Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a box body, a fuse and a battery cell module, the box body is provided with a containing groove which is used for containing cooling liquid. The fuse is installed in the box body, the fuse is located in the containing groove, and the fuse can be immersed in the cooling liquid; the battery cell module is installed in the box body, the battery cell module and the fuse are located in the same containing groove and are electrically connected with each other, the battery cell module and the fuse form an electric connection loop, and the cooling liquid, the battery cell module and the fuse are located in the same containing groove so that the battery cell module and the fuse can be immersed in the cooling liquid conveniently, immersion of the fuse in the battery pack is achieved, and the service life of the battery pack is prolonged. The use effect of the battery pack in the immersion scene of the fuse is ensured, and the use stability of the battery pack in the immersion scene is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field especially relates to a battery pack. BACKGROUND

[0002] With the development of science and technology, battery pack gradually applies people's life, as a part of electronic equipment, battery pack contains multiple electronic parts and box, multiple electronic parts are built in the box and are in the containing groove of the box, however, multiple electronic parts are in the conventional scene, which affects the use stability of battery pack in the immersion scene. UTILITY MODEL CONTENTS

[0003] One purpose of the utility model is to provide a battery pack, which aims to realize the immersion of the fuse in the battery pack, ensure the use effect of the battery pack when the fuse is in the immersion scene, and improve the use stability of the battery pack in the immersion scene.

[0004] To achieve the above purpose, the utility model provides a kind of scheme: a kind of battery pack, comprising:

[0005] Box, is equipped with containing groove, the containing groove is used to contain cooling liquid;

[0006] Fuse, is installed in the box, the fuse is in the containing groove, the fuse can be immersed by cooling liquid;

[0007] Battery cell module, is installed in the box, the battery cell module and the fuse are in the same containing groove, and are mutually electrically connected.

[0008] Optionally, the battery pack further includes a support member connected to a side wall of the box forming the containing groove and supporting the fuse, so that the fuse is arranged suspended relative to the box.

[0009] Optionally, the support member includes a first support frame and a second support frame, the first support frame and the second support frame are arranged at two ends of the fuse, and the first support frame and the second support frame are respectively connected to the two ends of the fuse.

[0010] The fuse is arranged along the length direction or the width direction of the box;There is a gap between the side wall of the fuse and the side wall of the box forming the containing groove.

[0011] Optionally, the fuse is arranged on one side of the battery cell module.

[0012] The battery pack further includes a first conductive member arranged between the fuse and the battery cell module and electrically connecting the fuse and the battery cell module.

[0013] The first conductive piece is a rigid conductive piece or a flexible conductive piece.

[0014] Optionally, the battery pack further comprises a positive electrode butt joint piece, a negative electrode butt joint piece, a second conductive piece and a third conductive piece.

[0015] The positive electrode butt joint piece and the negative electrode butt joint piece are respectively detachably mounted on the box body; the external butt joint end of the positive electrode butt joint piece and the external butt joint end of the negative electrode butt joint piece are exposed to the outside of the box body.

[0016] The second conductive piece is between the positive electrode butt joint piece and the fuse and electrically connects the positive electrode butt joint piece and the fuse.

[0017] The third conductive piece is between the negative electrode butt joint piece and the battery cell module and electrically connects the positive electrode butt joint piece and the battery cell module.

[0018] The positive electrode butt joint piece, the second conductive piece, the fuse, the first conductive piece, the battery cell module, the third conductive piece and the negative electrode butt joint piece are sequentially connected.

[0019] Optionally, the battery pack further comprises a temperature butt joint assembly, the temperature butt joint assembly comprising a temperature butt joint piece and a plurality of thermocouple wires.

[0020] The temperature butt joint piece is detachably mounted on the box body; one end of each of the plurality of thermocouple wires is electrically connected to the temperature butt joint piece, and the other end of each of the plurality of thermocouple wires respectively contacts at least two of the second conductive piece, the fuse, the first conductive piece, the battery cell module and the third conductive piece.

[0021] The plurality of thermocouple wires are arranged along the direction of the side wall of the box body in which the accommodating groove is formed.

[0022] Optionally, the battery pack further comprises a liquid inlet piece and a liquid outlet piece.

[0023] The liquid inlet piece is connected to the box body, and the liquid inlet piece has a liquid inlet flow channel that is in communication with the accommodating groove.

