Double-layer liquid cooling battery cell module for battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a double-layer liquid-cooled battery cell module for a battery pack, which comprises an upper-layer battery cell module and a lower-layer battery cell module which are longitudinally stacked, the upper-layer battery cell module comprises an upper-layer battery cell module frame and an upper-layer battery cell liquid-cooled plate which are mutually connected, and the lower-layer battery cell module comprises a lower-layer battery cell liquid-cooled plate and a lower-layer battery cell liquid-cooled plate which are mutually connected. The lower-layer battery cell module comprises a lower-layer battery cell module frame body and a lower-layer battery cell liquid cooling plate which are connected with each other; a cooling liquid circulating assembly is arranged on the same side of the upper-layer battery cell liquid cooling plate and the lower-layer battery cell liquid cooling plate; terminal embedding grooves are formed in the upper-layer battery cell module frame body and the lower-layer battery cell module frame body and are used for embedding terminals, so that the battery cell modules are connected in series and connected with an external high-voltage box conveniently. The double-layer liquid cooling battery cell module provided by the scheme not only can meet the horizontal and longitudinal stacking of the battery cell modules, but also is convenient to connect in series, has a liquid cooling function, occupies a small external space, and can effectively improve the assembly efficiency of a battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a double-layer liquid-cooled cell module for battery packs. Background Technology

[0002] Currently, new energy vehicles have received widespread attention from all sectors of society due to their excellent environmental performance, and the requirements for them are constantly increasing. As a type of new energy vehicle, electric vehicles are also developing towards higher safety, higher energy density, and lighter weight. The main factor determining the driving range of an electric vehicle is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet driving requirements.

[0003] Battery packs used in electric vehicles typically consist of multiple cell modules. These modules are stacked within the same housing and then connected to each other. The core cell module is configured with a specific number of cells to meet the required output voltage, and all the cells are then connected together to output the voltage.

[0004] The placement of the aforementioned battery cell modules is limited by the vehicle's reserved space, and can be done in two ways: horizontal placement and vertical placement. Horizontal placement has lower requirements for the height of the vehicle's reserved space, while vertical placement has lower requirements for the width of the vehicle's reserved space. To achieve the best power output, the optimal combination is a combination of horizontal and vertical placement.

[0005] In existing technologies, electrical connections for horizontally or vertically stacked battery cell modules typically employ direct wiring harness connections. This method requires highly manual operation, and the numerous harnesses create clutter within the battery pack housing. Furthermore, battery cell modules often generate significant heat during operation, and prolonged exposure to high temperatures can cause the harnesses to age, thus impacting the battery pack's lifespan. Traditional cooling methods generally involve integrating a thermal management system directly into the battery pack housing. However, since this system exists independently of other battery pack components, it not only occupies internal space but also presents cumbersome assembly and maintenance challenges.

[0006] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to overcome the problems of the prior art and provide a double-layer liquid-cooled cell module for battery packs. This module solves the problems of space occupation by wiring harnesses during horizontal and vertical stacking of cell modules in traditional technologies, high requirements for manual operation, and easy aging under long-term high-temperature environments. It also addresses the technical problems of existing heat dissipation methods for cell modules occupying internal space of the battery pack and being cumbersome to assemble.

[0008] The above objectives are achieved through the following technical solutions:

[0009] A dual-layer liquid-cooled cell module for a battery pack includes a vertically stacked upper cell module and a lower cell module. The upper cell module includes an interconnected upper cell module frame and an upper cell liquid cooling plate. The lower cell module includes an interconnected lower cell module frame and a lower cell liquid cooling plate. A coolant circulation assembly is disposed on the same side of the upper and lower cell liquid cooling plates. The upper cell module frame includes symmetrically arranged upper front-end plates and upper rear-end plates. Upper side beams are symmetrically arranged between the upper front-end plate and the upper rear-end plate, and an upper partition is arranged between the two upper side beams to form an upper first mounting cavity and an upper second mounting cavity; the upper front-end plate is provided with an upper first terminal and an upper second terminal corresponding to the upper first mounting cavity and the upper second mounting cavity, and the upper rear-end plate is provided with an upper third terminal and an upper fourth terminal corresponding to the upper first mounting cavity and the upper second mounting cavity; the lower cell module frame is packaged. The device includes a symmetrically arranged lower front-end plate and a lower rear-end plate. Lower side beams are symmetrically arranged between the lower front-end plate and the lower rear-end plate, and a lower partition is arranged between the two lower side beams, forming a lower first mounting cavity and a lower second mounting cavity. The lower front-end plate has a lower first terminal and a lower second terminal corresponding to the lower first mounting cavity and the lower second mounting cavity, respectively. The lower rear-end plate has a lower third terminal and a lower fourth terminal corresponding to the lower first mounting cavity and the lower second mounting cavity, respectively. The upper first terminal and the lower first terminal are respectively connected to a fuse via copper busbars. The upper second terminal and the lower second terminal are respectively connected to a high-voltage box module via copper busbars. The upper third terminal and the lower fourth terminal are connected via copper busbars, and the upper fourth terminal and the lower third terminal are connected via copper busbars. Battery cell modules are installed in the upper first mounting cavity, the upper second mounting cavity, the lower first mounting cavity, and the lower second mounting cavity, respectively.

