Immersed cooling battery module and battery pack

Abstract

The utility model provides an immersed cooling battery module and a battery pack, the structure of the immersed cooling battery module comprises a module box body, the module box body is provided with an output interface, and the module box body is provided with a water inlet pipe interface and a water outlet pipe interface which are used for circulating a cooling medium; the output interface is arranged in the module box body, the battery cell module is arranged in the module box body in a sealing manner, the output interface is conductively connected with the battery cell module, the battery cell module is provided with an output electrode conductive block, and the output electrode conductive block extends out of the module box body. According to the immersed cooling battery module and the battery pack, the problems that the weight of the battery module is large and the space utilization rate of the battery pack is low due to the fact that an existing immersed cooling battery module is provided with a switching sealing connector can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery cooling, and in particular to an immersion cooling battery module and a battery pack. Background Art

[0002] With the continuous improvement of new energy vehicle technology and the continuous increase of electric drive power and charging power, better heat dissipation solutions are also required for the power batteries of vehicles.

[0003] Currently, the heat dissipation solutions for battery packs are mainly divided into air cooling, liquid cooling, and direct cooling. Among them, air cooling is to set up an air duct between the vehicle and the battery pack, and the battery pack is cooled by the blower of the vehicle. Liquid cooling and direct cooling are to install a water cooling plate at the bottom or side of the module, and the cooling medium is filled inside the water cooling plate through the vehicle's cooling system or the air conditioning compressor system, and then the battery cells are cooled. The above cooling methods have good cooling effects when the battery pack outputs at a low power continuously, but when the battery pack outputs at a high power for a short time, they cannot quickly cool the module battery cells. If the temperature of the battery cells is too high, thermal runaway may occur. In addition, the weight of the water cooling plate is also relatively large, which greatly occupies the internal space of the battery pack and reduces the energy density of the battery pack.

[0004] Therefore, an immersion cooling solution is proposed, that is, the inside of the battery module is completely filled with a cooling medium. However, adopting the immersion cooling solution requires sealing the battery module, especially at the high-voltage and low-voltage output points of the battery module, a transfer sealing connector needs to be set. Such a setting will increase the volume inside the battery module, increase the usage amount of the cooling medium, increase the weight of the battery module, and further reduce the space utilization rate of the battery pack. Summary of the Utility Model

[0005] In view of this, the purpose of the present application is to provide an immersion cooling battery module and a battery pack to solve the problems that the existing immersion cooling battery module has a relatively large weight and a low space utilization rate of the battery pack due to the setting of a transfer sealing connector.

[0006] According to the first aspect of the present utility model, an immersion cooling battery module is provided, wherein the immersion cooling battery module includes: a module box body provided with an output interface, and the module box body is provided with a water inlet interface and a water outlet interface for circulating a cooling medium; and a battery cell module hermetically arranged in the module box body, the output interface is electrically connected to the battery cell module, and the battery cell module is provided with an output pole conductive block that extends out of the module box body.

[0007] Preferably, the module box body includes: a module bracket formed in a U shape, with the battery cell module installed inside the module bracket; a module upper cover installed at the end of the module bracket; and module side plates arranged on opposite sides of the module bracket; the module bracket, the module upper cover, and the module side plates surround the outer periphery of the battery cell module.

[0008] Preferably, the battery cell module includes: a plurality of battery cells with a cylindrical shape, and the plurality of battery cells are arranged in an array; a battery cell support plate installed at both ends of the battery cells, the battery cell support plate is connected to the module box body, and a plurality of openings are formed on the battery cell support plate, and the positions of the plurality of openings correspond to the positions of the electrodes of the plurality of battery cells; an inter-cell busbar installed in the middle of the battery cell support plate, the inter-cell busbar is electrically connected to the plurality of battery cells through the openings, and is used to realize the series and parallel connection between the battery cells; an output pole busbar installed at both ends of the battery cell support plate, the output pole busbar is electrically connected to the plurality of battery cells through the openings, and is used to transmit the current of the battery cell module, and the output pole conductive block is arranged on the output pole busbar; and a sampling assembly electrically connected to the inter-cell busbar and the output pole busbar, and is used to collect the voltage and temperature of the battery cell module, and the output interface is electrically connected to the sampling assembly.