[0024] The liquid outlet piece is connected to the box body, and the liquid outlet piece has a liquid outlet flow channel that is in communication with the accommodating groove.

[0025] The connection position of the liquid inlet piece and the box body is higher than the connection position of the liquid outlet piece and the box body.

[0026] Optionally, the accommodating groove has an opening.

[0027] The battery pack further comprises a cover body that is sealingly connected to the box body and can close the opening.

[0028] Optionally, the box body has a ring-shaped supporting arm, which is arranged opposite to the cover body.

[0029] The battery pack further comprises a sealing member, which is between the cover body and the ring-shaped supporting arm and is pressed by the cover body or the ring-shaped supporting arm.

[0030] Optionally, the battery pack further comprises an explosion-proof valve, which is installed on the cover body.

[0031] The battery pack has the advantages that:

[0032] The utility model discloses a battery pack, the box body is equipped with containing groove, and the containing groove is used for containing cooling liquid, the fuse is installed in the box body, and the fuse is in the containing groove, and the fuse can be immersed by the cooling liquid, the electric core module is installed in the box body, and the electric core module and the fuse are in the same containing groove and are electrically connected with each other, and the electric core module and the fuse form an electric connection loop, and the cooling liquid, the electric core module and the fuse are in the same containing groove, so that the cooling liquid can immerse the electric core module and the fuse, the immersion of the fuse in the battery pack is realized, the use effect of the battery pack in the immersion scene is guaranteed, and the use stability of the battery pack in the immersion scene is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to the structure shown in these drawings without paying creative labor.

[0034] Figure 1 It is the assembly structure schematic diagram of the battery pack provided by the utility model embodiment;

[0035] Figure 2 It is the exploded structure schematic diagram of the battery pack provided by the utility model embodiment;

[0036] Figure 3 It is the internal structure cross-sectional view of the battery pack provided by the utility model embodiment;

[0037] Figure 4 It is the connection schematic diagram of the fuse and the electric core module of the battery pack provided by the utility model embodiment.

[0038] Explanation of the attached drawings:

[0039] 100, battery pack;

[0040] 10, box; 10a, containing groove; 10b, opening; 101, annular support arm; 11, liquid inlet; 11a, liquid inlet channel; 12, liquid outlet; 12a, liquid outlet channel; 13, cover; 14, sealing element; 15, explosion-proof valve;

[0041] 20, fuse; 21, support; 211, first support frame; 212, second support frame;

[0042] 30, battery cell module;

[0043] 40, first conductive element;

[0044] 50, positive electrode butt joint element;

[0045] 60, negative electrode butt joint element;

[0046] 70, second conductive element;

[0047] 80, third conductive element;

[0048] 90, temperature butt joint assembly; 91, temperature butt joint element. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0050] Please refer to the drawings Figures 1-4 The embodiments of the present application provide a battery pack 100, which comprises a box 10, a fuse 20 and a battery cell module 30. The box 10 is provided with a containing groove 10a for containing cooling liquid. The fuse 20 is installed on the box 10 and is located in the containing groove 10a. The fuse 20 can be immersed in the cooling liquid. The battery cell module 30 is installed on the box 10 and is located in the same containing groove 10a as the fuse 20 and is electrically connected to the fuse 20. The battery cell module 30 and the fuse 20 form an electric connection loop. The cooling liquid, the battery cell module 30 and the fuse 20 are located in the same containing groove 10a so that the cooling liquid can immerse the battery cell module 30 and the fuse 20. The immersion of the fuse 20 in the battery pack 100 is realized, the use effect of the battery pack 100 in the immersion scenario is ensured, the use stability of the battery pack 100 in the immersion scenario is improved, the use effect of the fuse 20 is compatible, and the safety effect of the battery pack 100 is ensured.

[0051] Please refer to the drawings Figures 1-3In the embodiment of the present application, the box 10 is used as a supporting component of the battery pack 100, and the box 10 is used to support the fuse 20 and the battery cell module 30. The box 10 is provided with a containing groove 10a, which is used as an internal space of the box 10 and is used to contain the cooling liquid, so that the cooling liquid is contained in the inside of the box 10 through the containing groove 10a, thereby facilitating the storage of the cooling liquid in the box 10.

