Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, the battery pack comprises a battery power distribution device, the battery power distribution device comprises: a housing having an accommodating cavity; the component module is arranged in the accommodating cavity; and the heat-conducting glue layer is at least partially arranged in the accommodating cavity, the component module is at least partially immersed in the heat-conducting glue layer, and the heat-conducting glue layer is provided with a heat exchange runner. The heat dissipation effect of the component module is improved, and the use safety of the battery pack is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and electrical equipment. Background Art

[0002] At present, a battery pack needs to be equipped with a battery disconnect unit (BDU) to realize power distribution, power on / off control, etc. The power distribution unit generally includes components such as relays, fuses, current sensors, etc.

[0003] During the use of the battery pack, components will inevitably generate heat. Currently, natural cooling alone is inefficient. When components work for a long time and maintain a high temperature, it not only affects the service life of the components, but also poses certain safety hazards. Utility Model Content

[0004] Purpose of the utility model: The embodiment of the present application provides a battery pack to solve the above-mentioned technical problems; another purpose of the present application is to provide an electrical device using the above-mentioned battery pack.

[0005] Technical solution: A battery pack according to an embodiment of the present application includes a battery power distribution device, wherein the battery power distribution device includes:

[0006] A housing having a receiving cavity;

[0007] A component module, wherein the component module is arranged in the accommodating cavity;

[0008] A heat-conducting adhesive layer is at least partially disposed in the accommodating cavity, and the component module is at least partially immersed in the heat-conducting adhesive layer, and the heat-conducting adhesive layer is provided with a heat exchange flow channel.

[0009] In some embodiments, the component module includes a plurality of components and a conductive member electrically connecting the plurality of components;

[0010] The thermal conductive adhesive layer is partially filled between the components and the conductive member.

[0011] In some embodiments, the thermally conductive adhesive layer is partially filled on a side of the conductive member facing away from the component;

[0012] The heat exchange flow channels are provided in plurality, and at least some of the heat exchange flow channels are provided on a side of the conductive member away from the component;

[0013] And / or, at least part of the heat exchange channel is arranged between the conductive part and the component.

[0014] In some embodiments, a plurality of heat exchange channels are provided, and the plurality of heat exchange channels are arranged at intervals on the peripheral side of the component module.

[0015] In some embodiments, the thermally conductive adhesive layer is provided with a liquid inlet and a liquid outlet respectively connected to the heat exchange flow channel, and the liquid inlet and the liquid outlet are arranged on opposite sides of the thermally conductive adhesive layer.

[0016] In some embodiments, the shell further has an opening communicating with the accommodating cavity, the component module disposed in the accommodating cavity is immersed in the thermal conductive adhesive layer, and the thermal conductive adhesive layer seals the opening.

[0017] In some embodiments, the thermally conductive adhesive layer includes a main body portion filled in the accommodating cavity and a protruding portion protruding from the opening, and the liquid inlet and the liquid outlet are provided on the protruding portion.

[0018] In some embodiments, the minimum distance between the component and the conductive member is c, satisfying 2mm≤c≤3mm.

[0019] In some embodiments, the thermally conductive adhesive layer is made of thermally conductive silicone material, the thermal conductivity of the thermally conductive adhesive layer is a, the thermal conductivity of air is b, and a≥10b is satisfied.

[0020] Correspondingly, an electrical device described in an embodiment of the present application includes the above-mentioned battery pack.

[0021] Beneficial effects: A battery pack according to an embodiment of the present application includes a battery distribution device, and the battery distribution device includes a shell, a component module and a thermally conductive adhesive layer. The shell has a accommodating cavity, the component module is arranged in the accommodating cavity, the thermally conductive adhesive layer is arranged in the accommodating cavity, the component module is at least partially immersed in the thermally conductive adhesive layer, and the thermally conductive adhesive layer is provided with a heat exchange flow channel. By directly contacting the component module with the thermally conductive adhesive layer, the heat dissipation effect of the component module is improved compared to the natural cooling of the component. At the same time, a heat exchange flow channel is provided in the thermally conductive adhesive layer. On the one hand, the heat dissipation area of ​​the thermally conductive adhesive layer is increased, and on the other hand, a heat exchange fluid can be introduced into the heat exchange flow channel, thereby further improving the heat dissipation effect of the thermally conductive adhesive layer and the component module through the heat exchange fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a battery power distribution device according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the exploded structure of the battery power distribution device according to an embodiment of the present application;

