Liquid-cooling integrated battery case and power battery pack

Abstract

Provided in the present invention are a liquid-cooling integrated battery case and a power battery pack. A battery cell accommodating space is enclosed by a liquid-cooling base plate, a front frame, a rear frame, a left-side cross beam and a right-side cross beam; a liquid-cooling flow channel extending through the left and right is provided in the liquid-cooling base plate; the liquid-cooling base plate is connected to the left-side cross beam and the right-side cross beam, and a flow guide channel extending through the front and rear is provided in each of the left-side cross beam and the right-side cross beam; and the flow guide channel of the left-side cross beam is in communication with a left port of the liquid-cooling flow channel, and the flow guide channel of the right-side cross beam is in communication with a right port of the liquid-cooling flow channel, so as to form a liquid-cooling system of the liquid-cooling integrated battery case. The liquid-cooling connection design can be simplified, thereby reducing the design cost; moreover, no internal space of the battery pack is occupied, thereby improving the volume utilization rate of the battery pack.

Description

A liquid-cooled integrated battery housing and power battery pack Technical Field

[0001] This invention relates to the field of power batteries and their cooling technology, and in particular to a liquid-cooled integrated battery housing. Background Technology

[0002] With the continuous development of battery technology in the new energy battery field, the application of liquid cooling systems in battery packs is becoming increasingly widespread. Traditional battery pack liquid cooling systems have several integration methods: one is to separate the liquid cooling system from the battery housing, requiring the liquid cooling plate to be connected to the housing frame or placed inside the battery pack; another method is to integrate the liquid cooling system directly with the battery pack housing, retaining only a few connecting pipes inside the battery pack to reduce the number of components. Of these two methods, the former has more connection structures, is more complex to manufacture, and has higher costs, while the latter occupies internal space in the battery pack housing, reducing the utilization rate of the internal space.

[0003] Furthermore, the liquid cooling channels in existing liquid cooling plates typically employ a meandering structure, flowing out after a series of bends and detours. Due to this meandering structure, the coolant must travel a considerable distance and time within the liquid cooling plate, meaning that even absorbed heat cannot be dissipated quickly enough. For example, if both the coolant inlet and outlet are at the front of the liquid cooling plate, the coolant flows from the front to the back and then back again, resulting in a minimum flow path of at least twice the length of the liquid cooling plate. This also compromises the cooling efficiency. Even in existing designs with a front-to-back flow configuration, the fluid channels occupy space at both ends, making them less practical than designs with inlets and outlets on the same side.

[0004] In addition, traditional liquid cooling channels require reserved welding areas, and the channel area accounts for approximately 60% of the overall area of ​​the battery box base plate. The relatively small channel area affects the cooling and heat dissipation effect. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a liquid-cooled integrated battery housing and a power battery pack.

[0006] A liquid-cooled integrated battery box, which consists of a liquid-cooled base plate, a front frame, a rear frame, a left side beam, and a right side beam forming a cell housing space;

[0007] The liquid-cooled base plate has a liquid-cooled channel that runs from left to right inside, and the upper surface of the liquid-cooled base plate is used to place the battery cells.

[0008] The liquid-cooled base plate connects the left and right side beams, and both the left and right side beams have a through-flow channel.

[0009] The flow channel of the left side beam is connected to the left port of the liquid cooling channel, and the flow channel of the right side beam is connected to the right port of the liquid cooling channel to form a liquid cooling system for the integrated liquid-cooled battery box.

[0010] Furthermore, the inner wall of the left side beam is provided with a series of small guide holes arranged in the front-to-back direction to connect the guide channel of the left side beam with the left port of the liquid cooling channel.

[0011] The inner wall of the right side beam is provided with a series of small guide holes arranged in the front-to-back direction to connect the guide channel of the right side beam with the right port of the liquid cooling channel.

[0012] Furthermore, front slots are provided in the areas corresponding to the front ports of the air guide channels of the front frame, the left side beam, and the right side beam.

[0013] An interface component passes through each front slot. The first end of the interface component is connected to the front port of the corresponding flow channel, and the second end of the interface component is used to connect to an external water pipe.

[0014] Furthermore, rear slots are provided in the areas corresponding to the rear ports of the flow channels of the rear frame, the left side beam, and the right side beam.

[0015] The rear ports of the flow channels of the left and right side beams are each blocked by the first end of a plug, and the second end of the plug is accommodated in the corresponding rear slot.

