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 TO RELATED APPLICATIONS This disclosure claims priority to and the benefit of Chinese Patent Application No. 202210515990.7, entitled "BATTERY, BATTERY PACK, AND VEHICLE," filed on May 12, 2022, and Chinese Patent Application No. 202222993656.0, entitled "BATTERY, BATTERY PACK, AND VEHICLE," filed on November 10, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of battery technology, and in particular to batteries, battery packs, and vehicles. [Background technology]

[0003] In the battery in the related art, a lead-out plate is disposed in the battery housing and connected between the tab of the electrode core and the conductive post so that the current flows inside and outside the battery. However, in the related art, the lead-out plate has a single size. Either the cross-sectional area of ​​the lead-out plate is too large, which is a waste of resources, or the cross-sectional area of ​​the lead-out plate is too small, which causes heat generation problems and further causes thermal safety problems for the battery. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to solve at least one of the technical problems existing in the related art. Therefore, the objective of the present disclosure is to provide a battery with strong current carrying capability, and ensure that the temperature does not rise excessively and exceed the operating temperature range of the battery due to the small current carrying area during use, thereby avoiding the thermal safety problem of the battery.

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

[0006] The present disclosure further provides a vehicle having the above-described battery pack. [Means for solving the problem]

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

[0008] According to the battery of the present disclosure, the cross-sectional area s lead The relationship between the charge and the capacity of the battery, C, is C / s lead ≦8, which ensures the current-carrying ability of the pull-out plate and also ensures that the temperature of the pull-out plate does not rise excessively during the use of the battery due to the small current-carrying area, so that 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 the thermal safety problem of the battery does not occur.

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

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

[0011] Optionally, the extraction plate includes a positive electrode extraction plate and a negative electrode extraction plate. The conductive posts include a positive electrode conductive post and a negative electrode conductive post. The positive electrode extraction plate is connected to the positive electrode conductive post through the battery housing, and the negative electrode extraction plate is connected to the negative electrode conductive post through the battery housing. The cross-sectional area s of the positive electrode extraction plate positive lead The relationship between the current and the battery capacity C 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 current and the battery capacity C is 6≦C / s negative lead The cross sections of the positive electrode lead plate and the negative electrode lead plate are perpendicular to the direction of current flow, and s positive lead and s negative lead The unit is mm 2 and the unit of C is Ah.

[0012] Optionally, the cross-sectional area of ​​the positive electrode withdrawal plate is 14 mm 2 From 150mm 2 The cross-sectional area of ​​the negative electrode extraction plate is in the range of 10 mm 2 From 130mm 2 and the battery capacity C ranges from 30 Ah to 400 Ah.

[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 and negative electrode extraction plates each include a first and second connection sheet that are connected together, the second connection sheet of the positive electrode extraction plate being connected to a positive electrode tab of the electrode core, the first connection sheet of the positive electrode extraction plate being connected to a positive electrode conductive post, the second connection sheet of the negative electrode extraction plate being connected to a negative electrode tab of the electrode core, and the first connection sheet of the negative electrode extraction plate being connected to a negative electrode conductive post.

[0015] Optionally, the size of the first connecting sheet in the length direction of the battery ranges from 0.8 mm to 2 mm.

[0016] Optionally, the size of the first connecting sheet in the length direction of the battery ranges from 0.6 mm to 2 mm.

[0017] Optionally, the battery housing includes a first plate piece and a second plate piece that face each other in a length direction of the battery, and 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 piece and the second plate piece, respectively.

[0018] Optionally, the battery housing further includes a third plate piece and a fourth plate piece facing each other in a width direction of the battery, and a fifth plate piece and a sixth plate piece facing each other in a 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 plate piece and the sixth plate piece, respectively.

[0019] Optionally, the first plate piece, the second plate piece, the third plate piece, the fourth plate piece, and the fifth plate piece are configured as a lower housing having an open end, and the sixth plate piece is fixedly connected to the lower housing so as to close the open end of the lower housing.

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

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

[0022] Optionally, the relationship between the cross-sectional area s1 of the positive conductive post and the capacity C of the battery is 6 / 5≦C / s1≦16 / 3, and the relationship between the cross-sectional area s2 of the negative conductive post and the capacity C of the battery is 6 / 5≦C / s2≦8, and both s1 and s2 are in mm 2 It is.

