Batteries, battery packs, and vehicles

Abstract

A battery (100), a battery pack (1000), and a vehicle (10000). The battery (100) comprises a battery housing (110), an electrode core (120), withdrawal plates (141, 142), and conductive posts (131, 132). The electrode core (120) and withdrawal plates (141, 142) are all disposed within the battery housing (110), the withdrawal plates (141, 142) are connected to the electrode core (120), the conductive posts (131, 132) pass through the battery housing (110) such that the conductive posts (131, 132) are connected to the withdrawal plates (141, 142), and the cross-sectional area s lead The relationship between the capacity C of the battery (100) and the current is C / s lead ≦15, s lead The unit is mm 2 and the unit of C is Ah.

Description

[Technical Field]

[0001] Cross-reference of related applications This disclosure claims priority and benefits of China Patent Application No. 202210515990.7, entitled “BATTERY, BATTERY PACK, AND VEHICLE,” filed on 12 May 2022, and China Patent Application No. 202222993656.0, entitled “BATTERY, BATTERY PACK, AND VEHICLE,” filed on 10 November 2022. The entire contents of the said applications are incorporated herein by reference.

[0002] This disclosure relates to the field of battery technology, and more particularly to batteries, battery packs, and vehicles. [Background technology]

[0003] In batteries of related technology, a lead-out plate is placed inside the battery housing and connected between the electrode core tabs and conductive posts to allow current to flow both inside and outside the battery. However, in related technology, the lead-out plate has only one size. Either the cross-sectional area of ​​the lead-out plate is too large, resulting in wasted resources, or the cross-sectional area of ​​the lead-out plate is too small, leading to overheating problems and further thermal safety issues for the battery. [Overview of the project] [Problems that the invention aims to solve]

[0004] This disclosure aims to solve at least one of the technical problems present in the related technology. Therefore, the purpose of this disclosure is to provide a battery with strong current carrying capability, to ensure that the temperature does not rise excessively during use due to the small current-carrying area and does not exceed the battery's operating temperature range, and to avoid thermal safety problems of the battery.

[0005] The present disclosure further provides a battery pack having the battery described above.

[0006] The present disclosure further provides a vehicle having the battery pack described above.

Means for Solving the Problems

[0007] The battery according to the present disclosure includes a battery housing, an electrode core, a lead-out plate, and a conductive post. The electrode core and the lead-out plate are all disposed within the battery housing. The lead-out plate is connected to the electrode core, and the conductive post penetrates through the battery housing. As a result, the conductive post is connected to the lead-out plate. The relationship between the cross-sectional area s lead of the lead-out plate and the capacity C of the battery is C / s lead ≦ 15. The unit of s lead is mm 2 and the unit of C is Ah.

[0008] According to the battery of the present disclosure, the relationship between the cross-sectional area s lead of the lead-out plate and the capacity C of the battery is configured as C / s lead ≦ 8. This ensures the current-carrying capacity of the lead-out plate and also ensures that the temperature of the lead-out plate does not rise excessively due to the small current-carrying area during the use of the battery. As a result, the internal temperature distribution of the battery is not affected, the internal temperature of the battery does not exceed the operating temperature range of the battery, and it is ensured that there are no problems with the thermal safety of the battery.

[0009] Optionally, the relationship between the cross-sectional area s lead of the lead-out plate and the capacity C of the battery is 2 ≦ C / s lead ≦ 15.

[0010] Optionally, the relationship between the cross-sectional area s lead of the lead-out plate and the capacity C of the battery is 2 ≦ C / s lead ≦ 15.

[0011] Optionally, the lead plate includes a positive lead plate and a negative lead plate. The conductive post includes a positive conductive post and a negative conductive post. The positive lead plate is connected to the positive conductive post through the battery housing, and the negative lead plate is connected to the negative conductive post through the battery housing. Cross-sectional area s of the positive lead plate. positive lead The relationship between the battery capacity C and the current is 5 ≤ ​​C / s positive lead ≤ 12, and the cross-sectional area s of the negative electrode lead plate. negative lead The relationship between the battery capacity C and the current is 6 ≤ C / s negative lead ≤ 15. The cross-sections of the positive electrode lead plate and the negative electrode lead plate are planes perpendicular to the direction of current flow, s positive lead and s negative lead The unit is mm 2 Therefore, the unit of C is Ah.

[0012] As an optional choice, the cross-sectional area of ​​the positive electrode lead plate is 14 mm². 2 From 150mm 2 The range is up to 10 mm², and the cross-sectional area of ​​the negative electrode lead plate is 10 mm². 2 From 130mm 2 The range is from 30Ah to 400Ah.

[0013] Optionally, the positive electrode lead plate is an aluminum sheet, and the negative electrode lead plate is a copper sheet.

[0014] Optionally, the positive electrode lead plate and the negative electrode lead plate include a connected first and second connect sheet, respectively. The second connect sheet of the positive electrode lead plate is connected to the positive electrode tab of the electrode core, the first connect sheet of the positive electrode lead plate is connected to the positive electrode conductive post, the second connect sheet of the negative electrode lead plate is connected to the negative electrode tab of the electrode core, and the first connect sheet of the negative electrode lead plate is connected to the negative electrode conductive post.

[0015] Optionally, the size of the first connecting sheet in the longitudinal direction of the battery is in the range of 0.8 mm to 2 mm.

[0016] Optionally, the size of the first connecting sheet in the longitudinal direction of the battery is in the range of 0.6 mm to 2 mm.

[0017] Optionally, the battery housing includes a first plate and a second plate facing each other in the longitudinal direction of the battery. The first connecting sheet of the positive electrode lead plate and the first connecting sheet of the negative electrode lead plate are parallel to the first plate and the second plate, respectively.

[0018] Optionally, the battery housing further includes a third and fourth plate facing each other in the width direction of the battery, and a fifth and sixth plate facing each other in the thickness direction of the battery. The second connecting sheet of the positive electrode lead plate and the second connecting sheet of the negative electrode lead plate are parallel to the fifth and sixth plate, respectively.

[0019] Optionally, the first, second, third, fourth, and fifth plates are configured as lower housings with one end open, and the sixth plate is fixedly connected to the lower housings so as to close the open end of the lower housings.

[0020] Optionally, the battery further includes a first insulating spacer located within the battery housing. At least a portion of the first insulating spacer is located between the positive electrode lead plate and the first plate piece, and the positive electrode conductive post is connected to the positive electrode lead plate through the first insulating spacer.

[0021] Optionally, the battery further includes a second insulating spacer located within the battery housing. At least a portion of the second insulating spacer is positioned between the negative electrode lead plate and the second plate piece, and the negative electrode conductive post is connected to the negative electrode lead plate through the second insulating spacer.

[0022] As an optional choice, the relationship between the cross-sectional area s1 of the positive electrode conductive post and the battery capacity C is 6 / 5 ≤ C / s1 ≤ 16 / 3, and the relationship between the cross-sectional area s2 of the negative electrode conductive post and the battery capacity C is 6 / 5 ≤ C / s2 ≤ 8, with both s1 and s2 being in units of mm. 2 That is the case.

[0023] Optionally, the cross-sectional area s1 of the positive electrode conductive post and the cross-sectional area s2 of the negative electrode conductive post are set to 12 mm². 2 From 315mm 2 The range is from 30Ah to 400Ah.

[0024] Optionally, the positive electrode conductive post is an aluminum post, and the negative electrode conductive post is a copper post.

[0025] The battery pack provided in this disclosure includes the battery described above.

[0026] The vehicle described herein includes the battery or battery pack described above.

[0027] Additional aspects and benefits of this disclosure are provided in the following description, some of which may be apparent from the following description or learned from the practice of this disclosure.

[0028] The above and / or additional aspects and advantages of this disclosure will become apparent and understandable from the following description of embodiments with reference to the accompanying drawings. [Brief explanation of the drawing]

[0029] [Figure 1] This is a diagram of the lower housing of a battery according to one embodiment of the present disclosure. [Figure 2] This is a diagram of a battery according to one embodiment of the present disclosure. [Figure 3] This is an enlarged view of the area C enclosed by a circle in Figure 2. [Figure 4] This is a diagram of a battery according to one embodiment of the present disclosure. [Figure 5] This is an enlarged view of the area D enclosed by a circle in Figure 4. [Figure 6] This figure shows a case in which the cross-section of the first positive (negative) conductive post or the second positive (negative) conductive post according to one embodiment of the present disclosure is cylindrical. [Figure 7] This figure shows a case in which the cross-section of the first positive (negative) conductive post or the second positive (negative) conductive post according to one embodiment of the present disclosure is racetrack shaped. [Figure 8] This is a cross-sectional view of a battery according to one embodiment of the present disclosure. [Figure 9] This is an enlarged view of the area E enclosed by a circle in Figure 8. [Figure 10] This is an enlarged view of the area H enclosed by a circle in Figure 8. [Figure 11] This is a diagram of a first insulating spacer according to one embodiment of the present disclosure. [Figure 12] This diagram shows the coordination between a second insulating spacer and a negative electrode lead plate according to one embodiment of the present disclosure. [Figure 13] This is a diagram of a positive electrode extraction plate according to one embodiment of the present disclosure. [Figure 14] This is a diagram of a negative electrode extraction plate according to one embodiment of the present disclosure. [Figure 15] This is an exploded view of a battery according to one embodiment of the present disclosure. [Figure 16] This is a diagram of a battery in one direction according to one embodiment of the present disclosure. [Figure 17] This is a diagram of a battery in another direction according to one embodiment of the present disclosure. [Figure 18] This is a diagram of a battery in yet another direction according to one embodiment of the present disclosure. [Figure 19] This diagram shows the interaction between the positive electrode conductive post, the sealing ring, and the battery housing of a battery according to another embodiment of the present disclosure. [Figure 20] This diagram shows the interaction between the negative electrode conductive post of a battery, a sealing ring, and a battery housing according to yet another embodiment of the present disclosure. [Figure 21]These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and Embodiment 1. [Figure 22] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and Embodiment 2. [Figure 23] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and Embodiment 3. [Figure 24] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and Embodiment 4. [Figure 25] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and Embodiment 5. [Figure 26] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and embodiment 6. [Figure 27] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and embodiment 7. [Figure 28] These are temperature rise curves for the positive electrode conductive post and the negative electrode conductive post in the comparative example and embodiment 8. [Figure 29] These are temperature rise curve diagrams for the positive electrode lead plate and the negative electrode lead plate in the comparative example and Embodiment 1. [Figure 30] These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and Embodiment 2. [Figure 31] These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and embodiment 3. [Figure 32] These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and embodiment 4. [Figure 33] These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and embodiment 5. [Figure 34] These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and embodiment 6. [Figure 35]These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and embodiment 7. [Figure 36] These are temperature rise curves for the positive electrode lead plate and the negative electrode lead plate in the comparative example and embodiment 8. [Figure 37] This is a diagram of a battery pack according to one embodiment of the present disclosure. [Figure 38] This is a diagram of a vehicle according to one embodiment of the present disclosure. [Figure 39] This is a diagram of a vehicle according to another embodiment of the present disclosure. [Modes for carrying out the invention]