[0016] Furthermore, an energy-absorbing structure is provided inside the liquid-cooled base plate, and the energy-absorbing structure is located below the liquid-cooled flow channel.

[0017] Furthermore, a first weight-reduction structure is provided inside the liquid-cooled base plate, which is located below the energy-absorbing structure.

[0018] Furthermore, the liquid cooling channel is a first cavity structure arranged in a front-to-back direction and extending through the left and right sides;

[0019] The energy-absorbing structure is a second cavity structure with a row of front-to-back arranged and open to the left and right.

[0020] The first weight reduction structure is a third cavity structure arranged in a front-to-back direction and extending left and right;

[0021] The first cavity structure, the second cavity structure, and the third cavity structure are arranged in a one-to-one correspondence in the vertical direction, and their shapes complement each other.

[0022] Furthermore, a second weight-reduction structure is provided inside both the front and rear frames.

[0023] Furthermore, both the left and right side beams are equipped with a third weight-reduction structure.

[0024] A power battery pack includes the aforementioned liquid-cooled integrated battery housing, with battery cells placed on the upper surface of the liquid-cooled base plate inside the battery housing.

[0025] The beneficial technical effects of this invention are as follows: By hollowing out the liquid-cooled base plate of the battery pack and setting liquid-cooled flow channels inside, and setting guide channels on the left and right side beams of the battery pack, one guide channel introduces the fluid into the liquid-cooled flow channel and the other guide channel leads the fluid out. This simplifies the liquid-cooling connection design, reduces design costs, and does not occupy internal space of the battery pack, thus improving the volume utilization rate of the battery pack. Furthermore, the cooling flow channels of this invention are horizontally continuous, so the incoming cooling fluid does not need to flow circuitously through the liquid-cooled base plate to remove heat; it directly enters and exits from both sides. The heat-conducting fluid flows out quickly, and the cold fluid enters quickly, greatly improving the cooling effect. Therefore, the cooling performance of this invention is also improved. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the overall structure of a liquid-cooled integrated battery box according to the present invention;

[0027] Figure 2 is a front view of the left side beam of a liquid-cooled integrated battery box according to the present invention;

[0028] Figure 3 is a front view of the tail end of the left side beam of a liquid-cooled integrated battery box according to the present invention;

[0029] Figure 4 is a front view of the right side beam of a liquid-cooled integrated battery box according to the present invention;

[0030] Figure 5 is a front view of the tail end of the right side crossbeam of a liquid-cooled integrated battery box according to the present invention;

[0031] Figure 6 is a front view of the liquid-cooled base plate of an integrated liquid-cooled battery box according to the present invention;

[0032] Figure 7 is a partial enlarged C-view of the liquid-cooled base plate of a liquid-cooled integrated battery box according to the present invention;

[0033] Figure 8 is a front view of the front frame of a liquid-cooled integrated battery box according to the present invention;

[0034] Figure 9 is a front view of the rear frame of a liquid-cooled integrated battery box according to the present invention;

[0035] Figure 10 is a structural schematic diagram of the first interface component of a liquid-cooled integrated battery box according to the present invention;

[0036] Figure 11 is a structural schematic diagram of the second interface component of a liquid-cooled integrated battery box according to the present invention;

[0037] Figure 12 is a schematic diagram of the structure of the plug of a liquid-cooled integrated battery box according to the present invention;

[0038] Figure 13 is a front view of the cell assembly of a liquid-cooled integrated battery box according to the present invention;

[0039] Figure 14 is a top view of the cell assembly of a liquid-cooled integrated battery box according to the present invention;

[0040] Figure 15 is a cross-sectional view of the battery cells after assembly in a liquid-cooled integrated battery box according to the present invention.

[0041] Figure 16 is a cross-sectional view of the longitudinal side beam of the BB after the cell assembly of the liquid-cooled integrated battery box according to the present invention.

[0042] Wherein: 1-Left side crossbeam; 101-First flow channel; 102-First flow orifice; 103-Inner wall of the left side crossbeam; 104-Outer wall of the left side crossbeam; 2-Right side crossbeam; 201-Second flow channel; 202-Second flow orifice; 203-Inner wall of the right side crossbeam; 204-Outer wall of the right side crossbeam; 3-Liquid-cooled base plate; 301-Liquid-cooled flow channel; 302-Energy-absorbing structure; 303-First weight-reducing structure; 4-Front frame; 401-First slot; 402-Second slot; 5-Rear frame; 501-Third slot; 502-Fourth slot; 6-Plug; 602-Threaded part of plug; 601-Fasting part of plug; 7-Sealing ring; 8-First interface component; 801-Fasting part of the first interface component; 802-First end of the first interface component; 803-Second end of the first interface component; 9-Second interface component; 901-Fasting part of the second interface component; 902-First end of the second interface component; 903-Second end of the second interface component; 10-Battery cell; 11-Thermal conductive adhesive. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0046] Referring to Figures 1, 6 and 7, the present invention provides a liquid-cooled integrated battery box, wherein the integrated battery box is formed by a liquid-cooled base plate (3), a front frame (4), a rear frame (5), a left side beam (1) and a right side beam (2) to form a cell housing space.

