BMS heat dissipation structure, BMS mounting bracket and battery

Abstract

The utility model relates to the technical field of battery heat dissipation, and discloses a BMS (Battery Management System) heat dissipation structure, a BMS mounting bracket and a battery. The BMS heat dissipation structure comprises a support internally provided with a BMS installation cavity, a silicon film is attached to the surface of a preset heat source device on the BMS, and a cooling fin is attached to the side, away from the BMS, of the silicon film; and one end of the radiating fin is in close contact with an elastic heat conductor filled in a shell gap between the shell of the battery and the bracket. According to the utility model, the insulating silica gel sheet is arranged at the power module device in the high-heat area to insulate and isolate the radiating fin and the BMS, and the silica gel is an effective heat conduction material, so that the heat of the power module device can be transferred to the radiating fin through the silica gel, and then the heat is guided out to the shell of the battery through the radiating fin and the heat conductor; therefore, the heat cannot be gathered in the inner cavity of the battery, and the performance and the safety of the battery are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery heat dissipation technology, and in particular to a BMS heat dissipation structure, a BMS mounting bracket and a battery. Background Technology

[0002] With the continuous development of technology and the increasing emphasis on environmental protection and sustainable energy development, lithium batteries have become a key research focus. Due to their high energy density and long lifespan, lithium batteries are widely used in the electric vehicle industry. The BMS (Battery Management System) is the "heart" of the lithium battery. If the heat generated during operation is not effectively dissipated, the battery's performance and lifespan will be affected. Therefore, how to effectively dissipate heat without compromising performance has become a key issue requiring careful management.

[0003] In existing technologies, BMS heat dissipation structures typically use heat dissipation materials (metal sheets, such as copper or aluminum sheets) to cover a large area of ​​the BMS, dissipating the heat generated during BMS operation. However, since the heat mainly originates from power module devices, and the safe operating temperatures of various devices within the BMS differ significantly, existing BMS heat dissipation structures do not consider these factors. Consequently, when a BMS using such a heat dissipation structure operates, the heat sources of some high-power devices cannot dissipate heat in a timely manner. Furthermore, if the heat dissipation material experiences heat overload, the BMS devices will be subjected to varying degrees of baking, thus affecting battery performance.

[0004] Therefore, how to design a BMS heat dissipation structure that can effectively and promptly dissipate heat from local heat sources to the outside, preventing heat from accumulating inside the battery cavity, has become a technical problem that urgently needs to be solved in this field.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] The purpose of this utility model is to provide a BMS heat dissipation structure, a BMS mounting bracket, and a battery to solve or at least partially solve the technical problems existing in the prior art.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, this utility model provides a BMS heat dissipation structure, including a bracket with a BMS mounting cavity inside, wherein the BMS is installed in the BMS mounting cavity;

[0009] A silicone sheet is attached to the surface of the predetermined heat source device on the BMS, and a heat sink is attached to the side of the silicone sheet away from the BMS.

[0010] One end of the heat sink is in close contact with an elastic heat conductor that fills the gap between the battery casing and the bracket.

[0011] Optionally, the bracket includes an upper bracket and a lower bracket that are fixedly connected as one unit, and the upper bracket and the lower bracket form the BMS mounting cavity.

[0012] The upper bracket has a heat dissipation channel on the side near the heat source device for the heat sink to pass through. One end of the heat dissipation channel is set to face the heat conductor, and the other end of the heat dissipation channel is connected to the BMS mounting cavity.

[0013] Optionally, the upper support is provided with a plurality of stepped grooves, and a fixing member is provided in the stepped groove; the lower support is provided with fixing holes corresponding to the positions of the fixing members.

[0014] The fastener penetrates the bottom of the stepped groove and is fixedly connected to the fixing hole.

[0015] Optionally, the fastener is a bolt or screw, and the fastener is threadedly connected to the fixing hole.

[0016] Optionally, the heat sink is a metal heat sink.

[0017] Optionally, the heat conductor is thermally conductive silicone; the heat conductor blocks one end opening of the heat dissipation channel.

[0018] Secondly, this utility model provides a BMS mounting bracket, which has a BMS mounting cavity for mounting a BMS, including a BMS heat dissipation structure as described above.

[0019] Thirdly, this utility model also provides a battery, including a housing with an opening at the top, and a bracket is fixedly provided at the opening of the housing. The bracket adopts a BMS mounting bracket as described above.

[0020] Optionally, the outer casing is an aluminum casing.