[0030] Embodiments of the present disclosure are described in detail below, examples of embodiments are shown in the accompanying drawings, and identical or similar elements or elements having the same or similar function are indicated by the same or similar reference numerals throughout the description. The embodiments described below with reference to the accompanying drawings are illustrative and used solely to illustrate the present disclosure and should not be construed as limiting the present disclosure.

[0031] A battery 100 according to an embodiment of the present disclosure will be described below with reference to Figures 1 to 36.

[0032] The battery according to the embodiment of the present disclosure includes a battery housing 110, an electrode core 120, and a conductive post.

[0033] The electrode core 120 is located within the battery housing 110, and the conductive posts penetrate the battery housing 110. As a result, the inner ends of the conductive posts are connected to the electrode core 120, and the outer ends of the conductive posts extend from the battery housing 110. Specifically, the inner ends of the conductive posts are connected to the tabs of the electrode core 120. In addition, the cross-sectional area of ​​the conductive posts is s, the capacity of the battery is C, and the relationship between s and C is C / s ≤ 8, where the unit of s is mm. 2 The unit of C is Ah.

[0034] The size of the cross-sectional area of ​​a conductive post may be understood as representing its current-carrying capacity. A larger cross-sectional area of ​​a conductive post indicates stronger current-carrying capacity. In addition, the minimum cross-sectional area on the conductive post determines its current-carrying capacity. The cross-section of a conductive post is the plane perpendicular to the direction of current flow. If the conductive post is cylindrical and the direction of current flow is axial, the cross-section of the conductive post is radial and circular in shape. If the conductive post is designed using a variable cross-section, the cross-sectional area of ​​the conductive post may be understood as the area of ​​the minimum cross-section on the conductive post.

[0035] After extensive experimentation and discussion, the inventors of this disclosure found that the following relationship, C / s ≤ 8, is satisfied. This ensures the current-carrying capability of the conductive posts of battery 100 and also ensures that the temperature does not rise excessively due to the small current-carrying area during use of battery 100, thus avoiding thermal safety issues of battery 100.

[0036] In some embodiments of this disclosure, the relationship between the cross-sectional area s of the conductive post and the capacity C of the battery is 6 / 5 ≤ C / s ≤ 8. The inventors have found that a smaller ratio of the battery capacity C to the cross-sectional area s of the conductive post is not always better. If the ratio is too small, the size of the conductive post may become excessively large, resulting in a potentially redundant design.

[0037] In some embodiments of this disclosure, the conductive post includes a positive electrode conductive post 131 and a negative electrode conductive post 132. The relationship between the cross-sectional area s1 of the positive electrode conductive post 131 and the battery capacity C is 6 / 5 ≤ C / s1 ≤ 16 / 3, and the relationship between the cross-sectional area s2 of the negative electrode conductive post 132 and the battery capacity C is 6 / 5 ≤ C / s2 ≤ 8, where the units of s1 and s2 are both mm. 2If the positive electrode conductive post 131 includes multiple positive electrode posts that penetrate the battery housing 110 and connect to the positive electrode tab of the electrode core 120, the cross-sectional area s1 of the positive electrode conductive post 131 may be understood as the sum of the cross-sectional areas of the multiple positive electrode posts. If the positive electrode post is designed using a variable cross-section, the cross-sectional area of ​​the positive electrode post may be understood as the area of ​​the smallest cross-section on the positive electrode post. If the negative electrode conductive post 132 includes multiple negative electrode posts that penetrate the battery housing 110 and connect to the negative electrode tab of the electrode core 120, the cross-sectional area s2 of the negative electrode conductive post 132 is the sum of the cross-sectional areas of the multiple negative electrode posts. If the negative electrode post is designed using a variable cross-section, the cross-sectional area of ​​the negative electrode post may be understood as the area of ​​the smallest cross-section on the negative electrode post.

[0038] Furthermore, the relationship between the cross-sectional area s1 of the positive electrode conductive post 131 and the battery capacity C is 8 / 3 ≤ C / s1 ≤ 16 / 3, and the relationship between the cross-sectional area s2 of the negative electrode conductive post 132 and the battery capacity C is 3 ≤ C / s2 ≤ 8.

[0039] The positive electrode conductive post 131 of battery 100 may be made of aluminum, and the negative electrode conductive post 132 may be made of copper. It should be noted that aluminum and copper have different conductivity. For the same cross-sectional area, copper has a stronger current-conducting ability than aluminum. Therefore, in order to ensure that the current-conducting ability of the positive electrode conductive post 131 and the negative electrode conductive post 132 are the same, the cross-sectional area of ​​the negative electrode conductive post 132 made of copper may be small.

[0040] In some embodiments of this disclosure, the cross-sectional area s1 of the positive electrode conductive post and the cross-sectional area s2 of the negative electrode conductive post are 12 mm². 2 From 315mm 2 The range is from 30Ah to 400Ah.

[0041] The following describes the comparative examples (i.e., related technologies) and embodiments 1 to 8 (i.e., embodiments of the present disclosure) in Table 1. Under the same operating conditions, the batteries of the comparative examples and embodiments 1 to 8 are rapidly charged at a rate of 2C, and the temperature rise curves of the positive electrode conductive post 131 and the negative electrode conductive post 132 are recorded. The cross-sectional area s1 of the positive electrode conductive post 131, the cross-sectional area s2 of the negative electrode conductive post 132, and the total battery capacity C in the comparative examples and embodiments 1 to 8 are selected from the data in Table 1 below. Figure 21 is a temperature rise curve diagram of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 1. Figure 22 is a temperature rise curve diagram of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 2. Figure 23 is a temperature rise curve diagram of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 3. Figure 24 is a temperature rise curve diagram of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 4. Figure 25 shows the temperature rise curves of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 5. Figure 26 shows the temperature rise curves of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 6. Figure 27 shows the temperature rise curves of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 7. Figure 28 shows the temperature rise curves of the positive electrode conductive post 131 and the negative electrode conductive post 132 in the comparative example and embodiment 8.

[0042] [Table 1]

[0043] Compared to the comparative example, embodiments 1 to 8 show lower temperature rises for the positive electrode conductive post 131 and the negative electrode conductive post 132, ensuring that the battery is in good working order.

[0044] Furthermore, as shown in Figures 3 and 5, the positive electrode conductive post 131 includes a first positive electrode conductive post 131a, a second positive electrode conductive post 131b, and a first connecting member 131c. Both the first positive electrode conductive post 131a and the second positive electrode conductive post 131b penetrate the battery housing 110 and are connected to the positive electrode tab of the electrode core 120. The first connecting member 131c is located outside the battery housing 110 and is electrically connected to the first positive electrode conductive post 131a and the second positive electrode conductive post 131b. The cross-sectional area s1 of the positive electrode conductive post 131 is the sum of the cross-sectional area of ​​the first positive electrode conductive post 131a and the cross-sectional area of ​​the second positive electrode conductive post 131b.

[0045] The negative electrode conductive post 132 includes a first negative electrode conductive post 132a, a second negative electrode conductive post 132b, and a second connecting member 132c. Both the first negative electrode conductive post 132a and the second negative electrode conductive post 132b penetrate the battery housing 110 and are connected to the negative electrode tab of the electrode core 120. The second connecting member 132c is located outside the battery housing 110 and is electrically connected to the first negative electrode conductive post 132a and the second negative electrode conductive post 132b. The cross-sectional area s2 of the negative electrode conductive post 132 is the sum of the cross-sectional area of ​​the first negative electrode conductive post 132a and the cross-sectional area of ​​the second negative electrode conductive post 132b.

[0046] The first connecting member 131c is connected between the outer end of the first positive electrode conductive post 131a and the outer end of the second positive electrode conductive post 131b, thereby increasing the contact area between the first positive electrode conductive post 131a and the second positive electrode conductive post 131b, and allowing the positive electrode conductive post 131 to be connected to the outside more easily. The second connecting member 132c is connected between the outer end of the first negative electrode conductive post 132a and the outer end of the second negative electrode conductive post 132b, thereby increasing the contact area between the first negative electrode conductive post 132a and the second negative electrode conductive post 132b, and allowing the negative electrode conductive post 132 to be connected to the outside more easily.

