Battery box

Abstract

The utility model relates to the technical field of energy storage batteries, and discloses a battery box. The battery box comprises a box body, a battery module, a liquid cooling medium and a fan, the battery module is arranged in the box body, a liquid cooling medium is contained in the box body, the battery module is immersed in the liquid cooling medium, and the liquid cooling medium can dissipate heat of the battery module. Meanwhile, the fan liquid is arranged in the box body, and the fan is immersed in the liquid cooling medium and used for stirring the liquid cooling medium. Therefore, the liquid cooling medium can be stirred by the fan to be pushed to each place in the box body, and a plurality of surfaces of the battery module can be cooled, so that the situation that the whole cooling and heat dissipation are realized through heat conduction in the battery cell due to the fact that the battery module is only locally cooled is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a battery box. Background Art

[0002] A battery box is a group of batteries consisting of several single cells, a box body, a battery management system, and related mounting structures (equipment). It has a standard battery box structure, battery box monitoring equipment, battery box connectors, battery box environmental control equipment, etc.

[0003] Typically, when cooling the cells inside a battery box, a liquid cooling plate is placed at the bottom of the cells, with liquid cooling media circulating through the plate for heat exchange. The liquid cooling plate and the box can also be structurally integrated. However, the liquid cooling plate is usually placed at the bottom of the cells, which provides localized heat dissipation, requiring heat conduction within the cells to achieve overall cooling and heat dissipation. Using a liquid cooling plate also requires external water lines and a water cooling unit, resulting in higher costs. Furthermore, leakage from the liquid cooling plate can lead to the risk of module short circuits.

[0004] Therefore, there is an urgent need for a battery box that can solve the problem of small heat dissipation range of local contact heat dissipation, achieve large-area heat dissipation, and improve heat dissipation efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a battery box, which can solve the problem of small heat dissipation range of local contact heat dissipation, realize large-area heat dissipation, and improve heat dissipation efficiency.

[0006] As conceived above, the technical solution adopted by the present utility model is:

[0007] A battery box, comprising:

[0008] A box body containing a liquid cooling medium for dissipating heat from components in the box body;

[0009] A battery module, the battery module is placed in the box and immersed in the liquid cooling medium;

[0010] A fan is placed in the box and immersed in the liquid cooling medium, and is used to stir the liquid cooling medium.

[0011] As an optional solution of the battery box, the number of the battery modules is set to at least two, the number of the fans is set to at least one, and the fan is provided between at least two of the battery modules;

[0012] And / or, the fan is fixedly connected to the bottom of the inner side of the box.

[0013] As an optional solution for the battery box, the liquid level of the liquid cooling medium in the box is equal to or higher than the top surface height of the battery module.

[0014] As an optional solution for the battery box, a bracket is provided inside the box, and the battery module is placed on the bracket for suspending the battery module in the box.

[0015] As an optional solution of the battery box, the box body is made of metal material.

[0016] As an optional solution for the battery box, the box body is formed by connecting the plates through full welding;

[0017] And / or, the box body includes a main body and a box cover that are connected, and a sealing device is provided between the main body and the box cover.

[0018] As an optional solution of the battery box, the battery box also includes a battery management system, which is arranged in the box body and is electrically connected to the battery module for monitoring the status of the battery module.

[0019] As an optional solution for the battery box, a communication port is provided on the box body, and the communication port is electrically connected to the battery management system and is used to transmit signals received by the battery management system to the outside world.

[0020] As an optional solution for the battery box, a high-voltage socket is provided on the box body, which includes a positive socket and a negative socket. The positive socket is connected to the positive pole of the battery module, and the negative socket is connected to the negative pole of the battery module. The high-voltage socket is used to supply power to the outside world.

[0021] As an optional solution for the battery box, a connector is provided inside the box, one end of the connector is connected to the positive pole socket, the other end of the connector is connected to the positive pole socket, and the connector is connected to the battery module for connecting the battery module in series or in parallel.

