Connecting piece structure and battery

Abstract

Provided in the present application are a connecting piece structure and a battery. The connecting piece structure comprises a terminal post connecting portion, a first tab connecting portion and a second tab connecting portion. The terminal post connecting portion is configured to be connected to a terminal post; the first tab connecting portion is connected to the terminal post connecting portion, and the first tab connecting portion is connected to a first tab of one cell core; and the second tab connecting portion is connected to the terminal post connecting portion, and the second tab connecting portion is connected to a first tab of the other cell core. The present application has the advantages of simple connection and high cell core utilization rate.

Description

A connecting sheet structure and a battery

[0001] The present application claims priority to the Chinese patent application No. 202421880183.6, filed on August 5, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a connecting sheet structure and a battery. BACKGROUND

[0003] In the related art, during the assembly of a battery, the tab of the battery is first welded to the core package, and then the connecting sheet is welded to the core package. The positive tab of the core package and the negative tab of the core package are respectively welded to the positive tab of the connecting sheet and the negative tab of the connecting sheet. SUMMARY

[0004] In a double-layer core package, two core packages need to be connected through an additional structure, the volume utilization rate of the core package is low, the structure is complex, and the overcurrent circuit is increased.

[0005] Embodiments of the present application provide a connecting sheet structure, comprising:

[0006] a pole connecting portion configured to be connected with a pole;

[0007] a first tab connecting portion connected with the pole connecting portion, the first tab connecting portion being configured to connect a first tab of one core package; and

[0008] a second tab connecting portion connected with the pole connecting portion, the second tab connecting portion being configured to connect a first tab of another core package.

[0009] Embodiments of the present application provide a battery, comprising:

[0010] two core packages arranged side by side, each of the core packages comprising a first tab and a second tab, the first tab and the second tab being located on the same side;

[0011] a cover plate provided with a pole

[0012] two connecting sheet structures connected to the two core packages and the cover plate. ADVANTAGEOUS EFFECTS

[0013] The connecting piece structure provided in the application has simple structure, simple preparation process and convenient installation. The first tab connecting part is arranged to be connected to the first tab of any one of the core packs, and the second tab connecting part is arranged to be connected to the first tab of the other core pack. The first tabs of two core packs are connected by one connecting piece structure, without the need of arranging an additional structure for connection, thereby saving materials, shortening the overcurrent path, improving the utilization rate of the core pack and saving materials. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is a structural schematic view of some embodiments of the connecting piece structure (in an unbent state) provided in the application;

[0015] Fig. 2 is a structural schematic view of some embodiments of the connecting piece structure (in a bent state) provided in the application;

[0016] Fig. 3 is a front view of Fig. 2;

[0017] Fig. 4 is a structural schematic view of some embodiments of the battery provided in the application;

[0018] Fig. 5 is a front view of the battery in Fig. 4;

[0019] Fig. 6 is a structural schematic view of some other embodiments of the battery in Fig. 4;

[0020] Fig. 7 is a structural schematic view of some other embodiments of the battery in Fig. 4.

[0021] LIST OF ELEMENTS IN THE DRAWINGS

[0022] LIST OF ELEMENTS IN THE DRAWINGS Embodiments of the application

[0023] In the related art, during the assembly of a battery, the tabs of the battery are first welded to the core packs, and then the connecting piece is welded to the core packs. The positive tabs of the core packs and the negative tabs of the core packs are respectively welded to the positive tabs of the connecting piece and the negative tabs of the connecting piece. In a double-layer core pack, two core packs need to be connected by an additional structure. The volume utilization rate of the core pack is low, the structure is complex, and the overcurrent path is long.

[0024] In view of this, the application provides a connecting sheet structure 100. FIGS. 1-3 are structural schematic diagrams of an embodiment of the connecting sheet structure 100 provided by the application. The connecting sheet structure 100 provided by the application is simple in structure, convenient to install, can save materials, and shorten the overcurrent path. The connecting sheet structure 100 will be described in detail below in combination with the main drawings.

