Battery bracket, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery bracket, a battery pack and electric equipment, the battery bracket comprises an outer bracket and an inner bracket, the inner bracket is located in the outer bracket, the inner bracket is connected with the outer bracket, the outer bracket and the inner bracket jointly define a plurality of accommodating cavities, and the peripheral side cavity walls of the accommodating cavities are used for surrounding the peripheral side of a battery. The heat conductivity coefficient of the outer support is larger than that of the inner support. The battery bracket disclosed by the utility model is relatively good in protection effect and heat dissipation effect on the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery holder, battery pack, and electrical device. Background Technology

[0002] Since the capacity of a single battery cell is limited, multiple single batteries can be integrated together by mounting brackets, and these single batteries can be connected in series or parallel to form a battery pack with a larger capacity.

[0003] In related technologies, the mounting bracket has multiple mounting cavities to accommodate individual cells. To dissipate heat from the individual cells, adjacent mounting cavities have gaps, allowing air to flow within these gaps to carry away the heat from the individual cells. However, since the mounting cavities do not completely enclose the outer wall of the individual cells, the mounting bracket provides poor protection for the individual cells, making them susceptible to mechanical damage. Utility Model Content

[0004] Based on this, embodiments of this application provide a battery holder, a battery pack, and an electrical device to address the shortcomings in related technologies.

[0005] In a first aspect, embodiments of this application provide a battery holder, which includes an outer holder and an inner holder. The inner holder is located inside the outer holder and is connected to the outer holder. The outer holder and the inner holder together define a plurality of receiving cavities. The peripheral walls of the receiving cavities are closed and are used to surround the outer periphery of the battery. The thermal conductivity of the outer holder is greater than that of the inner holder.

[0006] In one possible implementation, the thermal conductivity of the external support is greater than or equal to 1.0 W / (m·K);

[0007] And / or, the flame retardancy rating of the external support is greater than or equal to V-0.

[0008] In one possible implementation, the thermal conductivity of the internal support is less than or equal to 0.5 W / (m·K).

[0009] In one possible implementation, the inner side of the outer support has several first cavities, and the outer side of the inner support has several second cavities. The first cavities and the second cavities are arranged in a one-to-one correspondence, and the first cavities and the second cavities are assembled together to form a receiving cavity.

[0010] In one possible implementation, the battery holder also includes an end cap located at one end of the receiving cavity and connected to the outer support.

[0011] In one possible implementation, the inner side of the outer bracket has a mounting post, the inner side of the inner bracket has a mounting hole, the mounting post is inserted into the mounting hole, and the mounting post is connected to the end cap.

[0012] In one possible implementation, the battery holder further includes a threaded connector having an external thread, an end cap having a first connection hole, a mounting post having a second connection hole having an internal thread that matches the external thread, and the threaded connector passing through the first connection hole to be threadedly connected to the second connection hole.

[0013] In one possible implementation, the end cap has clearance holes, which are configured to correspond one-to-one with the receiving cavity.

[0014] In one possible implementation, the outer side of the outer bracket has a mounting slot for mounting a circuit board.

[0015] Secondly, this application provides a battery pack, including a battery and the battery holder provided in the first aspect, wherein the battery is disposed in a receiving cavity of the battery holder, and the peripheral cavity wall of the receiving cavity surrounds the outer periphery of the battery.

[0016] In one possible implementation, the battery pack further includes a circuit board and connecting pieces. The circuit board is connected to the outside of the outer support, and the connecting pieces include a positive connecting piece and a negative connecting piece. The positive connecting piece is electrically connected to the positive terminal of the battery, and the negative connecting piece is electrically connected to the negative terminal of the battery. Both the positive and negative connecting pieces are electrically connected to the circuit board.

[0017] Thirdly, this application provides an electrical device, including an electrical appliance and a battery pack provided in the second aspect above, the battery pack being used to supply power to the electrical appliance.

[0018] The battery holder provided in this application includes an outer holder and an inner holder. The outer and inner holders are used to form a receiving cavity to accommodate the battery. The peripheral cavity wall surrounds the outer periphery of the battery, thus preventing the battery from being bumped or knocked, thereby improving the protection effect of the battery holder. The thermal conductivity of the outer holder is greater than that of the inner holder, thereby reducing the thermal conductivity of the inner holder. This prevents the heat from multiple batteries from coupling to the inner holder and causing heat accumulation, and improves the thermal conductivity of the outer holder, allowing the heat from the battery to dissipate through the outer holder. Therefore, the battery holder can simultaneously improve the protection effect and heat dissipation effect of the battery.