[0022] The beneficial effects of the utility model are:

[0023] The utility model proposes a battery box, in which a battery module, a liquid cooling medium and a fan are all placed in the box, the battery module and the electric fan are immersed in the liquid cooling medium, and the fan is used to stir the liquid cooling medium. The liquid cooling medium is stirred by the fan so that the liquid cooling medium can be distributed in various areas of the box and the battery module, so that multiple surfaces of the battery module can contact the liquid cooling medium. At this time, the liquid cooling medium can dissipate heat for the battery module, so that the battery module can be dissipated over a large area. There will be no situation where the cooling system can only dissipate heat locally, and there will be no situation where overall cooling and heat dissipation must be achieved through heat conduction inside the battery cell in order to dissipate heat as a whole. This avoids the situation where problems in any step of heat conduction will cause damage to the entire battery module or even the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first schematic diagram of a battery box provided by an embodiment of the present utility model;

[0025] Figure 2 This is a second schematic diagram of a battery box provided by an embodiment of the present utility model;

[0026] Figure 3 This is a third schematic diagram of a battery box provided by an embodiment of the present utility model;

[0027] Figure 4 It is a cross-sectional view of the battery box provided by an embodiment of the present utility model.

[0028] In the picture:

[0029] 1. Box body; 11. Main body; 12. Box cover;

[0030] 2. Battery module; 3. Liquid cooling medium; 4. Fan; 5. Connection components; 6. Battery management system; 7. Communication port;

[0031] 8. High voltage socket; 81. Positive socket; 82. Negative socket;

[0032] 9. Fuse. DETAILED DESCRIPTION

[0033] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0034] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this invention based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figure 1As shown, this embodiment discloses a battery box, which includes a box body 1, a liquid cooling medium 3, a battery module 2 and a fan 4. The box body 1 contains a liquid cooling medium 3, which is used to dissipate heat from the components in the box body 1. The battery module 2 is placed in the box body 1, and the battery module 2 is immersed in the liquid cooling medium 3, so that the liquid cooling medium 3 can dissipate heat from the battery module 2. The fan 4 is arranged in the box body 1, and the fan 4 is immersed in the liquid cooling medium 3, and the fan 4 is used to stir the liquid cooling medium 3. The stirred liquid cooling medium 3 can be pushed to all directions in the box body 1, and can dissipate heat from all surfaces of the battery module 2. The liquid cooling medium 3 removes the heat from the battery module 2 by contacting the battery module 2, and then is stirred by the fan 4 to make the liquid cooling medium 3 with the heat of the battery module 2 contact the box 1. The liquid cooling medium 3 transfers the heat brought out of the battery module 2 to the box 1, and then exchanges heat with the outside through the box 1. Compared with the heat exchange between the liquid cooling plate and the bottom surface of the battery in the prior art, the heat dissipation method of the battery module 2 entering the liquid cooling medium 3 has a better heat dissipation effect, which can avoid the temperature of a certain part of the battery module 2 being too high due to uneven heat dissipation, thereby causing the battery module 2 to explode.

[0039] Optionally, the number of battery modules 2 is set to at least two to avoid wasting the storage space of the housing 1. For example, the number of battery modules 2 can be set to 2, 3, or 4. In this embodiment, the number of battery modules 2 is set to two. If too many battery modules 2 are arranged in the housing 1, the spacing between the battery modules 2 will become smaller, and the volume of liquid cooling medium 3 flowing into the battery modules 2 will become smaller, which will affect the heat dissipation function of the liquid cooling medium 3.

[0040] Optionally, the number of fans 4 is set to at least 1, and the fans 4 can stir the liquid cooling medium 3, thereby improving the cooling efficiency of the liquid cooling medium 3. For example, the number of fans 4 can be set to 1, 2 or 3. If the number of fans 4 is set too small, such as only one fan 4 is set in the housing 1, such a setting will result in insufficient power transmitted to the liquid cooling medium 3, and the heat dissipation efficiency of the liquid cooling medium 3 will also be reduced; if the number of fans 4 is set too much, such as 10 fans 4 are set in the housing 1, such a setting will result in redundant fans 4, and there is no need for too many fans 4 in the housing 1 to stir the liquid cooling medium 3, and too many fans 4 in the housing 1 will also take up a lot of volume, resulting in other components being unable to be placed in the housing 1. In this embodiment, the number of fans 4 is set to two, and the two fans 4 are stacked up and down, which not only saves the occupied area of ​​the bottom surface of the housing 1, but also can stir the liquid cooling medium 3 at a higher height, thereby improving the heat dissipation efficiency of the liquid cooling medium 3, and can also perform multi-faceted heat dissipation on the battery module 2 with a higher height.

