Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack, the battery module comprises a battery cell assembly, an end plate, an insulating plate and a protection component, the battery module comprises a battery cell assembly body, an end plate, an insulating plate and a protection component, the battery cell assembly body comprises a plurality of battery cells arranged in sequence, and foam is arranged between every two adjacent battery cells; end plates are arranged at the two ends of the battery cell assembly in the arrangement direction of the battery cells; the insulating plate is arranged on the side, provided with the anti-explosion valve, of the battery cell, and a through hole is formed in the position, corresponding to the anti-explosion valve, of the insulating plate; the protective component is arranged on one side, deviating from the battery cells, of the insulating plate and extends along the arrangement direction of the battery cells, and at least one end of the protective component is connected with the end plate; a containing cavity, an inlet and an outlet are formed in the protection component, and the inlet corresponds to and communicates with the through hole. Therefore, the protective component can block the electrolyte and prevent the electrolyte from being sprayed onto the aluminum row, so that short circuit cannot be caused, and the safety and the reliability of the battery pack are improved.

Description

Technical Field

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

[0002] At present, battery modules are made up of multiple stacked battery cells, each of which is equipped with an explosion-proof valve. When a battery cell experiences thermal runaway, the explosion-proof valve will open, thereby quickly discharging high-temperature and high-pressure gas. However, as the high-temperature and high-pressure gas is discharged, the electrolyte in the battery cell will also be sprayed out and onto the aluminum bus used to connect the battery cell poles, causing a short circuit and reducing the safety and reliability of the battery pack. Utility Model Content

[0003] The purpose of this application is to provide a battery module and a battery pack, which to a certain extent solves the technical problem in the prior art that when the explosion-proof valve of the battery cell is opened to exhaust, the electrolyte in the battery cell will also be sprayed out and sprayed onto the aluminum busbar, thereby causing a short circuit and reducing the safety and reliability of the battery pack.

[0004] The present application provides a battery module, comprising: a cell assembly, an end plate, an insulating plate, and a protective member; wherein the battery module comprises a cell assembly, an end plate, an insulating plate, and a protective member; wherein the cell assembly comprises a plurality of cells arranged in sequence, and foam is provided between any two adjacent cells; along the arrangement direction of the cells, the end plates are respectively provided at both ends of the cell assembly;

[0005] The insulating plate is arranged on the side of the battery cell where the explosion-proof valve is provided, and a through hole is formed on the insulating plate corresponding to the explosion-proof valve; the protective member is arranged on the side of the insulating plate away from the battery cell, and the protective member extends along the arrangement direction of the battery cell, and at least one end of the protective member is connected to the end plate; the protective member is formed with a accommodating cavity and an inlet and an outlet connected to the accommodating cavity, and the inlet corresponds to and is connected to the through hole one by one.

[0006] In the above technical solution, further, along the arrangement direction of the battery cells, the outlet is formed on at least one end of the protective component.

[0007] In any of the above technical solutions, further, the protective component and the end plate are detachably connected via a first fastening component.

[0008] In any of the above technical solutions, further, the protective component includes a main body and a first connecting portion that are connected to each other; wherein, the main body is formed with the accommodating cavity and the inlet and outlet connected to the accommodating cavity; along the arrangement direction of the battery cells, at least one end of the main body is provided with the connecting portion; the first connecting portion is connected to the corresponding end plate.

[0009] In any of the above technical solutions, further, the protective component also includes a second connecting portion connected to the main body, and the second connecting portion is detachably connected to the insulating plate via a second fastening component.

[0010] In any of the above technical solutions, further, an avoidance groove is formed on the top of the end plate along its height direction.

[0011] In any of the above technical solutions, further, the battery module also includes a strap, and is used to fix the battery cell assembly and the end plate.

[0012] The present application also provides a battery pack, including the battery module described in any of the above technical solutions, and thus has all the beneficial technical effects of the battery module, which will not be repeated here.

[0013] In the above technical solution, further, the battery pack also includes a box cover and a liquid cooling plate; wherein, the battery module is arranged on the upper surface of the liquid cooling plate, and the end plate of the battery module is connected to the liquid cooling plate; the box cover covers the liquid cooling plate and is connected to the liquid cooling plate.

