Battery box and electric device

Abstract

The utility model belongs to the field of batteries, and particularly relates to a battery box and an electric device, the battery box comprises a box body, a battery module positioned in the box body and a cover body covering the box body, the box body is internally provided with insulating cooling liquid, and the battery module is immersed in the insulating cooling liquid; the battery box further comprises a control element, a sealing groove is formed in the box body, the sealing groove is sealed through sealant, at least part of the control element is located in the sealing groove, the control element is electrically connected with the battery module through a connecting piece, the connecting piece is communicated with the control element, and at least part of the connecting piece is located in the sealing groove. According to the utility model, the battery module is immersed by the insulating cooling liquid, so that the heat dissipation is uniform, and the safety performance of the battery box can be improved; meanwhile, the sealing groove can improve the air tightness of the box body and fix the position of the connecting piece, so that the safety of the battery box is improved. In addition, the utility model further discloses electric equipment comprising the battery box.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery box and an electrical device. Background Art

[0002] Nowadays, with the development of modern society and the enhancement of people's environmental awareness, more and more devices choose lithium-ion batteries as power sources, such as mobile phones, laptops, power tools and electric vehicles, which provides a broad space for the application and development of lithium-ion batteries. Among them, in order to meet the power demand, most batteries use high-power charging. High-power charging will inevitably bring about the problem of rapid temperature rise of the battery. In the existing battery system, the positional relationship between the coolant and the control element of the control battery module is not taken into account, which makes it easy for the plug or converter of the control element to be connected to the box to leak, resulting in reduced safety. For this reason, it is urgent to propose a new technical solution to solve the above problems. Utility Model Content

[0003] One of the purposes of the utility model is to provide a battery box to address the deficiencies of the prior art, which ensures the sealing of the control element by providing a sealing groove, thereby improving the safety of the battery box.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A battery box comprises a box body, a battery module located in the box body and a cover body arranged on the box body, wherein an insulating coolant is arranged in the box body, and the insulating coolant immerses the battery module; the battery box also comprises a control element, a sealing groove is arranged in the box body, the sealing groove is sealed by a sealant, the control element is at least partially located in the sealing groove, the control element is electrically connected to the battery module through a connector, the connector is communicated with the control element and is at least partially located in the sealing groove.

[0006] In the utility model, the insulating coolant immerses the battery module, so that the heat dissipation of the battery module is uniform and the temperature of the battery module can be quickly reduced, thereby meeting the needs of high-rate charging and extending its cycle life. At the same time, the insulating coolant can fully submerge the battery module in the early stage of thermal runaway, thereby improving the safety performance of the battery box.

[0007] As an improvement of the battery box described in the utility model, the control element includes a detection system and a power output port, and the detection system and the power output port are both arranged on the outside of the box relative to the battery module. The power output port is used for the output of power to ensure the realization of the basic functions of the battery box. The detection system can perform voltage detection, current detection, temperature detection, insulation detection, relay status detection and other status detections on the battery module. When the battery module is in an abnormal state, the battery box is powered off and an alarm is sounded.

[0008] As an improvement of the battery box described in the utility model, the detection system includes a detection component and an adapter connected to the detection component, and the detection component is electrically connected to the battery module through the adapter.

[0009] As an improvement of the battery box described in the utility model, the sealing groove includes a first sealing groove, and one end of the adapter located in the box body is arranged in the first sealing groove and connected to the connecting member.

[0010] As an improvement of the battery box described in the utility model, the sealing groove also includes a second sealing groove, and one end of the power output port located in the box body is arranged in the second sealing groove and connected to the connecting piece.

[0011] In the utility model, the sealed sealing groove provides secondary protection for the connection between the control element and the box body, thereby avoiding the possibility of the insulating coolant overflowing from the above connection, improving the sealing of the box body, and further increasing the service life of the battery box.

[0012] As an improvement of the battery box described in the utility model, the first sealing groove, the second sealing groove and the connecting piece are all immersed in the insulating coolant, so that all electrical connection parts in the battery box are immersed in the insulating coolant, and when poor insulation and arcing occur, the insulating coolant can quickly and comprehensively cool down and extinguish the arc.