[0025] Referring to FIGS. 1, 2 and 3, the connecting sheet structure 100 includes a pole post connecting portion 101, a first tab connecting portion 102 and a second tab connecting portion 103. The pole post connecting portion 101 is arranged to be connected with a pole post. The first tab connecting portion 102 is connected with the pole post connecting portion 101, and the first tab connecting portion 102 is arranged to connect a first tab 201 of one core pack 200. The second tab connecting portion 103 is connected with the pole post connecting portion 101, and the second tab connecting portion 103 is arranged to connect a first tab 201 of another core pack 200.

[0026] In the connecting sheet structure 100 provided by the application, the structure is simple, the preparation process is simple, and the installation is convenient. The first tab connecting portion 102 is arranged to be connected with the first tab 201 of any core pack 200, and the second tab connecting portion 103 is arranged to be connected with the first tab 201 of another core pack 200. The first tabs 201 of two core packs are connected by one connecting sheet structure 100, without the need to arrange an additional structure for connection, thereby saving materials and shortening the overcurrent path, improving the utilization rate of the core pack 200, and saving materials.

[0027] The connecting sheet structure 100 provided in the embodiment is used to connect two core packs 200. Specifically, each core pack 200 includes a first tab 201 and a second tab 202, the first tab 201 and the second tab 202 are located on the same side, and the polarities of the first tab 201 and the second tab 202 are opposite. Two connecting sheet structures 100 are arranged, one of which connects two first tabs 201, and the other of which connects two second tabs 202.

[0028] It should be noted that in order to ensure the connection strength, the first lug connecting portion 102 is welded with the first lug 201, and the second lug connecting portion 103 is welded with another first lug 201. In the welding process, ultrasonic welding process is often used for welding. Due to the particularity of ultrasonic welding process, the first lug 201 is pulled during welding, which causes the first lug 201 to deform or tear. In the embodiment, please refer to FIG. 1, FIG. 2 and FIG. 3, the first lug connecting portion 102 includes a first supporting section 104 and a first bending section 105. The first supporting section 104 is connected with the pole connecting portion 101, and the first bending section 105 is arranged at a preset angle with the plane where the first supporting section 104 is located. A first space is formed between the first supporting section 104 and the first bending section 105, the first lug 201 is arranged in the first space, and the first supporting section 104 and the first bending section 105 are located on both sides of the first lug 201. During welding, the first supporting section 104 is located on one side of the first lug 201, and the first bending section 105 is located on the other side of the first lug 201. The first supporting section 104 and the first bending section 105 protect the first lug 201, avoiding the first lug 201 being torn during welding, thereby improving the connection strength of the connecting sheet structure 100 and the core pack 200.

[0029] Please refer to FIG. 2 and FIG. 3, the projection of the first bending section 105 on the first supporting section 104 partially overlaps the first supporting section 104. It should be noted that during welding, the first bending section 105 only needs to cover the first lug 201. However, considering the space utilization rate, welding effect, connection strength and the like, in some embodiments, the first bending section 105 completely covers the first lug 201, that is, the first bending section 105 and the first supporting section 104 are arranged in a superposed manner, and are in a parallel state with each other. Specifically, during actual operation, the first supporting section 104 and the first bending section 105 are in the same horizontal plane. The first lug 201 is first placed on the first supporting section 104, and then the first bending section 105 is bent to cover the first lug 201. At this time, the first supporting section 104 and the first bending section 105 clamp the first lug 201 therebetween. In this way, the first lug 201 can be well protected to avoid tearing during welding. In addition, the clamping of the first supporting section 104 and the first bending section 105 can achieve pre-fixing, avoiding the first lug 201 from being offset during welding, which causes the first lug to tear.

[0030] Similarly, in some embodiments, referring to FIG. 2 and FIG. 3, the second lug connecting part 103 comprises a second supporting section 106 and a second bending section 107, the second supporting section 106 is connected with the pole connecting part 101, and the second bending section 107 is arranged at a preset angle with the plane where the second supporting section 106 is located. Specifically, a second space is formed between the second supporting section 106 and the second bending section 107, and the first lug 201 of the other core pack 200 is located in the second space, so that the second supporting section 106 and the second bending section 107 are located on both sides of the first lug 201 of the other core pack 200. During the welding process, the second supporting section 106 is located on one side of the first lug 201 of the other core pack 200, and the second bending section 107 is located on the other side of the first lug 201 of the other core pack 200. The second bending section 107 and the second supporting section 106 protect the first lug 201 of the other core pack 200, so as to avoid tearing of the first lug 201 of the other core pack 200 during the welding process, thereby improving the connection strength of the connecting sheet structure 100 and the core pack 200.

