Battery pack, counterweight system and working machine

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack, a counterweight system and an operation machine. The battery pack comprises at least two bodies, the bodies are used as counter weights, and each body comprises a shell and a connecting part; the connecting part is connected with the shell, and the connecting part is used for detachably connecting the two adjacent bodies. According to the battery pack disclosed by the utility model, the connecting part is arranged on the shell, so that two battery packs can be detachably connected through the connecting part when the battery pack disclosed by the embodiment is used, and the number of the battery packs can be increased or reduced according to the actual power consumption demand. Compared with the scheme that a bracket and a skin need to be additionally arranged when the battery pack is installed in the prior art, the embodiment of the utility model can avoid the additional arrangement of the bracket and the skin, thereby reducing the installation cost of the battery pack and improving the installation efficiency. The counterweight system comprises a counterweight structure and the battery pack. And the battery pack is detachably connected with the counterweight structure.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack, a counterweight system and an operating machine. Background Art

[0002] Electrical equipment, such as cranes, hoists and other operating machinery, requires a large amount of electricity to maintain long-term operation, which poses a great challenge to layout and cost. At present, when installing battery packs on cranes and other operating machinery, additional brackets are required to achieve effective installation of the battery packs; in order to protect the battery packs and prevent the battery packs from being collided during operation, skinning is required. However, the addition of brackets and skinning not only reduces the installation efficiency of the battery pack, but also increases the installation cost. Therefore, how to improve the installation efficiency of the battery pack and reduce the installation cost is an urgent problem that the industry needs to solve. Utility Model Content

[0003] The utility model provides a battery pack, a counterweight system and an operating machine, which are used to solve the defects of high battery pack installation cost and low installation efficiency in the prior art.

[0004] The utility model provides a battery pack, comprising at least two bodies, wherein the bodies are used as counterweights, and the bodies include:

[0005] case;

[0006] A connecting component is connected to the shell, and the connecting component is used to detachably connect two adjacent bodies.

[0007] According to the battery pack provided by the utility model, the two bodies are stacked in the vertical direction.

[0008] According to the battery pack provided by the utility model, the connecting component includes:

[0009] A first connecting component, disposed on the housing;

[0010] A second connecting component is disposed on the housing, and the second connecting component is disposed below the first connecting component;

[0011] The first connecting component is used for detachable connection with the second connecting component of the connecting component adjacent above, and the second connecting component is used for detachable connection with the first connecting component of the connecting component adjacent below, so that the two upper and lower adjacent bodies are detachably connected.

[0012] According to the battery pack provided by the utility model, along the vertical direction, the first connecting component is provided with a first mounting hole; the second connecting component is provided with a second mounting hole, and the first mounting hole is coaxially arranged with the second mounting hole.

[0013] According to the battery pack provided by the utility model, one of the first mounting hole and the second mounting hole is a U-shaped mounting hole.

[0014] According to the battery pack provided by the utility model, a first groove is formed on the side wall of the shell, and the connecting component is arranged in the first groove.

[0015] According to the battery pack provided by the utility model, a flow channel is formed inside the shell wall of the shell, and the shell wall is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both connected to the flow channel.

[0016] According to the battery pack provided by the utility model, the housing includes:

[0017] A bottom shell, the accommodating cavity is formed inside, the flow channel is formed in the shell wall of the bottom shell, and the water inlet and the water outlet are opened in the shell wall;

[0018] A cover body is arranged at the opening of the accommodating cavity to close the accommodating cavity.

[0019] A second aspect of the utility model provides a counterweight system, comprising a counterweight structure and a battery pack as described in any one of the above items; the battery pack is detachably connected to the counterweight structure.

[0020] The third aspect of the utility model provides an operating machine, comprising an operating machine body and the above-mentioned counterweight system; the counterweight system is connected to the operating machine body.

