Batteries, battery packs and energy storage cabinets

Abstract

The present application discloses a battery, a battery pack and an energy storage cabinet, the battery includes a shell, a battery cell assembly, a top cover assembly and a bar, the battery cell assembly is arranged in the shell, the top cover assembly includes a cover body and a pole, the cover body is arranged on the shell, and the cover body is provided with a first through hole, one end of the pole is electrically connected to the battery cell assembly, the other end of the pole is penetrated through the first through hole, along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the cover body, the bar includes a bar body and a first protrusion, the first protrusion is connected to the bar body, and the first protrusion at least partially extends into the first through hole and is electrically connected to the pole. The present application reduces the height of the pole by sinking the pole, while reducing the cost and making the structure of the top cover assembly more compact, when the overall height and size of the battery remain unchanged, due to the reduction in space occupied by the top cover assembly, the size of the part of the battery used to accommodate the battery cell assembly can be increased, thereby improving the capacity and energy density of the battery.

Description

Technical Field

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

[0002] Batteries are mainly divided into three categories according to the different packaging shapes: cylindrical, soft-pack and square shell. Among them, square shell batteries mainly include shells, cell components and top cover components. The top cover component and shell are used to package the cell components. The cell components include one or more bare cells. The tabs of the bare cells are connected to the poles of the top cover components through connecting pieces. The cells are responsible for storing electrical energy and converting chemical energy into electrical energy through chemical reactions. The poles can be used as the positive or negative poles of the battery to transmit current. The capacity and energy density of the battery are important indicators for evaluating battery performance. Utility Model Content

[0003] In order to overcome the problems existing in the above-mentioned prior art, the main purpose of the present application is to provide a battery, a battery pack and an energy storage cabinet that can improve the capacity and energy density of the battery.

[0004] In order to achieve the above objectives, this application specifically adopts the following technical solutions:

[0005] A battery comprising:

[0006] case;

[0007] A battery cell assembly, wherein the battery cell assembly is disposed in the housing;

[0008] A top cover assembly, the top cover assembly comprising a cover body and a pole, the cover body is covered on the shell, and the cover body is provided with a first through hole, one end of the pole is electrically connected to the battery core assembly, the other end of the pole is passed through the first through hole, and along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the cover body;

[0009] The bar piece includes a bar piece body and a first protrusion, the first protrusion is connected to the bar piece body, and the first protrusion at least partially extends into the first through hole to be electrically connected to the pole.

[0010] In some embodiments, a recessed portion is provided on the upper surface of the pole, and the bar also includes a second raised portion, which is connected to the first raised portion, and the second raised portion at least partially extends into the recessed portion and adheres to the bottom wall of the recessed portion.

[0011] In some embodiments, the second protrusion is provided with a first position limiting portion, and the recessed portion is provided with a first position limiting matching portion, and the first position limiting portion and the first position limiting matching portion can cooperate with each other to limit position.

[0012] In some embodiments, the first limiting portion is configured as a limiting protrusion, and the first limiting matching portion is configured as a limiting groove; or,

[0013] The first limiting portion is configured as a limiting groove, and the first limiting matching portion is configured as a limiting protrusion.

[0014] In some embodiments, the cover body includes a top patch and a top cover plate, the top cover plate is covered on the shell, the top patch is connected to the side of the top cover plate facing away from the shell, the top patch is provided with the first through hole, the top cover plate is provided with the second through hole, the first through hole and the second through hole are arranged correspondingly, the pole is passed through the first through hole and the second through hole, and along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the top patch.

[0015] In some embodiments, along the height extension direction of the shell, the upper surface of the pole is 0.5mm to 3mm lower than the upper surface of the top patch, the upper surface of the pole is 0mm to 2mm lower than the upper surface of the top cover plate, or the upper surface of the pole is 0.01mm to 1mm higher than the upper surface of the top cover plate.