[0014] In any of the above technical solutions, further, a positioning groove is formed at the bottom of the end plate along the height direction thereof, and a positioning protrusion is formed on the liquid cooling plate, and the positioning protrusion is inserted into the positioning groove.

[0015] In any of the above technical solutions, further, the end plate of the battery module and the liquid cooling plate are detachably connected via a third fastening member.

[0016] In any of the above technical solutions, further, the liquid cooling plate is formed with an auxiliary connection portion extending toward the outside thereof and used for connecting to a target site.

[0017] In any of the above technical solutions, further, the battery pack also includes an insulating seat, a support seat and a lead-out row; wherein, the support seat is arranged on the liquid cooling plate, and the support seat is formed with support grooves with openings on both sides and the top, the lead-out row is installed in the support groove, and the lead-out row is connected to a total output electrode of the battery module; the insulating seat is fixed on the end plate of the battery module, and the lead-out row is detachably connected to the insulating seat.

[0018] In any of the above technical solutions, further, the battery pack also includes side beams, the number of which is at least three, and which respectively abut against at least three sides of the battery module; the side beams are U-shaped and are detachably connected to the liquid cooling plate via a fourth fastening member; and the two side beams arranged on opposite sides of the battery module are both formed with lifting ears.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The battery module provided by the present application, when a battery cell fails, a large amount of gas is generated inside the battery cell, which causes the explosion-proof valve to open for exhaust. The explosion-proof valve will spray out a large amount of electrolyte, which directly enters the accommodating cavity of the protective component, so that the electrolyte will not be sprayed onto the aluminum bus, that is, it will not cause a short circuit. In addition, openings are formed on both sides of the protective component, which does not affect the exhaust, further improving the safety and reliability of the battery pack. In addition, a structure for blocking the electrolyte is designed on the outside of the battery cell, which reduces the design difficulty of the battery cell compared to setting a blocking structure inside the battery cell, and will not affect the internal structure of the battery cell, thereby ensuring the performance of the battery cell and avoiding occupying the space inside the battery cell, which helps to improve the energy density of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 An exploded view of a battery module provided in an embodiment of the present application;

[0023] Figure 2 An assembly diagram of a battery module provided in an embodiment of the present application;

[0024] Figure 3 Another assembly diagram of the battery module provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of the protective component provided in an embodiment of the present application;

[0026] Figure 5 Another structural schematic diagram of the protective component provided in an embodiment of the present application;

[0027] Figure 6 An exploded view of a battery pack provided in an embodiment of the present application;

[0028] Figure 7 An assembly diagram of a battery pack provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of the structure of the liquid cooling plate provided in an embodiment of the present application;

[0030] Figure 9 A schematic diagram of an opened battery pack provided in an embodiment of the present application;

[0031] Figure 10 for Figure 9 Schematic diagram of the enlarged structure at A;

[0032] Figure 11 Another schematic diagram of an opened battery pack provided in an embodiment of the present application;

[0033] Figure 12 for Figure 11 Schematic diagram of the local enlarged structure.

[0034] Reference numerals:

[0035] 1-battery cell assembly, 2-end plate, 21-avoidance groove, 22-positioning groove, 3-insulating plate, 31-through hole, 4-protective member, 41-body, 42-first connecting part, 421-first auxiliary mounting through hole, 43-second connecting part, 431-second auxiliary mounting through hole, 44-inlet, 45-outlet, 5-binding strap, 6-third fastening member, 7-top foam, 10-battery module, 20-tank cover, 30-liquid cooling plate, 301-positioning protrusion, 302-auxiliary connecting part, 40-insulating seat, 50-support seat, 501-support groove, 60-lead out row, 70-battery management module, 80-side beam, 801-lifting ear, 90-fourth fastening member. DETAILED DESCRIPTION

[0036] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0037] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0041] Refer to the following Figures 1 to 12 The battery module and battery pack according to some embodiments of the present application are described.