[0047] The liquid-cooled base plate (3) has a liquid-cooled flow channel (301) that runs through the left and right sides.

[0048] The liquid-cooled base plate (3) is connected to the left side crossbeam (1) and the right side crossbeam (2). Both the left side crossbeam (1) and the right side crossbeam (2) have a through-flow channel.

[0049] The flow channel of the left side beam (1) is connected to the left port of the liquid cooling channel (301), and the flow channel of the right side beam (2) is connected to the right port of the liquid cooling channel (301) to form a liquid cooling system for the integrated liquid cooling battery box.

[0050] By hollowing out the liquid-cooled base plate of the battery pack and setting up liquid-cooled flow channels, and setting guide channels on the left and right side beams of the battery pack, one guide channel introduces the fluid into the liquid-cooled flow channel and the other guide channel leads the fluid out. This simplifies the liquid-cooling connection design, reduces design costs, and does not occupy internal battery pack space, thus improving the battery pack volume utilization rate. Furthermore, the cooling flow channels of this invention are horizontally continuous, so the incoming cooling fluid does not need to flow circuitously through the liquid-cooled base plate to remove heat; it directly enters and exits from both sides. The heat-conducting fluid flows out quickly, and the cold fluid enters quickly, greatly improving the cooling effect. Therefore, the cooling performance of this invention is also improved.

[0051] Furthermore, the flow channel of the present invention is through-flowing from the left and right sides, and the liquid cooling base plate is connected to the frame and the side beams on the side, so that the area of ​​the liquid cooling flow channel accounts for more than 90% of the total area of ​​the liquid cooling base plate, which greatly improves the heat dissipation efficiency of the battery cells placed on the upper surface of the liquid cooling base plate.

[0052] Referring to Figures 2-5, further, the inner wall of the left side beam (1) is provided with a series of small guide holes arranged in the front and back direction to connect the guide channel of the left side beam (1) and the left port of the liquid cooling channel (301).

[0053] The inner wall of the right side beam (2) is provided with a series of small guide holes arranged in the front and back direction to connect the guide channel of the right side beam (2) and the right port of the liquid cooling channel (301).

[0054] The left side beam (1) has a front-to-back through guide channel, namely the first guide channel (101), and the inner side wall (103) has a series of guide holes, namely the first guide hole (102).

[0055] The right side beam (2) has a through-flow channel (201) inside, and the inner wall (203) has a series of small flow holes (202).

[0056] The flow channels and liquid cooling channels are connected by flow guide holes.

[0057] The inner wall (103) of the left side beam (1) faces the inside of the battery box, and the outer wall (104) of the left side beam (1) faces the outside of the box.

[0058] The inner wall (203) of the right side beam (2) faces the inside of the battery box, and the outer wall (204) of the right side beam (2) faces the outside of the battery box.

[0059] Referring to Figures 13, 14 and 15, the liquid-cooled base plate (3) is further connected to the front frame (4) and the rear frame (5). The left side beam (1), the front frame (4), the right side beam (2) and the rear frame (5) are connected at the end, forming a cell housing space for the battery box with the liquid-cooled base plate (3). The upper surface of the liquid-cooled base plate (3) is used to place the cell (10).

[0060] The inner wall of the front frame (4) faces the inside of the battery box, and the outer wall of the front frame (4) faces the outside of the battery box.

[0061] The inner wall of the rear frame (5) faces the inside of the battery box, and the outer wall of the rear frame (5) faces the outside of the battery box.

[0062] Furthermore, the upper surface of the liquid-cooled base plate (3) is used to place the battery cell (10). Thermally conductive adhesive (11) can be applied to the upper surface of the liquid-cooled base plate (3) before placing the battery cell (10).