[0041] Alternatively, as Figure 1-4 As shown, in this embodiment, the fan 4 is disposed between the two battery modules 2. Since the fan 4 is disposed between the two battery modules 2, the liquid cooling medium 3 stirred by the fan 4 can dissipate heat from the surfaces of the two battery modules 2 corresponding to the fan 4, and dissipate heat from both battery modules 2 simultaneously. The above arrangement can improve the heat dissipation efficiency of the liquid cooling medium 3 and can dissipate heat from multiple battery modules 2 simultaneously. In other embodiments, the fan 4 can be disposed at a corner of the bottom surface of the housing 1. As long as the fan 4 is placed inside the housing 1 and can stir the liquid cooling medium 3, it can be sufficient.

[0042] Alternatively, as Figure 1-4 As shown, in this embodiment, the fan 4 is fixedly connected to the bottom of the inner side of the housing 1, so that the position of the fan 4 is fixed, and the fan 4 is prevented from being driven by the flowing liquid cooling medium 3 during operation and moving irregularly within the housing 1. This prevents the fan 4 from colliding with components such as the battery module 2 located within the housing 1, which may cause damage to the fan 4 or the components within the housing 1 and thus affect the normal operation of the battery box. In other embodiments, the fan 4 and the housing 1 can be detachably connected or have a sliding connection with avoidance, as long as the fan 4 does not collide with other components.

[0043] Specifically, in this embodiment, the liquid level of the liquid cooling medium 3 in the housing 1 is equal to or higher than the top surface height of the battery module 2, so that the battery module 2 is completely immersed in the liquid cooling medium 3 in the housing 1. The liquid cooling medium 3 completely immerses the battery module 2, so that the entire peripheral surface of the battery module 2 is in contact with the liquid cooling medium 3. When the fan 4 stirs the liquid cooling medium 3 to dissipate heat from the battery module 2, the liquid cooling medium 3 can dissipate heat from the entire peripheral surface of the battery module 2, thereby improving the heat dissipation efficiency of the liquid cooling medium 3. Moreover, because the liquid cooling medium 3 can dissipate heat from the entire peripheral surface of the battery module 2, it can also avoid the situation where the cooling system can only dissipate heat locally, thereby avoiding the situation where overall heat dissipation must be achieved through heat conduction within the battery cell.

[0044] Optionally, the liquid cooling medium 3 is made of an insulating material, and the insulating materials have a high resistivity, which means that they will not conduct electricity at an allowable voltage, so that the liquid cooling medium 3 made of insulating material is placed in the housing 1 to avoid internal short circuits in the housing 1 and thermal runaway. Exemplarily, the material of the liquid cooling medium 3 can be cooling oil or coolant, etc. In this embodiment, the liquid cooling medium 3 is made of cooling oil. Cooling oil does not conduct electricity at an allowable voltage, and the biggest feature of cooling oil is that it does not contain water. Therefore, its thermal balance ability is more sensitive and its heat conduction ability is better, which can more effectively keep the battery module 2 at the optimal operating temperature. In addition, the cooling oil is less corrosive to the components in the housing 1 and has better lubrication properties.

[0045] Specifically, if Figure 1-3 As shown, in this embodiment, a bracket is provided inside the box 1, and the battery module 2 is placed on the bracket, so that the battery module 2 can be suspended in the box. The battery module 2 is suspended, so that the liquid cooling medium 3 can flow through the bottom of the battery module 2, and then heat exchange is performed on the bottom of the battery module 2, so as to prevent the battery module 2 from having a local temperature that is too high due to local uneven heat dissipation, thereby preventing the battery module 2 from exploding.

[0046] It should be noted here that the bracket is an existing structure, and setting a bracket in the battery box is a conventional setting in this field. In this embodiment, any bracket in the existing technology can be used, and the battery module 2 can be placed on the bracket by any method in the existing technology, and the bracket can be set in the box body 1 by any method in the existing technology. As long as the battery module 2 is suspended in the box body 1, no further detailed introduction will be given.

[0047] Optionally, the housing 1 is made of a metal material, which has excellent thermal conductivity, enabling better heat exchange between the liquid cooling medium 3 contacting the inner wall of the housing 1 and the outside of the housing 1. For example, the housing 1 can be made of graphene or stainless steel. In this embodiment, the housing 1 is made of stainless steel, which not only offers a good cost-effectiveness, but also has low thermal conductivity, mature welding processes, and excellent post-weld performance.