[0042] Example 1

[0043] See also Figures 1 to 5 As shown, an embodiment of the present application provides a battery module 10, comprising: a cell assembly 1, an end plate 2, an insulating plate 3, and a protective member 4; wherein the battery module 10 comprises a cell assembly, an end plate 2, an insulating plate 3, and a protective member 4; wherein the cell assembly comprises a plurality of cells arranged in sequence, and foam is provided between any two adjacent cells; along the arrangement direction of the cells, end plates 2 are provided at both ends of the cell assembly 1;

[0044] The insulating plate 3 is arranged on the side of the battery cell where the explosion-proof valve is provided, and a through hole 31 is formed on the insulating plate 3 corresponding to the explosion-proof valve; the protective member 4 is arranged on the side of the insulating plate 3 away from the battery cell, and the protective member 4 extends along the arrangement direction of the battery cell, and at least one end of the protective member 4 is connected to the end plate 2; the protective member 4 is formed with an accommodating cavity and an inlet 44 and an outlet 45 connected to the accommodating cavity, and the inlet 44 corresponds to the through hole 31 one by one and is connected.

[0045] According to the structure described above, when a battery cell fails, a large amount of gas is generated inside the battery cell, causing the explosion-proof valve to open and exhaust. The explosion-proof valve will spray out a large amount of electrolyte, and the sprayed electrolyte directly enters the accommodating cavity of the protective component 4, so that the electrolyte will not be sprayed onto the aluminum bus, that is, it will not cause a short circuit, further improving the safety and reliability of the battery pack. Moreover, the structure for blocking the electrolyte designed on the outside of the battery cell reduces the design difficulty of the battery cell compared to setting a blocking structure inside the battery cell, and will not affect the internal structure of the battery cell, thereby ensuring the performance of the battery cell and avoiding occupying the space inside the battery cell, which helps to improve the energy density of the battery cell.

[0046] It should be noted that the number of the through holes 31 and the number of the inlets 44 are both plural, and are in a one-to-one correspondence with the plurality of explosion-proof valves.

[0047] In this embodiment, preferably, Figure 4 and Figure 5 As shown, outlets 45 are formed at both ends of the protective member 4 along the arrangement direction of the battery cells.

[0048] According to the structure described above, outlets 45 are provided at both ends of the protective member 4, so that the electrolyte is retained in the accommodating cavity of the protective member 4, and the gas discharged from the battery cell can be discharged from the outlets 45 at the ends. In other words, normal exhaust can be ensured and the electrolyte can be prevented from being sprayed onto the aluminum busbar.

[0049] It should be noted that the outlets 45 are not limited to being formed along the arrangement direction of the battery cells as described above, and are formed at both ends of the protective member 4 . The outlet 45 may also be formed at only one end of the protective member 4 , depending on actual needs.

[0050] In addition, it should be noted that: the outlet 45 is not limited to the above-mentioned arrangement direction of the battery cells, and is set at at least one end of the protective component 4. The outlet 45 can also be set in the area near both ends of the protective component 4, that is, the outlet 45 can be set on the side wall of the protective component 4 close to the explosion-proof valve or on the side wall away from the explosion-proof valve, depending on actual needs. Of course, it is not limited to this. The outlet 45 can also be arranged along the entire length direction of the protective component 4, and when the outlet 45 is set on the side wall of the protective component 4 away from the explosion-proof valve, the size of the outlet 45 is made smaller, which can reduce the spraying of the electrolyte and ensure normal exhaust.

[0051] In this embodiment, preferably, Figure 2 As shown, the protective member 4 is detachably connected to the end plate 2 via a first fastening member (the first fastening member is not shown in the figure).

[0052] According to the structure described above, the protective member 4 and the end plate 2 are detachably connected by a first fastening member such as a screw or a bolt (not shown in the figure), which is a commonly used detachable connection method, which is simple and convenient to operate. Of course, it is not limited to this. The protective member 4 and the end plate 2 can also be connected by a detachable connection method such as a snap fastener, which can be selected according to actual needs.