[0010] Furthermore, the coolant circulation assembly includes an upper inlet pipe disposed on the upper liquid cooling inlet port of the upper cell liquid cooling plate, a lower inlet pipe disposed on the lower liquid cooling inlet port of the lower cell liquid cooling plate, an upper outlet pipe disposed on the upper liquid cooling outlet port of the upper cell liquid cooling plate, and a lower outlet pipe disposed on the lower liquid cooling outlet port of the lower cell liquid cooling plate; the upper inlet pipe and the lower inlet pipe are connected to the main inlet pipe via a three-way inlet connector, and the upper outlet pipe and the lower outlet pipe are connected to the main outlet pipe via a three-way outlet connector.

[0011] Furthermore, the upper front-end board, the upper rear-end board, the lower front-end board, and the lower rear-end board are of the same specifications and all have screw through holes. The upper cell liquid cooling plate and the lower cell liquid cooling plate each have liquid cooling plate connection holes corresponding to the screw through holes. The screw with a nut passes through the screw through holes and the liquid cooling plate connection holes respectively, so as to connect the upper cell module and the lower cell module in series.

[0012] Furthermore, the upper front-end board, the upper rear-end board, the lower front-end board, and the lower rear-end board have the same specifications and are all provided with terminal slots for embedding the upper first terminal, the upper second terminal, the upper third terminal, the upper fourth terminal, the lower first terminal, the lower second terminal, the lower third terminal, and the lower fourth terminal.

[0013] Furthermore, the upper first terminal, the upper second terminal, the upper third terminal, the upper fourth terminal, the lower first terminal, the lower second terminal, the lower third terminal, and the lower fourth terminal have the same specifications, and each includes a terminal holder that matches the terminal slot. The terminal holder is fitted with a nut, and the nut is provided with a corresponding locking bolt with a pressure plate.

[0014] Furthermore, the terminal block is provided with a matching terminal insulating cover, which is snap-fitted to the terminal block.

[0015] Furthermore, the terminal block includes a pair of ear plates with slots formed on the ear plates; correspondingly, the terminal insulating cover includes a pair of locking feet. Beneficial effects

[0016] This invention provides a double-layer liquid-cooled cell module for battery packs. It utilizes a longitudinal series connection to quickly connect two vertically stacked cell modules. By designing the base plate of each cell module as a liquid-cooled plate and employing a single coolant circulation assembly for synchronous liquid cooling, this design not only saves internal battery pack space but also facilitates assembly. Terminal slots and terminals corresponding to the cell modules are provided on each end plate, and electrical connections are made via copper busbars. This method is simpler and more convenient than traditional wiring harness connections, while also saving space. The double-layer liquid-cooled cell module provided by this solution not only accommodates both horizontal and vertical cell module stacking but also allows for convenient series connection, provides liquid cooling, occupies minimal external space, and effectively improves battery pack assembly efficiency. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a double-layer liquid-cooled cell module for a battery pack according to the present invention;

[0018] Figure 2 This is an exploded view of a double-layer liquid-cooled cell module for a battery pack according to the present invention.

[0019] Figure 3 This is a schematic diagram of the front end of a double-layer liquid-cooled cell module for a battery pack according to the present invention.

[0020] Figure 4 This is a schematic diagram of the rear end of a double-layer liquid-cooled cell module for a battery pack according to the present invention.

[0021] Figure 5 This is a schematic diagram of the frame and liquid cooling plate assembly of a double-layer liquid-cooled cell module for a battery pack according to the present invention.