[0052] Please refer to the accompanying drawings Figures 2-4 In the embodiment of the present application, the fuse 20 is arranged in the inside of the box 10, and the fuse 20 is mounted on the box 10 and is located in the containing groove 10a, so that the fuse 20 is located in the same containing groove 10a as the cooling liquid, and the fuse 20 can be immersed in the cooling liquid.

[0053] Please refer to the accompanying drawings Figures 2-4 In the embodiment of the present application, the battery cell module 30 is arranged in the inside of the box 10, and the battery cell module 30 is mounted on the box 10 and is located in the same containing groove 10a as the fuse 20 and is electrically connected to each other, and the battery cell module 30 and the fuse 20 form an electrically connected loop, and the cooling liquid, the battery cell module 30 and the fuse 20 are located in the same containing groove 10a, so that the cooling liquid can immerse the battery cell module 30 and the fuse 20, thereby realizing the immersion of the fuse 20 in the battery pack 100, ensuring the use effect of the battery pack 100 in the immersion scenario of the fuse 20, improving the use stability of the battery pack 100 in the immersion scenario, and compatible with the use effect of the fuse 20, thereby ensuring the safety effect of the battery pack 100.

[0054] Please refer to the accompanying drawings Figures 2-4 The battery pack 100 further comprises a support 21, which is located between the box 10 and the fuse 20, and the support 21 is arranged in the vertical direction and is connected to the bottom side wall of the box 10 forming the containing groove 10a and supports the fuse 20, so that the fuse 20 is fixedly connected to the box 10 through the support 21, thereby ensuring the position of the fuse 20 relative to the box 10. The distance between the fuse 20 and the bottom side wall of the containing groove 10a is increased through the support 21, so that the fuse 20 is arranged in a suspended manner relative to the box 10, thereby facilitating the immersion of the multiple surfaces of the fuse 20 in the cooling liquid, and ensuring the immersion effect of the fuse 20.

[0055] Please refer to the accompanying drawings Figures 2-4The support 21 comprises a first support frame 211 and a second support frame 212, the first support frame 211 and the second support frame 212 are oppositely arranged, the first support frame 211 and the second support frame 212 are both arranged along the vertical direction, the first support frame 211 and the second support frame 212 are arranged at two ends of the fuse 20, and the first support frame 211 and the second support frame 212 are respectively connected to the two ends of the fuse 20, so that the fuse 20 realizes two supporting points through the first support frame 211 and the second support frame 212, the supporting effect of the support 21 relative to the fuse 20 is improved, and the stability of the fuse 20 relative to the box body 10 is improved; the fuse 20 is arranged along the length direction or the width direction of the box body 10; there is a gap between the side wall of the fuse 20 and the side wall of the accommodating groove 10a in the box body 10, the distance between the six surfaces of the fuse 20 and the side wall of the accommodating groove 10a is ensured, the surface of the fuse 20 is prevented from being in contact with the side wall of the accommodating groove 10a, and the immersion effect of the cooling liquid relative to the fuse 20 is improved.

[0056] Please refer to the accompanying drawings Figures 2-4 The fuse 20 is arranged outside the battery cell module 30; the battery pack 100 further comprises a first conductive piece 40, the first conductive piece 40 is between the fuse 20 and the battery cell module 30, two ends of the first conductive piece 40 are connected to the fuse 20 and the battery cell module 30 through bolts respectively, and the first conductive piece 40 is electrically connected to the fuse 20 and the battery cell module 30, so that the fuse 20 realizes electrical connection with the battery cell module 30 through the first conductive piece 40, so as to realize an electrical connection loop of the fuse 20, the first conductive piece 40 and the battery cell module 30. Optionally, the first conductive piece 40 is a rigid conductive piece or a flexible conductive piece, so as to ensure the electrical connection effect of the fuse 20 and the battery cell module 30.

[0057] Please refer to the accompanying drawings Figures 2-4 The battery pack 100 further comprises a positive electrode butt joint piece 50, a negative electrode butt joint piece 60, a second conductive piece 70 and a third conductive piece 80; the positive electrode butt joint piece 50 and the negative electrode butt joint piece 60 are detachably mounted to the box body 10, so that the positive electrode butt joint piece 50 and the negative electrode butt joint piece 60 can be connected to or separated from the box body 10 through bolts, and the replaceability of the positive electrode butt joint piece 50 and the negative electrode butt joint piece 60 is improved; the external butt joint end of the positive electrode butt joint piece 50 and the external butt joint end of the negative electrode butt joint piece 60 are exposed outside the box body 10; so as to butt joint the positive electrode butt joint piece 50 and the negative electrode butt joint piece 60 in the external environment by an external electrical appliance.

