Immersed liquid-cooled battery pack

Abstract

The utility model provides an immersed liquid-cooled battery pack, relates to the technical field of battery packs, and aims to solve the problem that the temperature difference consistency among high-power battery cells in the battery pack is not good enough due to the fact that a liquid-cooled plate cannot uniformly dissipate heat around the battery cells, and the immersed liquid-cooled battery pack comprises a plurality of battery cells and a box body, a liquid inlet, a liquid cooling mounting cavity and a liquid outlet which are sequentially communicated are formed in the box body and used for circulating cooling liquid, the battery cells are arranged in the liquid cooling mounting cavity and immersed in the cooling liquid, the battery cells are arranged to form a liquid cooling channel, the liquid inlet is located at the first end of the liquid cooling channel, and the liquid outlet is located at the second end of the liquid cooling channel. The liquid outlet is located at the second end of the liquid cooling channel, part of the liquid cooling channel is located among the battery cells, and part of the liquid cooling channel is located on the outer sides of the battery cells.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to an immersion liquid-cooled battery pack. Background Art

[0002] The transformation of the energy structure from fossil energy to new energy has promoted the rapid development of electric vehicles and the energy storage industry. Lithium batteries are a common energy storage option for electric vehicles. However, the charging and discharging efficiency, capacity, safety and life of lithium batteries are greatly affected by temperature. Too high or too low temperature or a large temperature difference between battery packs will directly affect the performance of the battery pack, causing the battery system to fail prematurely and even causing a series of accidents such as fire and explosion. The heat dissipation effect of the battery pack in the related technology is not good, and the consistency of the temperature difference between the cells cannot be guaranteed. Utility Model Content

[0003] In view of this, the present application provides an immersion liquid-cooled battery pack to improve the problem of insufficient consistency in temperature difference between high-power cells in the battery pack due to the inability of the liquid cooling plate to evenly dissipate heat around the cells.

[0004] The technical solution adopted by this application to solve the above technical problems is:

[0005] In a first aspect, the present application provides an immersion liquid-cooled battery pack, comprising a box body and a plurality of battery cells, the box body being provided with a liquid inlet, a liquid cooling installation cavity and a liquid outlet which are connected in sequence and are used for circulating a cooling liquid, the plurality of battery cells being arranged in the liquid cooling installation cavity and immersed in the cooling liquid, the plurality of battery cells being arranged to form a liquid cooling channel, the liquid inlet being located at a first end of the liquid cooling channel, the liquid outlet being located at a second end of the liquid cooling channel, part of the liquid cooling channel being located between the plurality of battery cells, and part of the liquid cooling channel being located outside the plurality of battery cells.

[0006] In some embodiments of the present application, the plurality of battery cell arrays are arranged to form at least two battery cell units, the at least two battery cell units are arranged in sequence and spaced apart along a first direction, and the battery cell unit includes a plurality of battery cells arranged in sequence and spaced apart along a second direction; the box body is provided with a plurality of liquid inlets, and the plurality of liquid inlets are respectively arranged on opposite sides of the liquid outlet along the first direction, or;

[0007] The box body is provided with a plurality of liquid outlets, and the plurality of liquid outlets are respectively arranged on two opposite sides of the liquid inlet along the first direction.

[0008] In some embodiments of the present application, the box body has a bottom wall and multiple side walls, and the bottom wall and the multiple side walls enclose the liquid cooling installation cavity; the liquid outlet and the liquid inlet are located on the same side wall, the liquid outlet is arranged in the middle area of ​​the side wall along the first direction, and the multiple liquid inlets are respectively arranged on both side areas of the side wall along the first direction, or;

[0009] The liquid inlet is arranged in a middle area of ​​the side wall along the first direction, and the plurality of liquid outlets are respectively arranged in two side areas of the side wall along the first direction.

[0010] In some embodiments of the present application, fixed end plates are provided on two opposite sides of the box body along the second direction, and the fixed end plates are used to abut against the battery cells at two ends of the battery cell unit.