[0022] Figure 6 This is a schematic diagram of the terminal slot structure in a double-layer liquid-cooled cell module for a battery pack according to the present invention;

[0023] Figure 7 This is a schematic diagram showing the connection between the terminals and the copper busbar and aluminum busbar in a double-layer liquid-cooled cell module for a battery pack according to the present invention.

[0024] Figure 8 This is an exploded view of the terminals in a double-layer liquid-cooled cell module for a battery pack according to the present invention.

[0025] Illustration markings:

[0026] 1-Upper cell module, 101-Upper cell module frame, 102-Upper cell liquid cooling plate, 103-Upper liquid cooling inlet, 104-Upper liquid cooling outlet, 105-Upper front end plate, 106-Upper rear end plate, 107-Upper side beam plate, 108-Upper side partition, 109-Upper first mounting cavity, 110-Upper second mounting cavity, 111-Upper first terminal, 112-Upper second terminal, 113-Upper third terminal, 114-Upper fourth terminal;

[0027] 2-Lower layer cell module, 201-Lower layer cell module frame, 202-Lower layer cell liquid cooling plate, 203-Lower layer liquid cooling inlet interface, 204-Lower layer liquid cooling outlet interface, 205-Lower layer front end plate, 206-Lower layer rear end plate, 207-Lower layer side beam plate, 208-Lower side partition, 209-Lower layer first mounting cavity, 210-Lower layer second mounting cavity, 211-Lower layer first terminal, 212-Lower layer second terminal, 213-Lower layer third terminal, 214-Lower layer fourth terminal;

[0028] 3-Coolant circulation assembly, 301-Upper inlet pipe, 302-Upper outlet pipe, 303-Lower inlet pipe, 304-Lower outlet pipe, 305-T-connector for inlet, 306-T-connector for outlet, 307-Main inlet pipe, 308-Main outlet pipe;

[0029] 4-Battery cell module;

[0030] 5- Copper busbar;

[0031] 6-Al-bar;

[0032] 7-Fuse;

[0033] 8-Screw through hole;

[0034] 9-Liquid cooling plate connection hole;

[0035] 10-Screw;

[0036] 11-Terminal embedding slot;

[0037] 12-Terminal base;

[0038] 13-Nut;

[0039] 14-Locking bolt;

[0040] 15-Terminal insulating cover;

[0041] 16- Tableting;

[0042] 17-Earplate;

[0043] 18-Card slot;

[0044] 19-Foot clamp. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] like Figures 1-5 As shown, this solution provides a dual-layer liquid-cooled cell module module for a battery pack, including an upper cell module 1 and a lower cell module 2 stacked vertically. The upper cell module 1 includes an upper cell module frame 101 and an upper cell liquid cooling plate 102 connected to each other, and the lower cell module 2 includes a lower cell module frame 201 and a lower cell liquid cooling plate 202 connected to each other.

[0047] A coolant circulation assembly 3 is provided on the same side of the upper cell liquid cooling plate 102 and the lower cell liquid cooling plate 202, which is used to simultaneously provide circulating coolant to the upper cell liquid cooling plate 102 and the lower cell liquid cooling plate 202, so as to achieve cooling and heat dissipation of the cell module 4 placed on the upper cell liquid cooling plate 102 and the lower cell liquid cooling plate 202;

[0048] The upper battery cell module frame 101 includes an upper front-end plate 105 and an upper rear-end plate 106 symmetrically arranged. Upper side beams 107 are symmetrically arranged between the upper front-end plate 105 and the upper rear-end plate 106, and an upper partition 108 is arranged between the two upper side beams 107 to form an upper first mounting cavity 109 and an upper second mounting cavity 110. The upper front-end plate 105 is provided with an upper first terminal 111 and an upper second terminal 112 corresponding to the upper first mounting cavity 109 and the upper second mounting cavity 110. The upper rear-end plate 106 is provided with an upper third terminal 113 and an upper fourth terminal 114 corresponding to the upper first mounting cavity 109 and the upper second mounting cavity 110.

[0049] The lower cell module frame 201 includes a symmetrically arranged lower front plate 205 and a lower rear plate 206. Lower side beams 207 are symmetrically arranged between the lower front plate 205 and the lower rear plate 206, and a lower partition 208 is arranged between the two lower side beams 207 to form a lower first mounting cavity 209 and a lower second mounting cavity 210. The lower front plate 205 is provided with a lower first terminal 211 and a lower second terminal 212 corresponding to the lower first mounting cavity 209 and the lower second mounting cavity 210. The lower rear plate 206 is provided with a lower third terminal 213 and a lower fourth terminal 214 corresponding to the lower first mounting cavity 209 and the lower second mounting cavity 210.