[0016] In some embodiments, the top cover plate is provided with a first groove, the bottom of the first groove is provided with the second through hole, and the cover body further includes an insulating member, the insulating member is sleeved on the pole and located in the first groove.

[0017] In some embodiments, the insulating member is provided with a second position limiting portion, and the pole is provided with a second position limiting matching portion, and the second position limiting portion and the second position limiting matching portion can cooperate with each other for position limiting.

[0018] In some embodiments, the cover body also includes a connecting plate, which is located between the battery cell assembly and the top cover plate, and the connecting plate is electrically connected to the battery cell assembly. The connecting plate is provided with a first recess, and the position of the first recess is corresponding to the position of the first through hole. One end of the pole is connected to the connecting plate and is located in the first recess.

[0019] In some embodiments, the height of the pole is 1 mm to 6 mm.

[0020] A battery pack comprises a battery pack shell and a plurality of battery modules, wherein the plurality of battery modules are respectively arranged in the battery pack shell, and each of the battery modules respectively comprises a plurality of batteries described in any one of the above items.

[0021] An energy storage cabinet comprises an inverter, a battery management system and the battery pack mentioned above.

[0022] The present application discloses a battery, which includes a shell, a battery cell assembly, a top cover assembly and a tab, wherein the battery cell assembly is arranged in the shell, the top cover assembly includes a cover body and a pole, the cover body is arranged on the shell, and the cover body is provided with a first through hole, one end of the pole is electrically connected to the battery cell assembly, and the other end of the pole is passed through the first through hole, along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the cover body, the tab includes a tab body and a first protrusion, the first protrusion is connected to the tab body, and the first protrusion at least partially extends into the first through hole to be electrically connected to the pole. In the present application, along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the cover body. By sinking the pole, the height of the pole is reduced, which reduces the cost and makes the structure of the top cover assembly more compact, thereby reducing the space occupied by the top cover assembly. When the overall height and size of the battery remain unchanged, the space occupied by the top cover assembly is reduced, so the size of the part of the battery used to accommodate the electrolyte and the battery cell assembly can be increased, thereby improving the capacity and energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of a battery provided in an embodiment of the present application;

[0024] Figure 2 A cross-sectional view of a first embodiment of a top cover assembly of a battery provided in an embodiment of the present application;

[0025] Figure 3 A cross-sectional view of a second embodiment of a top cover assembly of a battery provided in an embodiment of the present application;

[0026] Figure 4 A cross-sectional view of a third embodiment of a top cover assembly of a battery provided in an embodiment of the present application;

[0027] Figure 5 A schematic structural diagram of a first embodiment of a battery pole provided in an embodiment of the present application;

[0028] Figure 6 A schematic structural diagram of a second embodiment of a battery pole provided in an embodiment of the present application;

[0029] Figure 7 A schematic structural diagram of a third embodiment of a battery pole provided in an embodiment of the present application;

[0030] Figure 8 A schematic structural diagram of a fourth embodiment of a battery electrode provided in an embodiment of the present application;

[0031] Fig. 9 An exploded view of a top cover assembly of a battery provided in an embodiment of the present application;

[0032] Fig.10 A schematic diagram of the structure of a battery pole provided in an embodiment of the present application;

[0033] Fig.11 A schematic diagram of the structure of an insulating member of a battery provided in an embodiment of the present application;

[0034] Fig.12 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0035] Fig.13 A schematic diagram of the structure of the energy storage cabinet provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1. Shell; 11. Accommodating chamber;

[0038] 2. Top cover assembly; 21. Cover body; 21a. First end; 21b. Second end; 210. Top patch; 210a. First through hole; 211. Top cover plate; 211a. First groove; 211b. Second through hole; 212. Isolation plate; 212a. Second groove; 212b. Third through hole; 213. Connecting piece; 213a. First connecting area; 213b. Second connecting area; 213c. First depression; 214. Insulating member; 214a. Second limiting portion; 215. Sealing member; 22. Pole; 22a. Positive pole; 22b. Negative pole; 220. Concave portion; 220a. First limiting matching portion; 220b. First inclined surface; 220c. Concave portion; 221. Second limiting matching portion;