[0021] Optionally, the battery is a lithium-ion battery.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This utility model provides a BMS heat dissipation structure that uses insulating silicone sheets to insulate the heat sink and BMS at the power module devices in high-heat areas. Silicone is an effective thermal conductive material, allowing heat from the power module devices to be transferred to the heat sink, and then conducted to the battery casing through the heat sink and thermal conductors, where it dissipates. This heat dissipation structure, designed for localized devices, effectively removes heat from localized high-heat areas in a timely manner, preventing heat accumulation inside the battery cavity and ensuring battery performance and safety.

[0024] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional structural diagram of a battery provided in an embodiment of this utility model.

[0027] Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle.

[0028] Figure 3 yes Figure 1 Enlarged structural diagram at point B in the middle.

[0029] In the diagram: 10, outer casing; 20, heat conductor; 30, heat sink; 40, BMS; 50, silicone sheet; 60, bracket; 61, upper bracket; 62, lower bracket; 63, fastener. Detailed Implementation

[0030] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0031] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0032] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0033] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0034] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0035] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0036] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0037] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0039] Example 1:

[0040] Please see Figures 1-3 , Figure 1 This is a cross-sectional structural diagram of a battery provided in an embodiment of the present invention. Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle. Figure 3 yes Figure 1 Enlarged structural diagram at point B in the middle.

[0041] Please combine Figure 1 and Figure 3 This embodiment provides a BMS heat dissipation structure, including a silicone sheet 50 attached to the surface of a predetermined heat source device on the BMS40; for ease of understanding, in this embodiment, the predetermined heat source device is set to a heat source device with a large heat generation or a low safe temperature.

[0042] Furthermore, a heat sink 30 is attached to the side of the silicone sheet 50 away from the BMS40;

[0043] like Figure 2 As shown, one end of the heat sink 30 is in close contact with the elastic heat conductor 20 that fills the gap between the battery casing 10 and the bracket 60.

[0044] It is understandable that heat sink 30 is generally a metal heat sink, such as copper or aluminum, which has electrical conductivity. Therefore, it cannot directly contact the power module device to avoid faults such as leakage or short circuit. However, the heat dissipation structure provided in this embodiment uses an insulating silicone sheet 50 at the power module device in the high-heat area to insulate the heat sink 30 and BMS40. Since silicone is a highly efficient thermal conductive material, the silicone sheet 50 can transfer the heat from the power module device to the heat sink in a timely manner. Then, the heat is conducted to the battery casing through the heat sink 30 and the heat conductor 20 and dissipated through the casing. This heat dissipation structure for local devices can effectively dissipate the heat from the local high-heat area to the outside of the battery in a timely manner, so that heat does not accumulate in the battery cavity, thus ensuring the performance and safety of the battery.

[0045] Furthermore, such as Figure 3 As shown, the bracket 60 includes an upper bracket 61 and a lower bracket 62 that are fixedly connected as one unit, and a BMS mounting cavity is formed between the upper bracket 61 and the lower bracket 62.

[0046] For example Figure 2 As shown, the upper bracket 61 has a heat dissipation channel for the heat sink 30 to pass through it on the side near the heat source device. One end of the heat dissipation channel is set directly opposite the heat conductor 20, and the other end of the heat dissipation channel is connected to the BMS mounting cavity.

[0047] Specifically, the heat conductor 20 is made of thermally conductive silicone; the heat conductor 20 seals one end of the heat dissipation channel opening, preventing external moisture or dust from entering the BMS mounting cavity through the heat dissipation channel.

[0048] It is understood that the battery casing 10 is generally made of metal, such as steel or aluminum. In this embodiment, the battery casing 10 is made of aluminum because aluminum is a very efficient heat dissipation material. Therefore, the heat transferred to the aluminum casing through the heat conductor 20 can be quickly dissipated to the outside of the battery by the aluminum casing.

[0049] Furthermore, such as Figure 2 As shown, the upper bracket 61 has several stepped grooves 611, and a fixing member 63 is provided in the stepped groove 611; the lower bracket 62 has fixing holes 621 at the positions corresponding to the fixing members 63.

[0050] The fastener 63 penetrates the bottom of the stepped groove 611 and is fixedly connected to the fixing hole 621.

[0051] Specifically, in this embodiment, the fixing member 63 is a bolt or screw, and the fixing member 63 is threadedly connected to the fixing hole 621.