[0009] Preferably, the battery cell support plate includes: a support plate main body formed with a plurality of openings, and the diameter of the openings is smaller than the diameter of the battery cells; and a plurality of clamping members connected to the support plate main body, and the plurality of clamping members are arranged around the outer periphery of the openings, and the ends of the battery cells can be clamped with the plurality of clamping members.

[0010] Preferably, the inter-cell busbar includes: a first busbar main body arranged between adjacent openings, and a bent portion is formed at the end of the first busbar main body, and the bent portion is connected to the sampling assembly; and a plurality of first conductive modules arranged at intervals along the extension direction of the first busbar main body, and the plurality of first conductive modules are electrically connected to the electrodes of the plurality of battery cells through the openings, and the first conductive modules are electrically connected to the first busbar main body.

[0011] Preferably, the output pole busbar includes: a second busbar main body arranged at the end of the battery cell support plate, and the output pole conductive block is arranged at the end of the second busbar main body; and a plurality of second conductive modules arranged at intervals along the length direction of the second busbar main body, and the plurality of second conductive modules are electrically connected to the electrodes of the plurality of battery cells through the openings, and the second conductive modules are electrically connected to the second busbar main body.

[0012] Preferably, the sampling assembly includes: a sampling assembly main body with a circuit for signal transmission arranged inside; a plurality of voltage sampling modules arranged on the sampling assembly main body, and the plurality of voltage sampling modules are respectively connected to the bent portion and the second busbar main body; a connector arranged on the sampling assembly main body, and the connector is connected to the output interface; and a temperature acquisition module, with the first end of the temperature acquisition module electrically connected to the sampling assembly main body and the second end of the temperature acquisition module adhered to the position to be measured for temperature.

[0013] Preferably, an annular groove is formed at the bottom of the output pole conductive block, a sealing ring is arranged in the annular groove, an output pole hole is formed at the position of the module upper cover corresponding to the output pole conductive block, the output pole conductive block extends out of the output pole hole, and the diameter of the sealing ring is larger than the diameter of the output pole hole.

[0014] Preferably, the output interface and the water outlet interface are arranged on the module upper cover, the water inlet interface is arranged on the module bracket, the water outlet interface and the water inlet interface are located at the diagonal corners of the module box body, and a module fixing block is arranged on the module bracket for connecting with the lower shell of the battery pack.

[0015] According to a second aspect of the present invention, a battery pack is provided, wherein the battery pack includes the immersion cooling battery module as described above.

[0016] In the immersion cooling battery module and the battery pack of the embodiment of the present invention, the battery cell module is hermetically arranged in the module box body. The module box body is provided with a water inlet interface and a water outlet interface for circulating the cooling medium, so that the battery cell module can be cooled by immersion. In addition, the module box body is provided with an output interface, and the output interface is electrically connected to the battery cell module for signal transmission. The battery cell module is further provided with an output pole conductive block, and the output pole conductive block extends out of the module box body for current transmission. In this way, the transfer sealing connector can be omitted, further reducing the volume of the battery module, reducing the usage amount of the cooling medium, and improving the energy density of the battery pack, thereby effectively solving the problems that the existing immersion cooling battery module has a large weight and low space utilization rate of the battery pack due to the arrangement of the transfer sealing connector.

[0017] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings and are described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of an immersion cooling battery module according to the present utility model.

[0020] Figure 2 It is a schematic diagram of a battery cell module according to the present utility model.

[0021] Figure 3 It is a schematic diagram of the battery cell module from another angle according to the present utility model.

[0022] Figure 4 It is a schematic diagram of a battery cell support plate according to the present utility model.

[0023] Figure 5 It is a schematic diagram of a bus bar between battery cells according to the present utility model.