[0011] In some embodiments of the present application, the box body has a bottom wall and multiple side walls, and the bottom wall and the multiple side walls enclose the liquid cooling installation cavity; the liquid inlet is located in an area on the side wall close to the bottom wall, and the liquid outlet is located in an area on the side wall away from the bottom wall.

[0012] In some embodiments of the present application, the immersed liquid-cooled battery pack includes a battery management system module and a cover plate, wherein the cover plate is disposed on the top of the box body and is spaced apart from the coolant, and the battery management system module is located in the gap area between the cover plate and the coolant and is spaced apart from the coolant.

[0013] In some embodiments of the present application, a mounting hole is provided on the side wall of the box body, and the battery management system module further includes a mounting bracket, and the mounting bracket cooperates with the mounting hole.

[0014] In some embodiments of the present application, the cover plate and the box body enclose the liquid cooling installation cavity and the upper accommodating cavity. The upper accommodating cavity is located above the liquid cooling installation cavity and is connected to the liquid cooling installation cavity. The liquid level of the coolant is lower than the lower end opening of the upper accommodating cavity. The battery management system module is arranged in the upper accommodating cavity.

[0015] In some embodiments of the present application, the liquid-cooled installation cavity has a first installation cavity section and a second installation cavity section arranged in sequence along the horizontal direction, and the upper accommodating cavity is located above the first installation cavity section and is staggered with the second installation cavity section; the immersion liquid-cooled battery pack also includes a connecting terminal, which is arranged on the side wall of the box body and is located in the upper accommodating cavity.

[0016] In some embodiments of the present application, a plurality of positioning grooves are provided on the inner bottom surface of the box body, and the positioning grooves are used to position the battery cells.

[0017] In some embodiments of the present application, the immersed liquid-cooled battery pack also includes an electrically connected integrated busbar and connecting terminals, adjacent battery cells are electrically connected through the integrated busbar, the integrated busbar is at least partially immersed in the coolant, and the connecting terminals are arranged on the side walls of the box body and are located above the coolant.

[0018] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0019] The present application provides an immersion liquid-cooled battery pack. In the embodiment of the present application, multiple battery cells are arranged in a liquid-cooling installation cavity in a box body so that the multiple battery cells are completely immersed in the coolant. The coolant can flow in from the first end where the liquid inlet is located, pass through the multiple battery cells and the outside of the multiple battery cells in turn, and then flow out from the second end where the liquid outlet is located, so that the coolant can achieve better heat dissipation around the battery cells, thereby ensuring that the temperature difference around each battery cell of the battery pack is more consistent during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments are briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but are not intended to limit the present application, wherein:

[0021] Figure 1 A schematic diagram of the structure of an immersion liquid-cooled battery pack provided in an embodiment of the present application;

[0022] Figure 2 A cross-sectional schematic diagram of an immersion liquid-cooled battery pack provided in an embodiment of the present application;

[0023] Figure 3 Another cross-sectional schematic diagram of an immersion liquid-cooled battery pack provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of a box provided in an embodiment of the present application;

[0025] Figure 5 A schematic cross-sectional view of a box provided in an embodiment of the present application.

[0026] The reference numerals are as follows:

[0027] 1. Battery cell; 2. Box body; 21. Liquid inlet; 22. Liquid outlet; 23. Liquid cooling installation cavity; 231. Upper accommodating cavity; 232. First installation cavity section; 233. Second installation cavity section; 24. Fixed end plate; 25. Installation hole; 26. Connection terminal; 27. Positioning groove; 3. Battery management system module; 4. Cover plate; 5. Integrated busbar. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] In the description of this application, it should be understood that the words "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles disclosed in this application.

[0031] In the related art, a liquid-cooled battery pack usually has a liquid cooling plate next to the battery cell. For high-power battery cells, the heat dissipation effect is slow and the temperature difference consistency around the battery cell is not high. The battery in the embodiment of the present application is a storage battery used in a vehicle or other stable places, so there is no need to excessively consider vibration.