[0039] 3. bar piece; 31. bar piece body; 32. first raised portion; 33. second recess; 34. reinforcing rib; 35. second raised portion;

[0040] 4. Battery cell components;

[0041] 100. Battery;

[0042] 200, battery pack; 201, battery pack housing; 202, battery module;

[0043] 300. Energy storage cabinet. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more, and the term "multiple" refers to two or more; the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral 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 this application can be understood according to specific circumstances.

[0046] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0047] In the prior art, one end of the pole is connected to the pole ear of the battery cell assembly through a connecting plate, and the other end of the pole protrudes from the top cover assembly. In the relevant pole, the pole protrudes from the upper surface of the top cover assembly by about 5 mm.

[0048] Reference Figure 1 and Figure 2 As shown, Figure 1 A perspective view of a battery provided in an embodiment of the present application, Figure 2 A cross-sectional view of a first embodiment of a top cover assembly of a battery provided in an embodiment of the present application. This embodiment discloses a battery 100, which includes a housing 1, a cell assembly 4, a top cover assembly 2 and a tab 3, wherein the housing 1 is provided with a receiving cavity 11 for receiving an electrolyte.

[0049] The battery cell assembly 4 is disposed in the accommodating cavity 11 . The battery cell assembly 4 is used to store electrical energy and can convert chemical energy into electrical energy to provide to electrical equipment.

[0050] The top cover assembly 2 includes a cover body 21 and a pole 22. The cover body 21 is covered on the shell 1. The cover body 21 is used to protect the interior of the battery 100 from the invasion of external dust, moisture and other impurities, thereby preventing corrosion, short circuit and other unexpected conditions from occurring inside the battery 100, so as to ensure the long-term stable working performance of the battery 100 and improve the service life of the battery 100. The cover body 21 is provided with a first through hole 210a.

[0051] One end of the pole 22 is electrically connected to the battery cell assembly 4, and the other end of the pole 22 is inserted into the first through hole 210a. Along the height extension direction of the shell 1, the upper surface of the pole 22 is lower than the upper surface of the cover 21, wherein the height H of the pole 22 is 1 mm to 6 mm, and the height extension direction of the shell 1 is Figure 2 The X direction in .

[0052] The tab 3 includes a tab body 31 and a first protrusion 32. The first protrusion 32 is connected to the tab body 31, and at least partially extends into the first through hole 210a to be electrically connected to the pole 22. The tab 3 is used to connect the battery 100 cells and collect and transmit current.

[0053] In the present embodiment, the first protrusion 32 and the flap body 31 are integrally formed to facilitate manufacturing. It is understandable that in other embodiments, the first protrusion 32 and the flap body 31 may also be separate structures.

[0054] In this embodiment, the size of the area of ​​the battery 100 used to accommodate the electrolyte and the battery cell assembly 4 is 204mm~207mm, which is 1mm~3mm larger than that of conventional batteries. Compared with conventional batteries, the capacity can be increased by 2%~3%, thereby improving the capacity and energy density of the battery 100.

[0055] In the present embodiment, the height H of the pole 22 is 2 mm to 4 mm. Specifically, the height H of the pole 22 may be 2.5 mm, 3 mm, 3.5 mm, 3.75 mm, etc.

[0056] In this embodiment, the tab 3 is made of aluminum. The aluminum tab is light in weight, low in cost, and has strong anti-corrosion and anti-oxidation properties, ensuring the stability of the connection between multiple battery cells 100. It can be understood that in other embodiments, the tab 3 can also be made of other materials, such as copper, silver, or a mixed metal containing the above metals.