[0053] Furthermore, preferably, both ends of the protective member 4 are detachably connected to the two corresponding end plates 2. Of course, this is not limited to this, and only one end of the protective member 4 can be detachably connected to the corresponding end plate 2 through the first fastening member.

[0054] In this embodiment, preferably, Figure 4 and Figure 5 As shown, the protective component 4 includes a main body 41 and a first connecting portion 42 connected to each other; wherein the main body 41 is formed with a accommodating cavity and an inlet 44 and an outlet 45 connected to the accommodating cavity; along the arrangement direction of the battery cells, at least one end of the main body 41 is provided with a connecting portion; the first connecting portion 42 is connected to the corresponding end plate 2.

[0055] According to the structure described above, the main body 41 mainly serves to shield the explosion-proof valve and accommodate the electrolyte; the first connecting portion 42 serves as a transition to connect the main body 41 and the end plate 2 together.

[0056] Furthermore, preferably, the body 41 is a hollow steel member with a hollow interior and at least one end open, and preferably, the cross section along the length direction of the body 41 is a square ring, of course, not limited thereto.

[0057] Further, preferably, the first connecting portion 42 is an L-shaped plate, but is not limited thereto.

[0058] Furthermore, preferably, the main body 41 and the first connecting portion 42 are an integrated structure. Of course, this is not limited thereto, and they may also be a split structure, or they may be connected by welding or other methods.

[0059] Further, preferably, the first connecting portion 42 is detachably connected to the corresponding end plate 2 via the aforementioned first fastening member. Based on this, preferably, a first auxiliary mounting through hole 421 is provided on the first connecting portion 42 for mounting the first fastening member.

[0060] In this embodiment, preferably, Figure 4 and Figure 5 As shown, the protective member 4 further includes a second connecting portion 43 connected to the body 41 , and the second connecting portion 43 is detachably connected to the insulating plate 3 via a second fastening member.

[0061] According to the structure described above, the second connecting portion 43 is detachably connected to the insulating plate 3 via a second fastening member such as a screw or a bolt, thereby further reinforcing and supporting the protective member 4 .

[0062] Furthermore, preferably, there are a plurality of second connection portions 43 , which are sequentially spaced apart along the length direction of the protective member 4 , that is, the arrangement direction of the battery cells.

[0063] Furthermore, preferably, the second connecting portion 43 is a square plate. Of course, the shape of the connecting portion is not limited thereto and can be designed according to actual needs.

[0064] Furthermore, preferably, the second connection portion 43 may be connected to the body 41 by welding. Of course, the present invention is not limited thereto, and the second connection portion 43 may also be an integrated structure with the body 41 .

[0065] Furthermore, preferably, a second auxiliary installation through hole 431 is formed on the second connecting portion 43 for installing a second fastening member.

[0066] In this embodiment, preferably, Figure 1 and Figure 2 As shown, an escape groove 21 is formed on the top of the end plate 2 along its height direction.

[0067] According to the structure described above, the avoidance groove 21 serves to avoid the head of a fastening member such as a screw or a bolt, thereby preventing the head from protruding from the top of the battery module 10 and affecting the installation of the box cover 20 .

[0068] In this embodiment, preferably, Figure 1 and Figure 2 As shown, the battery module 10 further includes a top foam 7 , and the top foam 7 is disposed on the top of the battery cell assembly 1 to provide protection.

[0069] In this embodiment, preferably, Figures 1 to 3 As shown, the battery module 10 further includes a binding strap 5 for fixing the battery cell assembly and the end plate 2 .

[0070] According to the structure described above, the battery cell assembly 1 and structural members such as the end plate 2 are bound together by the binding strap 5 to play a reinforcing role.

[0071] Example 2

[0072] See also Figures 6 to 12 As shown, the second embodiment of the present application further provides a battery pack, including the battery module 10 described in the above-mentioned first embodiment, and thus has all the beneficial technical effects of the battery module 10, and the same technical features and beneficial effects are not repeated.