[0058] Please refer to the accompanying drawings Figures 2-4 The second conductive piece 70 is between the positive electrode butt joint piece 50 and the fuse 20, two ends of the second conductive piece 70 are connected to the positive electrode butt joint piece 50 and the fuse 20 through bolts respectively, and the second conductive piece 70 is electrically connected to the positive electrode butt joint piece 50 and the fuse 20, so that the positive electrode butt joint piece 50 realizes electrical connection with the fuse 20 through the second conductive piece 70.

[0059] Please refer to the attached drawings Figures 2-4 The third conductive piece 80 is arranged between the negative electrode butt joint piece 60 and the battery cell module 30, and the two ends of the third conductive piece 80 are connected to the negative electrode butt joint piece 60 and the battery cell module 30 through bolts, and the third conductive piece 80 is electrically connected to the positive electrode butt joint piece 50 and the battery cell module 30, so that the negative electrode butt joint piece 60 is electrically connected to the fuse 20 through the third conductive piece 80.

[0060] The positive electrode butt joint piece 50, the second conductive piece 70, the fuse 20, the first conductive piece 40, the battery cell module 30, the third conductive piece 80 and the negative electrode butt joint piece 60 are sequentially connected, so that the positive electrode butt joint piece 50, the second conductive piece 70, the fuse 20, the first conductive piece 40, the battery cell module 30, the third conductive piece 80 and the negative electrode butt joint piece 60 form an electric connection loop.

[0061] Please refer to the attached drawings Figures 2-3 The battery pack 100 further comprises a temperature butt joint assembly 90, and the temperature butt joint assembly 90 comprises a temperature butt joint piece 91 and a plurality of thermocouple wires. The temperature butt joint piece 91 is detachably mounted on the box body 10, so that the temperature butt joint piece 91 can be connected to or separated from the box body 10 through bolts, thereby improving the replacement convenience of the temperature butt joint piece 91 relative to the box body 10. One end of each of the plurality of thermocouple wires is electrically connected to the temperature butt joint piece 91, and the other end of each of the plurality of thermocouple wires contacts at least two of the second conductive piece 70, the fuse 20, the first conductive piece 40, the battery cell module 30 and the third conductive piece 80. The plurality of thermocouple wires are arranged along the direction of the side wall of the box body 10 in which the accommodating groove 10a is formed, so that the temperature butt joint piece 91 can sense the temperature of at least two of the second conductive piece 70, the fuse 20, the first conductive piece 40, the battery cell module 30 and the third conductive piece 80 through the plurality of thermocouple wires, thereby allowing an operator to record the temperature of the second conductive piece 70, the fuse 20, the first conductive piece 40, the battery cell module 30 and the third conductive piece 80.

[0062] Please refer to the attached drawings Figures 1-3The battery pack 100 further comprises a liquid inlet member 11 and a liquid outlet member 12, the liquid inlet member 11 and the liquid outlet member 12 are located at different side walls of the box body 10; the liquid inlet member 11 is connected to the box body 10, the liquid inlet member 11 has a liquid inlet flow channel 11a, the liquid inlet flow channel 11a is communicated with the accommodating groove 10a, so that the cooling liquid flows to the accommodating groove 10a through the liquid inlet flow channel 11a, thereby the cooling liquid immerses the fuse 20. The liquid outlet member 12 is connected to the box body 10, the liquid outlet member 12 has a liquid outlet flow channel 12a, the liquid outlet flow channel 12a is communicated with the accommodating groove 10a, so that the cooling liquid in the accommodating groove 10a is discharged outwardly through the liquid outlet flow channel 12a, thereby the cooling liquid circulates through the liquid inlet flow channel 11a, the accommodating groove 10a and the liquid outlet flow channel 12a in sequence, and completes heat exchange. The connection position of the liquid inlet member 11 and the box body 10 is higher than the connection position of the liquid outlet member 12 and the box body 10, the liquid outlet member 12 fully utilizes the gravity of the cooling liquid, and improves the discharge smoothness of the cooling liquid.

