Battery module and immersed liquid cooling plug-in box

Abstract

The utility model provides a battery module and immersion type liquid cooling subrack, battery module includes bottom plate, upper plate and perpendicular to bottom plate and upper plate two end plate, the two end plate is respectively close to the both ends of bottom plate arrangement, the upper end and lower end of two end plate are respectively with upper plate and bottom plate detachable connection, the bottom plate is equipped with the bottom plate, the bottom plate is equipped with the bottom plate, the bottom plate is equipped with the bottom plate, the bottom plate is equipped with the bottom plate, the bottom plate is equipped with the bottom plate, and the bottom plate is equipped with the bottom plate. A plurality of battery cells are clamped between the two end plates, an insulating plate is arranged between every two adjacent battery cells, a flow channel is formed in each insulating plate, the flow channels penetrate through the insulating plates in the direction parallel to the end plates, and the bottoms and the tops of the battery cells abut against the bottom plate and the upper plate in a sealed mode respectively. The bottom and the top of the insulating plate abut against the bottom plate and the upper plate in a sealed mode respectively. According to the utility model, the cooling effect on the battery cell can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling, in particular to a battery module and an immersion-type liquid-cooling plug-in box. Background Art

[0002] Currently, battery modules in battery plug-ins are typically secured by clamping end plates and tightening with steel straps or tie bands. This results in uneven force on the center cell and the cells at the ends, causing different pressures and affecting the consistency of the cells over long-term use. When the module is hoisted for installation, the center cell sinks under the influence of gravity, causing the module to deform.

[0003] A Chinese utility model patent, granted with publication number CN220106760U, discloses a module frame, battery module, and power battery pack. The module frame includes end plates, liquid-cooled side plates, and a heater. The module frame secures the battery cells in place using the two end plates, two liquid-cooled side plates, and a heater at the bottom. However, heat dissipation from the battery cells is limited to the two liquid-cooled side plates, resulting in poor cooling. Utility Model Content

[0004] The purpose of the present invention is to address the defects of the prior art and provide a battery module and an immersion liquid cooling plug-in box, which can improve the cooling effect of the battery core.

[0005] In order to solve the above technical problems, the utility model provides a battery module, comprising a bottom plate, an upper plate and two end plates perpendicular to the bottom plate and the upper plate, the two end plates are respectively arranged close to the two ends of the bottom plate, the upper ends and lower ends of the two end plates are respectively detachably connected to the upper plate and the bottom plate, a plurality of battery cells are clamped between the two end plates, an insulating plate is arranged between two adjacent battery cells, a flow channel is arranged in the insulating plate, the flow channel passes through the insulating plate in a direction parallel to the end plates, the bottom and top of the battery cells are respectively sealed against the bottom plate and the upper plate, and the bottom and top of the insulating plate are respectively sealed against the bottom plate and the upper plate.

[0006] Furthermore, flanges are provided at the upper and lower ends of the end plates, the flanges are parallel to the bottom plate, and the end plates are connected to the upper plate and the bottom plate via the flanges.

[0007] Furthermore, a plurality of studs are fixedly provided on the upper surface of the bottom plate and the lower surface of the upper plate, and connection holes corresponding to the studs are provided on the flange, and the flange is detachably connected to the upper plate and the bottom plate through the connection holes.

[0008] Furthermore, the flow channel is wavy or broken line shaped.

[0009] In the second aspect, the utility model provides an immersion liquid-cooled plug-in box, comprising a box body and a box cover, a sealing plate is arranged in the box body, the edge of the sealing plate is sealed and fixedly connected to the inner wall of the box body, the sealing plate divides the box body into an electrical compartment and a cooling compartment, the electrical compartment and the cooling compartment are respectively located above and below the sealing plate, coolant is arranged in the cooling compartment, the battery module is arranged in the cooling compartment, a plurality of windows are opened on the sealing plate, so that the battery module can be inserted from the window and the upper plate is placed on the upper surface of the sealing plate, the upper plate is sealedly connected to the sealing plate, a first opening is opened on the upper plate, a negative terminal and a positive terminal are arranged in the electrical compartment, and the connecting copper bus of the battery module is connected to the negative terminal and the positive terminal through the first opening.

[0010] Furthermore, a second opening is provided on the end plate.

[0011] Furthermore, there is a gap between the bottom of the battery module and the bottom of the box.

[0012] Furthermore, a sealing gasket is provided between the upper plate and the sealing plate.

[0013] Furthermore, a sealant is provided between the upper plate and the sealing plate, and the sealant is arranged along the edge of the upper plate.