[0073] In this embodiment, preferably, Figures 6 to 8 As shown, the battery pack also includes a box cover 20 and a liquid cooling plate 30; wherein, the battery module 10 is arranged on the upper surface of the liquid cooling plate 30, and the end plate 2 of the battery module 10 is connected to the liquid cooling plate 30; the box cover 20 covers the liquid cooling plate 30 and is connected to the liquid cooling plate 30.

[0074] According to the structure described above, using the liquid cooling plate 30 directly as the bottom plate of the battery pack saves space, helps to improve the energy density of the battery pack, and also saves parts.

[0075] In this embodiment, preferably, Figure 1 、 Figure 2 、 Figure 6 and Figure 8 As shown, a positioning groove 22 is formed at the bottom of the end plate 2 along its height direction, and a positioning protrusion 301 is formed on the liquid cooling plate 30 , and the positioning protrusion 301 is inserted into the positioning groove 22 .

[0076] According to the structure described above, the positioning protrusion 301 cooperates with the positioning groove 22 to position the battery module 10 and the liquid cooling plate 30 , thereby improving assembly efficiency and accuracy.

[0077] In this embodiment, preferably, Figure 7 and Figure 8 As shown, the liquid cooling plate 30 is formed with an auxiliary connection portion 302 extending toward the outside thereof and used for connecting to a target site.

[0078] According to the structure described above, the auxiliary connection portion 302 can be detachably connected to the target location, such as the cluster frame, by screws or bolts, and is a detachable connection structure, which is convenient for later maintenance.

[0079] In this embodiment, preferably, Figure 2 As shown, the end plate 2 of the battery module 10 and the liquid cooling plate 30 are detachably connected via a third fastening member 6 such as screws or bolts, which is a commonly used detachable connection method that is simple and convenient to operate. Of course, the present invention is not limited thereto.

[0080] In this embodiment, preferably, Figures 9 to 12 As shown, the battery pack also includes an insulating seat 40, a support seat 50 and a lead-out row 60; wherein, the support seat 50 is arranged on the liquid cooling plate 30, and the support seat 50 is formed with a support groove 501 with openings on both sides and the top, the lead-out row 60 is installed in the support groove 501, and the lead-out row 60 is connected to a total output electrode of the battery module 10; the insulating seat 40 is fixed on the end plate 2 of the battery module 10, and the lead-out row 60 is detachably connected to the insulating seat 40.

[0081] According to the structure described above, the insulating seat 40 and the support seat 50 play the role of installing and supporting the lead-out bar 60, making the lead-out bar 60 more stable, and the insulating seat 40 also plays the role of insulating and separating the end plate 2 and the lead-out bar 60, that is, it plays the role of insulation protection; the lead-out bar 60 is used to lead a total output electrode on one side of the battery module 10, such as a total positive electrode or a total negative electrode, to the battery management module 70 on the other side of the battery module 10.

[0082] Furthermore, preferably, the support base 50 and the liquid cooling plate 30 are detachably connected by screws or bolts.

[0083] Furthermore, preferably, the battery management module 70 is disposed at one end of the liquid cooling plate 30 along the length direction of the battery module 10 .

[0084] In this embodiment, preferably, Figure 10 and Figure 11 As shown, the battery pack also includes side beams 80, the number of which is at least three, and they respectively abut against at least three sides of the battery module 10; the side beams 80 are U-shaped and are detachably connected to the liquid cooling plate 30 through a fourth fastening member 90; the two side beams 80 arranged on opposite sides of the battery module 10 are both formed with lifting ears 801.

[0085] According to the structure described above, the side beam 80 can be used to limit the side of the battery module 10, making the battery module 10 more stable, and the side beam 80 is designed to be U-shaped, which is convenient for installing the fourth fastening member 90 such as a screw or bolt inside the U-shaped structure, and is not easy to interfere with other structural parts, and the structure is stable. In addition, the two side beams 80 on the opposite sides of the battery module 10 are provided with lifting ears 801 to facilitate lifting, save manpower and improve work efficiency.

[0086] Furthermore, preferably, a side beam 80 is provided on both opposite sides of each battery module 10, and the number of side beams 80 varies according to the number of battery modules 10. Preferably, when the battery modules 10 are arranged in an array, at least one end of the overall structure is also provided with a side beam 80. Of course, this is not limited to this, and the number and position of the side beams 80 can also be designed according to actual needs.

