battery

Abstract

The utility model relates to the technical field of energy storage, in particular to a battery. The battery comprises a cell group, a tab assembly and a pole assembly. The pole assembly comprises a main body and a plate body connected together, the plate body has a first plate surface and a second plate surface opposite to each other, and the second plate surface faces the cell group. The plate body comprises a first fuse part, a second fuse part and an intermediate part, the intermediate part is connected between the first fuse part and the second fuse part, one end of the main body is connected to the intermediate part, one end of the main body protrudes from the first plate surface in a direction away from the second plate surface, the first fuse part and the second fuse part are both provided with a fuse slot, the two fuse slots both penetrate through the first plate surface and the second plate surface, a first tab is connected to the second plate surface of the first fuse part, and a second tab is connected to the second plate surface of the second fuse part.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a battery. Background Technology

[0002] A battery is a device or system that stores electrical energy in the form of chemical energy and releases it back as electrical energy when needed. Batteries are a key component of modern energy systems, especially in the transition to renewable energy, and are one of the core infrastructures for building flexible, stable, clean, and efficient modern energy systems, playing an indispensable role in optimizing energy utilization. Battery packs typically consist of multiple batteries connected in series or parallel via aluminum batteries to power electrical equipment.

[0003] In the prior art, the pole is usually electrically connected to the tab through a connecting piece. In order to prevent safety problems caused by short circuit overload of the battery cell, a fuse structure is usually set on the connecting piece to cut off the circuit when the battery cell is short-circuited or overloaded. However, the connecting piece will make the connection space between the pole and the tab larger. Utility Model Content

[0004] This invention provides a battery for integrating a safety structure into the terminals.

[0005] This utility model provides a battery, comprising: A battery cell assembly, comprising a first battery cell and a second battery cell, wherein the first battery cell and the second battery cell are arranged side by side; A tab assembly, comprising a first tab and a second tab, wherein the first tab is electrically connected to the top of the first battery cell, and the second tab is electrically connected to the top of the second battery cell; and The electrode assembly includes a connected body and a plate, the plate having a first plate surface and a second plate surface facing away from each other, the second plate surface facing the battery cell assembly; The plate body includes a first safety part, a second safety part, and a middle part. The middle part is connected between the first safety part and the second safety part. One end of the main body is connected to the middle part. One end of the main body protrudes from the first plate surface in a direction away from the second plate surface. Both the first safety part and the second safety part are provided with fuse grooves. Both fuse grooves penetrate the first plate surface and the second plate surface. The first electrode is connected to the second plate surface of the first safety part, and the second electrode is connected to the second plate surface of the second safety part.

[0006] In some embodiments, the first plate surface of the middle portion is provided with an assembly groove, and one end of the main body is embedded in the assembly groove. In some embodiments, the assembly groove extends through the second plate surface of the middle portion, and the end face of the main body embedded in the end of the assembly groove is flush with the second plate surface.

[0007] In some embodiments, the pole assembly further includes a first limiting ring portion, which is connected to the body around the main body. The lateral dimension of the first limiting ring portion is larger than the lateral dimension of the assembly groove, and the first limiting ring portion abuts against the first plate surface.

[0008] In some embodiments, the plate is rectangular in shape, the fusion groove is rectangular in shape, and the two ends of the fusion groove are respectively adjacent to the two side edges of the plate.

[0009] In some embodiments, an insulating support member is also included, the insulating support member having a first surface and a second surface facing away from each other, the second surface facing the battery cell assembly; the second surface is provided with a first receiving groove, the plate body is embedded in the first receiving groove, the first receiving groove is provided with a through first hole, and the main body passes through the first through hole.

[0010] In some embodiments, the first receiving groove is provided with two limiting blocks, which are respectively located on both sides of the first through hole and are respectively embedded in the two fuse grooves. In some implementations, it also includes: A housing having a receiving cavity, the battery cell assembly being disposed within the receiving cavity; and A top cover is disposed on the top of the housing and is located on the side of the insulating support opposite to the battery cell assembly. The top cover has a second through hole, and the main body passes through the second through hole.