[0019] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the battery bracket, battery pack, and electrical equipment provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0022] Figure 2 for Figure 1 Top view;

[0023] Figure 3 for Figure 1 Exploded view;

[0024] Figure 4 This is a schematic diagram of the structure of the battery holder provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the outer and inner supports in the battery holder provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the outer bracket in the battery holder provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the inner support in the battery holder provided in the embodiment of this application.

[0028] Figure label:

[0029] 1-Battery pack; 10-Battery bracket; 100-Outer bracket; 110-First cavity; 120-Mounting post; 121-Second connecting hole; 130-Mounting groove; 200-Inner bracket; 210-Second cavity; 220-Mounting hole; 300-Receiving cavity; 400-End cap; 410-First connecting hole; 420-Allowing hole; 500-Threaded connector; 20-Battery; 30-Circuit board; 40-Connecting piece; 40a-Positive electrode connecting piece; 40b-Negative electrode connecting piece.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0035] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0036] In related technologies, the mounting bracket has multiple mounting cavities to accommodate individual cells. To dissipate heat from the individual cells, adjacent mounting cavities have gaps, allowing air to flow within these gaps to carry away the heat from the individual cells. However, since the mounting cavities do not completely enclose the outer wall of the individual cells, the mounting bracket provides poor protection for the individual cells, making them susceptible to mechanical damage.

[0037] In view of this, embodiments of this application provide a battery holder, a battery pack, and an electrical device. The battery holder forms a receiving cavity for accommodating the battery by setting an outer support and an inner support. The periphery of the receiving cavity can surround the outer periphery of the battery to achieve complete encapsulation of the outer periphery of the battery, thereby preventing mechanical damage to the battery. Furthermore, the thermal conductivity of the outer support is greater than that of the inner support, thereby preventing thermal coupling between multiple batteries. The heat of the battery can be dissipated to the outside of the battery holder through the outer support. Thus, the battery holder has good protection and heat dissipation effects.

[0038] The following describes in detail, with reference to the accompanying drawings, the specific implementation methods of the battery bracket, battery pack and electrical equipment provided in the embodiments of this application.

[0039] Reference Figure 1 As shown in the figure, this application embodiment provides an electrical device, which includes an electrical device and a battery pack 1, the battery pack 1 being used to supply power to the electrical device.

[0040] For example, the electrical equipment can be a vehicle, the electrical device can be an electric motor, and the battery pack 1 can provide electrical energy to the electric motor, thereby driving the vehicle. The vehicle can be a pure electric vehicle, a range-extended electric vehicle, a hybrid electric vehicle, etc., and can also be any vehicle with a battery pack 1; this embodiment does not limit this.

[0041] For example, the electrical equipment can be a lamp, the electrical device can be a light source, and the battery pack 1 can provide power to the light source, thereby enabling the light source to emit light.

[0042] Reference Figures 1 to 3 As shown, based on the above embodiments, this application also provides a battery pack 1, which includes a battery 20 and a battery bracket 10. The battery 20 is disposed in the receiving cavity 300 of the battery bracket 10, and the peripheral cavity wall of the receiving cavity 300 surrounds the outer periphery of the battery 20.

[0043] In this way, the battery pack 1 has multiple batteries 20, which can be integrated together by the battery bracket 10 to form a battery pack 1 with a larger capacity. At the same time, since the peripheral cavity wall of the receiving cavity 300 surrounds the outer periphery of the battery 20, the protective effect of the battery bracket 10 on the battery 20 can be improved, thereby preventing the battery 20 from being mechanically damaged.

[0044] Reference Figures 4 to 7 As shown, based on the above embodiments, this application also provides a battery holder 10, which includes an outer holder 100 and an inner holder 200. The inner holder 200 is located inside the outer holder 100 and is connected to the outer holder 100. The outer holder 100 and the inner holder 200 together define a plurality of receiving cavities 300. The peripheral cavity walls of the receiving cavities 300 are closed and are used to surround the outer periphery of the battery 20. The thermal conductivity of the outer holder 100 is greater than that of the inner holder 200.