[0031] Referring to FIG. 2 and FIG. 3, in some embodiments, the second lug connecting part 103 comprises a second supporting section 106 and a second bending section 107, and the projection of the second bending section 107 on the second supporting section 106 partially overlaps the second supporting section 106. It should be noted that, during the welding process, the second bending section 107 only needs to cover the second lug 202. However, considering the space utilization rate and the welding effect, the connection strength and the like, in some embodiments, the second bending section 107 completely covers the first lug 201, that is, the second bending section 107 and the second supporting section 106 are in a relative horizontal state. Specifically, during actual operation, the second supporting section 106 and the second bending section 107 are in the same horizontal plane, the first lug 201 of the other core pack 200 is first placed on the second supporting section 106, and then the second bending section 107 is bent so that the second bending section 107 covers the first lug 201 of the other core pack 200. At this time, the second supporting section 106 and the second bending section 107 clamp the first lug 201 of the other core pack 200 therebetween. In this way, the first lug 201 of the other core pack 200 can be well protected, and tearing of the first lug 201 of the other core pack 200 during the welding process can be avoided. In addition, the clamping effect of the second supporting section 106 and the second bending section 107 can achieve pre-fixing, so as to avoid displacement of the first lug 201 of the other core pack 200 during the welding process, thereby avoiding tearing of the first lug 201 of the other core pack 200.

[0032] In some embodiments, referring to FIG. 2 and FIG. 3, the tab connecting portion is used to connect to the tabs on the cover plate, and the cover plate tabs are located on the same end surface as the first tabs 201, so that the first support section 104, the second support section 106 and the tab connecting portion are located in the same plane. When the tab connecting portion and the first support section 104 are located in the same horizontal plane, the tab connecting portion does not need to be bent, thereby improving the structural strength of the connecting sheet structure 100.

[0033] The specific positions of the first support section 104 and the second support section 106 are not limited. The tab connecting portion has oppositely arranged first and second edges, and oppositely arranged third and fourth edges, wherein the third and fourth edges are located between the first and second edges. For example, in some embodiments, the first tabs 201 of the two core packs 200 are located at the same position, and both of the first tabs 201 are arranged close to the third edge, and the first support section 104 and the second support section 106 are located on the same side of the tab connecting portion 101, considering the space utilization. Specifically, the first support section 104 and the second support section 106 are connected at the second edge and are spaced apart from each other, which can improve the space utilization and facilitate the welding operation of the operator. In another embodiment, the first tabs 201 of the two core packs 200 are arranged in a staggered manner, one of the first tabs 201 is arranged close to the third edge, and the other first tab 201 is arranged close to the fourth edge. Considering the convenience of welding, the first support section 104 is arranged at the third edge, and the second support section 106 is arranged at the fourth edge.

[0034] Referring to FIG. 2 and FIG. 3, the connection mode of the first bending section 105 and the second bending section 107 is not limited. The first support section 104 has oppositely arranged first and second side edges, and oppositely arranged third and fourth side edges, wherein the third and fourth side edges are located between the first and second side edges. The second support section 106 has oppositely arranged fifth and sixth side edges, and oppositely arranged seventh and eighth side edges, wherein the seventh and eighth side edges are located between the fifth and sixth side edges. Specifically, one of the first tabs 201 is arranged close to the fourth side edge, and the other first tab 201 is arranged close to the seventh side edge. In one embodiment, the first bending section 105 is connected to the third side edge, and the second bending section 107 is connected to the seventh side edge, which can improve the space utilization and save space. In another embodiment, the first bending section 105 is connected to the second side edge, and the second bending section 107 is connected to the fifth side edge, which can reduce the probability of mutual interference between the first bending section and the second bending section, and the bending process is more convenient and fast.

[0035] When the first bending section 105 is arranged on one side of the first support section 104 close to the second support section 106, and the second bending section 107 is arranged on one side of the second support section 106 close to the first support section 104, a distance difference is arranged between the first bending section 105 and the second bending section 107, so as to avoid mutual interference between the first bending section 105 and the second bending section 107, and facilitate the bending processing of the operator.