[0014] Furthermore, a partition is provided between two adjacent battery modules, the bottom of the partition is connected to the bottom of the box, the top of the partition is connected to the sealing plate, and a liquid guide hole is provided on the partition.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model adopts an insulating plate with a flow channel. When the battery module is immersed in coolant, the coolant can flow through the insulating plate and over the large surface of the battery cell, which is beneficial to the heat dissipation of the battery cell;

[0017] 2. This utility model uses two end plates, a top plate, and a bottom plate to clamp the four sides of the battery cell, forming a steel body for the battery module. This balances the forces on the battery cells. When the battery module is lifted, the support of the bottom plate prevents the middle cell from sinking and the module from deforming, facilitating rapid loading and unloading. Furthermore, the other two sides of the battery cell can directly contact the coolant, further enhancing the cooling effect of the coolant.

[0018] 3. The flow channel of the insulating plate of the present invention is wavy or broken line shaped, which can indirectly increase the contact area between the coolant and the battery core and improve the cooling effect.

[0019] 4. This utility model provides a sealing plate within the housing, separating the housing into an electrical compartment and a cooling compartment. The battery modules are directly exposed to coolant in the cooling compartment, resulting in effective and efficient heat dissipation and rapid cell cooling, which helps extend the life of the cells. By sealing the sealing plate to the upper plate of the battery module, the cooling compartment forms a sealed space, preventing interference with the electrical compartment.

[0020] 5. The end plate of the present invention is provided with a second opening, so that one surface of the battery cells at both ends of the battery module can also be in direct contact with the coolant.

[0021] 6. There is a gap between the bottom of the battery module of the present invention and the bottom of the box, that is, the battery module is hoisted in the box through the sealing plate, which further increases the contact area between the battery module and the coolant.

[0022] 7. The sealing plate of the utility model and the upper plate of the battery module are sealed by two layers of sealing gasket and sealant, which ensures the sealing of the cooling chamber and is not easy to leak.

[0023] 8. The utility model provides a partition between two adjacent battery modules, and a liquid guide hole is provided on the partition, thereby improving the strength and rigidity of the box without affecting the flow of coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the main view of the battery module of the utility model;

[0025] Figure 2 This is a top view of the battery module of the present invention;

[0026] Figure 3 This is the main view of the upper plate of the utility model;

[0027] Figure 4 This is a top view of the upper plate of the utility model;

[0028] Figure 5 This is the front view of the end plate of the utility model;

[0029] Figure 6 It is a side view of the end plate of the utility model;

[0030] Figure 7 This is a schematic structural diagram of the insulation board of the utility model;

[0031] Figure 8 This is the main view of the bottom plate of the utility model;

[0032] Figure 9 This is the front view of the battery box of the utility model;

[0033] Figure 10 This is a top view of the battery box of the utility model;

[0034] Figure 11 This is a schematic structural diagram of the sealing plate of the utility model;

[0035] Figure 12 This is a schematic diagram of the partition structure of the utility model;

[0036] Figure 13 This is a structural diagram of the immersion liquid cooling plug-in box of the utility model.

[0037] Reference numerals: 1-battery module; 11-bottom plate; 12-upper plate; 121-first opening; 122-fixing hole; 13-end plate; 131-flange; 132-second opening; 14-insulating plate; 141-flow channel; 15-stud; 16-nut; 17-battery cell;

[0038] 2-battery box; 21-box body; 22-box cover; 23-sealing plate; 231-window; 232-hanging hole; 24-partition; 241-liquid guide hole; 25-negative terminal; 26-positive terminal; 27-liquid inlet; 28-liquid outlet. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0040] This embodiment provides an immersion liquid-cooled plug-in box, including a battery box 2 and a plurality of battery modules 1 arranged in the battery box 2 .

[0041] like Figure 1 、 2 As shown, the battery module 1 includes a bottom plate 11, an upper plate 12 and two end plates 13 perpendicular to the bottom plate 11 and the upper plate 12. The two end plates 13 are respectively arranged near the two ends of the bottom plate 11. A plurality of battery cells 17 are clamped between the two end plates 13. An insulating plate 14 is arranged between two adjacent battery cells 17. The bottom and top of the battery cell 17 are respectively sealed against the bottom plate 11 and the upper plate 12. The bottom and top of the insulating plate 14 are respectively sealed against the bottom plate 11 and the upper plate 12.

