Battery pack and energy storage system with same

Abstract

The utility model provides a battery pack and an energy storage system with the same. The battery pack comprises a box body, a battery pack and a battery pack, the battery cell is arranged in the box body; the voltage stabilization assembly comprises a BMS slave controller, the BMS slave controller is electrically connected with the battery cell, and the BMS slave controller is configured to balance the voltage of the battery cell; and the heat exchange part is arranged on one side of the BMS slave controller in the thickness direction, and the BMS slave controller is fixed to the heat exchange part. According to the battery pack disclosed by the utility model, the heat exchange piece is arranged on the voltage stabilization assembly and can be used for carrying out heat exchange on the BMS slave controller, so that the voltage stabilization capability of the voltage stabilization assembly can be effectively improved, the voltage stabilization effect of the voltage stabilization assembly is ensured, and meanwhile, the voltage stabilization assembly can be used for adjusting the output voltage of the single batteries of the battery cells to be consistent; therefore, the service life and the safety performance of the battery pack can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage system manufacturing, in particular to a battery pack and an energy storage system having the same. Background Art

[0002] In existing battery packs, voltage stabilizing components are generally installed to balance the voltage of battery cells within the battery cell. However, when the voltage stabilizing component operates for a long time, overheating of the voltage stabilizing component will cause the voltage stabilizing effect of the voltage stabilizing component to decrease. As a result, the battery pack cannot balance the output voltage, and thus the safety performance of the battery pack cannot be guaranteed. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a battery pack that can ensure safety performance.

[0004] The utility model also provides an energy storage system having the above battery pack.

[0005] According to an embodiment of the present invention, the battery pack includes: a box body; a battery cell, which is arranged in the box body; a voltage stabilizing component, which includes: a BMS slave control, which is electrically connected to the battery cell and configured to balance the voltage of the battery cell; a heat exchanger, which is arranged on one side of the BMS slave control in the thickness direction and the BMS slave control is fixed on the heat exchanger.

[0006] According to the battery pack of the present invention, a heat exchanger is provided on the voltage stabilizing assembly, and the heat exchanger can exchange heat for the BMS slave control, thereby effectively improving the voltage stabilizing ability of the voltage stabilizing assembly and ensuring the voltage stabilizing effect of the voltage stabilizing assembly. At the same time, the voltage stabilizing assembly can adjust the output voltage of the battery cells of the battery cell to be consistent, thereby ensuring the service life and safety performance of the battery pack.

[0007] According to some embodiments of the present invention, the heat exchange element is provided on one side of the box body, the BMS slave controller is provided between the box body and the heat exchange element, and the heat exchange element is connected to the box body.

[0008] According to some optional embodiments of the present invention, the heat exchange element is plate-shaped, one side surface of the heat exchange element in the thickness direction is in contact with the side surface of the box, and the heat exchange element is screwed to the box.

[0009] According to some embodiments of the present invention, a connecting pipe is formed on the heat exchange component, and the connecting pipe is suitable for communicating with the heat exchange flow channel in the box body.

[0010] According to some embodiments of the present invention, an inspection port is provided on a side of the box body facing the voltage stabilizing assembly, and the inspection port passes through the box body along a thickness direction.

[0011] According to some embodiments of the present invention, the BMS slave controller is provided on a side of the heat exchange component away from the battery core, and the BMS slave controller is connected to the box.

[0012] According to some optional embodiments of the present invention, a downwardly recessed mounting groove is formed along the upper end of the box body, and extends from one end of the box body to the other end along a recessed direction perpendicular to the mounting groove, and the voltage stabilizing assembly is arranged in the mounting groove.

[0013] According to some optional embodiments of the present invention, a connecting port is provided on the bottom wall of the mounting groove, and a connecting portion is provided at one end of the BMS slave controller, and the connecting portion passes through the connecting port and is connected to the BMS slave controller.

[0014] According to some embodiments of the present invention, there are multiple BMS slave controls, and the multiple BMS slave controls are arranged at intervals on the heat exchange element.

[0015] An energy storage system according to an embodiment of the second aspect of the present invention includes a battery pack according to the first aspect of the present invention, wherein the battery pack is electrically connected to the battery cell.