[0032] See also Figure 1 Figure 2 and Figure 3 As shown, Figure 1 A schematic diagram of the structure of an immersion liquid-cooled battery pack provided in an embodiment of the present application is shown in FIG. Figure 2 A cross-sectional schematic diagram of an immersion liquid-cooled battery pack provided in an embodiment of the present application, Figure 3Another cross-sectional schematic diagram of the immersion liquid-cooled battery pack provided in an embodiment of the present application. The present application provides an immersion liquid-cooled battery pack, including a case 2 and a plurality of battery cells 1. The case 2 is provided with a liquid inlet 21, a liquid cooling installation cavity 23 and a liquid outlet 22 which are connected in sequence for circulating the cooling liquid. The plurality of battery cells 1 are arranged in the liquid cooling installation cavity 23 and immersed in the cooling liquid. The plurality of battery cells 1 are arranged to form a liquid cooling channel. The liquid inlet 21 is located at a first end of the liquid cooling channel, the liquid outlet 22 is located at a second end of the liquid cooling channel, part of the liquid cooling channel is located between the plurality of battery cells 1, and part of the liquid cooling channel is located outside the plurality of battery cells 1.

[0033] It can be understood that multiple battery cells 1 are located in the liquid-cooled installation cavity 23 inside the box body 2, and the coolant is located in the box body 2 and completely immerses and covers each battery cell 1, thereby achieving heat dissipation around the battery cells 1 inside the box body 2. Compared with arranging the battery module as a whole in the box body 2, it can achieve a better heat dissipation effect for multiple battery cells 1.

[0034] It can be understood that multiple battery cells 1 are arranged to form a liquid cooling channel, the liquid inlet 21 is located at the first end of the liquid cooling channel, the liquid outlet 22 is located at the second end of the liquid cooling channel, part of the liquid cooling channel is located between the multiple battery cells 1, and part of the liquid cooling channel is located outside the multiple battery cells 1, so that the coolant can flow in from the first end where the liquid inlet 21 is located, pass through the multiple battery cells 1 and the outside of the multiple battery cells 1 in turn, and then flow out from the second end where the liquid outlet 22 is located, thereby achieving consistent temperature differences throughout the battery pack and ensuring high heat dissipation effect inside the battery pack.

[0035] Beneficial effects of the embodiments of the present application: The embodiments of the present application arrange multiple battery cells 1 in the liquid-cooling installation cavity 23 in the box body 2, so that the multiple battery cells 1 are completely immersed in the coolant. The coolant can flow in from the first end where the liquid inlet 21 is located, pass through the multiple battery cells 1 and the outside of the multiple battery cells 1 in turn, and then flow out from the second end where the liquid outlet 22 is located, so that the coolant can achieve better heat dissipation around the battery cells 1, thereby ensuring that the temperature difference around each battery cell 1 during operation of the battery pack is more consistent.

[0036] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, a plurality of battery cells 1 are arranged in an array to form at least two battery cell units, and the at least two battery cell units are arranged in sequence and spaced apart along a first direction, and the battery cell unit includes a plurality of battery cells 1 arranged in sequence and spaced apart along a second direction; a plurality of liquid inlets 21 are provided on the box body 2, and the plurality of liquid inlets 21 are respectively arranged on opposite sides of the liquid outlet 22 along the first direction, or;

[0037] The box body 2 is provided with a plurality of liquid outlets 22 , and the plurality of liquid outlets 22 are respectively arranged on two opposite sides of the liquid inlet 21 along the first direction.

[0038] It is understandable that gaps may be provided between adjacent battery cells 1 in at least two battery cell units, so that the temperature difference of each battery cell 1 is more consistent.

[0039] It is understandable that a small gap width between the battery cells 1 can make the overall structure more compact, while also reducing the volume of the coolant and the production cost.

[0040] It can be understood that the multiple battery cells 1 are divided into multiple battery cell units arrayed along the first direction, adjacent battery cell units, and multiple battery cell units arrange the battery cells 1 in a row and form outer channels located outside the multiple battery cell units and internal channels located between the multiple battery cell units, that is, the outer channel and the internal channel can enclose the outside and inside of the battery cell 1, so that the coolant can pass through the outer channel and the inner channel from the liquid inlet 21 to achieve a more uniform heat dissipation effect on the inside and outside of the battery cell 1, thereby improving the consistency of the temperature difference between the battery cells 1.