[0047] In some embodiments of this disclosure, the cross-sections of the first positive electrode conductive post 131a and the second positive electrode conductive post 131b are circular or oval, and the cross-sections of the first negative electrode conductive post 132a and the second negative electrode conductive post 132b are circular or oval. When the size of the battery housing 110 in the thickness direction is large, the first positive electrode conductive post 131a, the second positive electrode conductive post 131b, the first negative electrode conductive post 132a, and the second negative electrode conductive post 132b having a circular cross-section may be used. However, when the size of the battery housing 110 in the thickness direction is small, the first positive electrode conductive post 131a, the second positive electrode conductive post 131b, the first negative electrode conductive post 132a, and the second negative electrode conductive post 132b having an oval cross-section may be used. This ensures that, assuming the positive electrode conductive post 131 and the negative electrode conductive post 132 have sufficient current-carrying capacity, the first positive electrode conductive post 131a, the second positive electrode conductive post 131b, the first negative electrode conductive post 132a, and the second negative electrode conductive post 132b do not exceed the size of the battery housing 110 in the thickness direction.

[0048] In some embodiments of this disclosure, as shown in Figures 1 to 4 and Figures 15 to 20, the battery housing 110 includes a first plate piece 111 and a second plate piece 112 facing each other in the longitudinal direction of the battery 100, a third plate piece 113 and a fourth plate piece 114 facing each other in the width direction of the battery 100, and a fifth plate piece 115 and a sixth plate piece 116 facing each other in the thickness direction of the battery 100. The size of the battery 100 in the longitudinal direction is greater than the size of the battery 100 in the width direction, and the size of the battery 100 in the width direction is greater than the size of the battery 100 in the thickness direction.

[0049] The first plate piece 111 and the second plate piece 112 are connected to one end and the other end of the third plate piece 113 and the fourth plate piece 114 on the same side, respectively, in the longitudinal direction of the battery 100. In other words, the first plate piece 111 is connected to one end of the third plate piece 113 and the fourth plate piece 114 on the same side, in the longitudinal direction of the battery 100, and the second plate piece 112 is connected to the other end of the third plate piece 113 and the fourth plate piece 114 on the same side, in the longitudinal direction of the battery 100. The fifth plate piece 115 and the sixth plate piece 116 are connected to one end and the other end of the third plate piece 113 and the fourth plate piece 114 on the same side, respectively, in the thickness direction of the battery 100. In other words, the fifth plate 115 is connected to one end on the same side of the third plate 113 and the fourth plate 114 in the thickness direction of the battery 100, and the sixth plate 116 is connected to the other end on the same side of the third plate 113 and the fourth plate 114 in the thickness direction of the battery 100.

[0050] The positive electrode conductive post 131 is positioned on the first plate piece 111, the negative electrode conductive post 132 is positioned on the second plate piece 112, the first insulating plate 131d is positioned between the first plate piece 111 and the first connecting member 131c, and the second insulating plate 132d is positioned between the second plate piece 112 and the second connecting member 132c. This effectively avoids electrical connections between the first connecting member 131c and the battery housing 110, and between the second connecting member 132c and the battery housing 110.

[0051] Furthermore, the first plate piece 111 is provided with a first via through which the first positive electrode conductive post 131a passes, and a second via through which the second positive electrode conductive post 131b passes, and the second plate piece 112 is provided with a third via through which the first negative electrode conductive post 132a passes, and a fourth via through which the second negative electrode conductive post 132b passes.

[0052] A positive electrode lead plate 141 and a negative electrode lead plate 142 are further arranged inside the battery housing 110. The positive electrode lead plate 141 may be connected to the positive electrode tab of the electrode core 120, and in addition, the positive electrode lead plate 141 may be further connected to the positive electrode conductive post 131. The negative electrode lead plate 142 may be connected to the negative electrode tab of the electrode core 120, and in addition, the negative electrode lead plate 142 may be further connected to the negative electrode conductive post 132.

[0053] As shown in Figures 9 and 10, a first sealing ring 151 is fitted onto the positive electrode conductive post 131, and the first sealing ring 151 is sandwiched between the positive electrode lead plate 141 and the first plate piece 111. A second sealing ring 152 is fitted onto the negative electrode conductive post 132, and the second sealing ring 152 is sandwiched between the negative electrode lead plate 142 and the second plate piece 112. In this way, the positive electrode conductive post 131 is restricted by the first sealing ring 151 so as not to contact the inner wall of the via on the first plate piece 111 through which the positive electrode conductive post 131 passes, and the negative electrode conductive post 132 is restricted by the second sealing ring 152 so as not to contact the inner wall of the via on the second plate piece 112 through which the negative electrode conductive post 132 passes.

[0054] A first insulating spacer 161 is further positioned between the positive electrode lead plate 141 and the first plate piece 111. The positive electrode conductive post 131 is connected to the positive electrode lead plate 141 by passing through the first insulating spacer 161. The first insulating spacer 161 is an insulating member. The first insulating spacer 161 can improve the safety performance of the battery 100 by avoiding contact between the positive electrode lead plate 141 and the battery housing 110.

[0055] A second insulating spacer 162 is further positioned between the negative electrode lead plate 142 and the second plate piece 112. The negative electrode conductive post 132 is connected to the negative electrode lead plate 142 by passing through the second insulating spacer 162. The second insulating spacer 162 is an insulating member. The second insulating spacer 162 can improve the safety performance of the battery 100 by avoiding contact between the negative electrode lead plate 142 and the battery housing 110.

[0056] Furthermore, a first step piece may be provided on the outer surface of the first insulating spacer 161, aligned with the inner end of the first sealing ring 151, thereby restricting the movement of the first sealing ring 151 and the positive electrode conductive post 131 and preventing direct contact between the positive electrode conductive post 131 and the battery housing 110. A second step piece may be provided on the outer surface of the second insulating spacer 162, aligned with the inner end of the second sealing ring 152, thereby restricting the movement of the second sealing ring 152 and the negative electrode conductive post 132 and preventing direct contact between the negative electrode conductive post 132 and the battery housing 110.

[0057] It can be understood that a portion of the inner end of the positive electrode conductive post 131 is aligned with a stepped piece on the first insulating spacer 161, another portion of the positive electrode conductive post 131 is in contact with the positive electrode lead plate 141, a portion of the inner end of the negative electrode conductive post 132 is aligned with a stepped piece on the second insulating spacer 162, and another portion of the negative electrode conductive post 132 is in contact with the negative electrode lead plate 142.

[0058] In some embodiments of this disclosure, the sizes of the first insulating vertical plate 161b and the second insulating vertical plate 162b are in the range of 0.3 mm to 1.5 mm, respectively, in the longitudinal direction of the battery housing. To ensure that the positive electrode lead plate 141 and the negative electrode lead plate 142 are insulated from the battery housing 110 and to minimize the space occupied in the longitudinal direction of the battery housing 110, if the thickness is less than 0.3 mm, the welding heat when the tab and lead plate are welded together may melt the spacer, resulting in insufficient insulation. If the thickness exceeds 1.5 mm, the space of the electrode core 120 is excessively occupied, resulting in reduced space utilization and affecting the design capacity of the battery 100. Therefore, after several experiments and adjustments by the inventors of this disclosure, the sizes of both the first insulating vertical plate 161b and the second insulating vertical plate 162b are selected as 0.3 mm to 1.5 mm in the longitudinal direction of the battery housing 110.

[0059] As shown in Figures 11 and 12, the first insulating spacer 161 includes a first support piece 161a and a first insulating piece connected to the first support piece 161a. The inner and outer ends of the first support piece 161a abut against the electrode core 120 and the first plate piece 111 of the battery 100, respectively, and the first insulating piece is aligned with the positive electrode lead plate 141 and positioned between the positive electrode lead plate 141 and the battery housing 110. The second insulating spacer 162 includes a second support piece 162a and a second insulating piece connected to the second support piece 162a. The inner and outer ends of the second support piece 162a abut against the end of the electrode core 120 and the second plate piece 112, respectively, and the second insulating piece is aligned with the negative electrode lead plate 142 and positioned between the negative electrode lead plate 142 and the battery housing 110.

[0060] The first insulating piece includes a first insulating vertical plate 161b and a first insulating horizontal plate 161c. The first insulating vertical plate 161b is positioned between the first positive electrode connection sheet 141a and the first plate piece 111, and the first insulating horizontal plate 161c is positioned in the thickness direction between the second positive electrode connection sheet 141b and the side plate of the battery housing 110. The second insulating piece includes a second insulating vertical plate 162b and a second insulating horizontal plate 162c. The second insulating vertical plate 162b is positioned between the first negative electrode connection sheet 142a and the second plate piece 112, and the second insulating horizontal plate 162c is positioned in the thickness direction between the second negative electrode connection sheet 142b and the side plate of the battery housing 110.

[0061] In some embodiments of this disclosure, the first plate 111, the second plate 112, the third plate 113, the fourth plate 114, and the fifth plate 115 constitute a lower housing with one side open, and the sixth plate 116 is fixedly connected to the lower housing so as to close the open end of the lower housing. Thus, the electrode core 120 enters the inside of the battery housing 110 through a very wide open end rather than a narrow channel, significantly reducing installation costs and saving installation time.

[0062] Specifically, the first insulating horizontal plate 161c is positioned between the second positive electrode connection sheet 141b and the fifth plate piece 115, and the second insulating horizontal plate 162c is positioned between the second negative electrode connection sheet 142b and the fifth plate piece 115.

[0063] The size of the first support piece 161a in the longitudinal direction of the battery housing 110 is larger than the size of the first insulating vertical plate 161b in the longitudinal direction of the battery housing 110, and the size of the second support piece 162a in the longitudinal direction of the battery housing 110 is larger than the size of the second insulating vertical plate 162b in the longitudinal direction of the battery housing 110. Therefore, the first support piece 161a and the second support piece 162a may tightly clamp the electrode core 120 within the battery housing 110 to prevent the electrode core 120 from moving within the battery housing 110.