[0016] According to the energy storage system of the present invention, by setting the battery pack of the first embodiment above, a heat exchanger is set on the voltage stabilizing component. The heat exchanger can exchange heat for the BMS slave control, thereby effectively improving the voltage stabilizing ability of the voltage stabilizing component and ensuring the voltage stabilizing effect of the voltage stabilizing component. At the same time, the voltage stabilizing component can adjust the output voltage of the battery cells of the battery cell to be consistent, thereby ensuring the service life and safety performance of the battery pack.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 The exploded view of the battery pack shown in FIG. 1 shows the voltage stabilizing component of the first embodiment;

[0020] Figure 3 yes Figure 2 Schematic diagram of the voltage stabilizing assembly shown in;

[0021] Figure 4 yes Figure 1 Schematic diagram of a battery pack at an angle shown in FIG. , wherein the voltage stabilizing component in the figure is the second embodiment;

[0022] Figure 5 yes Figure 4 A schematic diagram of the battery pack from another angle shown in FIG;

[0023] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0024] Reference numerals:

[0025] 100. Battery pack;

[0026] 10. Box body; 11. Mounting slot; 111. Connection port; 12. Inspection port;

[0027] 20. Voltage stabilizing assembly; 21. BMS slave controller; 22. Heat exchange component; 221. Connecting pipe. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, 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 explain the present invention, and should not be construed as limiting the present invention.

[0029] Please refer to the following Figure 1-6 A battery pack 100 according to an embodiment of the present invention is described.

[0030] Reference Figure 1 、 Figure 2 and Figure 3 According to the battery pack 100 of the embodiment of the present invention, it includes: a box body 10, a battery cell and a voltage stabilizing component 20. The battery cell is arranged in the box body 10. Specifically, the voltage stabilizing component 20 includes: a BMS slave control 21 and a heat exchanger 22. The BMS slave control 21 is electrically connected to the battery cell. The BMS slave control 21 is configured to balance the voltage of the battery cell, that is, the BMS slave control 21 adjusts the voltage of all battery cells in the battery cell to be consistent; the heat exchanger 22 is arranged in the thickness direction of the BMS slave control 21 (such as Figure 2 On one side of the BMS slave control 21 (in the front-to-back direction), the BMS slave control 21 is fixed on the heat exchange element 22.

[0031] For example, Figure 1 、 Figure 2 and Figure 3As shown, a cavity is formed inside the box 10, the battery cell is arranged inside the box 10, the BMS slave control is the slave control unit of the battery management system, the BMS slave control 21 of the voltage stabilizing component 20 is electrically connected to the battery cell, and the heat exchanger 22 of the voltage stabilizing component 20 is arranged at the front or rear side of the BMS slave control 21 in the front-to-back direction.

[0032] When the battery cell is running, there will be a voltage difference between the voltages of each battery cell of the battery cell. In order to make the output voltage of the battery cell consistent, the balancing power device on the voltage stabilizing component 20BMS slave control 21 is operated to balance the voltage of each battery cell, thereby reducing the voltage difference of each battery cell. At the same time, when the balancing power device of the BMS slave control 21 runs for a long time, the heat exchanger 22 exchanges heat on the balancing power device, thereby ensuring that the BMS slave control 21 can operate normally.

[0033] The battery pack 100 of the present invention is provided with a heat exchanger 22 on the voltage stabilizing component 20. When the BMS slave control 21 of the voltage stabilizing component 20 adjusts the voltage of the battery cell for a long time, the heat exchanger 22 can exchange heat for the BMS slave control 21. Even if the voltage difference of the battery cell is large, the BMS slave control 21 can be guaranteed to operate normally. Compared with the solution in the prior art in which the voltage stabilizing component 20 is not provided with the heat exchanger 22, which leads to a reduced effect of the voltage stabilizing component 20, the voltage stabilizing component 20 of the present application can improve the long-term operation capability of the BMS slave control 21, thereby effectively improving the voltage stabilizing capability of the voltage stabilizing component 20 and ensuring the voltage stabilizing effect of the voltage stabilizing component 20. At the same time, the voltage stabilizing component 20 can adjust the output voltage of the battery cell of the battery cell to be consistent, thereby ensuring the stability of the battery cell voltage, and further ensuring the service life and safety performance of the battery pack 100.

[0034] In addition, the voltage stabilizing component 20 is provided with a heat exchanger 22, which can support large current balancing of the battery cells, thereby ensuring the balancing effect of large-capacity battery cells, improving the system compatibility of the energy storage system, and thus effectively improving product competitiveness.

[0035] According to the battery pack 100 of the embodiment of the present invention, a heat exchanger 22 is provided on the voltage stabilizing component 20. The heat exchanger 22 can exchange heat with the BMS slave control 21, thereby effectively improving the voltage stabilizing ability of the voltage stabilizing component 20 and ensuring the voltage stabilizing effect of the voltage stabilizing component 20. At the same time, the voltage stabilizing component 20 can adjust the output voltage of the battery cells of the battery cell to be consistent, thereby ensuring the service life and safety performance of the battery pack 100.