[0013] As an improvement of the battery box described in the utility model, a liquid injection hole is arranged on the cover body, and a water retaining member is arranged in the box body, and the water retaining member is arranged corresponding to the liquid injection hole. The water retaining member can prevent the insulating coolant from flowing directly to the liquid injection hole, thereby increasing the flow resistance of the insulating coolant, and thereby making the insulating coolant flow to the end of the box body away from the liquid injection hole, reducing the difficulty of liquid injection.

[0014] As an improvement of the battery box described in the utility model, the liquid injection hole is provided with an explosion-proof valve, and a sealing member is provided under the cover body. The explosion-proof valve and the sealing member are used to seal the box body. The explosion-proof valve is configured as a breathable explosion-proof valve that can balance the internal and external air pressure of the box body and play an explosion-proof role; the sealing member further increases the airtightness of the box body.

[0015] As an improvement of the battery box described in the utility model, a protective sheet is arranged in the box, and the protective sheet is located between the battery module and the inner wall of the box. The protective sheet is used to prevent the battery module from being scratched by the burrs of the box, and to prevent the battery cells in the battery module from directly contacting the inner wall of the box, thereby avoiding the box from being charged, and further increasing the safety performance of the battery box.

[0016] The second purpose of the utility model is to provide an electrical device, including the battery box as described above.

[0017] The beneficial effect of the utility model is that the battery box of the utility model comprises a box body, a battery module located in the box body, and a cover body provided on the box body, an insulating coolant is provided in the box body, and the insulating coolant immerses the battery module; the battery box also comprises a control element, a sealing groove is provided in the box body, the sealing groove is sealed by a sealant, the control element is at least partially located in the sealing groove, the control element is electrically connected to the battery module through a connector, the connector is connected to the control element and is at least partially located in the sealing groove. In the utility model, by immersing the battery module with insulating coolant, the battery module can be evenly dissipated, thereby making the internal temperature control of the battery box more stable, reducing the temperature extreme difference of each component of the battery box, extending the cycle life of the battery module in the battery box, and when the battery box has a safety problem, the immersion liquid can quickly insulate and extinguish the arc, play a role in fire safety, and thus meet the use requirements of high-rate charging and discharging; at the same time, the setting of the sealing groove seals the connection between the box body and the control element, preventing the possibility of insulating coolant overflowing from the connection, and further increasing the safety performance of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0019] Figure 1 This is one of the structural schematic diagrams of the utility model.

[0020] Figure 2 This is the second structural diagram of the utility model (without cover).

[0021] The reference numerals are described as follows:

[0022] 1-Box;

[0023] 2-Battery module;

[0024] 3-cover body;

[0025] 4-control element; 41-detection system; 411-detection component; 412-adapter; 42-power output port;

[0026] 5- sealing groove; 51- first sealing groove; 52- second sealing groove;

[0027] 6-Connector;

[0028] 7-water retaining member;

[0029] 8- Explosion-proof valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific implementation methods and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0032] Reference to "embodiment" in this application means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0035] The term "plurality" used in the present application refers to two or more (including two).

[0036] In the present application, the battery module is composed of a plurality of battery cells, and the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the implementation methods of the present application do not limit this. The battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the implementation methods of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the implementation methods of the present application do not limit this.

[0037] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery safety must also be considered.

[0038] For a battery box composed of multiple battery modules, since it needs to meet the function of high-power charging and discharging, its safety mainly needs to consider the heat dissipation problem during the charging and discharging process. In view of this, the embodiment of the present application provides a technical solution, immersing the battery module in insulating coolant so that the battery module dissipates heat evenly, thereby improving the cycle performance of the battery module; at the same time, a sealing groove is set to seal the connection between the box body and the control element to prevent the plug or adapter of the control element from directly contacting the insulating coolant and increase the sealing of the box body, thereby improving the safety performance of the battery box.

[0039] The following is combined with Figure 1~2 The utility model is further described in detail with specific implementation modes, but is not intended to limit the utility model.