[0045] In this embodiment, the receiving cavity 300 is used to receive the battery 20. That is, the battery 20 can be arranged one-to-one with the receiving cavity 300, so that each battery 20 can be housed in the corresponding receiving cavity 300. The peripheral cavity wall of the receiving cavity 300 is closed and surrounds the outer periphery of the battery 20. In this way, the peripheral cavity wall of the receiving cavity 300 can completely cover the outer wall of the battery 20, thereby providing more comprehensive protection for the battery 20 and preventing mechanical damage caused by impact or other factors.

[0046] The cross-section of the receiving cavity 300 may be circular to accommodate a cylindrical battery 20, or the cross-section of the receiving cavity 300 may be square to accommodate a square battery 20. This application embodiment does not limit the specific type of battery 20.

[0047] It should be understood that if the battery bracket 10 is made in one piece and is made entirely of the same material, the following problems will exist: firstly, it is less convenient to process; secondly, it is not conducive to heat dissipation of the battery 20.

[0048] Therefore, in order to prevent thermal coupling between multiple batteries 20 and improve the heat dissipation effect of batteries 20, an inner support 200 can be set inside the outer support 100. In this way, part of the peripheral cavity wall of the receiving cavity 300 is formed by the outer support 100, and the remaining part of the peripheral cavity wall of the receiving cavity 300 is formed by the inner support 200. This allows part of the outer wall of the battery 20 to contact the outer support 100, and the remaining part of the outer wall of the battery 20 to contact the inner support 200. Furthermore, the side of the multiple batteries 20 that are close to each other is in contact with the inner support 200. Since the thermal conductivity of the outer support 100 is greater than that of the inner support 200, the thermal conductivity of the inner support 200 is poor. The inner support 200 will not couple the heat of multiple batteries 20, causing heat to accumulate inside the battery holder 10. The thermal conductivity of the outer support 100 is better, and the outer support 100 can conduct the heat of the battery 20 to the outside of the battery holder 10, thus improving the heat dissipation effect of the battery 20.

[0049] The battery holder 10 provided in this embodiment includes an outer holder 100 and an inner holder 200. The outer holder 100 and the inner holder 200 are configured to jointly form a receiving cavity 300 for accommodating a battery 20. The peripheral cavity wall of the receiving cavity 300 surrounds the outer periphery of the battery 20, thereby preventing relative displacement between the battery 20 and the battery holder 10 and improving the protection effect of the battery holder 10 on the battery 20. By making the thermal conductivity of the outer holder 100 greater than that of the inner holder 200, the thermal conductivity of the inner holder 200 is reduced, thus preventing the heat from multiple batteries 20 from coupling to the inner holder 200 and causing heat accumulation. The thermal conductivity of the outer holder 100 is also improved, allowing the heat from the battery 20 to dissipate through the outer holder 100. Therefore, the battery holder 10 can simultaneously improve the protection effect and heat dissipation effect of the battery 20.

[0050] In one possible implementation, the thermal conductivity of the outer bracket 100 is greater than or equal to 1.0 W / (m·K). This configuration allows the outer bracket 100 to have good thermal conductivity, enabling it to efficiently conduct heat from the battery 20 to the outside of the battery bracket 10, thereby improving the heat dissipation effect of the battery 20.

[0051] In some embodiments, the flame retardant rating of the outer bracket 100 is greater than or equal to V-0. This configuration allows the outer bracket 100 to have both good heat dissipation and flame retardant properties. Thus, in the event of a fire caused by thermal runaway of the battery 20, the outer bracket 100 can prevent the flames from spreading to other devices, thereby preventing the fire from escalating. Furthermore, when one battery 20 catches fire, because that battery 20 is enclosed within its corresponding receiving cavity 300, the fire can be prevented from spreading to other batteries 20.

[0052] For example, the material of the outer support 100 may include aluminum, which is lightweight and has good thermal conductivity. Alternatively, the material of the outer support 100 may include thermally conductive plastic, that is, metal particles or thermally conductive fibers are added to the plastic matrix, or flame retardants are added to the plastic matrix. In this way, the outer support 100 can have both good thermal conductivity and flame retardant properties.

[0053] In one possible implementation, the thermal conductivity of the inner support 200 is less than or equal to 0.5 W / (m·K). It is understood that when the thermal conductivity of the inner support 200 is less than or equal to 0.5 W / (m·K), the inner support 200 has a low thermal conductivity and poor thermal conductivity, which in turn results in poor thermal conductivity of the circumferential cavity wall of the receiving cavity 300 facing the middle of the battery holder 10, thereby preventing thermal coupling between the individual batteries 20.

