Battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and particularly provides a battery pack and an electric device. The battery pack comprises a box body, a first battery management device and a heat conducting plate, the box body comprises a frame and a heat exchange plate, a battery bin is defined by the frame, the heat exchange plate is arranged at the bottom of the battery bin, the frame comprises a first frame, and the first frame is in contact with the heat exchange plate; the first battery management device is arranged outside the battery compartment and is connected with the first frame; the heat-conducting plate is arranged on one surface, back to the first frame, of the first battery management device and is in contact with the heat exchange plate. According to the battery pack, the first frame and the heat conducting plate are arranged on the two sides of the first battery management device correspondingly, and both the first frame and the heat conducting plate make contact with the heat exchange plate, so that a heat conducting path is formed, heat dissipation of the first battery management device is enhanced, and the situation that the temperature of the first battery management device is too high, and the performance of the battery pack is affected is avoided.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and specifically proposes a battery pack and an electrical device. Background Technology

[0002] A Battery Management System (BMS) is the core control unit in battery applications, often referred to as the battery's "nanny" or "housekeeper." It intelligently manages the battery's charging and discharging process, monitors its status in real time, balances energy distribution, and ensures safe operation. It is widely used in electric vehicles, energy storage systems, and industrial equipment.

[0003] Currently, battery packs typically consist of a battery compartment and an electrical compartment. The battery compartment houses the batteries, while the electrical compartment contains a battery management system (BMS). The BMS uses a data acquisition harness to collect temperature and pressure signals from the batteries. To save space, some battery packs use a vertically oriented BMS, with its larger surface facing the batteries. This can lead to poor heat dissipation from the BMS, affecting its performance. Utility Model Content

[0004] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:

[0005] This application discloses a battery pack including a housing, a first battery management device, and a heat-conducting plate. The housing includes a frame and a heat exchange plate. The frame surrounds a battery compartment, and the heat exchange plate is located at the bottom of the battery compartment. The frame includes a first frame that contacts the heat exchange plate. The first battery management device is located outside the battery compartment and connected to the first frame. The heat-conducting plate is located on the side of the first battery management device facing away from the first frame and contacts the heat exchange plate.

[0006] The technical solution proposed in this application has at least the following technical effects:

[0007] In this application, a first frame and a heat-conducting plate are respectively provided on both sides of the first battery management device. Both the first frame and the heat-conducting plate are in contact with the heat exchange plate, thereby forming a heat conduction path, enhancing the heat dissipation of the first battery management device, and preventing the temperature of the first battery management device from being too high, which would affect the performance of the battery pack. Attached Figure Description

[0008] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.

[0009] Specifically, the annotations for the accompanying drawings are as follows:

[0010] Figure 1 This is a partial structural schematic diagram of the battery pack described in some embodiments of this application;

[0011] Figure 2 This is a partial side cross-sectional view of the battery pack described in some embodiments of this application;

[0012] Figure 3 This is a schematic diagram of the overall structure of the battery pack described in some embodiments of this application.

[0013] Specifically, the annotations for the figure marks in the instruction manual are as follows:

[0014] 1. Housing; 10. First frame; 20. Heat exchange plate; 201. Protrusion; 30. First battery management device; 40. Heat-conducting plate; 401. Heat-conducting plate body; 402. Bending part; 50. Second battery management device; 60. Battery pack; 70. Conductive busbar; 80. Bracket; 90. Data acquisition harness; 100. First fixing component; 110. Communication line; 120. Second fixing component. Detailed Implementation

[0015] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It should be understood that the content mentioned below represents only some embodiments of this application, and not all embodiments are listed exhaustively. Therefore, other embodiments that can be obtained based on the following embodiments without any inventive effort fall within the protection scope of this application.