[0021] The utility model provides a battery pack, a counterweight system and an operating machine. By setting a connecting component on the shell, when the battery pack of this embodiment is used, two battery packs can be detachably connected through the connecting component, and the number of battery packs can be increased or decreased according to the actual power demand. Compared with the solution in the prior art that requires additional brackets and skins when installing battery packs, this embodiment can avoid adding brackets and skins, reduce the installation cost of the battery pack, and improve the installation efficiency. In addition, because the connecting component is used to detachably connect adjacent bodies, it is convenient to increase or decrease the number of battery packs to adapt to different power demand situations, expanding the application scenarios of the battery pack.

[0022] In addition, by providing a connecting component on the shell, the battery pack can be detachably connected to the counterweight through the connecting component, so that the battery pack can be used as a counterweight, reducing the number of counterweights used.

[0023] The counterweight system and the working machine of the present invention have at least the above advantages because they include the above battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the assembly structure of the battery pack provided by the utility model;

[0026] Figure 2 It is a schematic diagram of the explosion structure of the battery pack provided by the utility model;

[0027] Figure 3 It is a schematic diagram of the assembly structure of the battery module and the battery management module of the battery pack provided by the utility model;

[0028] Figure 4 It is a schematic diagram of the structure of the housing of the battery pack provided by the utility model when viewed from above;

[0029] Figure 5 It is a schematic diagram of the assembly structure of the counterweight system and the operating machine body provided by the utility model;

[0030] Figure 6 It is a partial exploded schematic diagram of the counterweight system and the operating machine body provided by the utility model;

[0031] Figure 7 It is a structural schematic diagram of a counterweight block of a counterweight system provided by the utility model.

[0032] Reference numerals:

[0033] 1. Counterweight system;

[0034] 10. Battery pack;

[0035] 100, housing; 101, accommodating chamber; 110, bottom shell; 120, cover; 130, sealing ring; 111, water inlet; 112, water outlet; 113, first groove;

[0036] 200, connecting component; 210, first connecting component; 220, second connecting component; 201, first mounting hole; 202, second mounting hole;

[0037] 300. Battery module;

[0038] 400, battery management module; 410, battery management module; 420, wiring harness;

[0039] 500, module fixing bracket;

[0040] 600. Explosion-proof components;

[0041] 700, high and low voltage connectors;

[0042] 20. counterweight structure; 21. counterweight block; 22. hoisting member; 23. fourth mounting hole; 211. second groove;

[0043] 2. The operating machine body. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0047] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Combine the following Figures 1 to 7 The battery pack of the utility model is described in detail. Figure 1 It is a schematic diagram of the assembly structure of the battery pack provided by the utility model; Figure 2 It is a schematic diagram of the explosion structure of the battery pack provided by the utility model; Figure 3 It is a schematic diagram of the assembly structure of the battery module and the battery management module of the battery pack provided by the utility model; Figure 4 It is a schematic diagram of the structure of the housing of the battery pack provided by the utility model when viewed from above; Figure 5 It is a schematic diagram of the assembly structure of the counterweight system and the operating machine body provided by the utility model; Figure 6 It is a partial exploded schematic diagram of the counterweight system and the operating machine body provided by the utility model; Figure 7 It is a structural schematic diagram of a counterweight block of a counterweight system provided by the utility model.

[0050] like Figure 1 and Figure 2 As shown, a specific embodiment of the first aspect of the utility model provides a battery pack 10. The battery pack 10 includes at least two bodies, the body is used as a counterweight, and the body includes a shell 100 and a connecting component 200; the connecting component 200 is connected to the shell 100, and the connecting component 200 is used to detachably connect two adjacent bodies.

[0051] In a specific embodiment of the utility model, by setting a connecting component 200 on the housing 100, when using the battery pack 10 of this embodiment, two battery packs 10 can be detachably connected through the connecting component 200, and the number of battery packs 10 can be increased or decreased according to the actual power demand. Compared with the solution in the prior art that requires additional brackets and skins when installing the battery pack 10, this embodiment can avoid the need for additional brackets and skins, thereby reducing the installation cost of the battery pack 10 and improving the installation efficiency.