[0064] In some embodiments of this disclosure, the outer surface of the positive electrode conductive post 131 extends from the battery housing and is at a distance of 2 mm to 5 mm from the outer surface of the first plate piece 111, and the outer surface of the negative electrode conductive post 132 extends from the battery housing and is at a distance of 2 mm to 5 mm from the outer surface of the second plate piece 112. Thus, it is ensured that the positive electrode conductive post 131 and the negative electrode conductive post 132 can have projections sufficient for connection to external electrical components. In addition, if the entire length of the battery 100 is fixed, it is ensured that the longitudinal space of the battery 100 is not excessively occupied and that the battery 100 has sufficient capacity.

[0065] According to the battery 100 in this embodiment of the present disclosure, both the electrode core 120 and the lead plate are located within the battery housing 110, and the lead plate and the electrode core 120 are connected. Specifically, the lead plate is connected to the tabs of the electrode core 120, conductive posts penetrate the battery housing 110, the inner ends of the conductive posts are connected to the lead plate, and the outer ends of the conductive posts protrude from the battery housing 110, so that the conductive posts can charge and discharge the electrode core 120.

[0066] Cross-sectional area s of the drawer plate lead The relationship between the battery capacity C and C / s is C / s lead The value is ≤ 15. It should be noted that the cross-sectional area of ​​the lead plate determines the lead plate's current-carrying capacity. Therefore, in this relationship, the ratio of the battery capacity to the lead plate's cross-sectional area indicates the lead plate's current-carrying capacity. It should be noted that the cross-section of the lead plate is a plane perpendicular to the direction of current flow or perpendicular to the thickness direction of the lead plate. If the lead plate is designed using a variable cross-section, the lead plate's cross-sectional area is the area of ​​the smallest cross-section on the lead plate.

[0067] Through extensive experimentation, the inventors of this disclosure have found that this relationship can guarantee the energizing capability of the drawer plate, and that the temperature of the drawer plate does not rise excessively due to the small energizing area during use of the battery 100. As a result, the internal temperature distribution of the battery 100 is not affected, the internal temperature of the battery 100 does not exceed the operating temperature range of the battery 100, and thus no thermal safety issues arise for the battery 100.

[0068] Furthermore, the cross-sectional area s of the drawer plate lead The relationship between the battery capacity C and the current is 2 ≤ C / s lead The value is ≤15. Therefore, it can be further guaranteed that the lead plate has sufficient current-carrying capacity. The inventors found that a smaller ratio of the battery capacity C to the cross-sectional area s of the lead plate is not always better. If the ratio is too small, the size of the lead plate becomes excessively large, resulting in a redundant design and potentially occupying excessive internal space of the battery.

[0069] In some embodiments of this disclosure, as shown in Figures 13 and 14, the lead plates include a positive lead plate 141 and a negative lead plate 142. The conductive posts include a positive conductive post 131 and a negative conductive post 132. The positive conductive post 131 penetrates the battery housing 110 and connects to the positive lead plate 141. The negative conductive post 132 penetrates the battery housing 110 and connects to the negative lead plate 142. The positive lead plate 141 connects to the positive tab of the electrode core 120, and the negative lead plate 142 connects to the negative tab of the electrode core 120.

[0070] Cross-sectional area s of positive electrode lead plate 141 positive lead The relationship between the battery capacity C and the current is 5 ≤ ​​C / s positive lead ≤ 12, and the cross-sectional area s of the negative electrode lead plate 142 negative lead The relationship between the battery capacity C and the current is 6 ≤ C / s negative leadThe value is ≤15. The positive electrode lead plate 141 may be an aluminum sheet, and the negative electrode lead plate 142 may be a copper sheet. If the cross-sectional area is the same, the current-conducting capacity of the aluminum sheet is smaller than that of the copper sheet. Therefore, if the positive electrode lead plate 141 and the negative electrode lead plate 142 have the same current capacity, the cross-sectional area of ​​the copper sheet may be smaller.

[0071] In some embodiments of this disclosure, the cross-sectional area of ​​the positive electrode lead plate 141 is 14 mm². 2 From 150mm 2 The range is up to 10 mm², and the cross-sectional area of ​​the negative electrode lead plate 142 is 10 mm². 2 From 130mm 2 The range is from 30Ah to 400Ah.

[0072] The following describes the comparative examples (i.e., related technologies) and embodiments 1 to 8 (i.e., embodiments of the present disclosure) in Table 2. Under the same operating conditions, the batteries of the comparative examples and embodiments 1 to 8 are rapidly charged at a rate of 2C, and the temperature rise curves of the positive electrode lead plate 141 and the negative electrode lead plate 142 are recorded. The cross-sectional area s of the positive electrode lead plate 141 in the comparative examples and embodiments 1 to 8 positive lead , cross-sectional area s of the negative electrode lead plate 142 negative leadThe total battery capacity C is selected from the data in Table 2 below. Figure 29 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 1. Figure 30 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 2. Figure 31 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 3. Figure 32 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 4. Figure 33 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 5. Figure 34 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 6. Figure 35 is a temperature rise curve diagram of the positive electrode lead plate 141 and negative electrode lead plate 142 in the comparative example and embodiment 7. Figure 36 shows the temperature rise curves of the positive electrode lead plate 141 and the negative electrode lead plate 142 in the comparative example and embodiment 8.

[0073] [Table 2]

[0074] Compared to the comparative example, embodiments 1 to 8 show lower temperature rises for the positive electrode lead plate 141 and the negative electrode lead plate 142, ensuring that the battery is in good working condition.

[0075] Furthermore, as shown in Figures 13 and 14, the positive electrode lead plate 141 and the negative electrode lead plate 142 have the same structure and include a connected first and second connect sheet, respectively. The second connect sheet of the positive electrode lead plate 141 is directly opposite the fifth plate piece 115 and is fixedly connected to the positive electrode tab of the electrode core 120; the first connect sheet of the positive electrode lead plate 141 is directly opposite the first plate piece 111 and is connected to the positive electrode conductive post 131; the second connect sheet of the negative electrode lead plate 142 is directly opposite the fifth plate piece 115 and is fixedly connected to the negative electrode tab of the electrode core 120; and the first connect sheet of the negative electrode lead plate 142 is directly opposite the second plate piece 112 and is connected to the negative electrode conductive post 132. For ease of explanation, the first connection sheet of the positive electrode lead plate 141 may be referred to as the first positive electrode connection sheet 141a, and the second connection sheet of the positive electrode lead plate 141 may be referred to as the second positive electrode connection sheet 141b. Similarly, the first connection sheet of the negative electrode lead plate 142 may be referred to as the first negative electrode connection sheet 142a, and the second connection sheet of the negative electrode lead plate 142 may be referred to as the second negative electrode connection sheet 142b.

[0076] In some embodiments of this disclosure, the size of both the first positive electrode connection sheet 141a and the first negative electrode connection sheet 142a is in the range of 0.8 mm to 2 mm in the longitudinal direction of the battery housing.

[0077] The battery housing 110 includes a first plate piece 111 and a second plate piece 112 that are facing each other in the longitudinal direction. The first connection sheet of the positive electrode lead plate 141 (i.e., the first positive electrode connection sheet 141a) is parallel to the first plate piece 111, and the first connection sheet of the negative electrode lead plate 142 (i.e., the first negative electrode connection sheet 142a) is parallel to the second plate piece 112.

[0078] A first insulating spacer 161 is placed between the positive electrode lead plate 141 and the first plate piece 111, and the positive electrode conductive post 131 is connected to the positive electrode lead plate 141 by passing through the first insulating spacer 161. A second insulating spacer 162 is placed between the negative electrode lead plate 142 and the second plate piece 112, and the negative electrode conductive post 132 is connected to the negative electrode lead plate 142 by passing through the second insulating spacer 162. This avoids direct contact between the positive electrode lead plate 141 and the negative electrode lead plate 142 and the battery housing 110, thereby improving the overall safety performance of the battery 100.

[0079] At least a portion of the first insulating spacer 161 is positioned between the second connection sheet and the fifth plate piece 115 of the positive electrode lead plate 141, and at least a portion of the second insulating spacer 162 is positioned between the second connection sheet and the fifth plate piece 115 of the negative electrode lead plate 142. In other words, the first insulating spacer 161 may not only separate the positive electrode lead plate 141 from the first plate piece 111, but also from the fifth plate piece 115. The second insulating spacer 162 may not only separate the negative electrode lead plate 142 from the second plate piece 112, but also from the fifth plate piece 115.

[0080] As shown in Figures 1 to 14, the first insulating spacer 161 includes a first support piece 161a and a first insulating piece connected to the first support piece 161a. The inner and outer ends of the first support piece 161a abut against the end of the electrode core 120 of the battery 100 and the first plate piece 111, respectively, and the first insulating piece is aligned with the positive electrode lead plate 141 and positioned between the positive electrode lead plate 141 and the battery housing 110. The second insulating spacer 162 includes a second support piece 162a and a second insulating piece connected to the second support piece 162a. The inner and outer ends of the second support piece 162a abut against the end of the electrode core 120 of the battery 100 and the second plate piece 112, respectively, and the second insulating piece is aligned with the negative electrode lead plate 142 and positioned between the negative electrode lead plate 142 and the battery housing 110.

[0081] The first insulating piece includes a first insulating vertical plate 161b and a first insulating horizontal plate 161c. The first insulating vertical plate 161b is positioned between the first positive electrode connection sheet 141a and the first plate piece 111, and the first insulating horizontal plate 161c is positioned between the second positive electrode connection sheet 141b and the fifth plate piece 115. The second insulating piece includes a second insulating vertical plate 162b and a second insulating horizontal plate 162c. The second insulating vertical plate 162b is positioned between the first negative electrode connection sheet 142a and the second plate piece 112, and the second insulating horizontal plate 162c is positioned between the second negative electrode connection sheet 142b and the fifth plate piece 115.