[0041] See also Figure 3 As shown, in some embodiments of the present application, the box body 2 has a bottom wall and multiple side walls, and the bottom wall and the multiple side walls enclose a liquid cooling installation cavity 23; the liquid outlet 22 and the liquid inlet 21 are located on the same side wall, the liquid outlet 22 is arranged in the middle area of ​​the side wall along the first direction, and the multiple liquid inlets 21 are respectively arranged on the two side areas of the side wall along the first direction.

[0042] It can be understood that the liquid inlet 21 is located in the two side areas along the first direction on the side wall, and the liquid outlet 22 is located in the middle area along the first direction on the side wall, so that the coolant can enter the outside of the multiple battery cell units from the liquid inlet 21, and then return and flow out from the middle of the multiple battery cell units, thereby making the heat dissipation of the multiple battery cell units more uniform.

[0043] or;

[0044] The liquid inlet 21 is disposed in a middle region of the side wall along the first direction, and the plurality of liquid outlets 22 are respectively disposed in two side regions of the side wall along the first direction.

[0045] It can be understood that the liquid inlet 21 is located in the middle area of ​​the side wall along the first direction, and the liquid outlet 22 is located in the two side areas of the side wall along the first direction, so that the coolant can flow in from the middle of the multiple battery cell units, and then return and flow out from the outside of the multiple battery cell units, thereby making the heat dissipation of the multiple battery cells 1 more uniform.

[0046] It should be understood that the heat dissipation effects of the above two methods are similar, and both can ensure good consistency of temperature difference between battery cells.

[0047] See also Figure 4 As shown, Figure 4 This is a structural schematic diagram of a box provided in an embodiment of the present application. In some embodiments of the present application, fixed end plates 24 are provided on opposite sides of the box 2 along the second direction, and the fixed end plates 24 are used to abut against the battery cells 1 at both ends of the battery cell unit.

[0048] It can be understood that end plates are provided on the opposite side walls of the box body 2 along the second direction, which can block the gap between the battery cell 1 and the inner wall of the box body 2, and play a role in supporting the battery cell 1, thereby preventing the battery cell 1 from being unsupported on all sides and being offset from the box body 2 itself, thereby blocking the normal flow of the coolant.

[0049] Furthermore, the hollow interior of the end portion can also play a role in stabilizing the pressure.

[0050] See also Figure 1 As shown, in some embodiments of the present application, the box body 2 has a bottom wall and multiple side walls, which enclose a liquid cooling installation cavity 23; the liquid inlet 21 is located in an area on the side wall close to the bottom wall, and the liquid outlet 22 is located in an area on the side wall away from the bottom wall.

[0051] It can be understood that the liquid inlet 21 is located in the area of ​​the side wall close to the bottom wall, and the liquid outlet 22 is located in the area of ​​the side wall away from the bottom wall, which can enable the coolant to dissipate heat from the bottom of the battery cell 1 upward, avoiding heat accumulation in the middle part of the multiple battery cells 1, thereby making the heat dissipation effect around the multiple battery cells 1 better.

[0052] See also Figure 2 As shown, in some embodiments of the present application, the immersed liquid-cooled battery pack includes a battery management system module 3 and a cover plate 4, the cover plate 4 is covered on the top of the box body 2 and is spaced apart from the coolant, and the battery management system module 3 is located in the gap area between the cover plate 4 and the coolant and is spaced apart from the coolant.

[0053] It is understandable that the battery management system module 3 is located between the cover plate 4 and the battery module so that the battery management system module 3 does not need to be immersed in the coolant, thereby solving the sealing problem of the battery management system module 3 and shortening the length of the entire battery pack.

[0054] See also Figure 4 As shown, in some embodiments of the present application, a mounting hole 25 is provided on the side wall of the box body 2 , and the battery management system module 3 further includes a mounting bracket, which cooperates with the mounting hole 25 .