[0040] A battery box includes a box body 1, a battery module 2 located in the box body 1, a cover body 3 covering the box body 1, and a control element 4 arranged on the box body 1 on the outside of the battery module 2, wherein the control element 4 is electrically connected to the battery module 2. The control element 4 includes a detection system 41 and a power output port 42, wherein the detection system 41 includes a detection component 411 and an adapter 412 connected to the detection component 411, wherein the detection component 411 is electrically connected to the battery module 2 through the adapter 412, and the power output port 42 is used for power output to ensure the realization of the basic charging and discharging functions of the battery box, and the detection system 41 can perform voltage detection, current detection, temperature detection, insulation detection, relay status detection and other status detection on the battery module 2, and when the battery module 2 is in an abnormal state, the battery box is powered off and an alarm is sounded.

[0041] Preferably, an insulating coolant is provided in the box body 1, and the insulating coolant immerses the battery module 2, so that the heat dissipation of the battery module 2 is uniform and the temperature of the battery module 2 can be quickly reduced, thereby making the temperature control inside the battery box more stable, reducing the temperature extremes of various components of the battery box, extending the cycle life of the battery module in the battery box, and thus meeting the needs of high-rate charging; at the same time, the insulating coolant can fully submerge the battery module 2 in the early stage of thermal runaway. When a safety problem occurs in the battery box, the immersion liquid can quickly insulate and extinguish the arc, play a role in fire safety, and improve the safety performance of the battery box. In this embodiment, the insulating coolant uses an insulating fluorinated liquid, and can also use other insulating inert liquids. It can be adjusted according to actual conditions without making specific settings.

[0042] In some other embodiments, circulation devices such as pipes, motors and liquid storage boxes can be added to allow the insulating coolant to flow in the circulation device and the box 1 to further increase the cooling effect. It should be noted that in this technical solution, attention should be paid to the installation and fixation of the battery module 2 and related electrical connection components.

[0043] Preferably, a sealing groove 5 is provided in the box body 1. In the present embodiment, the sealing groove 5 is sealed by plastic, and other glues or materials with sealing function can also be used for sealing without specific requirements. The sealing groove 5 includes a first sealing groove 51 and a second sealing groove 52. The end of the adapter 412 located in the box body 1 is arranged in the first sealing groove 51, and the adapter 412 is electrically connected to the battery module 2 through the connector 6. The end of the power output port 42 located in the box body 1 is arranged in the second sealing groove 52, and the power output port 42 is electrically connected to the battery module 2 through the connector 6. The sealing groove 5 seals the connection between the control element 4 and the box body 1, realizes secondary protection, avoids the possibility of insulating coolant overflowing from the above-mentioned connection, and improves the sealing of the box body 1. At the same time, the sealing groove 5 can fix the position of the connector 6, increase the connection strength between the connector 6 and the control element 2, and isolate the connection port of the control element 2 from the insulating coolant to prevent circuit damage, thereby improving the service life of the battery box.

[0044] It is understandable that the number of the sealing grooves 5 can be set to be multiple, and can be adjusted according to the number of the control elements 4 and the positional relationship between the control elements 4 and the box body 1, and no specific setting is made.

[0045] In this embodiment, a plurality of battery modules 2 are provided, and a protective sheet is provided between the battery module 2 and the inner wall of the box body 1 to prevent the battery module 2 from being scratched by the burrs of the box body 1, and to prevent the battery cells in the battery module 2 from directly contacting the inner wall of the box body 1, thereby avoiding the box body 1 from being charged, and further increasing the safety performance of the battery box; the connecting piece 6 adopts a copper busbar and an electric wire, wherein the copper busbar not only plays the role of power output, but is also used for connection between the battery modules 2, and can also be adjusted according to actual conditions and usage requirements, and no specific setting is made.

[0046] In this embodiment, the first sealing groove 51, the second sealing groove 52, the connector 6 and the battery module 2 are all immersed in insulating coolant, so that all electrical connection parts in the battery box are immersed in insulating coolant. When poor insulation and arcing occur, the insulating coolant can quickly and comprehensively cool down and extinguish the arc.