[0082] The longitudinal thickness of the battery housing 110 of the first support piece 161a is greater than the longitudinal thickness of the battery housing 110 of the first insulating vertical plate 161b. Therefore, the first support piece 161a can abut against one end of the electrode core 120. The longitudinal thickness of the battery housing 110 of the second support piece 162a is greater than the longitudinal thickness of the battery housing 110 of the second insulating vertical plate 162b. Therefore, the second support piece 162a can abut against the other end of the electrode core 120. Thus, the first support piece 161a and the second support piece 162a connect to and abut against the electrode core 120 in the longitudinal direction of the battery housing 110, preventing movement of the electrode core 120 in the longitudinal direction of the battery housing 110.

[0083] Specifically, the first insulating vertical plate 161b is positioned between the first positive electrode connection sheet 141a and the first plate piece 111, the first insulating horizontal plate 161c is positioned between the second positive electrode connection sheet 141b and the fifth plate piece 115, the second insulating vertical plate 162b is positioned between the first negative electrode connection sheet 142a and the second plate piece 112, and the second insulating horizontal plate 162c is positioned between the second negative electrode connection sheet 142b and the fifth plate piece 115.

[0084] The positive electrode lead plate 141 and the first insulating piece may each be configured as an "L" shape, and the positive electrode lead plate 141 may be placed inside the first insulating piece, and the two are bonded to each other. The negative electrode lead plate 142 and the second insulating piece may each be configured as an "L" shape, and the negative electrode lead plate 142 may be placed inside the second insulating spacer piece, and the two are bonded to each other.

[0085] In some embodiments of this disclosure, the sizes of the first insulating vertical plate 161b and the first positive electrode connection sheet 141a are in the range of 0.3 mm to 1.5 mm in the longitudinal direction of the battery housing 110, respectively. That is, the thickness of the first insulating vertical plate 161b and the thickness of the first positive electrode connection sheet 141a are in the range of 0.3 mm to 1.5 mm, respectively.

[0086] This ensures that the positive electrode lead plate 141 and the negative electrode lead plate 142 are insulated from the battery housing 110 and minimize the space occupied in the longitudinal direction of the battery housing 110. If the thickness is less than 0.3 mm, the welding heat when the tab and lead plate are welded together may melt the spacer, resulting in insufficient insulation. If the thickness exceeds 1.5 mm, the space of the electrode core 120 will be excessively occupied, resulting in reduced space utilization and affecting the design capacity of the battery 100.

[0087] The battery 100 in the embodiments of this disclosure further includes a sealing ring. The sealing ring is hermetically connected between the conductive post and the battery housing 110, and the sealing ring is configured as an elastic member and an insulating member, so that the lead plate can be effectively isolated from the battery housing 110. The initial size of the sealing ring in the axial direction is d1, and the size of the sealing ring after compression in the axial direction is d2, such that d1 and d2 satisfy 0.5 ≤ d2 / d1 ≤ 0.9. The units of d1 and d2 are both mm.

[0088] In some embodiments, the sealing ring is fitted onto a conductive post and sandwiched between the inner wall of the battery housing 110 and the lead plate. It should be noted that the initial axial size d1 of the sealing ring may be understood as the axial size of the sealing ring after it has elastically returned to its original position after depressurization (d1 is the distance between the two opposing end faces of the sealing ring in the axial direction after it has returned to its original position). If the sealing ring is sandwiched between the inner wall of the battery housing and the lead plate, d2 may be understood as the distance between the two opposing faces of the sealing ring along its axial direction. One of the two faces is the face of the sealing ring that contacts the inner wall of the battery housing, and the other face is the face of the sealing ring that contacts the lead plate.

[0089] The initial axial size of the sealing ring is the axial size of the sealing ring when it is not compressed. After the sealing ring is compressed, its size decreases axially. However, the ratio between the compressed size of the sealing ring and its initial size is limited. This ensures that the sealing ring has a compressible amount, facilitates the installation of spacers between the lead plate and the conductive posts, and also ensures the sealing performance between the lead plate and the battery housing 110, and between the conductive posts and the sealing ring. In addition, the battery capacity is improved without changing the size of the battery.

[0090] After the sealing ring is compressed, its axial size decreases. Consequently, its radial size inevitably increases, and the two axial sides of the sealing ring each form a ring, with the outer axial end of the sealing ring in contact with the inner wall of the battery housing 110 and the inner axial end of the sealing ring in contact with the lead plate. Thus, both axial ends of the sealing ring are sandwiched between the battery housing 110 and the lead plate.

[0091] At least one of the widths of the contact area between the sealing ring and the inner wall of the battery housing 110, and the width of the contact area between the sealing ring and the lead plate, is W, where W satisfies 1.2 mm ≤ W ≤ 2.5 mm. This ensures sealing between the sealing ring and the inner wall of the battery housing 110, and sealing between the sealing ring and the lead plate. The width of the contact area between the sealing ring and the inner wall of the battery housing 110 may be understood as the distance between the two outer contours of the sealing ring in the radial direction of the contact area between the sealing ring and the inner wall of the battery housing 110. The width of the contact area between the sealing ring and the lead plate may be understood as the distance between the two outer contours of the sealing ring in the radial direction of the contact area between the sealing ring and the lead plate.

[0092] In other embodiments of the present disclosure, as shown in Figures 19 and 20, a sealing ring is fitted onto a conductive post, a flange is further positioned on the outer circumferential surface of the conductive post, the flange is connected to a lead plate, and at least a portion of the sealing ring is sandwiched between the flange and the inner wall of the battery housing. When the sealing ring is sandwiched between the inner wall of the battery housing and the flange, it should be noted that d2 may be understood as the distance between two opposing surfaces of the sealing ring along the axial direction of the sealing ring. One of the two surfaces is the surface of the sealing ring that contacts the inner wall of the battery housing, and the other surface is the surface of the sealing ring that contacts the flange.

[0093] In other words, the inner end of the sealing ring does not contact the lead plate, but contacts the flange of the conductive post. Specifically, the sealing ring includes a first sealing ring 151 and a second sealing ring 152. The first sealing ring 151 is fitted onto the positive conductive post, with a portion of the first sealing ring 151 extending into the via 102 of the first plate piece 111, and the other portion of the first sealing ring 151 sandwiched between the positive conductive post flange 131e of the positive conductive post and the first plate piece 111. The second sealing ring 152 is fitted onto the negative conductive post, with a portion of the second sealing ring 152 extending into the via 102 of the second plate piece 112, and the other portion of the second sealing ring 152 sandwiched between the negative conductive post flange 132e of the negative conductive post and the second plate piece 112.

[0094] In some embodiments of the present disclosure, a spacer is placed between the lead plate and the battery housing 110, and both the conductive post and the sealing ring pass through the spacer, with the inner end of the conductive post connected to the lead plate and the inner end of the sealing ring in contact with the lead plate. The sealing ring is fitted onto the outer circumferential surface of the conductive post. The sealing ring may be inserted together with the conductive post into a via on the battery housing 110 through which the conductive post passes. Alternatively, the sealing ring does not have to enter the via, and as a result the sealing ring can ensure that the conductive post does not move radially through the via and avoid contact with the inner circumferential surface of the via.

[0095] Specifically, in order to restrict the radial movement of the sealing ring and conductive post of the via, a portion of the inner end of the sealing ring may be aligned with a stepped piece of the spacer, and the other portion of the inner end of the sealing ring may be in contact with the lead plate.

[0096] In some embodiments of this disclosure, the spacer includes a support piece and an insulating piece connected to the support piece. The inner and outer ends of the support piece abut against the electrode core 120 and the battery housing 110 of the battery 100, respectively. The insulating piece is aligned with the lead plate and positioned between the lead plate and the battery housing 110.

[0097] The insulating piece and the lead plate may have substantially the same structure, for example, each may be configured as an "L" shape. The insulating piece includes a vertical insulating plate and a horizontal insulating plate connected vertically. The lead plate includes a first connecting sheet and a second connecting sheet connected vertically. The vertical insulating plate may be positioned between the first connecting sheet and one side plate of the housing, and the horizontal insulating plate may be positioned between the second connecting sheet and one side plate of the housing.

[0098] In some embodiments of this disclosure, the battery housing 110 is constructed from an aluminum alloy piece, and the thickness of the lower housing and the sixth plate piece 116 ranges from 0.2 mm to 0.5 mm. Due to the low hardness of the aluminum alloy piece, the thickness of the lower housing and the sixth plate piece 116 need to be set to a greater thickness in order to ensure the structural strength of the battery housing 110.

[0099] In some other embodiments of this disclosure, the battery housing 110 is constructed from a stainless steel sheet or a nickel-plated steel sheet, with the thickness of the lower housing and the thickness of the sixth sheet 116 ranging from 0.05 mm to 0.2 mm. Because stainless steel sheets or nickel-plated steel sheets have high hardness, the thickness of the lower housing and the thickness of the sixth sheet 116 may be set to be smaller. This reduces the manufacturing cost of the battery housing 110 while ensuring the structural strength of the battery housing 110.

[0100] It should be noted that the plate thickness of the lower housing is one of the thicknesses of the first plate piece 111, the second plate piece 112, the third plate piece 113, the fourth plate piece 114, and the fifth plate piece 115.