[0025] Figure 3 is a schematic structural diagram of one end of a heat exchange flow channel in an embodiment of the present application;

[0026] Figure 4 yes Figure 3 Sectional view along line AA;

[0027] Figure 5 yes Figure 3 Sectional view along line BB;

[0028] Figure numerals: 1, shell; 10, accommodating cavity; 11, opening; 2, component module; 20, component; 21, conductive part; 3, thermal conductive adhesive layer; 30, heat exchange flow channel; 31, liquid inlet; 32, liquid outlet; 33, main body; 34, protrusion; 35, through-opening. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0031] The applicant noted that the battery distribution unit (BDU) in the battery pack is a core component of the battery control system and has a high-voltage power distribution function. The battery distribution unit plays a vital role in the safety of the battery pack.

[0032] Usually, the components in the distribution device are generally connected by wiring harnesses, and some circuits with larger currents are connected by copper busbars and other methods. During operation, especially under high-power charging and discharging conditions, the components of the distribution device will inevitably continue to generate heat. In battery packs that require a high level of sealing and waterproofing, heat can only be dissipated by natural cooling. However, the heat dissipation efficiency of natural cooling is relatively limited. After working for a long time, the temperature of the distribution device will be too high, which will not only affect the service life of the components in the distribution device, but also affect the safety of the battery pack, posing a great safety hazard.

[0033] In view of this, combined with Figures 1 to 5 , an embodiment of the present application provides a battery pack, aiming to overcome at least one of the above-mentioned technical problems.

[0034] Reference Figure 1 and Figure 2 A battery pack includes a battery distribution device. It can be understood that the battery distribution device is used to be installed in a box of the battery pack (not shown in the figure) to facilitate electrical connection of the batteries in the battery pack, thereby realizing a high-voltage power distribution function.

[0035] The battery power distribution device includes a housing 1, a component module 2 and a thermal conductive adhesive layer 3. The housing 1 has a housing cavity 10, the component module 2 is arranged in the housing cavity 10, and the thermal conductive adhesive layer 3 is at least partially arranged in the housing cavity 10, the component module 2 is at least partially immersed in the thermal conductive adhesive layer 3, and the thermal conductive adhesive layer 3 is provided with a heat exchange flow channel 30.

[0036] It can be understood that, by directly contacting the component module 2 with the thermal conductive adhesive layer 3, the heat dissipation effect of the component module 2 is improved compared with the natural cooling of the component module 2. On this basis, a heat exchange channel 30 is provided in the thermal conductive adhesive layer 3, which, on the one hand, increases the heat dissipation area of ​​the thermal conductive adhesive layer 3, and on the other hand, by passing a heat exchange fluid into the heat exchange channel 30, the heat of the thermal conductive adhesive layer 3 is taken away by the heat exchange fluid, thereby further improving the heat dissipation effect of the thermal conductive adhesive layer 3 and the component module 2, which is conducive to keeping the component module 2 at a better working temperature, improving the protection of the component module 2 and the safety of the battery pack.

[0037] In addition, it is understandable that when the ambient temperature of the battery pack is low, the component module 2 can also be kept at an optimal operating temperature by passing a heat exchange fluid into the heat exchange channel 30 to increase the temperature of the thermal conductive adhesive layer 3, which will not be repeated here.

[0038] Specifically, in some embodiments, referring to Figures 2 to 5 The component module 2 includes a plurality of components 20 and a conductive member 21 electrically connecting the plurality of components 20 , and the thermal conductive adhesive layer 3 is partially filled between the components 20 and the conductive member 21 .

[0039] The components 20 may include relays, fuses, current sensors, pre-charge resistors, etc. In addition, it should be noted that in this embodiment, Figure 2 As shown, the conductive members 21 are exemplarily copper bars, and in other embodiments, conductive members 21 such as wires may also be partially used.

