plates and the pulleys of two pressure plates corresponding to each other; A connector, the fixed end of which is connected to the transmission wheel, the connector extending from the fixed end and sequentially winding around the first pulley of the pressure plate that is far apart and the first pulley of the pressure plate that is close together, the connector sequentially and alternately winding around multiple pulleys on the two pressure plates until winding around the last pulley and connecting with the last pulley.

2. The battery pack according to claim 1, characterized in that, The transmission wheel includes a gear and a spool. The gear is sleeved on the spool and fixedly connected to the spool. The fixed end of the connector is connected to the spool.

3. The battery pack according to claim 2, characterized in that, The connector is at least two, and the fixed ends of the at least two connectors are respectively connected to both ends of the reel along its length; and, The pressure plate is equipped with a plurality of pulleys at both ends along the length of the roll, and the plurality of pulleys at the same end of the two pressure plates correspond to each other. At least one connector is alternately wound around the plurality of pulleys at one end of the two pressure plates along the length of the roll, and at least another connector is alternately wound around the plurality of pulleys at the other end of the two pressure plates along the length of the roll.

4. The battery pack according to claim 1, characterized in that, The pressure plate is equipped with multiple pulleys at both ends along its length and / or width.

5. The battery pack according to claim 1, characterized in that, The multiple pulleys of the two pressure plates are arranged opposite each other along the thickness direction.

6. The battery pack according to claim 1, characterized in that, The restraint adjustment mechanism further includes a drive assembly, which includes a drive member that is drivenly connected to the transmission wheel to provide output torque.

7. The battery pack according to claim 6, characterized in that, The drive assembly further includes a reducer, which is connected to the drive component and is also connected to the drive wheel.

8. The battery pack according to claim 7, characterized in that, The driving component is at least one; and / or, the reducer is at least one; and / or, the transmission wheel is at least one.

9. The battery pack according to claim 1, characterized in that, Also includes: The controller is electrically connected to the restraint adjustment mechanism and the force sensor, respectively. The force sensor is used to monitor the restraint force on the multiple battery cells. The controller is configured to determine whether the restraint force on the multiple battery cells exceeds a target value based on the force signal monitored by the force sensor and control the output torque of the restraint adjustment mechanism.

10. A battery device, characterized in that, include: The battery pack according to any one of claims 1-9.

11. An electrical appliance, characterized in that, include: The battery pack according to any one of claims 1-9.

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