[0048] To prevent electrolyte leakage within the battery box, protect the battery modules 2 from external environmental influences, and maintain pressure balance within the box 1, the battery box must be well sealed during operation. Specifically, in this embodiment, the box 1 is formed by fully welding the panels together. This fully welded box 1 provides excellent sealing, preventing electrolyte leakage, protecting the battery modules 2 from external environmental influences, and maintaining pressure balance within the box 1, thereby ensuring the normal operation of the battery box.

[0049] Optionally, in this embodiment, if Figure 1-4 As shown, the box body 1 includes a main body 11 and a box cover 12 connected to each other, with a sealing device provided between the main body 11 and the box cover 12. The separate design of the main body 11 and the box cover 12 can more conveniently install components into the box body 1. The sealing device provided between the main body 11 and the box cover 12 ensures that the box body 1 has good sealing performance to prevent leakage of electrolyte in the battery box. In other embodiments, the box body 1 may not be configured as a separate body, as long as it can facilitate the installation of components into the box body 1 without compromising the overall sealing performance of the box body 1. No further details will be given.

[0050] The battery management system 6 (BMS) is commonly known as a battery nanny or battery steward. It is mainly used to intelligently manage and maintain each battery unit, monitor the battery status, and prevent the battery from overcharging and over-discharging to extend the battery life. Specifically, in this embodiment, Figure 1-3 As shown, the battery box also includes a battery management system 6, which is arranged in the box body 1. The battery management system 6 is electrically connected to the battery module 2, so that the battery management system 6 can obtain the status of the battery module 2 to ensure the normal operation of the battery module 2 and extend the service life of the battery module 2 and the battery box.

[0051] It should be noted here that the battery management system 6 is an existing structure. Setting up the battery management system 6 in the battery box is a conventional setting in this field. In this embodiment, any battery management system 6 in the existing technology can be adopted and connected to the battery module 2 using any connection method in the existing technology. As long as the battery management system 6 realizes the monitoring function of the battery module, it will not be introduced in detail.

[0052] Specifically. Figure 1-3 As shown, a communication port 7 is provided on the box 1, one end of the communication port 7 is electrically connected to the battery management system 6, and the other end is electrically connected to an external receiving mechanism, so as to transmit the signal received by the battery management system 6 to the outside world. The above setting can more intuitively monitor the status of the battery module 2, and promptly handle errors when they occur, thereby extending the service life of the battery module 2 and the battery box.

[0053] Specifically, if Figure 1-3 As shown, in this embodiment, a high-voltage socket 8 is provided on the box body 1, and the high-voltage socket 8 includes a positive socket 81 and a negative socket 82. The positive socket 81 is connected to the positive pole of the battery module 2, and the negative socket 82 is connected to the negative pole of the battery module 2. The positive socket 81 and the negative socket 82 are respectively electrically connected to the mechanism to be powered, and supply power to the mechanism to be powered so that the mechanism to be powered can work normally.

[0054] It should be noted here that the high-voltage socket 8 is an existing structure. Setting a high-voltage socket 8 in the battery box is a conventional setting in this field. In this embodiment, any high-voltage socket 8 in the existing technology can be used and connected to the battery module 2 using any connection method in the existing technology. As long as the battery module 2 can be powered by the high-voltage socket 8 to be supplied to the power supply mechanism, no further detailed introduction will be given.

[0055] The fuse 9 can directly melt when the inflow current is too large, thereby cutting off the circuit and protecting the safety of the undamaged components. Figure 1-2As shown, in this embodiment, a fuse 9 is further provided inside the box 1. One end of the fuse 9 is electrically connected to the negative pole socket 82, and the other end is electrically connected to the negative pole of the battery module 2. Therefore, when a fault occurs in the battery module 2 or the mechanism to be powered, an excessive current will flow into the fuse 9 and the fuse will be blown to protect the safety of other mechanisms in the circuit.

[0056] It should be noted here that the fuse 9 is an existing structure. Setting the fuse 9 in the battery box is a conventional setting in this field. In this embodiment, any type of fuse 9 in the existing technology can be used, and any connection method in the existing technology can be used to electrically connect the battery module 2 and the negative pole socket 82. As long as the fuse 9 can realize the protection function of the entire circuit, it will not be introduced in detail.