[0042] like Figure 3 、 4 As shown, the upper plate 12 is rectangular, and has a first opening 121 and multiple fixing holes 122. The first opening 121 is located in the middle of the upper plate 12, and multiple fixing holes 122 are arranged in a circle around the first opening 121. Four studs 15 are welded to the lower surface of the upper plate 12.

[0043] like Figure 8As shown, four studs 15 are welded to the upper surface of the bottom plate 11. The bottom plate 11 is also rectangular, and its length and width are smaller than the upper plate 12.

[0044] like Figure 5 、 6 As shown, flanges 131 are integrally formed at the upper and lower ends of the end plate 13. Connection holes are defined in the flanges 131. By inserting studs 15 of the upper and lower plates 12 and 11 into the connection holes and using nuts 16, the end plate 13 can be removably fixedly connected to the upper and lower plates 12 and 11. A second opening 132 is defined in the middle of the end plate 13.

[0045] like Figure 7 As shown, a flow channel 141 is provided in the insulating plate 14, and the flow channel 141 penetrates the insulating plate 14 in a direction parallel to the end plate 13, so that the external coolant can enter the flow channel 141 of the insulating plate 14 to cool the large surface of the battery cell 17. The coolant uses an insulating coolant. The cross-section of the flow channel 141 can be straight, wavy, or broken line or any other form. In this embodiment, the cross-section of the flow channel 141 can be wavy, which is beneficial to improve the cooling effect. The width of the flow channel 141 should be as wide as possible, which can increase the flow rate of the coolant in the flow channel and reduce the distance between the coolant and the battery cell, thereby further improving the cooling effect.

[0046] like Figure 9 As shown, the battery box 2 includes a box body 21 and a box cover 22 . The box body 21 is cylindrical. The box cover 22 is sealed and fixed to the top of the box body 21 . A sealing plate 23 and a partition plate 24 are fixedly arranged in the box body 21 .

[0047] like Figure 10 As shown, the edge of the sealing plate 23 is fixedly connected to the inner wall of the box body 21 by welding and sealing. The sealing plate 23 divides the box body 21 into an electrical compartment and a cooling compartment. The electrical compartment and the cooling compartment are respectively located above and below the sealing plate 23. Coolant is set in the cooling compartment. A liquid inlet hole 27 and a liquid outlet hole 28 are provided on the side wall of the box body 21 corresponding to the cooling compartment. A negative terminal 25, a positive terminal 26, an MSD, a communication terminal, etc. are provided in the electrical compartment.

[0048] like Figure 11 As shown, a plurality of windows 231 and a plurality of circles of hanging holes 232 are provided on the sealing plate 23, and each circle of hanging holes 232 is arranged around a window 231. The arrangement position of the hanging holes 232 corresponds to the fixing holes 122 of the upper plate 12 of the battery module 1. The length and width of the window 231 are both larger than the bottom plate 11 of the battery module 1 and smaller than the bottom plate 11 and the upper plate 12 of the battery module 1, so that the battery module 1 can be inserted into the cooling chamber through the window 231 and the upper plate 12 can be placed on the upper surface of the sealing plate 23. At this time, the hanging holes 232 of the sealing plate 23 are aligned with the fixing holes 122 of the upper plate 12, and can be fixed by bolts, etc. Figure 13 shown.

[0049] In addition, in this embodiment, there is a gap between the bottom of the battery module 1 and the bottom of the box 21, that is, the battery module 1 is suspended in the box 21 through the sealing plate 23 and does not contact the bottom of the box 21, which can further increase the contact area between the battery module 1 and the coolant.

[0050] To prevent leakage, this embodiment installs a sealing gasket and sealant between the sealing plate 23 and the upper plate 12. The sealant is applied to the edge of the upper plate 12. Specifically, a sealing gasket is pre-bonded to the upper surface of the sealing plate 23. The battery module 1 is then inserted into the cooling chamber through the window 231. After the upper plate 12 and the sealing plate 23 are secured with bolts, a circle of sealant is applied to the edge of the upper plate 12. Once the battery module 1 is secured, the connecting copper busbar of the battery module 1 can be connected to the negative terminal 25 and the positive terminal 26. The connecting copper busbar is disconnected by the MSD to ensure safety. The temperature probe, data acquisition cable, etc. are first connected to the BMU, and then to the communication terminals through the BMU.

[0051] like Figure 9 As shown, the upper and lower ends of the partition 24 are welded to the lower surface of the sealing plate 23 and the bottom of the box body 21, respectively. Figure 12 As shown, a plurality of liquid guide holes 241 are provided on the partition plate 24, thereby improving the strength and rigidity of the box body 21 without affecting the flow of the coolant.