[0054] For example, the internal support 200 can be made of plastics such as polyethylene and polypropylene.

[0055] Reference Figures 5 to 7 As shown, in some embodiments, the inner side of the outer support 100 has a plurality of first cavities 110, and the outer side of the inner support 200 has a plurality of second cavities 210. The first cavities 110 and the second cavities 210 are arranged in a one-to-one correspondence, and the first cavities 110 and the second cavities 210 are assembled together to form a receiving cavity 300.

[0056] In other words, the cavity wall of the first cavity 110 constitutes part of the cavity wall of the receiving cavity 300, and the cavity wall of the second cavity constitutes the remaining cavity wall of the receiving cavity 300. In this way, since the outer support 100 is made of a material with a high thermal conductivity, the cavity wall of the first cavity 110 has good thermal conductivity, which is conducive to the heat of the battery 20 being transferred to the outside of the battery support 10 through the cavity wall of the first cavity 110. On the other hand, the inner support 200 is made of a material with a low thermal conductivity, and the cavity wall of the second cavity 210 has poor thermal conductivity, which can prevent the heat of one battery 20 from being transferred to another battery 20 through the cavity wall of the second cavity 210, thereby effectively preventing thermal coupling between the batteries 20.

[0057] In one possible implementation, the battery holder 10 further includes an end cap 400 located at one end of the receiving cavity 300 and connected to the outer bracket 100.

[0058] Thus, after the battery 20 is installed in the receiving cavity 300, the circumferential cavity wall of the receiving cavity 300 covers the outer wall of the battery 20. The end wall of the receiving cavity 300 away from the end cover 400 can limit one end of the battery 20. After the end cover 400 is connected to the outer bracket 100, the end cover 400 can limit the other end of the battery 20, thereby completely restricting the degree of freedom of the battery 20 to prevent relative displacement between the battery 20 and the battery bracket 10.

[0059] Reference Figure 4 , Figure 6 and Figure 7 As shown, in some embodiments, the inner side of the outer bracket 100 has a mounting post 120, the inner side of the inner bracket 200 has a mounting hole 220, the mounting post 120 is inserted into the mounting hole 220, and the mounting post 120 is connected to the end cap 400.

[0060] In other words, after the mounting post 120 is inserted into the mounting hole 220, the end cap 400 is then connected to the mounting post 120, so that the outer bracket 100, the inner bracket 200 and the end cap 400 can be assembled into a whole, thereby confining the battery 20 within the receiving cavity 300.

[0061] Reference Figure 3 and Figure 6 As shown, in one possible implementation, the battery holder 10 further includes a threaded connector 500 having an external thread, the end cap 400 having a first connection hole 410, the mounting post 120 having a second connection hole 121 having an internal thread that matches the external thread, and the threaded connector 500 passing through the first connection hole 410 to be threadedly connected to the second connection hole 121.

[0062] Thus, after the mounting post 120 is inserted into the mounting hole 220, it is then threadedly connected to the mounting post 120 via the threaded connector 500. The head of the threaded connector 500 can stop on the outside of the end cover 400 away from the receiving cavity 300, thereby connecting the outer bracket 100, the inner bracket 200 and the end cover 400 together.

[0063] Reference Figure 4 As shown, in some embodiments, the end cap 400 has a clearance hole 420, which is provided in a one-to-one correspondence with the receiving cavity 300.

[0064] It should be noted that each battery 20 may have a terminal post or other structure at its end, and then be connected to the terminal post through a connecting piece 40 to conduct the current of the battery 20 to other devices. By setting a clearance hole 420 on the end cover 400 and setting the clearance hole 420 to correspond to the battery 20, the terminal post or other structure can be avoided through the clearance hole 420, so that the terminal post of each battery 20 can be connected to the connecting piece 40.

[0065] Reference Figure 3 , Figure 4 As shown, in one possible implementation, the outer bracket 100 has a mounting groove 130 on its outer side for mounting the circuit board 30.

[0066] It is understood that the battery 20 can store and release electrical energy, and the circuit board 30 can be used to manage the current, voltage, temperature, etc. of the battery 20, thereby maintaining the normal working state of the battery 20. By setting the receiving cavity 300 and the mounting slot 130 on the battery bracket 10, the battery bracket 10 can integrate the battery 20, the circuit board 30, etc. together to form the battery pack 1.