[0024] Figure 6 It is a schematic diagram of an output terminal bus bar according to the present utility model.

[0025] Figure 7 It is a schematic diagram of a sampling assembly according to the present utility model.

[0026] Figure 8 It is a schematic diagram of a module bracket according to the present utility model.

[0027] Figure 9 It is a schematic diagram of a module upper cover according to the present utility model.

[0028] Reference numerals: 1-module box body; 11-module bracket; 110-module fixing block; 12-module upper cover; 120-output terminal hole; 13-module side plate; 2-battery cell module; 20-battery cell; 21-battery cell support plate; 210-opening; 211-support plate main body; 212-latching member; 22-bus bar between battery cells; 221-first bus bar main body; 2210-bending portion; 222-first conductive module; 23-output terminal bus bar; 230-output terminal conductive block; 2301-annular groove; 231-second bus bar main body; 232-second conductive module; 24-sampling assembly; 241-sampling assembly main body; 242-voltage sampling module; 243-connector; 244-temperature acquisition module; 3-output interface; 4-inlet water pipe interface; 5-outlet water pipe interface; 6-sealing ring. Detailed implementation manners

[0029] The following specific embodiments are provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent. For example, the order of operations described herein is merely exemplary and is not limited to the order set forth herein, but rather, changes that will be apparent after understanding the disclosure of the present application may be made, except for operations that must occur in a particular order. Additionally, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0030] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0031] Throughout the specification, when an element (such as, a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it can be directly "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, or there can be one or more other elements intervening therebetween. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly above" another element, or "directly covering" another element, there can be no other elements intervening therebetween.

[0032] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0033] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or parts, these members, components, regions, layers, or parts are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or part from another member, component, region, layer, or part. Thus, a first member, component, region, layer, or part as referred to in the examples described herein may also be referred to as a second member, component, region, layer, or part without departing from the teachings of the examples.

[0034] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0035] The terms used herein are for the purpose of describing various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising", "including", and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0036] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Accordingly, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0037] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Additionally, although the examples described herein have a variety of configurations, other configurations will be apparent after understanding the disclosure of the present application.

[0038] As Figures 1 to 9 shown, according to a first aspect of the present utility model, an immersion cooling battery module is provided, and the immersion cooling battery module includes a module box body 1 and a battery cell module 2.

[0039] In the following description, the specific structures of the above components of the immersion cooling battery module and the connection relationships of the above components will be specifically described with reference to Figures 1 to 9 specifically.

[0040] As Figures 1 to 9As shown, in the embodiment, the battery cell module 2 can be hermetically arranged in the module housing 1. The module housing 1 can be provided with a water inlet interface 4 for flowing in a cooling medium (the cooling medium is an insulating medium) and a water outlet interface 5 for flowing out the cooling medium, so that the battery cell module 2 can be cooled by immersion. In addition, the module housing 1 can be provided with an output interface 3, and the output interface 3 can be a low-voltage output interface. The output interface 3 can be electrically connected to the battery cell module 2 for signal transmission (i.e., transmitting a current with a relatively low voltage). The battery cell module 2 can be provided with an output pole conductive block 230, and the output pole conductive block 230 can extend out of the module housing 1 for current transmission (i.e., transmitting a current with a relatively high voltage). In this way, the transfer sealing connector can be omitted, the volume of the battery module can be further reduced, the usage amount of the cooling medium can be reduced, and thus the energy density of the battery pack can be improved.