[0063] Please refer to the accompanying drawings Figures 2-3 The accommodating groove 10a has an opening 10b; the opening 10b is located at the top end of the box body 10, the battery pack 100 further comprises a cover body 13, the cover body 13 is sealingly connected to the box body 10 and can close the opening 10b, thereby the sealing effect of the opening 10b is ensured, the cooling liquid in the accommodating groove 10a is prevented from flowing to the external environment through the opening 10b, and the storage effect of the box body 10 on the cooling liquid is improved.

[0064] Please refer to the accompanying drawings Figures 2-3 The box body 10 has a ring-shaped supporting arm 101, the ring-shaped supporting arm 101 is oppositely arranged with the cover body 13; the battery pack 100 further comprises a sealing member 14, the sealing member 14 is located between the cover body 13 and the ring-shaped supporting arm 101 and is extruded by the cover body 13 or the ring-shaped supporting arm 101, so that the cover body 13 is sealingly connected with the ring-shaped supporting arm 101 through the sealing member 14, the sealing area of the cover body 13 and the box body 10 is increased, and the sealing effect of the cover body 13 and the box body 10 is ensured.

[0065] Please refer to the accompanying drawings Figures 1-2 The battery pack 100 further comprises an explosion-proof valve 15, the explosion-proof valve 15 is installed on the cover body 13, the explosion-proof valve 15 is connected with the cover body 13 through a through hole of the cover body 13, the outer contour of the explosion-proof valve 15 is in contact with the inner side wall of the through hole of the cover body 13, the explosion-proof valve 15 seals the gas or liquid in the box body 10 by using a valve flap, and prevents the gas or liquid in the explosion-proof valve 15 from leaking outwardly. When the pressure in the box body 10 rises, the explosion-proof valve 15 will automatically open or close according to the change of the pressure, thereby the sealing property and safety of the box body 10 are ensured.

[0066] Optionally, the battery pack 100 is tested, and the test process is as follows: the battery pack 100 is set as a first experimental group, the cooling liquid is filled in the box body 10, the cooling liquid immerses the fuse 20, and the cooling liquid circulates and completes heat exchange through the liquid inlet member 11 and the liquid outlet member 12.

[0067] Another battery pack 100 is set as a second experimental group, all structures and components are the same, but no liquid injection treatment is carried out in the box 10.

[0068] The test steps are as follows:

[0069] (I) Charge and discharge test

[0070] First. Place the two battery packs 100 at 25±2℃ for 5h;

[0071] Second. Discharge to any single cell cutoff voltage 2.5V at rated power, stand for 10min;

[0072] Third. Charge to any single cell cutoff voltage 3.65V at rated power, stand for 10min;

[0073] Fourth. Discharge to any single cell cutoff voltage 2.5V at rated power, stand for 10min;

[0074] Fifth. Record the current, voltage, time, energy, capacity, temperature and other data throughout the experiment.

[0075] (II) Short circuit test

[0076] First. Place the two battery packs 100 at 25±2℃ for 5h;

[0077] Second. Discharge to any single cell cutoff voltage 2.5V at rated power, stand for 10min;

[0078] Third. Charge to any single cell cutoff voltage 3.65V at rated power, stand for 10min;

[0079] Fourth. Connect the positive and negative connectors of the battery pack 100 to the short circuit test device, with the requirements that the positive contact resistance is <0.1mΩ, the negative contact resistance is <0.1mΩ, and the short circuit wire harness is fixed with a tool;

[0080] Fifth. The external circuit resistance is [0.8, 1.0]mΩ (external circuit resistance = test device resistance + positive contact resistance + negative contact resistance + test line resistance), and the total positive and total negative of the battery pack 100 are externally short-circuited for 10min;

[0081] Sixth. Stand for 1h, and record the current, voltage, time, energy, capacity, temperature and other data throughout the experiment;

[0082] Seventh. Observe whether there are swelling, liquid leakage, smoke, fire, explosion and other phenomena;

[0083] Eighth. After the test is completed, replace the fuse 20, repeat (I) charge and discharge test, and confirm whether the battery cell module 30 is damaged.