[0052] In addition, because the connecting component 200 is used to detachably connect adjacent main bodies, it is convenient to increase or decrease the number of main bodies to adapt to different power requirements, thereby expanding the application scenarios of the battery pack 10.

[0053] Furthermore, because the connecting component 200 can connect the body with the counterweight, the battery pack of this embodiment can be used as a counterweight, thereby reducing the number of counterweights.

[0054] like Figure 2 and Figure 3 As shown, in a specific embodiment of the utility model, a housing 100 is formed with a housing 101; the battery pack 10 also includes a battery module 300 and a battery management module 400; the battery module 300 and the battery management module 400 are both arranged in the housing 101. Among them, the battery module 300 includes a battery cell; the battery management module 400 includes a battery management module 410 and a wiring harness 420; the battery management module 410 is arranged at the end of the battery module 300, and the wiring harness 420 is connected between the battery management module 410 and the battery cell to realize the electrical connection between the battery cell and the battery management module 410. The housing 100 plays a role in protecting the battery module 300 and the battery management module 400.

[0055] In some embodiments, the battery module 300 includes at least two battery cells; the two battery cells are arranged along the length direction or the width direction of the housing 100 .

[0056] like Figure 2 and Figure 4 As shown, in a specific embodiment of the present invention, the battery pack 10 also includes a module fixing bracket 500; the module fixing bracket 500 is arranged in the accommodating cavity 101; the module fixing bracket 500 is connected between the battery module 300 and the shell 100, and is used to stably install the battery module 300 in the accommodating cavity 101 of the shell 100 to avoid collision between the battery module 300 and the shell 100.

[0057] like Figure 2 and Figure 4As shown, in a specific embodiment of the present invention, the housing 100 includes a bottom shell 110 and a cover 120; a receiving cavity 101 is formed in the bottom shell 110, and the cover 120 is disposed at the opening of the receiving cavity 101 to close the receiving cavity 101, and the cover 120 is connected to the bottom shell 110. Specifically, the module fixing bracket 500 is located in the receiving cavity 101 and is connected to the bottom shell 110.

[0058] like Figure 2 As shown, in some embodiments, the housing 100 further includes a sealing ring 130, which is disposed between the cover 120 and the bottom shell 110 to increase the sealing of the accommodating cavity 101. Specifically, the sealing ring 130 is disposed on the upper surface of the bottom shell 110, and the cover 120 is covered on the upper surface of the sealing ring 130 and connected to the housing 100.

[0059] like Figure 1 and Figure 2 As shown, in a specific embodiment of the present invention, a flow channel is formed inside the shell wall of the shell 100, and a water inlet 111 and a water outlet 112 are opened in the shell wall, and the water inlet 111 and the water outlet 112 are both connected to the flow channel. A cooling medium is introduced into the flow channel through the water inlet 111. The cooling medium includes cold water, which takes out the heat generated by the battery module 300 during operation and flows out from the water outlet 112 to achieve cooling and heat dissipation of the battery pack 10.

[0060] In some embodiments, a flow channel is formed in the shell wall of the bottom shell 110, and a water inlet 111 and a water outlet 112 are opened in the shell wall of the bottom shell 110; the flow channel is arranged around the accommodating cavity 101, so that the cooling medium flows around the accommodating cavity 101, avoiding the occurrence of heat dissipation dead corners and improving the heat dissipation efficiency.

[0061] Specifically, the bottom shell 110 includes a bottom plate and a side panel; the side panel is arranged at the edge of the bottom plate and encloses the bottom plate to form a receiving cavity 101. A flow channel is formed in the side panel, and a water inlet 111 and a water outlet 112 are opened on the side panel, and the water inlet 111 and the water outlet 112 are located on the front side of the side panel.

[0062] Specifically, a flow channel is opened in the bottom plate, and the flow channel in the bottom plate is connected with the flow channel in the side panel, so as to further improve the heat dissipation efficiency.