[0067] Reference Figure 3 As shown, in some embodiments, the battery pack 1 further includes a circuit board 30 and a connecting piece 40. The circuit board 30 is connected to the outside of the outer bracket 100. The connecting piece 40 includes a positive electrode connecting piece 40a and a negative electrode connecting piece 40b. The positive electrode connecting piece 40a is electrically connected to the positive electrode of the battery 20, and the negative electrode connecting piece 40b is electrically connected to the negative electrode of the battery 20. Both the positive electrode connecting piece 40a and the negative electrode connecting piece 40b are electrically connected to the circuit board 30.

[0068] Therefore, the battery bracket 10 can be used to mount the circuit board 30 and multiple batteries 20, and then the positive electrode of each battery 20 is electrically connected to the circuit board 30 through the positive electrode connecting piece 40a, and the negative electrode of each battery 20 is electrically connected to the circuit board 30 through the negative electrode connecting piece 40b, so that the working status of each battery 20 can be monitored through the circuit board 30.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery holder, characterized in that, include: External support (100); An inner support (200) is located inside the outer support (100) and is connected to the outer support (100). The outer support (100) and the inner support (200) together define a plurality of receiving cavities (300). The peripheral cavity walls of the receiving cavities (300) are closed and are used to surround the outer periphery of the battery (20). The thermal conductivity of the outer support (100) is greater than that of the inner support (200).

2. The battery holder according to claim 1, characterized in that, The thermal conductivity of the outer support (100) is greater than or equal to 1.0 W / (m·K); And / or, the flame retardancy rating of the outer support (100) is greater than or equal to V-0.

3. The battery holder according to claim 1, characterized in that, The thermal conductivity of the inner support (200) is less than or equal to 0.5 W / (m·K).

4. The battery holder according to any one of claims 1-3, characterized in that, The inner side of the outer support (100) has a plurality of first cavities (110), and the outer side of the inner support (200) has a plurality of second cavities (210). The first cavities (110) and the second cavities (210) are arranged in a one-to-one correspondence, and the first cavities (110) and the second cavities (210) are assembled together to form the receiving cavity (300).

5. The battery holder according to any one of claims 1-3, characterized in that, It also includes an end cap (400) located at one end of the receiving cavity (300) and connected to the outer support (100).

6. The battery holder according to claim 5, characterized in that, The outer bracket (100) has a mounting post (120) on its inner side, and the inner bracket (200) has a mounting hole (220) on its inner side. The mounting post (120) is inserted into the mounting hole (220), and the mounting post (120) is connected to the end cap (400).

7. The battery holder according to claim 6, characterized in that, It also includes a threaded connector (500) having an external thread, the end cap (400) having a first connecting hole (410), the mounting post (120) having a second connecting hole (121) having an internal thread that matches the external thread, the threaded connector (500) passing through the first connecting hole (410) to be threadedly connected to the second connecting hole (121).

8. The battery holder according to claim 5, characterized in that, The end cap (400) has a clearance hole (420), which is provided in a one-to-one correspondence with the receiving cavity (300).

9. The battery holder according to any one of claims 1-3, characterized in that, The outer bracket (100) has a mounting groove (130) on its outer side, which is used to mount the circuit board (30).

10. A battery pack, characterized in that, Includes a battery (20) and a battery holder (10) according to any one of claims 1-9, wherein the battery (20) is disposed in the receiving cavity (300) of the battery holder (10), and the peripheral cavity wall of the receiving cavity (300) surrounds the outer periphery of the battery (20).

11. The battery pack according to claim 10, characterized in that, It also includes a circuit board (30) and a connecting piece (40), the circuit board (30) being connected to the outside of the outer bracket (100), and the connecting piece (40) including a positive electrode connecting piece (40a) and a negative electrode connecting piece (40b). The positive electrode connector (40a) is electrically connected to the positive electrode of the battery (20), the negative electrode connector (40b) is electrically connected to the negative electrode of the battery (20), and both the positive electrode connector (40a) and the negative electrode connector (40b) are electrically connected to the circuit board (30).

12. An electrical appliance, characterized in that, It includes an electrical device and a battery pack (1) as described in claim 10 or 11, the battery pack (1) being used to supply power to the electrical device.

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