[0011] In some embodiments, the first surface of the insulating support member is further provided with a boss, the boss protruding from the first surface in a direction away from the second surface, and the first through hole penetrating the boss; The top cover has a second receiving groove on its surface facing the insulating support member, the second through hole penetrates the second receiving groove, and the boss is embedded in the second receiving groove.

[0012] In some embodiments, the pole assembly further includes a second limiting ring portion, which is connected to the main body around the main body; the top cover has a protruding ring on the surface opposite to the insulating support member, the protruding ring is arranged around the second through hole, one end of the main body opposite to the plate protrudes from the surface of the top cover opposite to the insulating support member, the second limiting ring portion abuts against the protruding ring, and the protruding ring is arranged around the second limiting ring portion.

[0013] This application provides a battery that, compared with the prior art, has at least the following advantages: The first battery cell is directly connected to the first fuse part of the board through the first electrode tab, and the second battery cell is directly connected to the second fuse part of the board through the second electrode tab. Both the first and second fuse parts are provided with fuse slots to form a fuse structure. The fuse structure is integrated on the terminal assembly, eliminating the need for connecting pieces between the electrode tab and the terminal assembly, which saves space while ensuring the fuse protection effect. Attached Figure Description

[0014] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the battery structure provided in the embodiments of this application; Figure 2 This is an exploded view of the battery provided in an embodiment of this application; Figure 3 This is a side view of the pole assembly provided in the embodiments of this application; Figure 4 This is a schematic diagram of the plate structure provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the insulating support provided in the embodiments of this application; Figure 6 This is a schematic diagram of the top cover provided in an embodiment of this application.

[0016] Figure label: 1-Battery; 11-Shell; 111-Receiving cavity; 12-Top cover; 121-Second through hole; 122-Second receiving groove; 123-Protruding ring; 13-Cell group; 131-First cell; 132-Second cell; 14-Electrode assembly; 141-First electrode; 142-Second electrode; 15-Pole post assembly; 151-Main body; 152-Plate body; 1521-First plate surface; 1522-Second plate surface; 1523-First safety part; 1524-Second safety part; 1525-Intermediate part; 1526-Fuse groove; 1527-Assembly groove; 153-First limiting ring part; 154-Second limiting ring part; 16-Insulating support; 161-First surface; 1611-Boss; 162-Second surface; 1621-First receiving groove; 1622-First through hole; 1623-Limiting block. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In this application, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0020] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0021] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4This application provides a battery 1, including a cell assembly 13, a tab assembly 14, and a terminal assembly 15. The cell assembly 13 includes a first cell 131 and a second cell 132, which are arranged side by side. The tab assembly 14 includes a first tab 141 and a second tab 142, with the first tab 141 electrically connected to the top of the first cell 131 and the second tab 142 electrically connected to the top of the second cell 132. The terminal assembly 15 includes a connected main body 151 and a plate 152. The plate 152 has a first plate surface 1521 and a second plate surface 1522 facing away from each other, with the second plate surface 1522 facing the cell assembly 13. The plate 152 includes a first fuse part 1523, a second fuse part 1524, and a middle part 1525. The middle part 1525 is connected between the first fuse part 1523 and the second fuse part 1524. One end of the main body 151 is connected to the middle part 1525. One end of 51 protrudes from the first plate surface 1521 in a direction away from the second plate surface 1522. Both the first safety part 1523 and the second safety part 1524 are provided with fuse grooves 1526. Both fuse grooves 1526 penetrate the first plate surface 1521 and the second plate surface 1522. The first electrode 141 is connected to the second plate surface 1522 of the first safety part 1523, and the second electrode 142 is connected to the second plate surface 1522 of the second safety part 1524.