[0063] Specifically, the side panels include a front side panel, a rear side panel, a left side panel and a right side panel; the front side panel, the rear side panel, the left side panel and the right side panel are respectively arranged on the front edge, the rear edge, the left edge and the right edge of the bottom plate in a one-to-one correspondence, and the front side panel, the rear side panel, the left side panel and the right side panel are connected end to end and enclosed with the bottom plate to form a receiving cavity 101. The water inlet 111 is formed on the left side of the front side panel, and the water outlet 112 is formed on the right side of the front side panel.

[0064] In a specific embodiment of the utility model, a housing 100 is formed with a housing 101; the battery pack 10 further includes an explosion-proof component 600; the explosion-proof component 600 is disposed in the housing 100, and is used to adjust the pressure in the housing 101. When the pressure in the housing 101 is greater than the safety pressure threshold, the explosion-proof component 600 opens to prevent the battery pack 10 from exploding, thereby improving the safety of use.

[0065] Specifically, the explosion-proof component 600 includes an explosion-proof valve; the side panel is provided with a third mounting hole connected to the accommodating chamber 101 , and the explosion-proof valve is installed in the third mounting hole. The explosion-proof valve is used to adjust the pressure in the accommodating chamber 101 .

[0066] In a specific embodiment of the present invention, a high-low voltage connector 700 is installed on the housing 100, and the high-low voltage connector 700 is electrically connected to the battery management module 400. Specifically, the high-low voltage connector 700 is installed on the side panel.

[0067] like Figure 5 and Figure 6 As shown, the two bodies are stacked in the vertical direction, which reduces the space occupied by the battery pack and allows more battery packs to be installed in a limited installation space.

[0068] like Figure 1 As shown, in a specific embodiment of the utility model, the connecting component 200 includes a first connecting component 210 and a second connecting component 220; the first connecting component 210 is arranged on the housing 100; the second connecting component 220 is arranged on the housing 100, and the second connecting component 220 is arranged below the first connecting component 210; the first connecting component 210 is used to be detachably connected with the second connecting component 220 of the connecting component 200 adjacent above, and the second connecting component 220 is used to be detachably connected with the first connecting component 210 of the connecting component 200 adjacent below, so that the two upper and lower adjacent bodies can be detachably connected. Through the first connecting component 210 and the second connecting component 220 arranged above and below, the two upper and lower battery packs 10 can be detachably connected to improve space utilization.

[0069] In some embodiments, the first connecting component 210 includes a hook, and the second connecting component 220 includes a hanging ring; the two battery packs 10 arranged up and down, the hook of the battery pack 10 located at the lower position is detachably connected to the hanging ring of the battery pack 10 located at the upper position, thereby realizing the detachable connection of the two battery packs 10 arranged up and down.

[0070] In some embodiments, the first connection component 210 includes a claw, and the second connection component 220 includes a slot. The claw of the lower battery pack 10 is inserted into the slot of the upper battery pack, so that the two upper and lower battery packs 10 can be detachably connected.

[0071] In a specific embodiment of the utility model, along the vertical direction, the first connecting component 210 is provided with a first mounting hole 201; the second connecting component 220 is provided with a second mounting hole 202, and the first mounting hole 201 and the second mounting hole 202 are coaxially arranged. When two battery packs 10 are connected up and down, the bolts are passed through the first mounting holes 201 and the second mounting holes 202 of the two connecting components 200 in sequence with the aid of fasteners, such as bolts and nuts, and then fixed with bolts, so as to realize the quick connection of the two battery packs 10 and improve the installation efficiency.

[0072] In some embodiments, an annular recess is formed on one side of the second connection component 220 facing the first connection component 210, the annular recess is coaxially arranged with the second mounting hole 202, and the annular recess is arranged at the outer edge of the second mounting hole 202. After the connection of the two battery packs 10 is completed, part of the bolts are located in the annular recess, which reduces the risk of automatic loosening of the bolts and improves installation stability and safety of use.