[0040] It should be noted that during the operation of the component module 2, the location with the highest heat generation is generally located at the connection between the component 20 and the conductive member 21 and near the conductive member 21. Therefore, by filling the thermal conductive adhesive layer 3 between the component 20 and the conductive member 21, the heat dissipation effect here is specifically improved, thereby improving the heat dissipation protection of the component module 2.

[0041] In addition, it can be understood that, compared with not setting the thermal conductive adhesive layer 3, in order to prevent the short circuit between the component 20 and the conductive part 21, it is necessary to ensure that a sufficient safety distance is set between the component 20 and the conductive part 21 during the installation process, and usually this distance is not less than 10 mm.

[0042] After the thermal conductive adhesive layer 3 is filled between the components 20 and the conductive member 21, the thermal conductive adhesive layer 3 itself is made of insulating material, and it is only necessary to ensure that a gap is reserved between the components 20 and the conductive member 21 for the thermal conductive adhesive 3 to flow. This is conducive to achieving a more compact arrangement of the components 20 and the conductive member 21, which is conducive to further reducing the overall size of the battery distribution device and reducing the space occupied in the battery pack.

[0043] In some embodiments, the minimum distance between the component 20 and the conductive member 21 is c, satisfying 2 mm ≤ c ≤ 3 mm.

[0044] Specifically, c can be any one of 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, and 3mm, or a range value consisting of any two of them.

[0045] In addition, in some embodiments, the thermal conductive adhesive layer 3 is set to be a thermal conductive silicone material, which has good thermal conductivity, insulation and waterproof properties. The thermal conductivity coefficient of the thermal conductive adhesive layer 3 is a, and the thermal conductivity coefficient of air is b, satisfying a≥10b.

[0046] It should be noted that the thermal conductivity of air at a closed room temperature (20°C) is 0.0267W / (m·K), and when the temperature is 100°C, the thermal conductivity of air can rise to 0.032W / (m·K), and the normal operating temperature range of the battery pack is much lower than 100°C. The thermal conductivity of the thermally conductive silica gel used in this embodiment is generally higher than 0.32W / (m·K), so the heat dissipation effect of using the thermally conductive adhesive layer 3 to cover the component module 2 is much higher than the natural cooling of the component module 2.

[0047] In order to further improve the heat dissipation effect of the component module 2, in some embodiments, referring to Figures 2 to 5 The heat-conducting adhesive layer 3 is partially filled on the side of the conductive member 21 away from the component 20. During the molding process of the heat-conducting adhesive layer 3, part of the conductive member 21 can form a through hole 35 on the heat-conducting adhesive layer 3 to facilitate the conductive member 21 to be connected to the circuit. There are multiple heat exchange channels 30, at least part of which is arranged on the side of the conductive member 21 away from the component 20, and at least part of the heat exchange channels 30 is arranged between the conductive member 21 and the component 20.

[0048] Specifically, refer to Figure 4 For example, in this embodiment, two heat exchange channels 30 arranged on opposite sides of the conductive member 21 are taken as an example, aiming to improve the heat dissipation effect of the conductive member 21 where the heat dissipation of the component module 2 is the highest by assisting the circulation of the heat exchange fluid.

[0049] In addition, it can be understood that in other embodiments, as needed, the number of heat exchange channels 30 located on the side of the conductive member 21 away from the component 20 and between the conductive member 21 and the component 20 can be flexibly increased or decreased as needed, which will not be repeated here.

[0050] In addition, it can be understood that in other embodiments, as required, the heat exchange channel 30 can also be provided only between the conductive member 21 and the component 20 or only at the conductive member 21 away from the component 20, which will not be repeated here.

[0051] In order to further improve the heat dissipation effect of the component module 2, in some embodiments, referring to Figures 3 to 5 There are multiple heat exchange channels 30, and the multiple heat exchange channels 30 are arranged at intervals around the component module 2. That is, it can be understood that by arranging more heat exchange channels 30 around the component module 2, the heat dissipation area of ​​the thermal conductive adhesive layer 3 can be further increased and the heat dissipation effect can be improved.

[0052] In order to ensure that the heat exchange channel 30 has a good coverage, in some embodiments, refer to Figures 1 to 5 The thermal conductive adhesive layer 3 is provided with a liquid inlet 31 and a liquid outlet 32 ​​respectively connected to the heat exchange flow channel 30 , and the liquid inlet 31 and the liquid outlet 32 ​​are arranged on two opposite sides of the thermal conductive adhesive layer 3 .