[0022] The first fuse part 1523 has a through-hole fuse groove 1526, such that the distance between one side edge of the fuse groove 1526 and the same side edge of the first fuse part 1523 is smaller than the distance between the two sides edge of the first fuse part 1523, thus forming a fuse structure. When the current is too large, because the distance between one side edge of the fuse groove 1526 and the same side edge of the first fuse part 1523 is small, the temperature in this area will rise rapidly until it melts, so as to cut off the connection between the first fuse part 1523 and the middle part 1525, which also cuts off the connection between the first electrode 141 and the main body 151 of the electrode assembly 15, so that the first battery cell 131 is disconnected from the circuit.

[0023] Similarly, the second fuse part 1524 has a through-hole fuse groove 1526, such that the distance between one side edge of the fuse groove 1526 and the same side edge of the second fuse part 1524 is smaller than the distance between the two sides edge of the second fuse part 1524, thus forming a fuse structure. When the current is too large, because the distance between one side edge of the fuse groove 1526 and the same side edge of the second fuse part 1524 is small, the temperature in this area will rise rapidly until it melts, thereby cutting off the connection between the second fuse part 1524 and the middle part 1525, which also cuts off the connection between the second electrode 142 and the main body 151 of the electrode assembly 15, causing the second battery cell 132 to disconnect from the circuit.

[0024] In this embodiment, the first battery cell 131 is directly electrically connected to the first fuse part 1523 of the board 152 via the first tab 141, and the second battery cell 132 is directly electrically connected to the second fuse part 1524 of the board 152 via the second tab 142. Both the first fuse part 1523 and the second fuse part 1524 are provided with fuse slots 1526 to form a fuse structure. Compared with the prior art in which the electrode post is electrically connected to the tab via a connecting piece with an integrated fuse structure, the fuse structure is integrated on the electrode post assembly 15, eliminating the connecting piece between the tab and the electrode post assembly 15, which can save space while ensuring the fuse fuse effect.

[0025] Please refer to the following: Figure 3 and Figure 4 In some embodiments, the first plate surface 1521 of the middle part 1525 is provided with an assembly groove 1527, and one end of the main body 151 is embedded in the assembly groove 1527. In this embodiment, one end of the main body 151 is embedded in the assembly groove 1527, which realizes the electrical connection between the main body 151 and the plate 152, while enhancing the stability of the connection between the main body 151 and the plate 152.

[0026] Please continue reading. Figure 3 and Figure 4 In some embodiments, the assembly groove 1527 penetrates the second plate surface 1522 of the middle portion 1525, and the end face of the main body 151 embedded in the end of the assembly groove 1527 is flush with the second plate surface 1522.

[0027] The assembly groove 1527 passes through the first plate surface 1521 and the second plate surface 1522 of the middle part 1525. The end face of the main body 151 embedded in the end of the assembly groove 1527 is flush with the second plate surface 1522, which can prevent the main body 151 from protruding from the second plate surface 1522 and directly contacting the first battery cell 131 and the second battery cell 132.

[0028] Please continue reading. Figure 3 and Figure 4 In some embodiments, the pole assembly 15 further includes a first limiting ring portion 153, which is connected to the main body 151 around the first limiting ring portion 153. The lateral dimension of the first limiting ring portion 153 is larger than the lateral dimension of the assembly groove 1527, and the first limiting ring portion 153 abuts against the first plate surface 1521.

[0029] The lateral dimension of the first limiting ring 153 is larger than the lateral dimension of the assembly groove 1527, which can restrict the passage of the first limiting ring 153 through the assembly groove 1527. During the assembly process of the pole post assembly 15, the end of the main body 151 gradually inserts into the assembly groove 1527, and the distance between the first limiting ring 153 and the first plate surface 1521 gradually decreases until the first limiting ring 153 abuts against the first plate surface 1521, preventing the main body 151 from continuing to insert into the assembly groove 1527.

[0030] The first limiting ring 153 abuts against the first plate surface 1521, which plays a limiting role between the main body 151 and the plate 152, and can accurately determine the relative position between the main body 151 and the plate 152.

[0031] Please see Figure 4 In some embodiments, the plate 152 is rectangular in shape, the fuse groove 1526 is rectangular in shape, and the two ends of the fuse groove 1526 are respectively adjacent to the two side edges of the plate 152.