[0041] Preferably, as Figure 1 , Figure 8 and Figure 9 shown, in the embodiment, the shape of the module housing 1 can be approximately a cuboid. The module housing 1 can include a module bracket 11, a module upper cover 12 and module side plates 13. Among them, the shape of the module bracket 11 can be U-shaped. That is, as Figure 8 shown, the module bracket 11 includes two opposite vertical plates and a horizontal plate connected to the bottom ends of the vertical plates. The battery cell module 2 can be installed inside the module bracket 11, and the battery cell module 2 can be welded or bolted to the plate surface of the module bracket 11. The module upper cover 12 can be a rectangular plate member, and the output interface 3 can be arranged on the module upper cover 12. The battery upper cover can be arranged at the end of the module bracket 11 to form a rectangular frame. The battery upper cover can be welded or bolted to the module bracket 11. In addition, when the battery upper cover and the module bracket 11 are bolted, a sealing structure (such as a sealing ring) needs to be arranged at the connection between the battery upper cover and the module bracket 11. The number of the module side plates 13 can be two. The two module side plates 13 can be respectively arranged on the two sides of the module bracket 11 where no plate member is provided, and the two module side plates 13 are arranged opposite to each other. Preferably, the module side plates 13 can be welded or integrally formed with the module bracket 11. With such an arrangement, the module bracket 11, the module upper cover 12 and the module side plates 13 can surround to form a rectangular closed space, and then the battery cell module 2 can be surrounded inside to introduce the cooling medium to realize immersion cooling.

[0042] Preferably, as Figures 1 to 7As shown, in the embodiment, the battery cell module 2 may include a plurality of battery cells 20, a battery cell support plate 21, an inter-cell bus bar 22, an output terminal bus bar 23, and a sampling assembly 24. Among them, the shape of the battery cell 20 may be cylindrical. A plurality of battery cells 20 are parallel to each other and arranged in an array. Two battery cell support plates 21 may be respectively installed at both ends of the plurality of battery cells 20, and then the whole column composed of the plurality of battery cells 20 is clamped therebetween to fix the plurality of battery cells 20. A plurality of circular openings 210 may be formed on the battery cell support plate 21. The positions of the plurality of openings 210 may correspond to the positions of the electrodes of the plurality of battery cells 20. In addition, the module bracket 11 may be connected to the module housing 1. Specifically, the module bracket 11 may be welded to the battery cell support plate 21. The inter-cell bus bar 22 may be installed in the middle of the battery cell support plate 21. The inter-cell bus bar 22 may be electrically connected to the plurality of battery cells 20 through the openings 210 to achieve series and parallel connections between the battery cells 20. The output terminal bus bar 23 may be installed at both ends of the battery cell support plate 21 (it may be the left end and the right end of the battery cell support plate 21 as shown in Figure 3 ). The output terminal bus bar 23 may be electrically connected to the plurality of battery cells 20 through the openings 210. The output terminal bus bar 23 is used to transmit the current of the battery cell module 2 externally. The output terminal conductive block 230 is provided on the output terminal bus bar 23. The sampling assembly 24 may be electrically connected to the inter-cell bus bar 22 and the output terminal bus bar 23. The sampling assembly 24 is used to collect the voltage and temperature of the battery cell module 2. The output interface 3 may be electrically connected to the sampling assembly 24.

[0043] Specifically, as shown in Figures 2 to 4 , in the embodiment, the shape of the battery cell support plate 21 may be approximately rectangular. The battery cell support plate 21 may include a support plate main body 211 and a plurality of clamping members 212. Among them, the openings 210 may be provided on the support plate main body 211, and the plurality of openings 210 are arranged at intervals. The diameter of the opening 210 may be smaller than the diameter of the battery cell 20 to prevent the battery cell 20 from slipping out of the opening 210. The plurality of clamping members 212 may be integrally formed with the support plate main body 211. The clamping members 212 may be provided on the plate surface of the support plate main body 211 close to the battery cell 20. The clamping members 212 may be L-shaped struts protruding from the plate surface of the support plate main body 211. The plurality of clamping members 212 may be arranged around the outer periphery of the opening 210 so that the end of the battery cell 20 can just be clamped between the plurality of clamping members 212, thereby fixing the battery cell 20.