[0101] As shown in Figures 16 to 18, a positive electrode lead plate 141 and a negative electrode lead plate 142 are arranged within the battery housing 110, and the positive electrode lead plate 141 and the negative electrode lead plate 142 are connected to the positive electrode tab and the negative electrode tab of the electrode core 120, respectively. The positive electrode lead plate 141 includes a first positive electrode connection sheet 141a, and the negative electrode lead plate 142 includes a first negative electrode connection sheet 142a. The first positive electrode connection sheet 141a and the first negative electrode connection sheet 142a are distributed at both ends of the electrode core 120 in the longitudinal direction of the battery housing 110. The distance between the first positive electrode connection sheet 141a and the first negative electrode connection sheet 142a in the longitudinal direction of the battery housing 110 is L1, and the size of the battery 100 in the longitudinal direction of the battery housing 110 is L. L1 and L satisfy 0.95 ≤ L1 / L ≤ 0.99. The first positive electrode connection sheet 141a has a first surface facing the first negative electrode connection sheet 142a, and the first negative electrode connection sheet 142a has a second surface facing the first positive electrode connection sheet 141a, and the distance between the first surface of the first positive electrode connection sheet 141a and the second surface of the first negative electrode connection sheet 142a in the longitudinal direction of the battery housing 110 may be understood as L1. The battery housing 110 has a first surface and a second surface facing each other in the longitudinal direction, and the distance between the first surface and the second surface of the battery housing 110 in the longitudinal direction of the battery housing 110 is L. It should be noted that the longitudinal direction of the battery housing 110 coincides with the longitudinal direction of the battery 100.

[0102] In some embodiments, the positive electrode lead plate 141 includes a connected second positive electrode connection sheet 141b and a first positive electrode connection sheet 141a. The negative electrode lead plate 142 includes a connected second negative electrode connection sheet 142b and a first negative electrode connection sheet 142a. Thus, "L1" in this disclosure is the distance between the inner surface of the first positive electrode connection sheet 141a and the inner surface of the first negative electrode connection sheet 142a in the longitudinal direction of the battery housing 110.

[0103] L1 and L satisfy 0.95 ≤ L1 / L ≤ 0.99. It can be ensured that the positive electrode lead plate 141 and the negative electrode lead plate 142 have sufficient conductivity, and that they do not excessively occupy the internal space of the battery housing 110, especially in the longitudinal direction.

[0104] In some embodiments of this disclosure, the thickness of the first positive electrode connection sheet 141a is in the range of 0.6 mm to 2 mm, and the thickness of the first negative electrode connection sheet 142a is in the range of 0.6 mm to 2 mm. The thickness of the first positive electrode connection sheet 141a is the size of the first positive electrode connection sheet 141a in the longitudinal direction of the battery housing, and the thickness of the first negative electrode connection sheet 142a is the size of the first negative electrode connection sheet 142a in the longitudinal direction of the battery housing.

[0105] The positive electrode lead plate 141 may be configured in an "L" shape and be an integrally formed component, and the negative electrode lead plate 142 may also be configured in an "L" shape and be an integrally formed component. The thickness of the positive electrode lead plate 141 may be the thickness of the first positive electrode connection sheet 141a, and the thickness of the negative electrode lead plate 142 may be the thickness of the first negative electrode connection sheet 142a. This is because the thickness of the first positive electrode connection sheet 141a and the first negative electrode connection sheet 142a affect the extent to which the space occupied by the positive electrode lead plate 141 and the negative electrode lead plate 142 in the longitudinal direction of the battery housing 110 is affected. Therefore, the thickness of the positive electrode lead plate 141 is limited to 0.6 mm to 2 mm, and the thickness of the negative electrode lead plate 142 is limited to 0.6 mm to 2 mm. The positive electrode lead plate 141 and the negative electrode lead plate 142 do not occupy an excessive amount of internal space in the battery housing 110, and in particular, they do not occupy much space in the longitudinal direction of the battery housing 110. Therefore, the battery capacity is improved without changing the size of the battery. The positive electrode conductive post 131 is positioned on the first plate piece 111, and the negative electrode conductive post 132 is positioned on the second plate piece 112. However, the positive electrode conductive post 131 does not directly contact the first plate piece 111, and the negative electrode conductive post 132 does not directly contact the second plate piece 112.

[0106] The first positive electrode connection sheet 141a is parallel to the first plate piece 111 and connected to the positive electrode conductive post 131, and the first negative electrode connection sheet 142a is parallel to the second plate piece 112 and connected to the negative electrode conductive post 132, and the distance between the inner surface of the first positive electrode connection sheet 141a and the inner surface of the negative electrode lead plate in the longitudinal direction of the battery housing 110 is "L1".

[0107] In some embodiments, the electrode core 120 has a first end face and a second end face that face each other. The positive electrode tab of the electrode core 120 is drawn out from the first end face. The negative electrode tab of the electrode core 120 is drawn out from the second end face. The distance between the first end face of the electrode core 120 and the first positive electrode connection sheet 141a in the longitudinal direction of the battery housing 110 is in the range of 2 mm to 12 mm, and the distance between the second end face of the electrode core 120 and the first negative electrode connection sheet 142a in the longitudinal direction of the battery housing 110 is in the range of 2 mm to 12 mm.

[0108] The battery housing 110 further includes a third plate piece 113 and a fourth plate piece 114 that face each other in the width direction. The distance between the inner surfaces of the third plate piece 113 and the fourth plate piece 114 in the width direction of the battery housing 110 is H1, and the size of the battery 100 in the width direction of the battery housing 110 is H. H1 and H satisfy 0.92 ≤ H1 / H ≤ 0.98. This ensures that the thickness of the third plate piece 113 and the fourth plate piece 114 provides sufficient strength to the battery housing 110, and that the capacity of the battery 100 is not affected by the reduction of space within the battery housing 110 due to the large thickness of the third plate piece 113 and the fourth plate piece 114. It should be noted that the width direction of the battery housing 110 coincides with the width direction of the battery 100.

[0109] In some embodiments of this disclosure, the battery housing 110 further includes a fifth plate 115 and a sixth plate 116 facing each other in the thickness direction. The distance between the inner surfaces of the fifth plate 115 and the sixth plate 116 in the thickness direction of the battery housing 110 is D1, and the size of the battery 100 in the thickness direction of the battery housing 110 is D. L > H > D, and D1 and D satisfy 0.93 ≤ D1 / D ≤ 0.99. Therefore, the thicknesses of the fifth plate 115 and the sixth plate 116 are not excessively large, and as a result, when the volume of the battery housing 110 is fixed, the fifth plate 115 and the sixth plate 116 do not excessively occupy the internal space of the battery housing 110. In addition, the fifth plate 115 and the sixth plate 116 have a certain thickness, which may further ensure that the battery housing 110 has sufficient structural strength. It should be noted that the thickness direction of the battery housing 110 coincides with the thickness direction of the battery 100.

[0110] The second positive electrode connection sheet 141b is positioned on the first positive electrode connection sheet 141a and extends toward the inside of the battery housing 110, and the second negative electrode connection sheet 142b is connected to the first negative electrode connection sheet 142a and extends toward the inside of the battery housing 110, with both the second positive electrode connection sheet 141b and the second negative electrode connection sheet 142b being parallel to the fifth plate piece 115 and the sixth plate piece 116. Specifically, both the second positive electrode connection sheet 141b and the second negative electrode connection sheet 142b are bonded to the inner surface of the fifth plate piece 115.

[0111] The battery in the embodiments of this disclosure includes a lower housing and an upper housing. The upper housing and the lower housing may be connected by welding. After the lower housing and the upper housing are fixed to each other, both the upper housing and the lower housing limit the housing space for accommodating the electrode core 120.

[0112] According to some embodiments of the present disclosure, the lower housing comprises a first plate piece 111 and a second plate piece 112, the first plate piece 111 and the second plate piece 112 facing each other in the longitudinal direction of the battery 100, and a third plate piece 113 and a fourth plate piece 114, the third plate piece 113 and the fourth plate piece 114 facing each other in the width direction of the battery 100, the third plate piece 113 facing the first plate piece 111 and the second plate piece in the width direction of the battery 100 The battery 100 includes a third plate piece 113 and a fourth plate piece 114, each separately connected to one end on the same side of the first plate piece 111 and the second plate piece 112, with the fourth plate piece 114 separately connected to the other end on the same side of the first plate piece 111 and the second plate piece 112 in the width direction of the battery 100, and a fifth plate piece 115, the outer peripheral edge of which the fifth plate piece 115 is separately connected to one end on the same side of the first plate piece 111, the second plate piece 112, the third plate piece 113, and the fourth plate piece 114 in the thickness direction of the battery 100. The first plate piece 111, the second plate piece 112, the third plate piece 113, and the fourth plate piece 114 constitute the circumferential side walls of the lower housing. Therefore, the opening in the lower housing is very large, which in turn allows the electrode core 120 to be conveniently installed inside the battery housing 110, improving the installation efficiency of the battery 100.

[0113] Furthermore, the first plate piece 111, the second plate piece 112, the third plate piece 113, the fourth plate piece 114, and the fifth plate piece 115 are integrally formed members. The lower housing may be integrally formed by sheet metal punching. Therefore, the molding efficiency of the lower housing is greatly improved, and the structural strength of the lower housing is also strengthened. The upper housing is configured as a sixth plate piece 116, and the sixth plate piece 116 and the fifth plate piece 115 are directly opposite each other in the thickness direction of the battery 100.

[0114] The battery according to this disclosure includes a battery housing 110, an electrode core 120, a lead piece, and a spacer.

[0115] As shown in Figures 1 to 15, the battery housing 110 has a housing space in which the electrode core 120 and the lead plate are arranged, and the lead plate is connected to the tabs of the electrode core 120. Part of the spacer is sandwiched between the lead plate and the battery housing 110, and the other part of the spacer is sandwiched between the end of the electrode core 120 and the battery housing 110.