[0084] The utility model discloses beneficial effect lies in:

[0085] The utility model provides a battery pack 100 is applied to, the box 10 is equipped with the accommodation groove 10a, and the accommodation groove 10a is used to accommodate cooling liquid, the fuse 20 is installed in the box 10, and the fuse 20 is in the accommodation groove 10a, and the fuse 20 can be immersed by cooling liquid, the electric core module 30 is installed in the box 10, and the electric core module 30 with the fuse 20 are in same accommodation groove 10a, and are mutually electrically connected, and the electric core module 30 with the fuse 20 form an electric connection loop, and cooling liquid, electric core module 30, the fuse 20 are in same accommodation groove 10a, so as to immerse electric core module 30, the fuse 20 by cooling liquid, realize the immersion of the fuse 20 in battery pack 100, guarantee battery pack 100 at the use effect of the fuse 20 in the immersion scene, improve the use stability of battery pack 100 in the immersion scene, and the use effect of the fuse 20 is compatible, guarantee the safety effect of battery pack 100.

[0086] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the utility model embodiments are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0087] It should also be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0088] In addition, the descriptions of "first", "second", etc. in the utility model are only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled persons in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.

[0089] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings contents, or direct / indirect application in other related technical fields is included in the patent protection scope of the utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body provided with a containing groove for containing cooling liquid; a fuse installed in the box body, the fuse being immersed in the containing groove and being capable of being immersed in the cooling liquid; a battery cell module installed in the box body, the battery cell module and the fuse being in the same containing groove and being electrically connected to each other.

2. The battery pack of claim 1, wherein, The battery pack further comprises a support connected to a side wall of the box body forming the containing groove and supporting the fuse, so that the fuse is arranged in a suspended manner relative to the box body.

3. The battery pack of claim 2, wherein, The support comprises a first support frame and a second support frame, the first support frame and the second support frame being arranged at two ends of the fuse respectively, and the first support frame and the second support frame being connected to the two ends of the fuse respectively. The fuse is arranged along a length direction or a width direction of the box body, and a gap is formed between a side wall of the fuse and a side wall of the box body forming the containing groove.

4. The battery pack of any one of claims 1-3, wherein, The fuse is arranged at one side of the battery cell module. The battery pack further comprises a first conductive member arranged between the fuse and the battery cell module and electrically connecting the fuse and the battery cell module. The first conductive member is a rigid conductive member or a flexible conductive member.

5. The battery pack of claim 4, wherein, The battery pack further comprises a positive electrode butt joint member, a negative electrode butt joint member, a second conductive member and a third conductive member. The positive electrode butt joint member and the negative electrode butt joint member are detachably installed in the box body, and an external butt joint end of the positive electrode butt joint member and an external butt joint end of the negative electrode butt joint member are exposed to an outside of the box body. The second conductive member is arranged between the positive electrode butt joint member and the fuse and electrically connects the positive electrode butt joint member and the fuse. The third conductive member is arranged between the negative electrode butt joint member and the battery cell module and electrically connects the positive electrode butt joint member and the battery cell module. The positive electrode butt joint member, the second conductive member, the fuse, the first conductive member, the battery cell module, the third conductive member and the negative electrode butt joint member are sequentially connected.

6. The battery pack of claim 5, wherein, The battery pack further comprises a temperature butt joint assembly, the temperature butt joint assembly comprising a temperature butt joint member and a plurality of thermocouple wires. The temperature butt joint member is detachably installed in the box body, one end of each of the plurality of thermocouple wires is electrically connected to the temperature butt joint member, and the other end of each of the plurality of thermocouple wires contacts at least two of the second conductive member, the fuse, the first conductive member, the battery cell module and the third conductive member. The plurality of thermocouple wires are arranged along a direction of a side wall of the box body forming the containing groove.

7. The battery pack of any one of claims 1-3, wherein, The battery pack further comprises a liquid inlet member and a liquid outlet member. The liquid inlet member is connected to the box body, and the liquid inlet member has a liquid inlet flow channel communicating with the containing groove. The liquid outlet member is connected to the box body, and the liquid outlet member has a liquid outlet flow channel communicating with the containing groove. A connection position of the liquid inlet member and the box body is higher than a connection position of the liquid outlet member and the box body.

8. The battery pack of any one of claims 1-3, wherein, The containing groove has an opening. The battery pack further comprises a cover body sealingly connected to the box body and capable of closing the opening.

9. The battery pack of claim 8, wherein, The box has a ring-shaped supporting arm which is arranged opposite to the cover; The battery pack further comprises a seal which is between the cover and the ring-shaped supporting arm and is extruded by the cover or the ring-shaped supporting arm.

10. The battery pack of claim 8, wherein, The battery pack further comprises an explosion-proof valve which is installed on the cover.

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