[0044] Preferably, as shown in Figure 2 , Figure 3 and Figure 5As shown, in an embodiment, the number of the inter-cell busbar 22 can be multiple, and the multiple inter-cell busbars 22 can be arranged in parallel and at intervals. The inter-cell busbar 22 can include a first busbar body 221 and a plurality of first conductive modules 222. Among them, the first busbar body 221 can be arranged along the length direction of the support plate body 211, and the first busbar body 221 can be bent and arranged between two adjacent openings 210. The end of the first busbar body 221 can be formed with a bending portion 2210, and the bending portion 2210 extends in a direction close to the sampling assembly 24. The first busbar body 221 can be connected to the sampling assembly 24 through the bending portion 2210. Multiple first conductive modules 222 can be arranged at intervals along the extension direction of the first busbar body 221. The first conductive module 222 can be formed in a "J" shape, and the legs on both sides of the first conductive module 222 can be welded to the electrodes of the battery cell 20 through the opening 210. The middle part of the first conductive module 222 can be welded to the first busbar body 221, so that the multiple cells 20 can be connected in series or in parallel. In addition, the inter-cell busbar 22 can be arranged on the outer side of the cell support plate 21 (i.e., the sides of the two cell support plates 21 that are away from each other) to further strengthen the fixation of the cell 20. The module side plate 13 can be arranged close to the inter-cell busbar 22 to further fix the inter-cell busbar 22.

[0045] Preferably, Figure 2 , Figure 3 and Figure 6As shown, in the embodiment, the number of output terminal busbars 23 can be two. The two output terminal busbars 23 can be respectively arranged at the positive terminal and the negative terminal of the battery cell module 2, so that the two output terminal busbars 23 serve as the total positive output and the total negative output of the battery cell module 2 respectively. The output terminal busbar 23 can include a second busbar body 231 and a plurality of second conductive modules 232. Among them, the second busbar body 231 can be arranged along the length direction of the support plate body 211. The second busbar body 231 can be welded to the end portion in the width direction of the support plate body 211. The output terminal conductive block 230 can be arranged at the end portion of the second busbar body 231 close to the sampling assembly 24. Specifically, a flat plate section can be formed at the end portion of the second busbar body 231, and the second busbar body 231 can be welded or bolted to the flat plate section. The plurality of second conductive modules 232 can be arranged at intervals along the length direction of the second busbar body 231. The second conductive modules 232 can be arranged on the side portion of the second busbar body 231 facing the battery cell 20, and the positions where the plurality of second conductive modules 232 are arranged correspond to the positions of the openings 210. The plurality of second conductive modules 232 can be electrically connected to the electrodes of the plurality of battery cells 20 through the openings 210, so that the overall positive electrode and negative electrode of the battery cell module 2 are electrically connected to the second busbar body 231 through the second conductive modules 232.

[0046] More preferably, as Figure 2 , Figure 3 and Figure 7As shown, in the embodiment, the sampling assembly 24 may be disposed at an end of the battery cell module 2 close to the module upper cover 12, and the bottom end of the output interface 3 may pass through the module upper cover 12 and be electrically connected to the sampling assembly 24. The sampling assembly 24 may include a sampling assembly main body 241, a plurality of voltage sampling modules 242, a connector 243, and a temperature acquisition module 244. Among them, the sampling assembly main body 241 may be a rectangular plate member, and a circuit for transmitting signals is provided inside it. The plurality of voltage sampling modules 242 may be respectively disposed on both sides of the sampling assembly main body 241. The plurality of voltage sampling modules 242 may be respectively welded or bolted to the bent portion 2210 of the first bus bar main body 221 and the second bus bar main body 231. The connector 243 may be welded to the end of the sampling assembly main body 241 to facilitate the connection of the bottom end of the output interface 3 to the sampling assembly main body 241, that is, the bottom end of the output interface 3 is snap-connected to the connector 243. However, it is not limited thereto. In the case where the connector 243 is not provided on the sampling assembly main body 241, the bottom end of the output interface 3 may be directly connected to the sampling assembly main body 241. The number and position of the temperature acquisition module 244 may be arranged according to the thermal management requirements of the battery pack. Preferably, in the embodiment, the first end of the temperature acquisition module 244 may be welded to the sampling assembly main body 241, and the second end of the temperature acquisition module 244 may be adhered to the position to be temperature-measured (which may be the first conductive module 222).