[0036] In some embodiments, referring to FIGS. 2 and 3, an included angle between the first support section 104 and the first bending section 105 is θ, where 0°<θ≤180°. When θ is less than 0°, the space between the first support section 104 and the first bending section 105 is too small to clamp and fix the first tab 201. When θ is greater than 180°, the first support section 104 and the first bending section 105 are in the same horizontal plane, and the first bending section 105 is located on the side of the first support section 104 away from the first tab 201, i.e., the first bending section 105 cannot protect the first tab 201, and the first tab 201 is prone to tearing during the welding process.

[0037] Similarly, referring to FIGS. 2 and 3, in another embodiment, an included angle between the second support section 106 and the second bending section 107 is α, where 0°<α≤180°. When α is less than 0°, the space between the second support section 106 and the second bending section 107 is too small to clamp and fix the first tab 201. When α is greater than 180°, the second support section 106 and the second bending section 107 are in the same horizontal plane, and the second bending section 107 is located on the side of the second support section 106 away from the first tab 201, i.e., the second bending section 107 cannot protect the first tab 201, and the first tab 201 is prone to tearing during the welding process.

[0038] In some embodiments, the width of the first support section 104 is L1, the width of the first bending section 105 is L2, and L2 / L1=(0.7~1):1. It should be noted that when the ratio of L2 to L1 is less than 0.7, the width of the first bending section 105 is too small to completely cover the first tab 201, and the first tab 201 is prone to tearing during the welding process. When the ratio of L2 to L1 is greater than 1, the length of the first bending section 105 is too long, and the occupied space is increased.

[0039] Similarly, the width of the second support section 106 is L3, the width of the second bending section 107 is L4, and L4 / L3=(0.7~1):1. When the ratio of L4 to L3 is less than 0.7, the width of the second bending section 107 is too small to completely cover the first tab 201, and the first tab 201 is prone to tearing during the welding process. When the ratio of L4 to L3 is greater than 1, the length of the second bending section 106 is too long, and the occupied space is increased.

[0040] In some embodiments, referring to FIG. 2 and FIG. 3, the pole connecting part 101 includes a body part 108 and a sub connecting part 109, the body part 108 is connected with the first tab connecting part 102 and the second tab connecting part 103, the sub connecting part 109 is connected to the side of the body part 108 away from the first tab connecting part 102, and the width of the sub connecting part 109 is less than the width of the body part 108. It should be noted that the width of the sub connecting part 109 is less than the width of the body part 108, which can save materials and reduce costs under the premise of ensuring the connection strength.

[0041] In some embodiments, the thickness of the pole connecting part 101 is H1, 0.3mm<H1≤1.5mm; the thickness of the pole connecting part 101 is not too thick, nor too thin; when the thickness of the pole connecting part 101 is thicker, the space occupied is increased, and when the thickness of the pole connecting part 101 is thinner, the connection strength is lower and is prone to breakage. Specifically, H1 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.65mm, 0.7mm, 0.72mm, 0.8mm, 0.88mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm or other data not listed.

[0042] In some embodiments, the thickness of the first tab connecting part 102 is H2, 0.3mm<H2≤1.5mm; the thickness of the second tab connecting part 103 is H3, 0.3mm<H3≤1.5mm. It should be noted that when the thickness of the first tab connecting part 102 and the second tab connecting part 103 is larger, the welding capacity cannot penetrate smoothly during the welding process, resulting in increased welding difficulty. When the thickness of the first tab connecting part 102 and the second tab connecting part 103 is smaller, the connection strength of the connection sheet structure 100 and the first tab 201 is reduced. Specifically, H2 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.65mm, 0.7mm, 0.72mm, 0.8mm, 0.88mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm or other data not listed. More specifically, H3 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.65mm, 0.7mm, 0.72mm, 0.8mm, 0.88mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm or other data not listed.

[0043] The application also provides a battery, FIG. 4 to FIG. 7 are structural schematic diagrams of an embodiment of the battery provided by the application; the battery includes the connection sheet structure 100.