[0016] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0017] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0018] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0019] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0020] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0021] Firstly, referring to Figures 1 to 3 This application provides an embodiment of a battery pack, which includes a housing 1, a first battery management device 30, and a heat-conducting plate 40. The housing 1 includes a frame and a heat exchange plate 20. The frame surrounds a battery compartment, and the heat exchange plate 20 is disposed at the bottom of the battery compartment. The frame includes a first frame 10, which is in contact with the heat exchange plate 20. The first battery management device 30 is disposed outside the battery compartment and connected to the first frame 10. The heat-conducting plate 40 is disposed on the side of the first battery management device 30 facing away from the first frame 10, and the heat-conducting plate 40 is in contact with the heat exchange plate 20.

[0022] In this embodiment, a first frame 10 and a heat-conducting plate 40 are respectively provided on both sides of the first battery management device 30. The first frame 10 and the heat-conducting plate 40 are in contact with the heat exchange plate 20, thereby forming a heat conduction path, enhancing the heat dissipation of the first battery management device 30, and preventing the temperature of the first battery management device 30 from being too high, which would affect the performance of the battery pack.

[0023] Optionally, the heat exchange plate 20 is a liquid-cooled plate.

[0024] In some embodiments, refer to Figure 1 and Figure 2 The battery pack also includes a second battery management device 50, which is located on the side of the heat-conducting plate 40 facing away from the first battery management device 30.

[0025] In this embodiment, the first battery management device 30 and the second battery management device 50 are both arranged vertically to make reasonable use of the space inside the battery pack. They are respectively located on both sides of the heat-conducting plate 40, and the heat-conducting plate 40 is in contact with the heat exchange plate 20, thereby enhancing the heat dissipation effect on the first battery management device 30 and the second battery management device 50 and ensuring the stability of battery performance.

[0026] It should be noted that the first battery management device 30 can be a slave-controlled BMS, and the second battery management device 50 can be a master-controlled BMS. In a battery management system (BMS), the master and slave are two core components that work together to achieve efficient, safe, and intelligent management of the battery pack 60. Specifically, the master is the "brain" of the entire BMS system, responsible for overall management and decision-making, while the slave is the "hands and feet," responsible for real-time monitoring and control of specific battery modules or cells.

[0027] In some embodiments, refer to Figure 1 and Figure 2 The battery pack also includes a battery pack 60 and a conductive busbar 70. The battery pack 60 is located inside the battery compartment, and the conductive busbar 70 is electrically connected to the battery pack 60. The conductive busbar 70 is in contact with the heat-conducting plate 40.

[0028] In this embodiment, the conductive bus 70 is used to transmit the current of the battery pack 60, which generates a lot of heat. The conductive bus 70 is in contact with the heat-conducting plate 40, so that the heat-conducting plate 40 can also dissipate heat from the conductive bus 70. The design is reasonable.

[0029] Optionally, the busbar 70 is a copper busbar and can transmit high-power current.

[0030] In some embodiments, refer to Figure 1 and Figure 2 The battery pack also includes a bracket 80, which is supported between the second battery management device 50 and the heat-conducting plate 40. The bracket 80 forms a clearance space between the second battery management device 50 and the heat-conducting plate 40, and the conductive busbar 70 passes through the clearance space.

[0031] In this embodiment, the second battery management device 50 is mounted on the heat-conducting plate 40 via a bracket 80, and the conductive busbar 70 passes between the second battery management device 50 and the heat-conducting plate 40. The arrangement is reasonable, the space utilization is high, and it can achieve a good heat dissipation effect.

[0032] In addition, the bracket 80 is a heat-conducting component, which can transfer the heat of the second battery management device 50 to the heat-conducting plate 40, and then to the heat exchange plate 20.

[0033] In some embodiments, refer to Figure 1 The battery pack also includes a data acquisition harness 90, which is electrically connected between the battery pack 60 and the first battery management device 30; the heat-conducting plate 40 is a metal part and electromagnetically isolates the data acquisition harness 90 from the conductive busbar 70.