[0050] The upper first terminal 111 and the lower first terminal 211 are respectively connected to the fuse 7 via copper busbar 5. The upper second terminal 112 and the lower second terminal 212 are respectively connected to the high voltage box module via copper busbar 5. The upper third terminal 113 and the lower fourth terminal 214 are connected via copper busbar 5. The upper fourth terminal 114 and the lower third terminal 213 are connected via copper busbar 5.

[0051] Battery cell modules 4 are respectively installed in the upper first mounting cavity 109, the upper second mounting cavity 110, the lower first mounting cavity 209 and the lower second mounting cavity 210, and each battery cell module 4 is electrically connected to its corresponding terminal.

[0052] This embodiment uses the above structure to connect the two upper-layer battery cell modules 4 and the two lower-layer battery cell modules 4 in series. Thus, the four battery cell modules 4 can be quickly connected in series by simply connecting them through the copper busbars 5 on the terminals. It also facilitates quick connection with the outer high-voltage box module, thereby facilitating the monitoring of each battery cell module 4.

[0053] like Figure 1 and Figure 2 As shown, the coolant circulation assembly 3 in this embodiment includes an upper inlet pipe 301 disposed on the upper liquid cooling inlet port 103 of the upper battery cell liquid cooling plate 102, a lower inlet pipe 303 disposed on the lower liquid cooling inlet port 203 of the lower battery cell liquid cooling plate 202, an upper outlet pipe 302 disposed on the upper liquid cooling outlet port 104 of the upper battery cell liquid cooling plate 102, and a lower outlet pipe 304 disposed on the lower liquid cooling outlet port 204 of the lower battery cell liquid cooling plate 202; the upper inlet pipe 301 and the lower inlet pipe 303 are connected to the main inlet pipe 307 through a three-way inlet connector 305, and the upper outlet pipe 302 and the lower outlet pipe 304 are connected to the main outlet pipe 308 through a three-way outlet connector 306.

[0054] In this embodiment, by connecting the external coolant circulation device to the inlet pipe 307 and the outlet pipe 308 respectively, the purpose of simultaneously providing coolant to the upper cell liquid cooling plate 102 and the lower cell liquid cooling plate 202 is achieved.

[0055] In this embodiment, both the upper cell liquid cooling plate 102 and the lower cell liquid cooling plate 202 are provided with liquid cooling channels for coolant flow. Each liquid cooling channel has two connection ports, which are respectively connected to their respective liquid inlet and liquid outlet ports. Under the action of an external coolant circulation device, a liquid cooling circulation is formed inside the liquid cooling plate, thereby dissipating heat for the cell modules placed on its surface.

[0056] like Figure 5 As shown, in this embodiment, the upper front-end plate 105, the upper rear-end plate 106, the lower front-end plate 205, and the lower rear-end plate 206 are of the same specifications and are all provided with screw through holes 8. The upper cell liquid cooling plate 102 and the lower cell liquid cooling plate 202 are respectively provided with liquid cooling plate connection holes 9 corresponding to the screw through holes 8. The screw 10 with a nut passes through the screw through holes 8 and the liquid cooling plate connection holes 9 respectively, so as to realize the series connection of the upper cell module 1 and the lower cell module 2.

[0057] By using the aforementioned screw series connection method, the lower cell liquid cooling plate 202, the lower cell module frame 201, the upper cell liquid cooling plate 102, and the upper cell module frame 101 are stacked from bottom to top, and then the screws 10 are directly connected from top to bottom, which can effectively improve the assembly efficiency of this double-layer battery pack.

[0058] like Figure 6 and Figure 7 As shown, in this embodiment, the upper front-end plate 105, the upper rear-end plate 106, the lower front-end plate 205, and the lower rear-end plate 206 are of the same specifications and all have terminal slots 11 for embedding the upper first terminal 111, the upper second terminal 112, the upper third terminal 113, the upper fourth terminal 114, the lower first terminal 211, the lower second terminal 212, the lower third terminal 213, and the lower fourth terminal 214. Through the terminal slots 11, the upper first terminal 111, the upper second terminal 112, the upper third terminal 113, the upper fourth terminal 114, the lower first terminal 211, the lower second terminal 212, the lower third terminal 213, and the lower fourth terminal 214 can be installed in a concealed manner. Each terminal is used to tighten the connection between the aluminum busbar 6 and the external copper busbar 5 on its corresponding cell module 4.