[0052] It should be noted that conventional heat dissipation components can also be installed in the BMS mounting cavity of the bracket 60. That is, the implementation of this embodiment is based on the prior art and enhances the heat dissipation of local devices. Therefore, the technical implementation of this embodiment does not require the separate design of an additional BMS mounting bracket or the stripping of the heat sink of the existing BMS mounting bracket, and will not increase the additional design cost. Since the bracket 60 is a detachable mounting structure, when in use, it is only necessary to set the BMS heat dissipation structure designed in this embodiment at the predetermined heat source device, and will not increase the additional heat dissipation structure disassembly and assembly cost.

[0053] Furthermore, the BMS heat dissipation structure in this embodiment is simple and reliable, makes full use of the properties of various materials, and is inexpensive.

[0054] In summary, the BMS heat dissipation structure provided in this embodiment can effectively and promptly dissipate heat from local heat sources to the outside, preventing heat from accumulating inside the battery cavity. This solves a technical problem that urgently needs to be addressed in the field, and is also low in cost, making it widely applicable to heat dissipation structures for various types of batteries.

[0055] Example 2:

[0056] like Figure 1 As shown, the battery provided in this embodiment includes a housing 10 with a top opening, and a BMS mounting bracket is fixedly provided at the opening of the housing 10.

[0057] The BMS mounting bracket includes a bracket 60 with a BMS mounting cavity inside; the BMS 40 is installed in the BMS mounting cavity; the BMS mounting cavity is provided with a BMS heat dissipation structure as described in Embodiment 1;

[0058] Since the BMS heat dissipation structure has been described in detail in Embodiment 1, it will not be repeated in this embodiment.

[0059] Specifically, in this embodiment, the battery is a lithium-ion battery, and the battery casing 10 is an aluminum casing.

[0060] The battery provided in this embodiment has a high-efficiency heat dissipation structure specifically designed for the high-heat area within the BMS mounting bracket. Heat is dissipated to the outside of the battery through the silicone sheet 50, heat sink 30, heat conductor 20, and outer casing 10 in sequence, preventing heat from accumulating inside the battery cavity and ensuring the battery's performance and safety.

[0061] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A BMS heat dissipation structure, characterized in that, Includes a bracket (60) with a BMS mounting cavity inside, and the BMS (40) is installed in the BMS mounting cavity; A silicone sheet (50) is attached to the surface of the predetermined heat source device on the BMS (40), and a heat sink (30) is attached to the side of the silicone sheet (50) away from the BMS (40); One end of the heat sink (30) is in close contact with an elastic heat conductor (20) that fills the gap between the battery casing (10) and the bracket (60).

2. The BMS heat dissipation structure according to claim 1, characterized in that, The bracket (60) includes an upper bracket (61) and a lower bracket (62) fixedly connected as one unit, and the upper bracket (61) and the lower bracket (62) form the BMS mounting cavity. The upper bracket (61) is located on the side near the heat source device and has a heat dissipation channel for passing through the heat sink (30). One end of the heat dissipation channel is set opposite to the heat conductor (20), and the other end of the heat dissipation channel is connected to the BMS mounting cavity.

3. The BMS heat dissipation structure according to claim 2, characterized in that, The upper support (61) is provided with a plurality of stepped grooves (611), and a fixing member (63) is provided in the stepped grooves (611); the lower support (62) is provided with fixing holes (621) corresponding to the fixing members (63); The fastener (63) penetrates the bottom of the stepped groove (611) and is fixedly connected to the fixing hole (621).

4. The BMS heat dissipation structure according to claim 3, characterized in that, The fastener (63) is a bolt or screw, and the fastener (63) is threadedly connected to the fixing hole (621).

5. A BMS heat dissipation structure according to claim 1, characterized in that, The heat sink (30) is a metal heat sink.

6. A BMS heat dissipation structure according to claim 2, characterized in that, The heat conductor (20) is thermally conductive silicone; the heat conductor (20) seals one end opening of the heat dissipation channel.

7. A BMS mounting bracket, wherein a BMS mounting cavity for mounting a BMS (40) is provided therein, characterized in that, Includes a BMS heat dissipation structure as described in any one of claims 1-6.

8. A battery comprising a casing (10) with a top opening, wherein a bracket (60) is fixedly disposed at the opening of the casing (10), characterized in that, The bracket (60) is a BMS mounting bracket as described in claim 7.

9. A battery according to claim 8, characterized in that, The outer shell (10) is an aluminum shell.

10. A battery according to claim 8, characterized in that, The battery is a lithium-ion battery.

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