[0063] In one embodiment of the present invention, the first guide channel (101) is a liquid inlet channel and the second guide channel (201) is a liquid outlet channel. After the low-temperature coolant enters the first guide channel (101), it is introduced into the left port (here, the liquid inlet) of the liquid cooling channel (301) through the first guide hole (102). After the coolant absorbs the heat generated by the battery cell through the liquid cooling channel (301), it flows out from the right port (here, the liquid outlet) of the liquid cooling channel (301) and is introduced into the second guide channel (201) through the second guide hole (202). Then, the coolant that has absorbed the heat flows out from the second guide channel (201).

[0064] Furthermore, the first guide hole (102) is located in the projection area of ​​the left port of the liquid cooling channel (301) on the liquid cooling base plate (3) of the battery box on the left side beam (1) in the height direction.

[0065] Furthermore, the second guide hole (202) is located in the projection area of ​​the right port of the liquid cooling channel (301) on the right side beam (2) of the liquid cooling base plate (3) of the battery box in the height direction.

[0066] Referring to Figures 8, 10, 11 and 16, furthermore, the front slots are provided in the areas corresponding to the front ports of the guide channels of the front frame (4) and the left side beam (1) and the right side beam (2);

[0067] An interface component passes through each front slot. The first end of the interface component is connected to the front port of the corresponding flow channel, and the second end of the interface component is used to connect to an external water pipe.

[0068] The interface component corresponding to the front port of the first flow channel (101) is the first interface component (8), and the interface component corresponding to the front port of the second flow channel (201) is the second interface component (9).

[0069] The front slot (401) opened in the area corresponding to the front port of the first flow channel (101) is the first slot (401), and the front slot (402) opened in the area corresponding to the front port of the second flow channel (201) is the second slot (402).

[0070] The first end (802) of the first interface component (8) is connected to the threaded part of the front port of the first guide channel (101), and the second end (803) of the first interface component (8) passes through the first slot (401) and is exposed on the outer side wall of the front frame (4).

[0071] The first end (902) of the second interface component (9) is connected to the threaded portion of the front port of the second guide channel (201), and the second end (903) of the second interface component (9) passes through the second slot (402) and exposes the outer side wall of the front frame (4).

[0072] The first end (802) of the first interface component (8) is connected to the front port of the first flow channel (101), and the second end (803) is used to connect to an external water pipe to enable the flow of coolant between the water pipe and the first flow channel (101). The first end (802) of the first interface component (8) has an external thread, and the threaded part of the front port of the first flow channel (101) has a threaded groove to form an internal thread, which is connected to the first end (802) of the first interface component (8) by thread. A sealing ring (7) is also provided. The fastening part (801) of the first interface component (8) is pressed against the front port of the first flow channel (101) by the sealing ring (7) to achieve a seal and prevent coolant leakage.

[0073] The size of the first slot (401) is larger than the maximum outer circle diameter formed by the fastening part (801) of the first interface component (8) so as to accommodate the fastening part (801) of the first interface component (8).

[0074] Preferably, the first slot (401) can be a square slot.

[0075] The first end (902) of the second interface component (9) is connected to the front port of the second guide channel (201), and the second end (903) is used to connect to an external water pipe to enable coolant flow between the water pipe and the second guide channel (201). The first end (902) of the second interface component (9) has an external thread, and the threaded part of the front port of the second guide channel (201) has a threaded groove to form an internal thread, which is connected to the first end (902) of the second interface component (9) by thread. A sealing ring (7) is also provided. The fastening part (901) of the second interface component (9) is pressed against the front port of the second guide channel (201) by the sealing ring (7) to achieve a seal and prevent coolant leakage.

[0076] The size of the second slot (402) is larger than the maximum outer circle diameter formed by the fastening part (901) of the second interface component (9) so as to accommodate the fastening part (901) of the second interface component (9).

[0077] Preferably, the second slot (402) can be a square slot.

[0078] Referring to Figures 9 and 12, furthermore, the rear frame (5) and the area corresponding to the rear port of the flow channel of the left side beam (1) and the right side beam (2) are all provided with rear slots;

[0079] The rear ports of the flow channels of the left side beam (1) and the right side beam (2) are each blocked by the first end of a plug (6), and the second end of the plug (6) is accommodated in the corresponding rear slot.

[0080] The first end of the plug (6) is a threaded part (602) and the second end is a fastening part (601). The threaded part (602) of one plug (6) is connected to the threaded part of the rear port of the first flow channel (101), and the threaded part (602) of the other plug (6) is connected to the threaded part of the rear port of the second flow channel (201).