[0116] In other words, the spacer of this disclosure not only separates the lead plate from the battery housing 110 to avoid short circuits caused by contact between the lead plate and the battery housing 110, but may also abut both ends of the electrode core 120 to prevent movement of the electrode core 120 in the direction of the battery housing 110, thereby improving the stability of the electrode core. Thus, it is ensured that the tabs positioned on the electrode core 120 do not move, and the connection stability between the tabs and the lead plate is improved.

[0117] In some embodiments of this disclosure, the spacer includes a support piece and an insulating piece connected to the support piece, the support piece being sandwiched between the end of the electrode core 120 and the battery housing 110, and the insulating piece being aligned with the lead plate and sandwiched between the lead plate and the battery housing 110. In practice, not only is the insulating piece insulating, but the support piece is also an insulating member. The support piece and the insulating piece may each be integrally formed members.

[0118] Both ends of the support piece may be in contact with the ends of the electrode core 120 and the inner wall of the battery housing 110, and the insulating piece may be aligned with the lead plate. In addition, to avoid leakage phenomena caused by direct contact between the lead plate and the battery housing 110, the insulating piece may be placed with an additional gap between the lead plate and the battery housing 110.

[0119] Furthermore, the drawer plate may be configured in an "L" shape and include a first connecting sheet and a second connecting sheet, the first connecting sheet being connected to the second connecting sheet, the first connecting sheet being parallel to the side plate of the battery housing 110 in the longitudinal direction, and the second connecting sheet being parallel to the side plate of the battery housing 110 in the thickness direction.

[0120] The insulating piece is also configured in an "L" shape and includes an insulating piece vertical plate and an insulating piece horizontal plate. The insulating piece vertical plate is connected to the insulating piece horizontal plate, and the insulating piece vertical plate is positioned in the longitudinal direction between the first connecting sheet and the side plate of the battery housing 110, while the insulating piece horizontal plate is positioned in the thickness direction between the second connecting sheet and the side plate of the battery housing 110.

[0121] The size of the support piece in the longitudinal direction of the battery housing 110 is larger than the size of the insulating vertical plate in the longitudinal direction of the battery housing 110, and the support piece protrudes toward the center of the battery housing 110 relative to the insulating vertical plate, so that the support piece can abut against the end of the electrode core 120, while the end of the electrode core 120 does not abut against the insulating vertical plate.

[0122] To avoid direct contact with the battery housing 110, it may be understood that the L-shaped lead plate may be positioned inside the L-shaped insulating piece so that the insulating piece can enclose the entire lead plate.

[0123] Furthermore, the outer surface of the support piece is coplanar with the outer surface of the vertical insulating plate, and the inner surface of the support piece is coplanar with the inner end of the horizontal insulating plate. In other words, the size of the support piece projecting inward relative to the vertical insulating plate is the size of the horizontal insulating plate in the longitudinal direction. When the second connecting sheet on the horizontal insulating plate is superimposed on and connected to the tab of the electrode core 120, the support piece abuts against the longitudinal end of the electrode core 120.

[0124] In some embodiments of this disclosure, the insulating vertical plate is provided with an electrolyte immersion through-hole 101 and vias through which conductive posts pass. The conductive posts pass through the vias of the insulating plate and are connected to a first connecting sheet. The provision of the electrolyte immersion through-hole 101 in the insulating plate may facilitate the injection of electrolyte into the battery housing 110. In addition, gases within the battery housing 110 may be discharged through the electrolyte immersion through-hole 101. The electrolyte immersion through-hole 101 may be understood to be directly opposite the explosion-proof valve and liquid injection hole of the battery 100 on the battery housing 110 in the longitudinal direction of the battery housing 110.

[0125] In some embodiments of the present disclosure, the battery housing 110 includes a first plate 111 and a second plate 112 facing each other in the longitudinal direction of the battery housing 110, a third plate 113 and a fourth plate 114 facing each other in the width direction of the battery housing 110, and a fifth plate 115 and a sixth plate 116 facing each other in the thickness direction of the battery housing 110. The first plate 111, the second plate 112, the third plate 113, the fourth plate 114, and the fifth plate 115 constitute a lower housing with one side open, and the sixth plate 116 is fixed to the lower housing so as to close the open end.

[0126] The lead plate includes a positive lead plate 141 and a negative lead plate 142. The positive lead plate 141 is separately connected to the positive conductive post 131 and the positive tab of the electrode core 120, and the negative lead plate 142 is separately connected to the negative conductive post 132 and the negative tab of the electrode core 120.

[0127] The spacer includes a first insulating spacer 161 and a second insulating spacer 162. The vertical spacer plate of the first insulating spacer 161 is positioned between the first plate piece 111 and the first connection sheet of the positive electrode lead plate 141, the horizontal spacer plate of the first insulating spacer 161 is positioned between the fifth plate piece 115 and the second connection sheet of the positive electrode lead plate 141, the vertical spacer plate of the second insulating spacer 162 is positioned between the second plate piece 112 and the first connection sheet of the negative electrode lead plate 142, and the horizontal spacer plate of the second insulating spacer 162 is positioned between the fifth plate piece 115 and the second connection sheet of the negative electrode lead plate 142.

[0128] The electrode core 120 is placed directly within the lower housing, and then the tabs are welded to the lead plate. The welding method may be laser welding, resistance welding, or another welding method. The lead plate is designed in an L-shape to facilitate welding with the tabs. After the electrode core 120 is assembled integrally within the housing, the tabs are necessarily straightened, and the lead plate may be superimposed. The tabs may then be welded together with the lead plate to avoid the risk of positive or negative electrode contact due to curved tabs, reduce tab size, increase the utilization rate of the metal current collector, improve process yield, and reduce product cost.

[0129] After the tabs of the electrode core 120 are welded to the pull-out plate of the lower housing, the upper housing (sixth plate piece 116) is assembled. After the upper and lower housings are assembled, they are sealed and joined by laser welding or crimping, so that the upper and lower housings form a seal.

[0130] After the battery housing 110 is assembled, liquid injection may be performed through the liquid injection hole. After liquid injection is complete, the liquid injection hole needs to be sealed, and the sealing method is metal plate welding or rubber plug sealing. Explosion-proof valves for the battery 100 are placed on the first plate piece 111 or the second plate piece 112, and one or more explosion-proof valves may be placed on the first plate piece 111 or the second plate piece 112.

[0131] The explosion-proof valve is formed by laser engraving or direct punching into the side plate on the battery housing 110. Alternatively, a hole of the same shape and size as the explosion-proof valve may be punched into the battery housing 110, and then the explosion-proof valve is welded to the battery housing 110.

[0132] According to some embodiments of the present disclosure, the pull-out plate is configured in an "L" shape. A second connecting sheet is connected to one side of the first connecting sheet and extends toward the inside of the housing, and the second connecting sheet extending toward the inside of the housing may be welded and fixed together with a plurality of tabs, so that the plurality of tabs do not bend excessively and the tabs become flatter during and after welding.

[0133] In other embodiments of the present disclosure, the drawer plate is configured as a "T" shape, and a second connecting sheet is connected to an intermediate region of the first connecting sheet and extends toward the inside of the battery housing 110. Since the "T" shaped drawer plate still has a second connecting sheet extending toward the inside of the housing, the tabs can still be welded evenly to the second connecting sheet, the tabs do not bend excessively, and the connection stability between the tabs and the drawer plate is greatly improved. Some portions of the tabs may be welded to one side of the second connecting sheet in the thickness direction, and other portions of the tabs may be welded to the other side of the second connecting sheet in the thickness direction.

[0134] The first connecting sheet may be parallel to the first plate piece 111 and the second plate piece 112, and the conductive post may be fitted onto the first plate piece 111 or the second plate piece 112 and connected to the first connecting sheet.

[0135] The conductive posts include a positive electrode conductive post 131 and a negative electrode conductive post 132. The lead plate includes a positive electrode lead plate 141 and a negative electrode lead plate 142. The positive electrode conductive post 131 is connected to a first connecting sheet of the positive electrode lead plate 141 by passing through a first plate piece 111, and the negative electrode conductive post 132 is connected to a first connecting sheet of the negative electrode lead plate 142 by passing through a second plate piece 112. In addition, the second connecting sheet is parallel to a fifth plate piece 115 or a sixth plate piece 116.

[0136] It should be noted that in the battery 100 of this disclosure, the conductive posts include a positive electrode conductive post 131 and a negative electrode conductive post 132, the lead plates include a positive electrode lead plate 141 and a negative electrode lead plate 142, and the tabs include a positive electrode tab and a negative electrode tab. The positive electrode lead plate 141 includes a first positive electrode connection sheet 141a and a second positive electrode connection sheet 141b, and the negative electrode lead plate 142 includes a first negative electrode connection sheet 142a and a second negative electrode connection sheet 142b.

[0137] The spacer is positioned between the drawer plate and the battery housing 110, and the conductive post passes through the spacer and connects to the drawer plate. The spacer may improve the safety performance of the battery 100 by avoiding direct contact between the drawer plate and the battery housing 110, thereby avoiding the risk of the battery housing 110 becoming charged.

[0138] In some embodiments of this disclosure, the spacer includes a support piece and an insulating piece connected to the support piece, the support piece being sandwiched between the end of the electrode core 120 and the battery housing 110, and the insulating piece being aligned with the lead plate and sandwiched between the lead plate and the battery housing 110. In practice, not only is the insulating piece insulating, but the support piece is also an insulating member. The support piece and the insulating piece may each be integrally formed members.

[0139] The insulating piece is also configured in an "L" shape and includes an insulating piece vertical plate and an insulating piece horizontal plate. The insulating piece vertical plate is connected to the insulating piece horizontal plate, and the insulating piece vertical plate is positioned in the longitudinal direction between the first connecting sheet and the side plate of the battery housing 110, while the insulating piece horizontal plate is positioned in the thickness direction between the second connecting sheet and the side plate of the battery housing 110.