[0073] In a specific embodiment of the utility model, one of the first mounting hole 201 and the second mounting hole 202 is a U-shaped mounting hole. The U-shaped mounting hole can improve the load-bearing capacity of the connecting component 200 and improve the installation stability. When in use, the fastener is sequentially passed through the first mounting hole 201 of one of the two adjacent battery packs 10 and the U-shaped mounting hole of the other battery pack 10 to achieve the purpose of connecting the two battery packs 10 arranged up and down.

[0074] Specifically, the second mounting hole 202 is a U-shaped mounting hole, and the first mounting hole 201 is a circular mounting hole.

[0075] In some embodiments, the first connection assembly 210 includes a first connection plate, and the second connection assembly 220 includes a second connection plate. A first mounting hole is formed on the first connection plate, and a second mounting hole is formed on the second connection plate, which is simple in process.

[0076] It can be understood that the distance between the first connecting plate and the second connecting plate meets the installation requirements for installing the fasteners in the first mounting hole 201 and the second mounting hole 202, avoiding interference between the first connecting plate and the second connecting plate and the fasteners.

[0077] In a specific embodiment of the present invention, a first groove 113 is formed on the side wall of the shell 100, and the connecting component 200 is disposed in the first groove 113, which increases the connection area between the connecting component 200 and the shell 100 and reduces the risk of separation of the connecting component 200 and the shell 100.

[0078] Specifically, the side panel of the bottom shell 110 is provided with a first groove 113, the first connecting component 210 is located at the upper part of the first groove 113, the second connecting component 220 is located at the lower part of the first groove 113, and the three side surfaces of the first connecting component 210 and the second connecting component 220 are connected to the side panel, thereby reducing the risk of the first connecting component 210 and the second connecting component 220 being separated from the side panel.

[0079] like Figure 5 and Figure 6 As shown, a specific embodiment of the second aspect of the present invention provides a counterweight system 1. The counterweight system 1 includes a counterweight structure 20 and a battery pack 10 of any of the above embodiments; the battery pack 10 and the counterweight structure 20 are detachably connected.

[0080] Because the weight system 1 includes the battery pack 10 according to any of the above embodiments, it has at least the above advantages.

[0081] In addition, in this embodiment, the counterweight structure 20 is connected to the battery pack 10 as the counterweight system 1. Compared with the existing solution of installing the counterweight and the battery pack separately, this embodiment improves the space utilization, reduces the weight of the counterweight, and reduces the counterweight cost. The number of battery packs 10 and counterweight structures 20 can be changed at will according to needs to meet more design requirements and can be easily expanded to other types of electrical equipment.

[0082] In some embodiments, the counterweight structure 20 is disposed above and below the battery pack 10. The counterweight structure 20 includes a counterweight block 21, and a connecting component 200 is disposed on the side wall of the counterweight block 21 to facilitate detachable connection with the battery pack 10.

[0083] In the prior art, the side wall of the counterweight block 21 has a connecting component 200. In this embodiment, the connecting component 200 is provided on the battery pack, so that the battery pack 10 and the counterweight block 21 can be detachably connected without improving the connecting component of the counterweight block 21.

[0084] It should be noted that, for the convenience of description, in the specific embodiment of the present utility model, the connecting component 200 connected to the breeding block 21 is named as the counterweight connecting component, and the connecting component connected to the housing 100 is named as the battery connecting component. It can be understood that the breeding connecting component and the battery connecting component have the same structure, and the detachable connection between the counterweight block 21 and the battery pack 10 can be achieved without improving the connecting component of the counterweight block 21.

[0085] like Figure 7 As shown, in some embodiments, a second groove 211 is formed on the side wall of the counterweight block 21, and the matching connection component is disposed in the second groove 211 and connected to the counterweight block 21, thereby increasing the connection area.

[0086] In some embodiments, a hoisting member 22 is disposed on the upper side of the counterweight block 21 to facilitate hoisting the counterweight block 21 to complete the installation of the counterweight block 21 on the working machine body.