[0087] In this embodiment, preferably, Figure 6 、 Figure 9 and Figure 10 As shown, there are two battery modules 10 , which are sequentially spaced along the length of the liquid cooling plate 30 , and the length of each battery module 10 , that is, the arrangement direction of the battery cells, is the same as the length of the liquid cooling plate 30 .

[0088] Of course, it is not limited to this. The number of battery modules 10 can also be one or more than two, such as three, four or five, etc., and the placement direction of each battery module 10 and the layout of multiple battery modules 10 are not limited to the above, and can be selected according to actual needs.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, characterized in that: include: A cell assembly, an end plate, an insulating plate, and a protective member; wherein the battery module includes a cell assembly, an end plate, an insulating plate, and a protective member; wherein the cell assembly includes a plurality of sequentially arranged cells, and foam is provided between any two adjacent cells; along the arrangement direction of the cells, the end plates are respectively provided at both ends of the cell assembly; The insulating plate is arranged on the side of the battery cell where the explosion-proof valve is provided, and a through hole is formed on the insulating plate corresponding to the explosion-proof valve; the protective member is arranged on the side of the insulating plate away from the battery cell, and the protective member extends along the arrangement direction of the battery cell, and at least one end of the protective member is connected to the end plate; the protective member is formed with a accommodating cavity and an inlet and an outlet connected to the accommodating cavity, and the inlet corresponds to and is connected to the through hole one by one.

2. The battery module according to claim 1, wherein: The outlet is formed on at least one end of the protection member along the arrangement direction of the battery cells.

3. The battery module according to claim 1, wherein: The protective member is detachably connected to the end plate via a first fastening member.

4. The battery module according to claim 1, wherein: The protective component includes a main body and a first connecting portion that are connected to each other; wherein, the main body is formed with the accommodating cavity and the inlet and outlet connected to the accommodating cavity; along the arrangement direction of the battery cells, the connecting portion is provided at at least one end of the main body; the first connecting portion is connected to the corresponding end plate.

5. The battery module according to claim 4, characterized in that: The protective component further includes a second connecting portion connected to the body, and the second connecting portion is detachably connected to the insulating plate via a second fastening component.

6. The battery module according to claim 1, characterized in that: The top of the end plate along its height direction is formed with an avoidance groove; and / or The battery module further includes a binding strap for fixing the battery cell assembly and the end plate.

7. A battery pack, characterized in that: A battery module comprising the battery module according to any one of claims 1 to 6.

8. The battery pack according to claim 7, characterized in that: The battery pack also includes a box cover and a liquid cooling plate; wherein the battery module is arranged on the upper surface of the liquid cooling plate, and the end plate of the battery module is connected to the liquid cooling plate; the box cover covers the liquid cooling plate and is connected to the liquid cooling plate.

9. The battery pack according to claim 8, characterized in that: A positioning groove is formed at the bottom of the end plate along its height direction, and a positioning protrusion is formed on the liquid cooling plate, and the positioning protrusion is inserted into the positioning groove; and / or The end plate of the battery module is detachably connected to the liquid cooling plate via a third fastening member; and / or The liquid cooling plate is formed with an auxiliary connection portion extending toward the outside thereof and is used for connecting to a target site.

10. The battery pack according to claim 8, wherein: The battery pack further includes an insulating seat, a support seat and a lead-out row; wherein the support seat is arranged on the liquid cooling plate, and the support seat is formed with a support groove with openings on both sides and the top, the lead-out row is installed in the support groove, and the lead-out row is connected to a total output electrode of the battery module; the insulating seat is fixed to the end plate of the battery module, and the lead-out row is detachably connected to the insulating seat; and / or The battery pack also includes side beams, there are at least three side beams, and the side beams are respectively against at least three sides of the battery module; the side beams are U-shaped and are detachably connected to the liquid cooling plate via a fourth fastening member; the two side beams arranged on opposite sides of the battery module are both formed with lifting ears.

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