[0057] Specifically, if Figure 1-2 As shown, in this embodiment, a connecting component 5 is provided inside the box body, and the connecting component 5 includes a first connecting member, a second connecting member and a third connecting member, and at least two battery modules 2 are provided. The second connecting member is electrically connected to at least two battery modules 2, and is used to connect at least two of the battery modules in series or in parallel to form a battery module group. The battery module group is connected into a closed loop to supply power to the detection mechanism. Since the battery module group is formed by at least two battery modules 2 connected in series or in parallel, battery modules 2 of the same specification and quantity can output different voltages to supply power to the power supply mechanism. One end of the first connecting member is electrically connected to the positive socket 81, and the other end is connected to the battery module group. One end of the third connecting member is electrically connected to the negative socket 82, and the other end is electrically connected to the battery module group, so that they form a closed loop, so that the battery module group supplies power to the power supply mechanism.

[0058] Optionally, the connecting component 5 can be a hard copper busbar, graphene or conductive carbon black, etc. In this embodiment, the connecting component 5 is a hard copper busbar, which can be insulated by means of heat shrink tubing or in-mold injection molding and dipping to ensure electrical safety. The hard copper busbar is suitable for various electrical equipment and distribution devices. The hard copper busbar has good electrical conductivity, is suitable for high current transmission, can withstand a large current load, and is suitable for various electrical equipment and electronic products, making the hard copper busbar more suitable for use in battery boxes equipped with cooling oil.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery box, characterized in that: include: A box (1), wherein the box (1) contains a liquid cooling medium (3), and the liquid cooling medium (3) is used to dissipate heat from components in the box (1); A battery module (2), the battery module (2) being placed in the box (1), and the battery module (2) being immersed in the liquid cooling medium (3); A fan (4), the fan (4) is placed in the box (1), the fan (4) is immersed in the liquid cooling medium (3), and the fan (4) is used to stir the liquid cooling medium (3).

2. The battery box according to claim 1, characterized in that: The number of the battery modules (2) is set to at least two, the number of the fans (4) is set to at least one, and the fan (4) is provided between at least two of the battery modules (2); And / or, the fan (4) is fixedly connected to the bottom of the inner side of the box (1).

3. The battery box according to claim 1, characterized in that: The liquid level of the liquid cooling medium (3) in the box (1) is equal to or higher than the top surface height of the battery module (2).

4. The battery box according to claim 1, characterized in that: A bracket is provided inside the box (1), and the battery module (2) is placed on the bracket, which is used to suspend the battery module (2) in the box (1).

5. The battery box according to any one of claims 1 to 4, characterized in that: The box body (1) is made of metal material.

6. The battery box according to any one of claims 1 to 4, characterized in that: The box body (1) is formed by connecting plates through full welding; And / or, the box body (1) comprises a main body and a box cover (12) connected to each other, and a sealing device is provided between the main body and the box cover (12).

7. The battery box according to any one of claims 1 to 4, characterized in that: The battery box further comprises a battery management system (6), which is arranged in the box body (1) and is electrically connected to the battery module (2) for monitoring the status of the battery module (2).

8. The battery box according to claim 7, characterized in that: The box (1) is provided with a communication port (7), which is electrically connected to the battery management system (6) and is used to transmit signals received by the battery management system (6) to the outside world.

9. The battery box according to any one of claims 1 to 4, characterized in that: A high-voltage socket (8) is provided on the box (1), and the high-voltage socket (8) comprises a positive socket (81) and a negative socket (82). The positive socket (81) is connected to the positive pole of the battery module (2), and the negative socket (82) is connected to the negative pole of the battery module (2). The high-voltage socket (8) is used to supply power to the outside world.

10. The battery box according to claim 9, characterized in that: A connecting assembly (5) is provided inside the box (1), the connecting assembly (5) comprising a first connecting member, a second connecting member and a third connecting member, and the battery module (2) is provided with at least two of them; The second connecting member is electrically connected to at least two of the battery modules (2) and is used to connect the at least two battery modules (2) in series or in parallel to form a battery module group; One end of the first connector is electrically connected to the positive electrode socket (81), and the other end is electrically connected to the battery module group; One end of the third connector is electrically connected to the negative electrode socket (82), and the other end is electrically connected to the battery module group.

Images