[0044] Referring to FIG. 4, the battery further comprises two core packs 200 and a cover plate. The two core packs 200 are arranged side by side, each core pack 200 comprises a first tab 201 and a second tab 202, the first tab 201 and the second tab 202 are located on the same side, and the first tab 201 and the second tab 202 are arranged at intervals; the first tab connecting portion 102 and the second tab connecting portion 103 of one of the tab connecting structures 100 connect the first tabs 201 on the two core packs 200, and the first tab connecting portion 102 and the second tab connecting portion 103 of the other tab connecting structure 100 connect the second tabs 202 on the two core packs 200. The cover plate is provided with two pole columns, and the two pole columns are connected with the pole column connecting portions 101 on the two tab connecting structures 100 respectively.

[0045] In some embodiments, the first mounting hole is formed on the pole column connecting portion 101, and the tab is clamped in the first mounting hole.

[0046] In some embodiments, the first support section 104, the first tab 201 and the first curved section 105 are welded. It can be understood that after the first curved portion is bent to the first tab 201, the first tab 201 is welded to the first support section 104 by ultrasonic welding, the energy generated by the ultrasonic welding simultaneously welds the first curved portion to the first tab 201, which has little effect on the structural strength of the tab connecting structure 100, and can also improve the installation efficiency.

[0047] Similarly, the second tab connecting portion 103 comprises a second support section 106 and a second curved section 107, and the second support section 106, the second tab 202 and the second curved section 107 are welded. After the second curved portion is bent to the first tab 201 of the other core pack 200, the first tab 201 of the other core pack 200 is welded to the second support section 106 by ultrasonic welding, and the energy generated by the ultrasonic welding simultaneously welds the second curved portion to the first tab 201 of the other core pack 200, which has little effect on the structural strength of the tab connecting structure 100, and can also improve the installation efficiency.

[0048] In some embodiments, the first tab connecting portion 102 comprises a first support section 104 and a first curved section 105, and the sum of the widths of the first support section 104 and the first curved section 105 is equal to the width of the core pack 200; in this way, the space utilization can be improved, so that there is no gap between the two core packs 200, and the material and cost can also be saved.

[0049] Similarly, the second tab connecting portion 103 comprises a second support section 106 and a second curved section 107, and the sum of the widths of the second support section 106 and the second curved section 107 is equal to the width of the core pack 200. In this way, the space utilization can be improved, so that there is no gap between the two core packs 200, and the material and cost can also be saved.

[0050] Further, the application also provides a connecting method of the connecting sheet structure 100, and the specific operation is as follows:

[0051] Please refer to FIG. 5, FIG. 6 and FIG. 7, the two core packs 200 are arranged at intervals, so that the side surfaces provided with the first lugs 201 of the two core packs 200 are arranged oppositely, the connecting sheet structure 100 is placed between the two core packs 200, the first lug 201 of one of the core packs 200 is on the first supporting section 104, the first lug 201 of the other core pack 200 is on the second supporting section 106, the first bending section 105 and the second bending section 107 are bent, so that the first bending section 105 and the second bending section 107 cover the two second lugs 202, the first supporting section 104, the first lug 201 and the first bending section 105 are welded and connected by ultrasonic welding, and at the same time, the second supporting section 106, the second lug 202 and the second bending section 107 are welded and connected, then the two first lugs 201 are bent, so that the two core packs 200 are arranged side by side, and the connection of the connecting sheet structure 100 is completed. Such an arrangement can improve the space utilization rate, and can also ensure the connection strength of the connecting sheet structure 100.

Claims

1. A tab structure (100) comprising: a pole connecting portion (101) configured to be connected with a pole; a first tab (201) connecting portion (102) connected with the pole connecting portion (101), the first tab (201) connecting portion (102) being configured to connect a first tab (201) of one core pack (200); and a second tab (202) connecting portion (103) connected with the pole connecting portion (101), the second tab (202) connecting portion (103) being configured to connect a first tab (201) of another core pack (200).

2. The tab structure (100) according to claim 1, wherein The first tab (201) connecting portion (102) comprises a first support section (104) connected with the pole connecting portion (101) and a first curved section (105) disposed at a preset angle with the plane in which the first support section (104) lies.