[0081] The threaded portion (602) of the plug (6) is an external thread, and the threaded portion of the rear port of the first flow channel (101) is a threaded groove, forming an internal thread, which is connected to the plug (6) by thread. A sealing ring (7) is also provided. The fastening portion (601) of the plug (6) is pressed against the rear port of the first flow channel (101) by the sealing ring (7) to achieve a seal and prevent coolant from flowing out from the rear port of the first flow channel (101).

[0082] Similarly, the threaded portion of the rear port of the second flow channel (201) is also a threaded groove, forming an internal thread, which is connected to the plug (6) by thread. A sealing ring (7) is also provided. The fastening part (601) of the plug (6) is pressed against the rear port of the second flow channel (201) by the sealing ring (7) to achieve a seal and prevent coolant from flowing out from the rear port of the second flow channel (201).

[0083] The rear frame (5) has a rear slot (501) in the area corresponding to the rear port of the first flow channel (101) and a rear slot (502) in the area corresponding to the front port of the second flow channel (201).

[0084] The third slot (501) and the fourth slot (502) accommodate the fastening part (601) of the corresponding plug (6).

[0085] Furthermore, the size of the third slot (501) is larger than the maximum circumferential diameter formed by the fastening part (601) of the plug (6) in order to accommodate the fastening part (601) of the plug (6).

[0086] Preferably, the third slot (501) can be a square slot.

[0087] Furthermore, the size of the fourth slot (502) is larger than the maximum circumferential diameter formed by the fastening part (601) of the plug (6) in order to accommodate the fastening part (601) of the plug (6).

[0088] Preferably, the fourth slot (502) can be a square slot.

[0089] Furthermore, the thickness of the fastening part (601) of the plug (6) is less than or equal to 6 mm, and the effective length of the thread of the threaded part (602) of the plug (6) is within a range of 5 pitches.

[0090] The effective length of the internal threads of the threaded portions of the front and rear ports of the first guide channel (101) and the front and rear ports of the second guide channel (201) is greater than or equal to 5 pitches.

[0091] Furthermore, the first end (802) of the first interface component (8) serves as a threaded portion, with an effective thread length of 5 pitches.

[0092] Furthermore, the thickness of the fastening part (801) of the first interface component (8) is less than or equal to 6 mm.

[0093] Furthermore, the first end (902) of the second interface component (9) serves as a threaded portion, with an effective thread length of 5 pitches.

[0094] Furthermore, the thickness of the fastening part (901) of the second interface component (9) is less than or equal to 6 mm.

[0095] Furthermore, the thickness of the fastening part (601) of the plug (6) is less than or equal to 6 mm, and the effective length of the thread of the threaded part (602) of the plug (6) is within a range of 5 pitches.

[0096] Referring to Figure 7, further, an energy-absorbing structure (302) is provided inside the liquid-cooled base plate, and the energy-absorbing structure (302) is located below the liquid-cooled flow channel (301).

[0097] The energy-absorbing structure (302) is a hollow structure that runs through the left and right sides. When it is impacted at the bottom, it can deform and absorb energy.

[0098] Furthermore, a first weight-reducing structure (303) is provided inside the liquid-cooled base plate (3), which is located below the energy-absorbing structure (302). That is, the liquid-cooled flow channel (301), the energy-absorbing structure (302), and the first weight-reducing structure (303) are distributed from top to bottom in the height direction.

[0099] Specifically, the liquid cooling channel (301) is a first cavity structure arranged in a front-to-back direction and extending through the left and right sides;

[0100] The energy-absorbing structure (302) is a second cavity structure arranged in a front-to-back direction and extending through the left and right sides;

[0101] The first weight reduction structure (303) is a third cavity structure arranged in a front-to-back direction and extending left and right;

[0102] The first cavity structure, the second cavity structure, and the third cavity structure are arranged in a one-to-one correspondence in the vertical direction, and their shapes complement each other.

[0103] The shapes of the first cavity structure, the second cavity structure, and the third cavity structure are matched. For example, the lower half of the first cavity structure is arc-shaped, the cross-section of the third cavity structure is circular, and the second cavity structure is sandwiched between the first cavity structure and the third cavity structure to form a waist shape. The upper arc of the waist shape follows the arc design of the lower half of the first cavity structure, and the lower arc of the waist shape follows the shape of the upper half of the third cavity structure. This top-to-bottom correspondence and shape matching design, as well as the cavity structure design, enhances the energy absorption effect of the battery box while greatly reducing the weight of the battery box. Furthermore, the front frame (4) and the rear frame (5) are each provided with a second weight-reducing structure.