[0052] The installation method of the immersion liquid cooling plug-in box is as follows: first assemble the battery module 1, add the insulating coolant into the cooling chamber in advance, stick the sealing gasket on the upper surface of the sealing plate 23, and then hoist the battery module 1. Because it is supported by the bottom plate 11, the battery cell 17 in the middle of the battery module 1 will not sink during the hoisting process; align the battery module 1 with the window 231 of the sealing plate 23 and drop it so that the upper plate 12 is placed on the upper surface of the sealing plate 23, and the hanging hole 232 of the sealing plate 23 is aligned with the fixing hole 122 of the upper plate 12, use bolts to fix the upper plate 12 on the sealing plate 23, and then apply a circle of sealant on the edge of the upper plate 12 to complete the fixation of the battery module 1, then connect the battery module 1 to the negative terminal 25, the positive terminal 26, the communication terminal, etc., cover the box cover 22, and the assembly of the immersion liquid cooling plug-in box is completed.

[0053] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A battery module, characterized in that: The invention comprises a bottom plate (11), an upper plate (12), and two end plates (13) perpendicular to the bottom plate (11) and the upper plate (12). The two end plates (13) are respectively arranged near the two ends of the bottom plate (11). The upper ends and lower ends of the two end plates (13) are respectively detachably connected to the upper plate (12) and the bottom plate (11). A plurality of battery cells (17) are sandwiched between the two end plates (13). An insulating plate (14) is arranged between two adjacent battery cells (17). A flow channel (141) is arranged in the insulating plate (14). The flow channel (141) passes through the insulating plate (14) in a direction parallel to the end plates (13). The bottom and top of the battery cell (17) are respectively sealed against the bottom plate (11) and the upper plate (12). The bottom and top of the insulating plate (14) are respectively sealed against the bottom plate (11) and the upper plate (12).

2. The battery module according to claim 1, wherein: The upper and lower ends of the end plate (13) are both provided with flanges (131), the flanges (131) are parallel to the bottom plate (11), and the end plate (13) is connected to the upper plate (12) and the bottom plate (11) via the flanges (131).

3. The battery module according to claim 2, wherein: A plurality of studs (15) are fixedly provided on the upper surface of the bottom plate (11) and the lower surface of the upper plate (12); connection holes corresponding to the studs (15) are provided on the flange (131); and the flange (131) is detachably connected to the upper plate (12) and the bottom plate (11) through the connection holes.

4. The battery module according to any one of claims 1 to 3, characterized in that: The flow channel (141) is in a wave shape or a broken line shape.

5. An immersion liquid cooling plug-in box for a battery module according to any one of claims 1 to 4, characterized in that: The invention comprises a box body (21) and a box cover (22), wherein a sealing plate (23) is provided in the box body (21), the edge of the sealing plate (23) is sealed and fixedly connected to the inner wall of the box body (21), the sealing plate (23) divides the box body (21) into an electrical compartment and a cooling compartment, the electrical compartment and the cooling compartment are respectively located above and below the sealing plate (23), a coolant is provided in the cooling compartment, the battery module (1) is provided in the cooling compartment, and a plurality of windows are provided on the sealing plate (23) (231), so that the battery module (1) can be inserted from the window (231) and the upper plate (12) is placed on the upper surface of the sealing plate (23), the upper plate (12) is sealed and connected to the sealing plate (23), a first opening (121) is opened on the upper plate (12), a negative terminal (25) and a positive terminal (26) are set in the electrical compartment, and the connecting copper busbar of the battery module (1) is connected to the negative terminal (25) and the positive terminal (26) through the first opening (121).

6. The immersion liquid cooling plug-in box according to claim 5, characterized in that: A second opening (132) is provided on the end plate (13).

7. The immersion liquid cooling plug-in box according to claim 5, characterized in that: There is a gap between the bottom of the battery module (1) and the bottom of the box (21).

8. The immersion liquid cooling plug-in box according to claim 5, characterized in that: A sealing gasket is provided between the upper plate (12) and the sealing plate (23).

9. The immersion liquid cooling plug-in box according to claim 5, characterized in that: A sealant is provided between the upper plate (12) and the sealing plate (23), and the sealant is arranged along the edge of the upper plate (12).

10. The immersion liquid cooling plug-in box according to claim 5, characterized in that: A partition (24) is provided between two adjacent battery modules (1), the bottom of the partition (24) is connected to the bottom of the box (21), the top of the partition (24) is connected to the sealing plate (23), and a liquid guide hole (241) is provided on the partition (24).

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