[0036] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The heat exchange element 22 is provided on one side of the box body 10 (eg Figure 2As shown, the heat exchange element 22 is disposed on the front side of the housing 10, and the BMS slave controller 21 is disposed between the housing 10 and the heat exchange element 22, which is connected to the housing 10. Thus, the heat exchange element 22 protects the BMS slave controller 21 between the heat exchange element 22 and the housing 10, thereby preventing damage to the BMS slave controller 21 and effectively extending its service life. Furthermore, the BMS slave controller 21 is isolated from the outside world, thereby preventing damage to the BMS slave controller 21 from contact with liquids, thereby improving the waterproofing of the battery pack 100.

[0037] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 The heat exchange member 22 is plate-shaped, and the thickness direction of the heat exchange member 22 (such as Figure 2 One side surface of the heat exchange element 22 (in the front-to-back direction) is aligned with the side surface of the housing 10, and the heat exchange element 22 is screwed to the housing 10. This provides a rational structure for the heat exchange element 22, thereby increasing its heat exchange area and ensuring effective heat exchange for the BMS slave controller 21. Furthermore, the simple screw connection ensures efficient connection between the heat exchange element 22 and the housing 10, while also ensuring strong fixing of the heat exchange element 22 to the housing 10.

[0038] For example, Figure 2 and Figure 3 As shown, the heat exchange element 22 is a rectangular plate, the rear side surface of the heat exchange element 22 is in contact with the front side surface of the box body 10 , and the periphery of the heat exchange element 22 is screwed to the box body 10 .

[0039] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The heat exchange element 22 is formed with a connecting pipe 221, which is suitable for communicating with the heat exchange channel in the box body 10. As a result, the refrigerant in the heat exchange channel of the battery cell can directly enter the heat exchange element 22, thereby ensuring the heat exchange effect of the heat exchange element 22.

[0040] For example, Figure 2 and Figure 3 As shown, a connecting pipe 221 is provided at the lower end of the heat exchange element 22, which is connected to the heat exchange channel in the box body 10. The heat exchange channel in the box body 10 is used to cool the battery cell. At the same time, the refrigerant in the heat exchange channel in the box body 10 can flow into the heat exchange element 22 through the connecting pipe 221, thereby ensuring that the heat exchange element 22 can exchange heat with the BMS slave control 21.

[0041] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the side of the box body 10 facing the voltage stabilizing component 20 (such as Figure 2The front side of the box body 10 shown in FIG. 1 is provided with an inspection port 12, which is provided along the thickness direction of the box body 10 (as shown in FIG. Figure 2 The front-to-back direction of the box body 10 shown in FIG. 1 is through the inspection port 12. Thus, there is no need to disassemble the voltage stabilizing assembly 20 for inspection and maintenance, and the voltage stabilizing assembly 20 can be inspected directly through the inspection port 12, thereby reducing inspection time and improving inspection efficiency.

[0042] According to some embodiments of the present invention, referring to Figure 4 、 Figure 5 and Figure 6 The heat exchange element 22 is provided on one side of the box body 10 (eg Figure 4 The BMS slave control 21 is provided on the side of the heat exchange member 22 facing away from the battery cell (as shown in FIG. Figure 6 The front side of the heat exchanger 22 shown in the figure), the BMS slave control 21 is connected to the box 10. As a result, it is convenient to quickly install and disassemble the voltage stabilizing assembly 20, thereby facilitating the maintenance of the voltage stabilizing assembly 20, thereby effectively improving the maintenance efficiency.

[0043] For example, Figure 4 、 Figure 5 and Figure 6 As shown, the heat exchange element 22 is arranged on the front side of the box body 10 , the BMS slave controller 21 is arranged on the front side of the heat exchange element 22 , and the BMS slave controller 21 is plug-connected to the box body 10 .

[0044] According to some optional embodiments of the present invention, referring to Figure 4 、 Figure 5 and Figure 6 The upper end of the housing 10 is formed with a downwardly recessed mounting groove 11, which extends from one end of the housing 10 to the other end in a direction perpendicular to the recessed mounting groove 11. The voltage stabilizing assembly 20 is disposed in the mounting groove 11. Thus, the mounting groove 11 can provide a mounting space for the voltage stabilizing assembly 20, thereby facilitating the arrangement of the voltage stabilizing assembly 20.

[0045] For example, Figure 4 、 Figure 5 and Figure 6 As shown, the mounting groove 11 is formed by being recessed downward from the upper end of the box body 10 . The mounting groove 11 extends from the left end of the box body 10 to the right end of the box body 10 . The voltage stabilizing assembly 20 is disposed in the mounting groove 11 .