[0034] In this embodiment, the acquisition harness 90 is used to acquire the temperature and voltage of the battery pack 60 and transmits a low-power current, while the conductive busbar 70 transmits a high-power current. The heat-conducting plate 40 is a metal part and separates the acquisition harness 90 and the conductive busbar 70 to avoid electromagnetic interference between them.

[0035] In some embodiments, refer to Figure 1 The heat-conducting plate 40 is provided with a first fixing member 100, and the conductive busbar 70 is fixed to the heat-conducting plate 40 through the first fixing member 100.

[0036] In this embodiment, the first fixing member 100 fixes the conductive busbar 70 to the heat-conducting plate 40, making the position of the conductive busbar 70 more stable and less prone to shaking, and ensuring that the conductive busbar 70 and the heat-conducting plate 40 are always in contact, thereby enhancing the heat dissipation effect.

[0037] Optionally, the first fastener 100 consists of multiple annular fasteners spaced apart. After the conductive busbar 70 passes through the multiple annular fasteners in sequence, the annular fasteners are tightened to achieve a fixing effect.

[0038] In some embodiments, refer to Figure 1 The battery pack also includes a communication line 110, which is electrically connected to the first battery management device 30 and the second battery management device 50; a second fixing member 120 is provided on the heat-conducting plate 40, and the communication line 110 is fixed to the heat-conducting plate 40 through the second fixing member 120.

[0039] In this embodiment, the first battery management device 30 and the second battery management device 50 are connected through a communication line 110, and the communication line 110 is fixed to the heat-conducting plate 40 by the second fastener 120 to prevent the communication line 110 from shaking.

[0040] Optionally, the second fastener 120 can also be multiple ring fasteners. After the communication line 110 passes through multiple ring fasteners, tightening the ring fasteners achieves the fixing effect.

[0041] In some embodiments, refer to Figure 2 The distance between the first battery management device 30 and the second battery management device 50 is d, and satisfies 1.5mm≤d≤20mm.

[0042] In this embodiment, both the first battery management device 30 and the second battery management device 50 generate heat during operation. The distance d between them should be moderate, avoiding both excessively small d, which would affect the heat dissipation effect of each other, and excessively large d, which would reduce space utilization. Therefore, d can be any one of 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, and 20mm, or a range between any two of these values.

[0043] Understandably, the distance d between the first battery management device 30 and the second battery management device 50 is related to the thickness of the heat-conducting plate 40 and the size of the bracket 80.

[0044] In some embodiments, refer to Figure 1 and Figure 2 The heat exchange plate 20 extends beyond the first frame 10 and forms a protrusion 201, which supports the first battery management device 30; and / or, the heat conduction plate 40 includes a heat conduction plate body 401 and a bent portion 402, which is connected to the corner of the heat conduction plate body 401 and contacts the side of the heat exchange plate 20 facing away from the battery compartment.

[0045] In this embodiment, the heat exchange plate 20 extends beyond the first frame 10 to form a protrusion 201. The protrusion 201 supports the first battery management device 30, improving structural stability and increasing the contact area between the heat exchange plate 20 and the first battery management device 30, thus enhancing heat dissipation. Understandably, in some embodiments, the protrusion 201 can also support the second battery management device 50 and the heat-conducting plate 40; that is, the protrusion size of the protrusion 201 is large enough to support the heat-conducting plate 40 and allow the second battery management device 50 to have a direct contact portion with the heat exchange plate 20. These are also preferred implementation methods.

[0046] Furthermore, in some embodiments, the heat-conducting plate 40 includes a heat-conducting plate body 401 and a bent portion 402. The bent portion 402 is connected to the corner of the heat-conducting plate body 401, and the bent portion 402 contacts the side of the heat exchange plate 20 facing away from the battery compartment, thereby increasing the contact area between the heat-conducting plate 40 and the heat exchange plate 20 and improving the heat exchange efficiency. Specifically, refer to... Figure 2 Both the first battery management device 30 and the second battery management device 50 are connected to the heat-conducting plate body 401. The heat-conducting plate body 401 can also contact the end face of the heat exchange plate 20, thereby further increasing the contact area between the heat-conducting plate 40 and the heat exchange plate 20.