[0057] In this embodiment, along the height extension direction of the shell 1, the upper surface of the pole 22 is lower than the upper surface of the cover body 21. By sinking the pole 22, the height of the pole 22 is reduced, which reduces the cost and makes the structure of the top cover assembly 2 more compact, thereby reducing the space occupied by the top cover assembly 2. When the overall height and size of the battery 100 remain unchanged, since the space occupied by the top cover assembly 2 is reduced, the size of the part of the battery 100 used to accommodate the electrolyte and the battery cell assembly 4 can be increased, thereby improving the capacity and energy density of the battery 100.

[0058] Reference Figure 1 and Figure 3 As shown, Figure 3A cross-sectional view of the second embodiment of the top cover assembly of the battery provided in the embodiment of the present application. In some embodiments, the tab body 31 is formed with a first protrusion 32 on one side and a second recess 33 on the other side by stamping or stretching, so as to facilitate processing, reduce the weight of the tab 3, and reduce costs. The tab 3 also includes a reinforcing rib 34, which is connected to the tab body 31 and is located in the second recess 33. The reinforcing rib 34 is used to enhance the structural strength of the connection position between the tab 3 and the pole 22, thereby reducing the possibility of damage to the connection position and enhancing the stability of the connection between the tab 3 and the pole 22.

[0059] Reference Figure 4 As shown, Figure 4 A cross-sectional view of a third embodiment of a top cover assembly of a battery provided in an embodiment of the present application. In some embodiments, a recessed portion 220 is provided on the upper surface of the pole 22, and the tab 3 further includes a second protruding portion 35, the second protruding portion 35 is connected to the first protruding portion 32, and the second protruding portion 35 at least partially extends into the recessed portion 220 and fits against the bottom wall of the recessed portion 220.

[0060] In this embodiment, the second protrusion 35, the first protrusion 32 and the flap body 31 are integrally formed to facilitate manufacturing. It can be understood that in other embodiments, the second protrusion 35, the first protrusion 32 and the flap body 31 can also be a split structure.

[0061] In this embodiment, the recessed portion 220 cooperates with the second raised portion 35 to improve the relative position accuracy between the tab 3 and the pole 22, and increases the contact area between the tab 3 and the pole 22, thereby improving the stability of the connection between the tab 3 and the pole 22. At the same time, increasing the contact area between the tab 3 and the pole 22 can reduce resistance, thereby helping to reduce heat generation and increase the service life of the battery 100.

[0062] Reference Figure 5 As shown, Figure 5 A schematic diagram of the structure of the first embodiment of the pole of the battery provided in the embodiment of the present application. In some embodiments, the second protrusion 35 is provided with a first limiting portion, and the recessed portion 220 is provided with a first limiting matching portion 220a, and the first limiting portion and the first limiting matching portion 220a can cooperate to limit, so as to prevent the tab 3 and the pole 22 from rotating relative to each other, and ensure the stability of the connection between the tab 3 and the pole 22.

[0063] In this embodiment, the first limiting portion is set as a limiting protrusion, and the first limiting matching portion 220a is set as a limiting groove. The limiting protrusion and the limiting groove can cooperate to limit. It can be understood that in other embodiments, the first limiting portion can also be set as a limiting groove, and the first limiting matching portion 220a can be set as a limiting protrusion.

[0064] Reference Figure 6 As shown, Figure 6 A schematic diagram of the structure of the second embodiment of the pole of the battery provided in the embodiment of the present application. The shape of the recessed portion 220 is set corresponding to the shape of the second raised portion 35, the recessed portion 220 is set as a string-shaped groove, and the second raised portion 35 is set as a string-shaped protrusion. It can be understood that in other embodiments, the recessed portion 220 can also be set as a square groove, and the second raised portion 35 is set as a square protrusion, or the recessed portion 220 can also be set as a polygonal groove, and the second raised portion 35 is set as a polygonal protrusion, or the recessed portion 220 can also be set as a Y-shaped groove, and the second raised portion 35 is set as a Y-shaped protrusion.