[0104] Furthermore, both the left side beam (1) and the right side beam (2) are equipped with a third weight-reducing structure.

[0105] Specifically, both the second and third weight-reduction structures are hollow structures. By incorporating these hollow structures, the weight of the battery casing is reduced.

[0106] Furthermore, the side of the liquid-cooled base plate (3) is connected to the left side beam (1), the right side beam (2), the front frame (4), and the rear frame (5) by welding.

[0107] The front end of the left side beam (1) is welded to the left end of the front frame (4), and the rear end (also the tail end) of the left side beam (1) is welded to the left end of the rear frame (5).

[0108] The front end of the right side beam (2) is welded to the right end of the front frame (4), and the rear end (also the tail end) of the right side beam (2) is welded to the right end of the rear frame (5).

[0109] Compared to existing technologies where the liquid cooling plate and battery base plate are designed separately and require screwing to fix the liquid cooling plate to the base plate, this invention integrates the liquid cooling plate and battery base plate into one piece. The connection with the frame only requires one welding step, which greatly improves manufacturing efficiency.

[0110] The present invention also provides a power battery pack, including the aforementioned liquid-cooled integrated battery box, wherein the battery cell (10) is placed on the upper surface of the liquid-cooled base plate (3) inside the battery box.

[0111] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A liquid-cooled integrated battery case, characterized by, The integrated battery box is formed by a liquid-cooled base plate, a front frame, a rear frame, a left side beam, and a right side beam, which enclose the cell housing space. The liquid-cooled base plate has a liquid-cooled flow channel that runs from left to right inside, and the upper surface of the liquid-cooled base plate is used to place the battery cell. The liquid-cooled base plate connects the left side beam and the right side beam, and both the left side beam and the right side beam have a through-flow channel. The flow channel of the left side beam is connected to the left port of the liquid cooling channel, and the flow channel of the right side beam is connected to the right port of the liquid cooling channel to form the liquid cooling system of the integrated liquid cooling battery box.

2. The liquid-cooled integrated battery pack of claim 1, wherein, The inner wall of the left side beam is provided with a series of small guide holes arranged in the front-to-back direction to connect the guide channel of the left side beam with the left port of the liquid cooling channel. The inner wall of the right side beam is provided with a series of small guide holes arranged in the front-to-back direction to connect the guide channel of the right side beam with the right port of the liquid cooling channel.

3. The liquid-cooled integrated battery pack of claim 1, wherein, Front slots are provided in the areas corresponding to the front ports of the flow channels of the front frame, the left side beam, and the right side beam. An interface component passes through each of the front slots. The first end of the interface component is connected to the front port of the corresponding flow channel, and the second end of the interface component is used to connect to an external water pipe.

4. The liquid-cooled integrated battery pack of claim 1, wherein, The rear frame and the area corresponding to the rear port of the flow channel of the left and right side beams are all provided with rear slots. The rear ports of the flow channels of the left and right side beams are each blocked by the first end of a plug, and the second end of the plug is accommodated in the corresponding rear slot.

5. The liquid-cooled integrated battery pack of claim 1, wherein, The liquid-cooled base plate is equipped with an energy-absorbing structure. The energy-absorbing structure is located below the liquid-cooled flow channel.

6. The liquid-cooled integrated battery pack of claim 5, wherein, The liquid-cooled base plate is also provided with a first weight-reduction structure, which is located below the energy-absorbing structure.

7. The liquid-cooled integrated battery housing as described in claim 6, characterized in that, The liquid cooling channel is a first cavity structure arranged in a front-to-back direction and extending left and right; The energy-absorbing structure is a second cavity structure with a row of front-to-back arranged and open to the left and right. The first weight reduction structure is a third cavity structure arranged in a front-to-back direction and extending left and right; The first cavity structure, the second cavity structure, and the third cavity structure are arranged in a one-to-one correspondence in the vertical direction, and their shapes complement each other.

8. The liquid-cooled integrated battery pack of claim 1, wherein, Both the front frame and the rear frame are equipped with a second weight-reduction structure inside.

9. The liquid-cooled integrated battery pack of claim 1, wherein, Both the left and right side beams are equipped with a third weight-reduction structure.

10. A power battery pack, characterized in that, The battery housing includes the liquid-cooled integrated battery housing as described in any one of claims 1-9, wherein the battery cells are placed on the upper surface of the liquid-cooled base plate inside the battery housing.

Images