[0032] The fuse groove 1526 is configured as a rectangular structure, so that the two ends of the fuse groove 1526 can be close to the edges of the two sides of the plate 152 respectively, which reduces the distance between the ends of the fuse groove 1526 and the same side edge of the plate 152, thus ensuring that it can play a fuse protection role.

[0033] Please refer to the following: Figure 2 and Figure 5 In some embodiments, the battery 1 further includes an insulating support member 16, which has a first surface 161 and a second surface 162 facing away from each other. The second surface 162 faces the cell assembly 13 and is provided with a first receiving groove 1621. The plate body 152 is embedded in the first receiving groove 1621 and is provided with a through first through hole 1622. The main body 151 passes through the first through hole 1622.

[0034] Specifically, a first receiving groove 1621 is provided on the second surface 162 of the insulating support 16, and the plate 152 is embedded in the first receiving groove 1621, which can limit the position of the pole assembly 15 and accurately determine the relative position between the pole assembly 15 and the insulating support 16. A through hole 1622 is provided in the first receiving groove 1621, and the main body 151 passes through the first through hole 1622, so that the end of the main body 151 away from the body can be exposed through the first through hole 1622.

[0035] Please refer to the following: Figure 4 and Figure 5In some embodiments, the first receiving groove 1621 is provided with two limiting blocks 1623, which are located on both sides of the first through hole 1622 and are respectively embedded in the two fuse grooves 1526. A limiting block 1623 is provided in the first receiving groove 1621. The limiting block 1623 is embedded in the fuse groove 1526 of the plate 152, which can improve the efficiency of the plate 152 being embedded in the first receiving groove 1621, and further limit the plate 152 within the first receiving groove 1621, thereby improving the installation efficiency of the plate 152 being embedded in the first receiving groove 1621. For example, during the process of the plate 152 being embedded in the first receiving groove 1621, the installation position of the plate 152 can be determined simply by aligning the two fuse grooves 1526 with the two limiting blocks 1623 respectively.

[0036] Please see Figure 2 In some embodiments, the battery 1 further includes a housing 11 and a top cover 12. The housing 11 has a receiving cavity 111 in which the battery cell assembly 13 is disposed. The top cover 12 is disposed on the top of the housing 11 and is located on the side of the insulating support 16 opposite to the battery cell assembly 13. The top cover 12 has a second through hole 121 through which the main body 151 passes.

[0037] The central axis of the second through hole 121 is approximately coincident with the central axis of the first through hole 1622.

[0038] The top cover 12 has a second through hole 121, through which the main body 151 can pass. This allows the end of the main body 151 facing away from the plate 152 to be exposed through the second through hole 121, making it convenient to contact the main body 151 into the circuit.

[0039] Please refer to the following: Figure 2 , Figure 5 and Figure 6 In some embodiments, the first surface 161 of the insulating support member 16 is further provided with a boss 1611, the boss 1611 protruding from the first surface 161 in a direction away from the second surface 162, and the first through hole 1622 penetrating the boss 1611. The surface of the top cover 12 facing the insulating support member 16 is provided with a second receiving groove 122, the second through hole 121 penetrating the second receiving groove 122, and the boss 1611 is embedded in the second receiving groove 122.

[0040] A boss 1611 is provided on the first surface 161 of the insulating support member 16, and a second receiving groove 122 is provided on the top cover 12. During the installation of the insulating support member 16 and the top cover 12, the boss 1611 is embedded in the second receiving groove 122, thereby determining the relative position of the top cover 12 and the insulating support member 16.

[0041] Please refer to the following: Figure 2 and Figure 3 In some embodiments, the pole assembly 15 further includes a second limiting ring 154, which is connected to the main body 151. A protruding ring 123 is provided on the surface of the top cover 12 away from the insulating support member 16, and the protruding ring 123 is arranged around the second through hole 121. One end of the main body 151 away from the plate 152 protrudes from the surface of the top cover 12 away from the insulating support member 16. The second limiting ring 154 abuts against the protruding ring 123, and the protruding ring 123 is arranged around the second limiting ring 154.