[0065] Reference Figure 7 As shown, Figure 7 A schematic diagram of the structure of the third embodiment of the pole of the battery provided by the embodiment of the present application. The side wall of the recessed portion 220 is set as a first inclined surface 220b, and the opening of the end of the recessed portion 220 away from the bottom of the pole 22 is larger than the opening of the end of the recessed portion 220 close to the bottom of the pole 22, so that the recessed portion 220 is trumpet-shaped, so as to facilitate the second protrusion 35 to extend into the recessed portion 220, thereby facilitating the connection between the bar 3 and the pole 22. The outer wall of the second protrusion 35 is set as a second inclined surface, and the second inclined surface is arranged in coordination with the first inclined surface 220b. When the pole 22 and the bar 3 are connected, the first inclined surface 220b abuts against the second inclined surface.

[0066] Reference Figure 8 As shown, Figure 8 A schematic diagram of the structure of the fourth embodiment of the pole of the battery provided by the embodiment of the present application. A groove 220c is provided on the bottom surface of the recessed portion 220, so that the side wall of the recessed portion 220 forms a stepped structure, and the outer wall of the second protrusion 35 is arranged in cooperation with the side wall of the recessed portion 220, which increases the contact area between the tab 3 and the pole 22, improves the stability of the connection between the tab 3 and the pole 22, and at the same time, increasing the contact area between the tab 3 and the pole 22 can reduce the resistance, which is conducive to reducing the heat generation and improving the service life of the battery 100.

[0067] In this embodiment, the shape of the recessed portion 220 is arranged to correspond to the shape of the second raised portion 35 to ensure that the inner wall of the recessed portion 220 can fit the outer wall of the second raised portion 35, thereby increasing the contact area between the bar piece 3 and the pole 22 and ensuring the stability of the connection between the bar piece 3 and the pole 22.

[0068] Reference Figure 1 and Fig. 9 As shown, Fig. 9An exploded view of the top cover assembly of the battery provided in the embodiment of the present application. The cover body 21 is provided with a first end 21a and a second end 21b. The cover body 21 includes a top patch 210, a top cover plate 211, an isolation plate 212 and a connecting plate 213. The isolation plate 212 is covered on the shell 1, and the two ends of the isolation plate 212 are respectively provided with a third through hole 212b. The top cover plate 211 is connected to the side of the isolation plate 212 facing away from the shell 1, and the two ends of the top cover plate 211 are respectively provided with a second through hole 211b. The top patch 210 is connected to the side of the top cover plate 211 facing away from the isolation plate 212. The top patch 210 plays an insulating role to prevent the battery 100 from being short-circuited with other circuits, and the top patch 210 can protect the top cover plate 211 to prevent the top cover plate 211 from being directly impacted by external forces. The two ends of the top patch 210 are respectively provided with a first through hole 210a.

[0069] The first through hole 210a, the second through hole 211b and the third through hole 212b of the first end 21a are respectively arranged correspondingly, and the first through hole 210a, the second through hole 211b and the third through hole 212b of the second end 21b are respectively arranged correspondingly, and the pole 22 includes a positive pole 22a and a negative pole 22b, and the positive pole 22a is penetrated through the first through hole 210a, the second through hole 211b and the third through hole 212b of the first end 21a, and the negative pole 22b is penetrated through the first through hole 210a, the second through hole 211b and the third through hole 212b of the second end 21b. Along the height extension direction of the shell 1, the upper surface of the pole 22 is lower than the upper surface of the top patch 210.