[0140] The following briefly describes a battery pack according to an embodiment of the present disclosure.

[0141] As shown in Figure 37, the battery pack 1000 according to an embodiment of the present disclosure includes the aforementioned battery 100. Since the battery 100 is located within the battery pack 1000 according to an embodiment of the present disclosure, the safety performance of the battery pack 1000 is enhanced and the power of the battery pack 1000 is further improved.

[0142] The following briefly describes the vehicle 10000 according to an embodiment of the present disclosure.

[0143] As shown in Figure 38, the vehicle 10000 according to the embodiment of the present disclosure includes the aforementioned battery pack 1000. Because the aforementioned battery pack 1000 is placed on the vehicle 10000 according to the embodiment of the present disclosure, the driving range of the vehicle 10000 is greatly improved, and the electrical safety performance of the vehicle 10000 is also greatly improved.

[0144] In addition, as shown in Figure 39, in another embodiment of the present disclosure, the vehicle 10000 includes the aforementioned battery 100. With the battery 100 in the aforementioned embodiment, the driving range of the vehicle 10000 can be improved, and the electrical safety performance of the vehicle 10000 is also significantly improved.

[0145] In this specification, any reference term used, such as “embodiment,” “some embodiments,” “exemplary embodiment,” “one example,” “a specific example,” or “some examples,” means that a particular characteristic, structure, material, or feature described with reference to an embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the exemplary descriptions of the aforementioned terms do not necessarily refer to the same embodiment or example. In addition, the particular characteristics, structure, material, or feature described may be combined in an appropriate manner in one or more embodiments or examples.

[0146] While embodiments of this disclosure are shown and described, those skilled in the art will understand that various modifications, alterations, substitutions, and variations may be made to the embodiments without departing from the principles and purposes of this disclosure, and the scope of this disclosure is defined by the appended claims and their equivalents. [Explanation of symbols]

[0147] 10,000 vehicles 1000 Battery Pack 100 batteries 110 Battery Housing 111 First plate 112 Second plate 113 Third plate 114 The fourth plate 115 The fifth plate 116 The sixth plate 120 electrode cores 131 Positive electrode conductive post 131a First positive electrode conductive post 131b Second positive electrode conductive post 131c First connecting member 131d First insulating plate 131e Positive electrode conductive post flange edge 132 Negative electrode conductive post 132a First negative electrode conductive post 132b Second negative electrode conductive post 132c Second connecting member 132d Second insulating plate 132e Negative electrode conductive post flange 141 Positive electrode lead plate 141a First positive electrode connection sheet 141b Second positive electrode connection sheet 142 Negative electrode lead plate 142a First negative electrode connection sheet 142b Second negative electrode connection sheet 151 First sealing ring 152 Second sealing ring 161 First insulating spacer 161a First support piece 161b First insulating vertical plate 161c First insulating horizontal plate 162 Second insulating spacer 162a Second support piece 162b Second insulating vertical plate 162c Second insulating horizontal plate 101 Electrolyte immersion through hole 102 Beer

Claims

1. Battery housing (110) and Electrode core (120), lead plate, conductive post and A battery (100) comprising the electrode core (120) and the lead plate, all of which are located within the battery housing (110), the lead plate being connected to the electrode core (120), the conductive post penetrating the battery housing (110), and as a result the conductive post being connected to the lead plate, the cross-sectional area s of the lead plate ｌｅａｄ The relationship between the capacity C of the battery (100) and the following is C / s ｌｅａｄ ≤ 15, s ｌｅａｄ The unit is mm ２ The unit of C is Ah, The cross-sectional area s lead of the lead plate is the area of ​​the cross section perpendicular to the direction of current flow or perpendicular to the thickness direction of the lead plate. If the lead plate is designed using a variable cross section, the cross-sectional area s lead of the lead plate is the area of ​​the minimum cross section of the lead plate. The lead plate comprises a positive lead plate (141) and a negative lead plate (142), and the conductive post comprises a positive conductive post (131) and a negative conductive post (132), the positive lead plate (141) is connected to the positive conductive post (131), and the negative lead plate (142) is connected to the negative conductive post (132). The relationship between the cross-sectional area s positive lead of the positive electrode lead plate (141) and the capacity C of the battery (100) is 5 ≤ ​​C / s positive lead ≤ 12, and the relationship between the cross-sectional area s negative lead of the negative electrode lead plate (142) and the capacity C of the battery (100) is 6 ≤ C / s negative lead ≤ 15, and the cross-sections of the positive electrode lead plate (141) and the negative electrode lead plate (142) are planes perpendicular to the direction of current flow, the units of s positive lead and s negative lead are mm², and the unit of C is Ah, in the battery (100).

2. The cross-sectional area of ​​the positive electrode lead plate (141) is 14 mm². ２ 150mm ２ The range is up to 10 mm², and the cross-sectional area of ​​the negative electrode lead plate (142) is 10 mm². ２ 130mm ２ The battery (100) according to claim 1, wherein the capacity C of the battery (100) is in the range of 30 Ah to 400 Ah.

3. The battery (100) according to claim 1, wherein the positive electrode lead plate (141) is an aluminum sheet and the negative electrode lead plate (142) is a copper sheet.

4. The battery (100) according to any one of claims 1 to 3, wherein the positive electrode lead plate (141) and the negative electrode lead plate (142) each comprise a connected first connection sheet and a second connection sheet, the second connection sheet of the positive electrode lead plate (141) being connected to the positive electrode tab of the electrode core (120), the first connection sheet of the positive electrode lead plate (141) being connected to the positive electrode conductive post (131), the second connection sheet of the negative electrode lead plate (142) being connected to the negative electrode tab of the electrode core (120), and the first connection sheet of the negative electrode lead plate (142) being connected to the negative electrode conductive post (132).

5. The battery (100) according to claim 4, wherein the thickness of the first connecting sheet is in the range of 0.6 mm to 2 mm.

6. The battery (100) according to claim 5, wherein the size of the first connecting sheet is in the range of 0.8 mm to 2 mm in the longitudinal direction of the battery (100).

7. The battery (100) according to claim 4, wherein the battery housing (110) comprises a first plate piece (111) and a second plate piece (112) facing each other in the longitudinal direction of the battery (100), and the first connecting sheet of the positive electrode lead plate (141) and the first connecting sheet of the negative electrode lead plate (142) are parallel to the first plate piece (111) and the second plate piece (112), respectively.

8. The battery (100) according to claim 7, wherein the battery housing (110) further comprises a third plate piece (113) and a fourth plate piece (114) facing each other in the width direction of the battery (100), and a fifth plate piece (115) and a sixth plate piece (116) facing each other in the thickness direction of the battery (100), and the second connecting sheet of the positive electrode lead plate (141) and the second connecting sheet of the negative electrode lead plate (142) are parallel to the fifth plate piece (115) and the sixth plate piece (116), respectively.

9. The battery (100) according to claim 8, wherein the first plate piece (111), the second plate piece (112), the third plate piece (113), the fourth plate piece (114), and the fifth plate piece (115) are configured as a lower housing with one side open, and the sixth plate piece (116) is fixedly connected to the lower housing so as to close the open end of the lower housing.

10. The battery (100) according to claim 7, further comprising a first insulating spacer (161) disposed within the battery housing (110), wherein at least a portion of the first insulating spacer (161) is located between the positive electrode lead plate (141) and the first plate piece (111), and the positive electrode conductive post (131) is connected to the positive electrode lead plate (141) by passing through the first insulating spacer (161).

11. The battery (100) according to claim 7, further comprising a second insulating spacer (162) disposed within the battery housing (110), wherein at least a portion of the second insulating spacer (162) is located between the negative electrode lead plate (142) and the second plate piece (112), and the negative electrode conductive post (132) is connected to the negative electrode lead plate (142) by passing through the second insulating spacer (162).

12. The relationship between the cross-sectional area s1 of the positive electrode conductive post (131) and the capacity C of the battery (100) is 6 / 5 ≤ C / s1 ≤ 16 / 3, and the relationship between the cross-sectional area s2 of the negative electrode conductive post (132) and the capacity C of the battery (100) is 6 / 5 ≤ C / s2 ≤ 8. The units of both s1 and s2 are mm ２ It is The cross-sectional area s1 of the positive electrode conductive post (131) is the area of ​​the cross-section perpendicular to the direction of current flow, and if the positive electrode conductive post (131) is designed using a variable cross-section, the cross-sectional area of ​​the positive electrode conductive post (131) is the area of ​​the smallest cross-section of the positive electrode conductive post (131). The cross-sectional area s2 of the negative electrode conductive post (132) is the area of ​​the cross-section perpendicular to the direction of current flow, and if the negative electrode conductive post (132) is designed using a variable cross-section, the cross-sectional area of ​​the negative electrode conductive post (132) is the area of ​​the smallest cross-section of the negative electrode conductive post (132). A battery (100) according to any one of claims 1 to 3.

13. The cross-sectional area s1 of the positive electrode conductive post (131) and the cross-sectional area s2 of the negative electrode conductive post (132) are 12 mm². ２ 315mm ２ The battery (100) according to claim 12, wherein the capacity C of the battery (100) is in the range of 30 Ah to 400 Ah.

14. The battery (100) according to claim 1, wherein the positive electrode conductive post (131) is an aluminum post, and the negative electrode conductive post (132) is a copper post.

15. A battery pack (1000) comprising the battery (100) described in claim 1.

16. A vehicle (10000) comprising the battery (100) according to any one of claims 1 to 3 or the battery pack (1000) according to claim 15.

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