[0046] According to some optional embodiments of the present invention, referring to Figure 4 and Figure 5 The bottom wall of the mounting groove 11 is provided with a connection port 111, and the BMS is connected to one end of the control 21 (such as Figure 4The lower end of the BMS slave controller 21 is provided with a connection portion, which passes through the connection port 111 and is connected to the BMS slave controller 21. Therefore, the connection port 111 is reasonably positioned, and the connection portion passes through the connection port 111 and is connected to the battery cell, thereby facilitating the connection between the voltage stabilizing assembly 20 and the battery cell. At the same time, the BMS slave controller 21 can be disassembled by simply separating the BMS slave controller 21 from the heat exchange element 22 and the cabinet, which greatly reduces after-sales labor costs.

[0047] For example, Figure 4 and Figure 5 As shown, a connection port 111 is provided on the bottom wall of the mounting groove 11 , and the connection port 111 passes through the bottom wall of the mounting groove 11 in the up and down directions. A connection portion is provided at the lower end of the BMS slave control 21 , and the connection portion passes through the connection port 111 and is electrically connected to the battery cell.

[0048] According to some embodiments of the present invention, referring to Figure 3 and Figure 4 , the number of BMS slave controllers 21 is multiple, that is, the number of BMS slave controllers 21 can be two, three, or four or more, and the multiple BMS slave controllers 21 are arranged at intervals on the heat exchanger 22. As a result, the multiple BMS slave controllers 21 can balance the voltages of multiple battery cells, thereby ensuring the voltage balancing capability of the voltage stabilizing component 20, and further effectively avoiding damage to the BMS slave controller 21 due to excessive power of a single BMS slave controller 21. For example, Figure 3 and Figure 4 As shown, a plurality of BMS slave controllers 21 are arranged at intervals along the left-right direction on the heat exchange element 22 .

[0049] According to the energy storage system of the second embodiment of the present invention, Figure 1 、 Figure 2 and Figure 3 , including the battery pack 100 of the first aspect of this embodiment.

[0050] According to the energy storage system of the embodiment of the present invention, by setting the battery pack 100 of the above-mentioned first embodiment, a heat exchanger 22 is set on the voltage stabilizing component 20. The heat exchanger 22 can exchange heat with the BMS slave control 21, thereby effectively improving the voltage stabilizing ability of the voltage stabilizing component 20 and ensuring the voltage stabilizing effect of the voltage stabilizing component 20. At the same time, the voltage stabilizing component 20 can adjust the output voltage of the battery cells of the battery cell to be consistent, thereby ensuring the service life and safety performance of the battery pack 100.

[0051] In the description of the present invention, 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 to 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 invention 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 to the present invention.

[0052] 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 specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0053] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0054] 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 invention. 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.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: Box; A battery cell, wherein the battery cell is arranged in the box; A voltage stabilizing component, comprising: a BMS slave control, the BMS slave control being electrically connected to the battery cell, and the BMS slave control being configured to balance the voltage of the battery cell; A heat exchange component is provided on one side of the BMS slave control in a thickness direction, and the BMS slave control is fixed on the heat exchange component.

2. The battery pack according to claim 1, wherein: The heat exchange element is arranged on one side of the box body, the BMS slave controller is arranged between the box body and the heat exchange element, and the heat exchange element is connected to the box body.

3. The battery pack according to claim 2, wherein: The heat exchange element is in a plate shape, one side surface of the heat exchange element in the thickness direction is in contact with the side surface of the box body, and the heat exchange element is screwed to the box body.

4. The battery pack according to claim 2, wherein: A connecting pipe is formed on the heat exchange component, and the connecting pipe is suitable for communicating with the heat exchange flow channel in the box body.

5. The battery pack according to claim 2, wherein: An inspection port is provided on a side of the box body facing the voltage stabilizing assembly, and the inspection port penetrates the box body along a thickness direction.

6. The battery pack according to claim 1, wherein: The heat exchange component is arranged on one side of the box body, the BMS slave controller is arranged on a side of the heat exchange component away from the battery core, and the BMS slave controller is connected to the box body.

7. The battery pack according to claim 6, characterized in that: A downwardly recessed mounting groove is formed along the upper end of the box body, and extends from one end to the other end of the box body along a recessed direction perpendicular to the mounting groove. The voltage stabilizing component is arranged in the mounting groove.

8. The battery pack according to claim 7, characterized in that: A connecting port is provided on the bottom wall of the mounting groove, and a connecting portion is provided at one end of the BMS slave controller. The connecting portion passes through the connecting port and is connected to the BMS slave controller.

9. The battery pack according to claim 1, wherein: There are multiple BMS slave controls, and the multiple BMS slave controls are arranged at intervals on the heat exchange element.

10. An energy storage system, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 9.

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