[0070] The connecting piece 213 is located between the battery cell assembly 4 and the isolation plate 212, and there are two connecting pieces 213, which are respectively arranged at the first end 21a and the second end 21b, and each connecting piece 213 includes a first connecting area 213a and a second connecting area 213b, respectively. The first connecting area 213a is electrically connected to the battery cell assembly 4, and the second connecting area 213b is provided with a first recess 213c. The position of the first recess 213c is arranged corresponding to the position of the first through hole 210a. One end of the pole 22 is connected to the connecting piece 213 and is located in the first recess 213c, so that the pole 22 is electrically connected to the battery cell assembly 4 through the connecting piece 213.

[0071] In this embodiment, along the height extension direction of the shell 1, the upper surface of the pole 22 is 0.5mm to 3mm lower than the upper surface of the top patch 210. Specifically, the upper surface of the pole 22 can be 0.6mm, 1mm, 1.3mm, 1.8mm, 2.4mm, 2.7mm, etc. lower than the upper surface of the top patch 210.

[0072] In this embodiment, the upper surface of the pole 22 is 0 mm to 2 mm lower than the upper surface of the top cover plate 211. Specifically, the upper surface of the pole 22 can be 0.5 mm, 0.7 mm, 1.2 mm, 1.6 mm, etc. lower than the upper surface of the top cover plate 211. It can be understood that in other embodiments, the upper surface of the pole 22 can also be 0.01 mm to 1 mm higher than the upper surface of the top cover plate 211. Specifically, the upper surface of the pole 22 can be 0.05 mm, 0.4 mm, 0.67 mm, 0.83 mm, etc. higher than the upper surface of the top cover plate 211.

[0073] In this embodiment, the isolation plate 212 is made of plastic material and plays an insulating role, thereby preventing a short circuit between the battery 100 casing and the battery cell assembly 4 and ensuring the normal operation of the battery 100.

[0074] The connecting piece 213 of the present embodiment is provided with a first recess 213c, one end of the pole 22 is connected to the connecting piece 213 and is located in the first recess 213c. By sinking the connecting piece 213 to accommodate the pole 22, the compactness of the structure of the top cover assembly 2 is further increased, so that when the overall height and size of the battery 100 remain unchanged, the size of the part of the battery 100 used to accommodate the electrolyte and the battery cell assembly 4 is further increased, thereby further improving the capacity and energy density of the battery 100.

[0075] Reference Figure 2 , Fig. 9 , Fig.10 and Fig.11 As shown, Fig.10 A schematic diagram of the structure of a battery pole provided in an embodiment of the present application, Fig.11 A schematic diagram of the structure of the insulating member of the battery provided in the embodiment of the present application. The top cover plate 211 is provided with a first groove 211a, and a second through hole 211b is provided at the bottom of the first groove 211a. The isolation plate 212 is provided with a second groove 212a, and a third through hole 212b is provided at the bottom of the second groove 212a. The cover body 21 also includes an insulating member 214 and a sealing member 215. The insulating member 214 is sleeved on the pole 22 and is located in the first groove 211a. The insulating member 214 is used to protect the pole 22 and prevent short circuit, and the insulating member 214 is provided with a second limiting portion 214a, and the pole 22 is provided with a second limiting matching portion 221. The second limiting portion 214a and the second limiting matching portion 221 can cooperate to limit the pole 22 in the height extension direction of the shell 1. The seal 215 is sleeved on the pole 22 and located in the second groove 212a. The seal 215 plays a role of sealing and insulation. The seal 215 is used to prevent the electrolyte in the accommodating cavity 11 from flowing out from the third through hole 212b, thereby ensuring the sealing of the battery 100.

[0076] In this embodiment, the second limiting portion 214a is set as a limiting protrusion, and the second limiting matching portion 221 is set as a limiting groove. The limiting protrusion and the limiting groove can cooperate to limit. It can be understood that in other embodiments, the second limiting portion 214a can also be set as a limiting groove, and the second limiting matching portion 221 can be set as a limiting protrusion.