[0087] In some embodiments, a fourth mounting hole 23 is provided on the upper surface of the counterweight block 21, and the fourth mounting hole 23 is used to install a fastener. The counterweight block 21 is installed on the working machine body by the fastener, such as Figure 5 and Figure 6 shown.

[0088] In some embodiments, the counterweight structure 20 includes at least two counterweight blocks 21 , at least one of which is located above the battery pack 10 and is used to connect to the working machine body.

[0089] In some embodiments, the shape of the counterweight block 21 is the same as that of the battery pack 10 , making the counterweight system 1 more beautiful.

[0090] A specific embodiment of the third aspect of the present invention provides a working machine, which includes a working machine body 2 and a counterweight system 1 according to any of the above embodiments; the counterweight system 1 is connected to the working machine body 2 .

[0091] Since the working machine of this embodiment includes the counterweight system 1 of any of the above-mentioned embodiments, it has at least the above-mentioned advantages.

[0092] In a specific embodiment, the working machine body 2 is detachably connected to the counterweight block 21 by fasteners such as bolts and nuts. Specifically, the bolts pass through the mounting holes of the working machine body and the fourth mounting holes 23 to connect the working machine body 2 to the counterweight system 1.

[0093] In some embodiments, the working machine body 2 includes a mechanical claw, which is used to grab objects that need to be lifted; the counterweight system 1 is arranged at one end of the working machine body away from the mechanical claw, so as to improve the lifting performance of the working machine and reduce the counterweight cost of the working machine.

[0094] In a specific embodiment of the present utility model, the operating machine includes but is not limited to a crane or a crane. Specifically, the operating machine is a crane.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A battery pack, characterized in that: It comprises at least two bodies, the bodies are used as counterweights, and the bodies include: Housing (100); A connecting component (200) is connected to the housing (100), and the connecting component (200) is used to detachably connect two adjacent bodies.

2. The battery pack according to claim 1, characterized in that: The two bodies are stacked in a vertical direction.

3. The battery pack according to claim 1, characterized in that: The connecting component (200) comprises: A first connecting component (210), disposed on the housing (100); A second connecting component (220) is disposed on the housing (100), and the second connecting component (220) is disposed below the first connecting component (210); The first connecting component (210) is used for detachably connecting to the second connecting component (220) of the connecting component (200) adjacent above, and the second connecting component (220) is used for detachably connecting to the first connecting component (210) of the connecting component (200) adjacent below, so that the two upper and lower adjacent bodies are detachably connected.

4. The battery pack according to claim 3, characterized in that: Along the vertical direction, the first connecting component (210) is provided with a first mounting hole (201); the second connecting component (220) is provided with a second mounting hole (202), and the first mounting hole (201) and the second mounting hole (202) are coaxially arranged.

5. The battery pack according to claim 4, characterized in that: One of the first mounting hole (201) and the second mounting hole (202) is a U-shaped mounting hole.

6. The battery pack according to any one of claims 1 to 5, characterized in that: A first groove (113) is formed on the side wall of the housing (100), and the connecting component (200) is arranged in the first groove (113).

7. The battery pack according to claim 6, characterized in that: A flow channel is formed inside the shell wall of the shell (100), and a water inlet (111) and a water outlet (112) are provided on the shell wall, and the water inlet (111) and the water outlet (112) are both connected to the flow channel.

8. The battery pack according to claim 7, characterized in that: The housing (100) comprises: A bottom shell (110) is formed with a receiving cavity (101) therein, the flow channel is formed in the shell wall of the bottom shell (110), and the shell wall is provided with the water inlet (111) and the water outlet (112); A cover body (120) is arranged on the opening of the accommodating cavity (101) to close the accommodating cavity (101).

9. A counterweight system, characterized in that: It comprises a counterweight structure (20) and a battery pack (10) according to any one of claims 1 to 8; the battery pack (10) and the counterweight structure (20) are detachably connected.

10. A working machine, characterized in that: It comprises a working machine body (2), and the counterweight system (1) according to claim 9; the counterweight system (1) is connected to the working machine body (2).

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