[0055] It can be understood that a mounting hole 25 is provided on the top side wall of the box body 2, and the battery management system module 3 also includes a mounting bracket. The mounting bracket cooperates with the mounting hole 25, so that the battery management system module 3 can be fixed to the cover plate 4, so that the battery management system module 3 does not need to contact with the coolant, thereby making the battery management system module 3 have better waterproof performance and improving its own life.

[0056] See also Figure 2 As shown, in some embodiments of the present application, the cover plate 4 and the box body 2 enclose a liquid cooling installation cavity 23 and an upper accommodating cavity 231. The upper accommodating cavity 231 is located above the liquid cooling installation cavity 23 and is connected to the liquid cooling installation cavity 23. The liquid level of the coolant is lower than the lower end opening of the upper accommodating cavity 231, and the battery management system module 3 is arranged in the upper accommodating cavity 231.

[0057] It can be understood that the cover plate 4 and the box body 2 enclose a liquid cooling installation cavity 23 and an upper accommodating cavity 231 for accommodating the battery management system module 3, thereby preventing the battery management system module 3 from being immersed in the coolant. The position of the cover plate 4 where the liquid cooling installation cavity 23 is not set is flush with the top surface of the battery cell 1, and the surface of the coolant is flush with the top surface of the liquid cooling installation cavity 23, thereby preventing the coolant surface from vibrating.

[0058] See also Figure 5 As shown, Figure 5 A cross-sectional schematic diagram of a box body provided in an embodiment of the present application. In some embodiments of the present application, the liquid-cooled installation cavity 23 has a first installation cavity section 232 and a second installation cavity section 233 arranged in sequence along the horizontal direction, and the upper accommodating cavity 231 is located above the first installation cavity section 232 and is staggered with the second installation cavity section 233; the immersion liquid-cooled battery pack also includes a connecting terminal 26, which is arranged on the side wall of the box body 2 and is located in the upper accommodating cavity 231.

[0059] It can be understood that the second installation cavity section 233 of the cover plate 4 is flush with the top surface of the battery cell 1 , and the surface of the coolant is flush with the top surface of the second installation cavity section 233 , thereby preventing the surface of the coolant from vibrating.

[0060] See also Figure 4 and Figure 5 As shown, in some embodiments of the present application, a plurality of positioning grooves 27 are provided on the inner bottom surface of the box body 2 , and the positioning grooves 27 are used to position the battery cells 1 .

[0061] It can be understood that the bottom surface of the box 2 is provided with positioning grooves 27 for positioning multiple battery cells 1. During the assembly of the battery cells 1, the battery cells 1 can be first installed one by one inside the box 2 to prevent them from shaking, and then the CCS components and the battery management system module 3 are installed on the top of the battery cells 1. In this way, after assembly, the battery cells 1 are relatively fixed and will not move around, and the liquid cooling channel will not be blocked.

[0062] In some embodiments of the present application, the immersed liquid-cooled battery pack also includes an electrically connected integrated busbar 5 and connecting terminals 26. Adjacent battery cells 1 are electrically connected through the integrated busbar 5. The integrated busbar 5 is at least partially immersed in the coolant. The connecting terminals 26 are arranged on the side wall of the box 2 and are located above the coolant.

[0063] It is understandable that the integrated busbar 5 is located on the bottom surface of the second end of the cover plate 4, that is, the integrated busbar 5 is immersed in the coolant along with the battery cell 1, so it should be noted that the integrated busbar 5 needs to have a waterproof effect.

[0064] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0065] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0066] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0067] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content of this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

Claims

1. An immersion liquid-cooled battery pack, characterized in that: The invention comprises a plurality of battery cells (1) and a housing (2), wherein the housing (2) is provided with a liquid inlet (21), a liquid outlet (22) and a liquid cooling installation cavity (23) which are connected in sequence and are used for circulating a cooling liquid, wherein the plurality of battery cells (1) are arranged in the liquid cooling installation cavity (23) and immersed in the cooling liquid, wherein the plurality of battery cells (1) are arranged to form a liquid cooling channel, wherein the liquid inlet (21) is located at a first end of the liquid cooling channel, and the liquid outlet (22) is located at a second end of the liquid cooling channel, wherein part of the liquid cooling channel is located between the plurality of battery cells (1), and part of the liquid cooling channel is located outside the plurality of battery cells (1).

2. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The plurality of battery cells (1) are arranged in an array to form at least two battery cell units, the at least two battery cell units are arranged in sequence and at intervals along a first direction, and the battery cell unit comprises a plurality of battery cells (1) arranged in sequence and at intervals along a second direction; the box body (2) is provided with a plurality of liquid inlets (21), the plurality of liquid inlets (21) are respectively arranged on opposite sides of the liquid outlet (22) along the first direction, or; The box body (2) is provided with a plurality of liquid outlets (22), and the plurality of liquid outlets (22) are respectively arranged on two opposite sides of the liquid inlet (21) along the first direction.

3. The immersion liquid-cooled battery pack according to claim 2, characterized in that: The box body (2) has a bottom wall and multiple side walls, and the bottom wall and the multiple side walls enclose the liquid cooling installation cavity (23); the liquid outlet (22) and the liquid inlet (21) are located on the same side wall, the liquid outlet (22) is arranged in the middle area of ​​the side wall along the first direction, and the multiple liquid inlets (21) are respectively arranged on the two side areas of the side wall along the first direction, or; The liquid inlet (21) is arranged in a middle area of ​​the side wall along the first direction, and the plurality of liquid outlets (22) are respectively arranged in two side areas of the side wall along the first direction.

4. The immersion liquid-cooled battery pack according to claim 2, characterized in that: Fixed end plates (24) are provided on opposite sides of the box body (2) along the second direction, and the fixed end plates (24) are used to abut against the battery cells (1) located at two ends of the battery cell unit.

5. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The box body (2) has a bottom wall and multiple side walls, and the bottom wall and the multiple side walls enclose the liquid cooling installation cavity (23); the liquid inlet (21) is located in an area on the side wall close to the bottom wall, and the liquid outlet (22) is located in an area on the side wall away from the bottom wall.

6. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The immersed liquid-cooled battery pack comprises a battery management system module (3) and a cover plate (4), wherein the cover plate (4) is arranged on the top of the box body (2) and is spaced apart from the coolant, and the battery management system module (3) is located in a gap area between the cover plate (4) and the coolant and is spaced apart from the coolant.

7. The immersion liquid-cooled battery pack according to claim 6, characterized in that: The side wall of the box body (2) is provided with a mounting hole (25), and the battery management system module (3) further comprises a mounting bracket, and the mounting bracket cooperates with the mounting hole (25).

8. The immersion liquid-cooled battery pack according to claim 6, characterized in that: The cover plate (4) and the box body (2) enclose the liquid cooling installation cavity (23) and the upper accommodating cavity (231); the upper accommodating cavity (231) is located above the liquid cooling installation cavity (23) and is in communication with the liquid cooling installation cavity (23); the liquid level of the cooling liquid is lower than the lower end opening of the upper accommodating cavity (231); and the battery management system module (3) is arranged in the upper accommodating cavity (231).

9. The immersion liquid-cooled battery pack according to claim 8, characterized in that: The liquid-cooled installation cavity (23) comprises a first installation cavity section (232) and a second installation cavity section (233) which are arranged in sequence along a horizontal direction, and the upper accommodating cavity (231) is located above the first installation cavity section (232) and is arranged alternately with the second installation cavity section (233); the immersed liquid-cooled battery pack also comprises a connecting terminal (26), and the connecting terminal (26) is arranged on a side wall of the box body (2) and is located in the upper accommodating cavity (231).

10. The submerged liquid-cooled battery pack according to claim 1, characterized in that: The inner bottom surface of the box body (2) is provided with a plurality of positioning grooves (27), and the positioning grooves (27) are used to position the battery core (1).

11. The submerged liquid-cooled battery pack according to claim 1, characterized in that: The immersed liquid-cooled battery pack further comprises an electrically connected integrated busbar (5) and a connecting terminal (26), adjacent battery cells (1) are electrically connected via the integrated busbar (5), the integrated busbar (5) is at least partially immersed in the coolant, and the connecting terminal (26) is arranged on a side wall of the box body (2) and is located above the coolant.

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