3. The tab structure (100) according to claim 1 or 2, wherein The second tab (202) connecting portion (103) comprises a second support section (106) connected with the pole connecting portion (101) and a second curved section (107) disposed at a preset angle with the plane in which the second support section (106) lies.

4. The tab structure (100) according to claim 1, wherein The first tab (201) connecting portion (102) comprises a first support section (104) and a first curved section (105), a projection of the first curved section (105) on the first support section (104) partially overlaps the first support section (104).

5. The tab structure (100) according to claim 1 or 4, wherein The second tab (202) connecting portion (103) comprises a second support section (106) and a second curved section (107), a projection of the second curved section (107) on the second support section (106) partially overlaps the second support section (106).

6. The tab structure (100) according to any one of claims 1 to 5, wherein The first tab (201) connecting portion (102) comprises a first support section (104), and the second tab (202) connecting portion (103) comprises a second support section (106), the first support section (104) and the second support section (106) lie in the same plane as the tab connecting portion.

7. The tab structure (100) according to claim 6, wherein The first support section (104) and the second support section (106) lie on the same side of the pole connecting portion (101).

8. The tab structure (100) according to claim 6, wherein The first tab (201) connecting portion (102) comprises a first curved section (105), and the second tab (202) connecting portion (103) comprises a second curved section (107); The first support section (104) is provided with the first curved section (105) on the side close to the second support section (106), and the second support section (106) is provided with the curved section on the side close to the first support section (104), and a distance difference is provided between the first curved section (105) and the second curved section (107).

9. The tab structure (100) according to claim 8, characterized in that An included angle between the first support section (104) and the first curved section (105) is θ, wherein 0° < θ ≤ 180°.

10. The tab structure (100) according to any one of claims 1 to 9, wherein The first lug (201) connecting part (102) comprises a first support section (104) and a first curved section (105), the width of the first support section (104) is L1, the width of the first curved section (105) is L2, L2 / L1=(0.7~1):

1.

11. The tab structure (100) according to any one of claims 1 to 10, wherein The second lug (202) connecting part (103) comprises a second support section (106) and a second curved section (107), the width of the second support section (106) is L3, the width of the second curved section (107) is L4, L4 / L3=(0.7~1):

1.

12. The tab structure (100) according to any one of claims 1 to 11, wherein The pole connecting part (101) comprises a body part (108) and a sub connecting part (109), the body part (108) is connected with the first lug (201) connecting part (102) and the second lug (202) connecting part (103), the sub connecting part (109) is connected on the side of the body part (108) away from the first lug (201) connecting part (102), and the width of the sub connecting part (109) is less than the width of the body part (108).

13. The tab structure (100) according to any one of claims 1 to 12, wherein The thickness of the pole connecting part (101) is H1, 0.3mm<H1≤1.5mm.

14. The tab structure (100) according to any one of claims 1 to 13, wherein The thickness of the first lug (201) connecting part (102) is H2, 0.3mm<H2≤1.5mm.

15. The tab structure (100) according to any one of claims 1 to 14, wherein The thickness of the second lug (202) connecting part (103) is H3, 0.3mm<H3≤1.5mm.

16. A battery comprising: Two core packs (200) arranged side by side, each of the core packs (200) comprising a first lug (201) and a second lug (202), the first lug (201) and the second lug (202) being located on the same side; A cover plate provided with a pole Two connecting piece structures (100) according to any one of claims 1 to 15 connected to the two core packs (200) and the cover plate.

17. The battery of claim 16, wherein, The first lug (201) connecting part (102) comprises a first support section (104) and a first curved section (105), the first support section (104), the first lug (201) and the first curved section (105) are weldedly connected.

18. The battery of claim 16 or 17, wherein, The second lug (202) connecting part (103) comprises a second support section (106) and a second curved section (107), the second support section (106), the second lug (202) and the second curved section (107) are weldedly connected.

19. The battery of claim 17, wherein, The first lug (201) connecting part (102) comprises a first support section (104) and a first curved section (105), the sum of the widths of the first support section (104) and the first curved section (105) is equal to the width of the core pack (200).

20. The battery of claim 17, wherein, The second lug (202) connecting part (103) comprises a second support section (106) and a second curved section (107), the sum of the widths of the second support section (106) and the second curved section (107) is equal to the width of the core pack (200).

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