[0047] In addition, preferably, as Figures 1 to 3 and Figure 9 shown, in the embodiment, the shape of the output pole conductive block 230 may be cylindrical, and an annular groove 2301 may be formed at the bottom of the output pole conductive block 230. A sealing ring 6 may be disposed in the annular groove 2301. A circular output pole hole 120 may be formed in the module upper cover 12 at a position corresponding to the output pole conductive block 230, so that the output pole conductive block 230 can extend out of the output pole hole 120 to transmit current. The diameter of the sealing ring 6 may be larger than the diameter of the output pole hole 120, so that when the module upper cover 12 is assembled, the output pole hole 120 can compress the sealing ring 6 to achieve the sealing function. Preferably, after the module upper cover 12 is assembled, a sealing glue may be applied at the mating portion of the output pole conductive block 230 and the output pole hole 120 to further ensure the sealing function.

[0048] Preferably, as Figure 1 、 Figure 8 and Figure 9As shown, in the embodiment, the outlet water pipe interface 5 can be arranged on the upper cover 12 of the module, and the inlet water pipe interface 4 can be arranged on the module bracket 11. Preferably, the outlet water pipe interface 5 and the inlet water pipe interface 4 can be arranged at the diagonal corners of the module box body 1, so that the cooling medium can fill the module box body 1. The internal terminal of the output interface 3 can be an electrical connection terminal. The output interface 3 can be integrally formed with the upper cover 12 of the module, and sealant is coated at the joint of the electrical connection terminal and the upper cover 12 of the module. Preferably, the thickness of the plate of the module box body 1 can be determined according to the pressure after filling with the cooling medium, and the inner diameters of the outlet water pipe interface 5 and the inlet water pipe interface 4 can be set according to the requirements of the battery pack thermal management system. In addition, as Figure 8 As shown, module fixing blocks 110 can also be arranged on both sides of the module bracket 11, and the shape of the module fixing blocks 110 can be a cuboid. The module fixing blocks 110 can be welded or integrally formed with the vertical plate of the module bracket 11. Threaded holes can be opened at the ends of the module fixing blocks 110. The module fixing blocks 110 are used for bolt connection with the lower shell of the battery pack, so as to install the immersion cooling battery module in the battery pack.

[0049] In addition, according to the second aspect of the present invention, a battery pack is provided, and the battery pack includes the immersion cooling battery module as described above.

[0050] During use, the module box body 1 seals the battery cell module 2 inside, and is provided with an inlet water pipe interface 4 and an outlet water pipe interface 5 to circulate the cooling medium, so as to achieve immersion cooling of the battery cell module 2. In addition, an output interface 3 is arranged at the upper cover 12 of the module box body 1 for signal transmission. The output pole conductive block 230 of the battery cell module 2 extends out of the upper cover 12 of the module for current transmission. In this way, the transfer sealing connector can be omitted, further reducing the volume of the battery module, reducing the usage amount of the cooling medium, improving the fluidity of the cooling medium inside the battery module, enhancing the cooling capacity of the battery cell module 2, reducing the weight of the battery module, and further improving the energy density of the battery pack.

[0051] Finally, it should be noted that the above-described embodiments are only specific implementation manners of the present application, used to illustrate the technical solutions of the present application, rather than limiting it. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the technical field can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An immersion-cooled battery module, installed in a battery pack, characterized in that, The immersion-cooled battery module includes: A module box body provided with an output interface, and the module box body is provided with a water inlet interface and a water outlet interface for circulating a cooling medium; and A battery cell module hermetically arranged in the module box body, the output interface is electrically connected to the battery cell module, the battery cell module is provided with an output pole conductive block, and the output pole conductive block extends out of the module box body.