[0047] Preferably, a liquid injection hole is provided on the cover body 3, and a water retaining member 7 is provided in the box body 1. The water retaining member 7 is provided corresponding to the liquid injection hole, and the liquid injection hole is provided with an explosion-proof valve 8. A sealing member is provided below the cover body 3, and the explosion-proof valve 8 and the sealing member are used to seal the box body 1; the water retaining member 7 is provided corresponding to the liquid injection hole, and the water retaining member 7 can prevent the insulating coolant from flowing directly to the liquid injection hole, thereby increasing the flow resistance of the insulating coolant, and thereby making the insulating coolant flow to the end of the box body 1 away from the liquid injection hole, thereby reducing the difficulty of liquid injection; the explosion-proof valve 8 is provided as a breathable explosion-proof valve, which can balance the internal and external air pressure of the box body 1 and play an explosion-proof role; the sealing member further increases the air tightness of the box body. In this embodiment, the sealing member is provided as a plurality of silicone pads between the box body 1 and the cover body 3, and can also be provided as a sealing pad below the cover body 3 and with the same area as the opening area of ​​the box body 1. It should be noted that the sealing pad needs to reserve a hole position corresponding to the liquid injection hole, and no specific regulations are made.

[0048] The installation method of the battery box in this embodiment is as follows: the battery module 2 and the control element 4 are connected by the connector 6 and are both installed in the box body 1, and then the sealing groove 5 is sealed with plastic, and then the cover body 3 is sealed, and the insulating coolant is injected into the box body 1 through the injection hole, and finally the injection hole is sealed with an explosion-proof valve 8.

[0049] Electrical devices

[0050] An electric device includes the above-mentioned battery box, and the battery module 2 can be a lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc. Among them, the electric device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, and an electric tool. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer. The embodiment of the present application does not impose any special restrictions on the above-mentioned electric device. According to the disclosure and teaching of the above-mentioned specification, the technicians in the field to which the utility model belongs can also change and modify the above-mentioned implementation. Therefore, the present invention is not limited to the above-mentioned specific embodiments, and any obvious improvement, replacement or modification made by a person skilled in the art on the basis of the present invention belongs to the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A battery box, characterized in that: The battery box comprises a box body (1), a battery module (2) located in the box body (1), and a cover body (3) covered on the box body (1), wherein an insulating coolant is provided in the box body (1), and the insulating coolant immerses the battery module (2); the battery box further comprises a control element (4), a sealing groove (5) is provided in the box body (1), the sealing groove (5) is sealed by a sealing glue, the control element (4) is at least partially located in the sealing groove (5), the control element (4) is electrically connected to the battery module (2) via a connecting piece (6), and the connecting piece (6) is in communication with the control element (4) and is at least partially located in the sealing groove (5).

2. The battery box according to claim 1, characterized in that: The control element (4) comprises a detection system (41) and a power output port (42), and the detection system (41) and the power output port (42) are both arranged on the outer side of the box (1) relative to the battery module (2).

3. The battery box according to claim 2, characterized in that: The detection system (41) comprises a detection component (411) and an adapter (412) connected to the detection component (411); the detection component (411) is electrically connected to the battery module (2) via the adapter (412).

4. The battery box according to claim 3, characterized in that: The sealing groove (5) comprises a first sealing groove (51), and one end of the adapter (412) located in the box body (1) is arranged in the first sealing groove (51) and is connected to the connecting member (6).

5. The battery box according to claim 4, characterized in that: The sealing groove (5) further comprises a second sealing groove (52), and one end of the power output port (42) located in the box body (1) is arranged in the second sealing groove (52) and connected to the connecting member (6).

6. The battery box according to claim 5, characterized in that: The first sealing groove (51), the second sealing groove (52) and the connecting piece (6) are all immersed in the insulating coolant.

7. The battery box according to claim 1, characterized in that: The cover body (3) is provided with a liquid injection hole, and the box body (1) is provided with a water retaining member (7), the water retaining member (7) being arranged corresponding to the liquid injection hole.

8. The battery box according to claim 7, characterized in that: The liquid injection hole is provided with an explosion-proof valve (8), and a sealing member is provided below the cover body (3). The explosion-proof valve (8) and the sealing member are used to seal the box body (1).

9. The battery box according to claim 1, characterized in that: A protective sheet is provided inside the box (1), and the protective sheet is located between the battery module (2) and the inner wall of the box (1).

10. An electrical device, characterized in that: Comprising a battery box as described in any one of claims 1-9.

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