[0059] like Figure 8 As shown, specifically, the upper first terminal 111, the upper second terminal 112, the upper third terminal 113, the upper fourth terminal 114, the lower first terminal 211, the lower second terminal 212, the lower third terminal 213, and the lower fourth terminal 214 have the same specifications, all including a terminal seat 12 that matches the terminal slot 11. A nut 13 is embedded in the terminal seat 12, and a corresponding locking bolt 14 with a pressure plate 16 is provided on the nut 13. The pressure plate 16 and the nut 13 form a locking space. By connecting the aluminum bar 6 and the copper busbar 5 to the locking bolt 14 respectively, and then tightening the locking bolt 14, the copper busbar 5 and the aluminum bar 6 are firmly pressed into the locking space.

[0060] As an optimization of this embodiment, a matching terminal insulating cover 15 is provided on the terminal base 12. The terminal insulating cover 15 is snapped together with the terminal base 12, thereby concealing and protecting the nut 13, the locking bolt 14, and the pressure plate 16, preventing them from being interfered with by the external environment, and ensuring the stability of the terminal connection.

[0061] As a further optimization of this embodiment, the terminal block 12 includes a pair of ear plates 17, and the ear plates 17 are provided with slots 18; correspondingly, the terminal insulating cover 15 includes a pair of locking feet 19, and the terminal insulating cover 15 is connected to the terminal block 12 by the locking feet 19 and the slots 18.

[0062] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-layer liquid-cooled cell module for a battery pack, characterized in that, It includes an upper battery cell module (1) and a lower battery cell module (2) stacked vertically. The upper battery cell module (1) includes an upper battery cell module frame (101) and an upper battery cell liquid cooling plate (102) connected to each other. The lower battery cell module (2) includes a lower battery cell module frame (201) and a lower battery cell liquid cooling plate (202) connected to each other. Cooling liquid circulation assembly (3) is provided on the same side of the upper cell liquid cooling plate (102) and the lower cell liquid cooling plate (202). The upper battery cell module frame (101) includes an upper front plate (105) and an upper rear plate (106) arranged symmetrically. Upper side beams (107) are symmetrically arranged between the upper front plate (105) and the upper rear plate (106), and an upper partition (108) is arranged between the two upper side beams (107) to form an upper first mounting cavity (109) and an upper second mounting cavity (110). The upper front plate (105) is provided with an upper first terminal (111) and an upper second terminal (112) corresponding to the upper first mounting cavity (109) and the upper second mounting cavity (110). The upper rear plate (106) is provided with an upper third terminal (113) and an upper fourth terminal (114) corresponding to the upper first mounting cavity (109) and the upper second mounting cavity (110). The lower cell module frame (201) includes a lower front end plate (205) and a lower rear end plate (206) arranged symmetrically. Lower side beam plates (207) are symmetrically arranged between the lower front end plate (205) and the lower rear end plate (206), and a lower side partition plate (208) is arranged between the two lower side beam plates (207) to form a lower first mounting cavity (209) and a lower second mounting cavity (210). The lower front end plate (205) is provided with a lower first terminal (211) and a lower second terminal (212) corresponding to the lower first mounting cavity (209) and the lower second mounting cavity (210). The lower rear end plate (206) is provided with a lower third terminal (213) and a lower fourth terminal (214) corresponding to the lower first mounting cavity (209) and the lower second mounting cavity (210). The upper first terminal (111) and the lower first terminal (211) are respectively connected to the fuse (7) through copper busbar (5), the upper second terminal (112) and the lower second terminal (212) are respectively connected to the high voltage box module through copper busbar (5), the upper third terminal (113) and the lower fourth terminal (214) are connected through copper busbar (5), and the upper fourth terminal (114) and the lower third terminal (213) are connected through copper busbar (5); Battery cell modules (4) are respectively installed in the upper first mounting cavity (109), the upper second mounting cavity (110), the lower first mounting cavity (209), and the lower second mounting cavity (210).