[0053] In addition, in some embodiments, reference Figure 1 and Figure 2 The housing 1 also has an opening 11 connected to the accommodating cavity 10. The component module 2 disposed in the accommodating cavity 10 is immersed in the thermal conductive adhesive layer 3, and the thermal conductive adhesive layer 3 seals the opening 11. After the component 20 is completely immersed in the thermal conductive adhesive layer 3, good waterproof performance is guaranteed.

[0054] Specifically, in this embodiment, refer to Figure 1 and Figure 4 The thermal conductive adhesive layer 3 includes a main body 33 filled in the accommodating cavity 10 and a protruding portion 34 protruding from the opening 11, and the liquid inlet 31 and the liquid outlet 32 ​​are arranged on the protruding portion 34. At this time, the protruding portion 34 can replace the cover body used to cover the opening 11 of the traditional battery distribution device, on the one hand, further increasing the heat dissipation area of ​​the thermal conductive adhesive layer 3, and on the other hand, saving parts of the battery distribution device.

[0055] Accordingly, an embodiment of the present application provides an electric device, which includes the above-mentioned battery pack. The electric device can be an electronic device, a power storage device, or a power vehicle. It is understandable that the electric device can have all the technical features and corresponding beneficial effects of the above-mentioned battery pack, which will not be repeated here.

[0056] The above is a detailed introduction to a battery pack and electrical equipment provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: A battery power distribution device is included, wherein the battery power distribution device includes: A housing (1), wherein the housing (1) has a receiving chamber (10); A component module (2), the component module (2) being arranged in the accommodating cavity (10); A thermally conductive adhesive layer (3), wherein the thermally conductive adhesive layer (3) is at least partially disposed in the accommodating cavity (10), and the component module (2) is at least partially immersed in the thermally conductive adhesive layer (3), and the thermally conductive adhesive layer (3) is provided with a heat exchange flow channel (30).

2. The battery pack according to claim 1, characterized in that: The component module (2) comprises a plurality of components (20) and a conductive member (21) electrically connecting the plurality of components (20); The thermally conductive adhesive layer (3) is partially filled between the component (20) and the conductive member (21).

3. The battery pack according to claim 2, characterized in that: The thermally conductive adhesive layer (3) is partially filled on a side of the conductive member (21) facing away from the component (20); The heat exchange flow channels (30) are provided in plurality, and at least some of the heat exchange flow channels (30) are provided on a side of the conductive member (21) away from the component (20); And / or, at least part of the heat exchange channel (30) is arranged between the conductive member (21) and the component (20).

4. The battery pack according to claim 1, characterized in that: A plurality of the heat exchange channels (30) are provided, and the plurality of the heat exchange channels (30) are arranged at intervals on the peripheral side of the component module (2).

5. The battery pack according to claim 1, characterized in that: The thermally conductive adhesive layer (3) is provided with a liquid inlet (31) and a liquid outlet (32) respectively connected to the heat exchange flow channel (30), and the liquid inlet (31) and the liquid outlet (32) are arranged on opposite sides of the thermally conductive adhesive layer (3).

6. The battery pack according to claim 5, characterized in that: The housing (1) further comprises an opening (11) connected to the accommodating cavity (10); the component module (2) arranged in the accommodating cavity (10) is immersed in the thermal conductive adhesive layer (3); and the thermal conductive adhesive layer (3) seals the opening (11).

7. The battery pack according to claim 6, characterized in that: The thermally conductive adhesive layer (3) comprises a main body (33) filled in the accommodating cavity (10) and a protruding portion (34) protruding from the opening (11), and the liquid inlet (31) and the liquid outlet (32) are arranged on the protruding portion (34).

8. The battery pack according to claim 2, characterized in that: The minimum distance between the component (20) and the conductive member (21) is c, satisfying 2 mm ≤ c ≤ 3 mm.

9. The battery pack according to claim 1, characterized in that: The thermally conductive adhesive layer (3) is made of a thermally conductive silicone material, the thermal conductivity of the thermally conductive adhesive layer (3) is a, and the thermal conductivity of air is b, satisfying a≥10b.

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

Images