[0077] Reference Fig.12 As shown, Fig.12 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application. Based on the present embodiment, a battery pack 200 is also disclosed, the battery pack 200 includes a battery pack housing 201 and a plurality of battery modules 202, the plurality of battery modules 202 are respectively arranged in the battery pack housing 201, and each battery module 202 includes a plurality of batteries 100 of any of the above embodiments.

[0078] Reference Fig.13 As shown, Fig.13 This is a schematic diagram of the structure of the energy storage cabinet provided in the embodiment of the present application. This embodiment also discloses an energy storage cabinet 300, which includes an inverter, a battery management system and the battery pack 200 described above.

[0079] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery, characterized in that: include: case; A battery cell assembly, wherein the battery cell assembly is disposed in the housing; A top cover assembly, the top cover assembly comprising a cover body and a pole, the cover body is covered on the shell, and the cover body is provided with a first through hole, one end of the pole is electrically connected to the battery core assembly, the other end of the pole is passed through the first through hole, and along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the cover body; The bar piece includes a bar piece body and a first protrusion, the first protrusion is connected to the bar piece body, and the first protrusion at least partially extends into the first through hole to be electrically connected to the pole.

2. The battery according to claim 1, characterized in that A recessed portion is provided on the upper surface of the pole, and the bar also includes a second raised portion, which is connected to the first raised portion, and the second raised portion at least partially extends into the recessed portion and fits against the bottom wall of the recessed portion.

3. The battery according to claim 2, characterized in that The second protruding portion is provided with a first position limiting portion, and the recessed portion is provided with a first position limiting matching portion, and the first position limiting portion and the first position limiting matching portion can cooperate with each other to limit position.

4. The battery according to claim 3, characterized in that The first limiting portion is configured as a limiting protrusion, and the first limiting matching portion is configured as a limiting groove; or, The first limiting portion is configured as a limiting groove, and the first limiting matching portion is configured as a limiting protrusion.

5. The battery according to claim 1, characterized in that The cover body includes a top patch and a top cover plate, the top cover plate is covered on the shell, the top patch is connected to the side of the top cover plate facing away from the shell, the top patch is provided with the first through hole, the top cover plate is provided with the second through hole, the first through hole and the second through hole are arranged correspondingly, the pole is penetrated by the first through hole and the second through hole, and along the height extension direction of the shell, the upper surface of the pole is lower than the upper surface of the top patch.

6. The battery according to claim 5, characterized in that Along the height extension direction of the shell, the upper surface of the pole is 0.5 mm to 3 mm lower than the upper surface of the top patch; The upper surface of the pole is 0 mm to 2 mm lower than the upper surface of the top cover plate, or the upper surface of the pole is 0.01 mm to 1 mm higher than the upper surface of the top cover plate.

7. The battery according to claim 5, characterized in that The top cover plate is provided with a first groove, the bottom of the first groove is provided with the second through hole, and the cover body further comprises an insulating member, the insulating member is sleeved on the pole and located in the first groove.

8. The battery according to claim 7, characterized in that The insulating member is provided with a second position limiting portion, and the pole is provided with a second position limiting matching portion, and the second position limiting portion and the second position limiting matching portion can cooperate with each other to limit position.

9. The battery according to claim 5, characterized in that The cover body also includes a connecting plate, which is located between the battery cell assembly and the top cover plate, and is electrically connected to the battery cell assembly. The connecting plate is provided with a first recess, and the position of the first recess is corresponding to the position of the first through hole. One end of the pole is connected to the connecting plate and is located in the first recess.

10. The battery according to any one of claims 1 to 9, characterized in that: The height of the pole is 1 mm to 6 mm.

11. A battery pack, characterized in that: It comprises a battery pack shell and a plurality of battery modules, wherein the plurality of battery modules are respectively arranged in the battery pack shell, and each of the battery modules respectively comprises a plurality of batteries according to any one of claims 1 to 10.

12. An energy storage cabinet, characterized in that: The invention comprises an inverter, a battery management system and a plurality of battery packs as claimed in claim 11.

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