2. The double-layer liquid-cooled cell module for a battery pack according to claim 1, characterized in that, The coolant circulation assembly (3) includes an upper inlet pipe (301) disposed on the upper liquid cooling inlet port (103) of the upper battery cell liquid cooling plate (102), a lower inlet pipe (303) disposed on the lower liquid cooling inlet port (203) of the lower battery cell liquid cooling plate (202), an upper outlet pipe (302) disposed on the upper liquid cooling outlet port (104) of the upper battery cell liquid cooling plate (102), and a coolant circulation assembly (3) comprising an upper inlet pipe (301) disposed on the upper liquid cooling inlet port (103) of the upper battery cell liquid cooling plate (102), and a coolant circulation assembly (303) comprising an upper inlet pipe (301) disposed on the upper liquid cooling inlet port (103) of the lower battery cell liquid cooling plate (202), an upper outlet pipe (302) disposed on the upper liquid cooling outlet port (104) of the upper battery cell liquid cooling plate (102), and a coolant circulation assembly (303) comprising a lower inlet pipe (303) disposed on the lower liquid cooling inlet port (203) of the lower battery cell liquid cooling plate (202), and a coolant circulation assembly (303) comprising a lower inlet pipe (303) disposed on the upper liquid cooling inlet port (103) of the upper battery cell liquid cooling plate (102), and a coolant circulation assembly (303) comprising a lower inlet pipe (303) disposed on the lower liquid cooling inlet port (203) of the lower battery cell liquid cooling plate (202), and a coolant circulation assembly (303) disposed on the upper liquid cooling inlet port (104) of the upper battery cell liquid cooling plate (102), and a coolant circulation assembly (303) disposed on the upper liquid cooling inlet port (103) of the upper battery cell liquid cooling plate (102), and a coolant circulation assembly (303) disposed on the upper liquid cooling inlet port (103) of the lower battery cell liquid cooling plate (202), and The lower liquid outlet pipe (304) is located on the lower liquid outlet interface (204) of the lower cell liquid cooling plate (202); the upper liquid inlet pipe (301) and the lower liquid inlet pipe (303) are connected to the liquid inlet main pipe (307) through a three-way liquid inlet connector (305), and the upper liquid outlet pipe (302) and the lower liquid outlet pipe (304) are connected to the liquid outlet main pipe (308) through a three-way liquid outlet connector (306).

3. A double-layer liquid-cooled cell module for a battery pack according to claim 1, characterized in that, The upper front-end plate (105), the upper rear-end plate (106), the lower front-end plate (205), and the lower rear-end plate (206) are of the same specifications and are all provided with screw through holes (8). The upper battery cell liquid cooling plate (102) and the lower battery cell liquid cooling plate (202) are respectively provided with liquid cooling plate connection holes (9) corresponding to the screw through holes (8). The screw (10) with the nut passes through the screw through holes (8) and the liquid cooling plate connection holes (9) respectively, so as to realize the series connection of the upper battery cell module (1) and the lower battery cell module (2).

4. A double-layer liquid-cooled cell module for a battery pack according to claim 1, characterized in that, The upper front-end plate (105), the upper rear-end plate (106), the lower front-end plate (205), and the lower rear-end plate (206) are of the same specifications and are all provided with terminal slots (11) for embedding the upper first terminal (111), the upper second terminal (112), the upper third terminal (113), the upper fourth terminal (114), the lower first terminal (211), the lower second terminal (212), the lower third terminal (213), and the lower fourth terminal (214).

5. A double-layer liquid-cooled cell module for a battery pack according to claim 4, characterized in that, The upper first terminal (111), the upper second terminal (112), the upper third terminal (113), the upper fourth terminal (114), the lower first terminal (211), the lower second terminal (212), the lower third terminal (213), and the lower fourth terminal (214) have the same specifications and all include a terminal seat (12) that matches the terminal slot (11). The terminal seat (12) is fitted with a nut (13), and the nut (13) is provided with a corresponding locking bolt (14) with a pressure plate (16).

6. A double-layer liquid-cooled cell module for a battery pack according to claim 5, characterized in that, The terminal block (12) is provided with a matching terminal insulating cover (15), which is snapped into the terminal block (12).

7. A double-layer liquid-cooled cell module for a battery pack according to claim 6, characterized in that, The terminal block (12) includes a pair of ear plates (17), and the ear plates (17) are provided with slots (18); correspondingly, the terminal insulating cover (15) includes a pair of locking feet (19).

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