[0047] Optionally, both the heat-conducting plate body 401 and the bending part 402 are made of metal materials, and the two can be integrally formed or welded together, with good thermal conductivity.

[0048] Secondly, embodiments of this application propose an electrical device that includes the battery pack of the first aspect. Therefore, the electrical device of the second aspect possesses all the technical effects of the battery pack of the first aspect, the technical effects of which will not be elaborated further.

[0049] It should be noted that the battery pack in this embodiment only presents the structure related to the improvement points. Of course, it may also include other components. For example, the battery pack also includes adhesive strips connecting the battery pack 60 and the housing 1, insulating pads that isolate the battery pack 60, etc. Other components will not be described here.

[0050] Alternatively, the electrical device may be an electric vehicle, an energy storage system, or industrial equipment.

[0051] In particular, the term "and / or" in this application should be understood as follows:

[0052] In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0053] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject;

[0054] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0055] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.

Claims

1. A battery pack, characterized in that, include: The housing (1) includes a frame and a heat exchange plate (20). The frame surrounds the battery compartment, and the heat exchange plate (20) is located at the bottom of the battery compartment. The frame includes a first frame (10), which is in contact with the heat exchange plate (20). A first battery management device (30) is disposed outside the battery compartment and connected to the first frame (10); A heat-conducting plate (40) is disposed on the side of the first battery management device (30) facing away from the first frame (10), and the heat-conducting plate (40) is in contact with the heat exchange plate (20).

2. The battery pack according to claim 1, characterized in that, The battery pack also includes a second battery management device (50), which is disposed on the side of the heat-conducting plate (40) facing away from the first battery management device (30).

3. The battery pack according to claim 2, characterized in that, The battery pack also includes a battery pack (60) and a conductive busbar (70). The battery pack (60) is located in the battery compartment. The conductive busbar (70) is electrically connected to the battery pack (60) and is in contact with the heat-conducting plate (40).

4. The battery pack according to claim 3, characterized in that, The battery pack also includes a bracket (80), which is supported between the second battery management device (50) and the heat-conducting plate (40). A clearance space is formed between the second battery management device (50) and the heat-conducting plate (40) through the bracket (80), and the conductive busbar (70) passes through the clearance space.

5. The battery pack according to claim 4, characterized in that, The battery pack also includes a data acquisition harness (90), which is electrically connected between the battery pack (60) and the first battery management device (30). The heat-conducting plate (40) is a metal part and electromagnetically isolates the acquisition harness (90) from the conductive busbar (70).

6. The battery pack according to claim 4, characterized in that, The heat-conducting plate (40) is provided with a first fixing member (100), and the conductive bus (70) is fixed to the heat-conducting plate (40) by the first fixing member (100).

7. The battery pack according to claim 2, characterized in that, The battery pack also includes a communication line (110) electrically connected to the first battery management device (30) and the second battery management device (50); The heat-conducting plate (40) is provided with a second fixing member (120), and the communication line (110) is fixed to the heat-conducting plate (40) through the second fixing member (120).

8. The battery pack according to any one of claims 2 to 7, characterized in that, The distance between the first battery management device (30) and the second battery management device (50) is d, and satisfies 1.5mm≤d≤20mm.

9. The battery pack according to any one of claims 1 to 7, characterized in that, The heat exchange plate (20) extends beyond the first frame (10) and forms a protrusion (201), which supports the first battery management device (30); And / or, the heat-conducting plate (40) includes a heat-conducting plate body (401) and a bent portion (402), the bent portion (402) being connected to the corner of the heat-conducting plate body (401), and the bent portion (402) being in contact with the side of the heat exchange plate (20) facing away from the battery compartment.

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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