[0042] A second limiting ring 154 is provided on the main body 151, and the second limiting ring 154 and the first limiting ring 153 are respectively located near the two ends of the main body 151.

[0043] The second limiting ring 154 has a larger lateral dimension than the second through hole 121, and a smaller lateral dimension than the convex ring 123. When the main body 151 passes through the second through hole 121, the second limiting ring 154 contacts the surface of the top cover 12 away from the insulating support 16, defining the relative position between the main body 151 and the top cover 12 in the direction of the axis of the second through hole 121. At the same time, the second limiting ring 154 contacts the convex ring 123, which surrounds and abuts against the second limiting ring 154, defining the relative position between the main body 151 and the top cover 12 in the direction perpendicular to the axis of the second through hole 121.

[0044] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: A battery cell assembly, comprising a first battery cell and a second battery cell, wherein the first battery cell and the second battery cell are arranged side by side; A tab assembly, the tab assembly including a first tab and a second tab, the first tab being electrically connected to the top of the first battery cell, and the second tab being electrically connected to the top of the second battery cell; as well as The electrode assembly includes a connected body and a plate, the plate having a first plate surface and a second plate surface facing away from each other, the second plate surface facing the battery cell assembly; The plate body includes a first safety part, a second safety part, and a middle part. The middle part is connected between the first safety part and the second safety part. One end of the main body is connected to the middle part. One end of the main body protrudes from the first plate surface in a direction away from the second plate surface. Both the first safety part and the second safety part are provided with fuse grooves. Both fuse grooves penetrate the first plate surface and the second plate surface. The first electrode is connected to the second plate surface of the first safety part, and the second electrode is connected to the second plate surface of the second safety part.

2. The battery according to claim 1, characterized in that, The first plate surface of the middle part is provided with an assembly groove, and one end of the main body is embedded in the assembly groove.

3. The battery according to claim 2, characterized in that, The assembly groove penetrates the second plate surface of the middle part, and the end face of the main body embedded in the end of the assembly groove is flush with the second plate surface.

4. The battery according to claim 2, characterized in that, The pole assembly further includes a first limiting ring portion, which is connected to the main body around the main body. The lateral dimension of the first limiting ring portion is larger than the lateral dimension of the assembly groove, and the first limiting ring portion abuts against the first plate surface.

5. The battery according to claim 1, characterized in that, The plate is rectangular in shape, and the fusion groove is rectangular in shape, with both ends of the fusion groove adjacent to the two side edges of the plate.

6. The battery according to any one of claims 1-5, characterized in that, It also includes an insulating support member having a first surface and a second surface facing away from each other, the second surface facing the battery cell assembly; the second surface is provided with a first receiving groove, the plate body is embedded in the first receiving groove, the first receiving groove is provided with a through first hole, and the main body passes through the first through hole.

7. The battery according to claim 6, characterized in that, The first receiving groove is provided with two limiting blocks, which are located on both sides of the first through hole and are respectively embedded in the two fuse grooves.

8. The battery according to claim 7, characterized in that, Also includes: A housing having a receiving cavity, wherein the battery cell assembly is disposed within the receiving cavity; as well as A top cover is disposed on the top of the housing and is located on the side of the insulating support opposite to the battery cell assembly. The top cover has a second through hole, and the main body passes through the second through hole.

9. The battery according to claim 8, characterized in that, The first surface of the insulating support member is further provided with a boss, the boss protruding from the first surface in a direction away from the second surface, and the first through hole penetrates the boss; The top cover has a second receiving groove on its surface facing the insulating support member, the second through hole penetrates the second receiving groove, and the boss is embedded in the second receiving groove.

10. The battery according to claim 8, characterized in that, The pole assembly further includes a second limiting ring portion, which is connected to the main body around the main body; the top cover has a protruding ring on the surface away from the insulating support member, which surrounds the second through hole; one end of the main body away from the plate protrudes from the surface of the top cover away from the insulating support member; the second limiting ring portion abuts against the protruding ring, and the protruding ring surrounds the second limiting ring portion.

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