2. The immersion-cooled battery module according to claim 1, wherein The module box body includes: A module bracket formed in a U shape, and the battery cell module is installed inside the module bracket; A module upper cover installed at the end of the module bracket; and Module side plates arranged on opposite sides of the module bracket; The module bracket, the module upper cover and the module side plates surround and are arranged on the outer periphery of the battery cell module.

3. The immersion-cooled battery module according to claim 1 or 2, wherein The battery cell module includes: Multiple battery cells, the shape of the battery cells is cylindrical, and the multiple battery cells are arranged in an array; Battery cell support plates installed at both ends of the battery cells, the battery cell support plates are connected to the module box body, and multiple openings are formed on the battery cell support plates, and the positions of the multiple openings correspond to the positions of the electrodes of the multiple battery cells; Inter-cell busbars installed in the middle of the battery cell support plates, the inter-cell busbars are electrically connected to the multiple battery cells through the openings, and are used to realize the series and parallel connection between the battery cells; Output pole busbars installed at both ends of the battery cell support plates, the output pole busbars are electrically connected to the multiple battery cells through the openings, and are used to transmit the current of the battery cell module, and the output pole conductive block is arranged on the output pole busbars; and A sampling assembly electrically connected to the inter-cell busbars and the output pole busbars, and is used to collect the voltage and temperature of the battery cell module, and the output interface is electrically connected to the sampling assembly.

4. The immersed cooling battery module according to claim 3, wherein, The battery cell support plate includes: A support plate main body formed with multiple openings, and the diameter of the openings is smaller than the diameter of the battery cells; and Multiple clamping members connected to the support plate main body, the multiple clamping members are arranged around the outer periphery of the openings, and the ends of the battery cells can be clamped with the multiple clamping members.

5. The immersion-cooled battery module according to claim 3, characterized in that, The inter-cell busbars include: A first busbar main body arranged between adjacent openings, and a bent portion is formed at the end of the first busbar main body, and the bent portion is connected to the sampling assembly; and Multiple first conductive modules arranged at intervals along the extending direction of the first busbar main body, the multiple first conductive modules are electrically connected to the electrodes of the multiple battery cells through the openings, and the first conductive modules are electrically connected to the first busbar main body.

6. The immersion-cooled battery module according to claim 5, characterized in that, The output pole busbars include: A second busbar main body arranged at the end of the battery cell support plate, and the output pole conductive block is arranged at the end of the second busbar main body; and Multiple second conductive modules arranged at intervals along the length direction of the second busbar main body, the multiple second conductive modules are electrically connected to the electrodes of the multiple battery cells through the openings, and the second conductive modules are electrically connected to the second busbar main body.

7. The immersed cooling battery module according to claim 6, characterized in that, The sampling assembly includes: A sampling assembly main body internally provided with a circuit for transmitting signals; A plurality of voltage sampling modules are arranged on the sampling assembly main body, and the plurality of voltage sampling modules are respectively connected to the bent portion and the second busbar main body; A connector is arranged on the sampling assembly main body, and the connector is connected to the output interface; and A temperature acquisition module, the first end of the temperature acquisition module is electrically connected to the sampling assembly main body, and the second end of the temperature acquisition module is bonded to the position to be measured for temperature.

8. The immersion-cooled battery module according to claim 2, wherein An annular groove is formed at the bottom of the output pole conductive block, a sealing ring is arranged in the annular groove, an output pole hole is formed in the module upper cover at a position corresponding to the output pole conductive block, the output pole conductive block extends out of the output pole hole, and the diameter of the sealing ring is larger than the diameter of the output pole hole.

9. The immersion-cooled battery module according to claim 2, wherein, The output interface and the water outlet interface are arranged on the module upper cover, the water inlet interface is arranged on the module bracket, the water outlet interface and the water inlet interface are located at the diagonal corners of the module box body, and a module fixing block is arranged on the module bracket for connecting with the lower shell of the battery pack.

10. A battery pack, characterized in that, The battery pack includes the immersion cooling battery module according to any one of claims 1 to 9.

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