[0023] Optionally, the cross-sectional area s1 of the positive conductive post and the cross-sectional area s2 of the negative conductive post are 12 mm 2 From 315mm 2 and the battery capacity C ranges from 30 Ah to 400 Ah.

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

[0025] A battery pack according to the present disclosure includes the battery described above.

[0026] A vehicle according to the present disclosure includes the battery described above or the battery pack described above.

[0027] Additional aspects and advantages of the disclosure will be set forth in the description which follows, and in some cases will be apparent from the description, or may be learned by practice of the disclosure.

[0028] The above and / or additional aspects and advantages of the present disclosure will become apparent and understandable from the following description of the embodiments, taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0029] [Figure 1] FIG. 2 is a view of the lower housing of a battery according to one embodiment of the present disclosure. [Diagram 2] FIG. 1 is a diagram of a battery according to one embodiment of the present disclosure. [Diagram 3] FIG. 3 is an enlarged view of a circled portion C in FIG. [Figure 4] FIG. 1 is a diagram of a battery according to one embodiment of the present disclosure. [Diagram 5] FIG. 5 is an enlarged view of a portion D circled in FIG. [Figure 6] FIG. 2 is a diagram showing a first positive (negative) conductive post or a second positive (negative) conductive post according to an embodiment of the present disclosure, the cross section of which is cylindrical. [Figure 7] FIG. 2 is a diagram showing a first positive (negative) conductive post or a second positive (negative) conductive post according to an embodiment of the present disclosure, in which the cross section is in a racetrack shape. [Figure 8] FIG. 1 is a cross-sectional view of a battery according to one embodiment of the present disclosure. [Figure 9] FIG. 9 is an enlarged view of a circled portion E in FIG. [Figure 10] FIG. 9 is an enlarged view of a circled portion H in FIG. [Figure 11] FIG. 2 is a diagram of a first insulating spacer according to one embodiment of the present disclosure. [Figure 12] FIG. 13 is a diagram of cooperation between a second insulating spacer and a negative electrode extraction plate according to one embodiment of the present disclosure. [Figure 13] FIG. 2 is a diagram of a positive electrode withdrawal plate according to one embodiment of the present disclosure. [Figure 14] FIG. 2 is a diagram of a negative electrode withdrawal plate according to one embodiment of the present disclosure. [Figure 15] FIG. 2 is an exploded view of a battery according to one embodiment of the present disclosure. [Figure 16] FIG. 2 is a diagram of a battery in one orientation according to one embodiment of the present disclosure. [Figure 17] FIG. 2 is a view of a battery in another orientation according to one embodiment of the present disclosure. [Figure 18] FIG. 13 is a diagram of a battery in yet another orientation according to one embodiment of the present disclosure. [Figure 19] FIG. 13 is a diagram of cooperation between a positive conductive post, a sealing ring, and a battery housing of a battery according to another embodiment of the present disclosure. [Figure 20] FIG. 13 is a diagram of cooperation between a negative conductive post, a sealing ring, and a battery housing of a battery according to yet another embodiment of the present disclosure. [Figure 21]FIG. 4 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and in embodiment 1. [Figure 22] FIG. 11 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and in embodiment 2. [Figure 23] FIG. 11 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and embodiment 3. [Figure 24] FIG. 13 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and in embodiment 4. [Diagram 25] FIG. 13 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and in embodiment 5. [Figure 26] FIG. 13 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and in embodiment 6. [Figure 27] FIG. 13 is a temperature rise curve diagram of the positive and negative conductive posts in the comparative example and embodiment 7. [Figure 28] FIG. 13 is a temperature rise curve diagram of a positive electrode conductive post and a negative electrode conductive post in a comparative example and in embodiment 8. [Figure 29] FIG. 4 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 1. [Diagram 30] FIG. 11 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 2. [Diagram 31] FIG. 11 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 3. [Diagram 32] FIG. 13 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 4. [Diagram 33] FIG. 13 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 5. [Diagram 34] FIG. 13 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 6. [Diagram 35]FIG. 13 is a temperature rise curve diagram of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 7. [Diagram 36] FIG. 13 is a graph showing temperature rise curves of a positive electrode extraction plate and a negative electrode extraction plate in a comparative example and in embodiment 8. [Figure 37] FIG. 1 is a diagram of a battery pack according to one embodiment of the present disclosure. [Figure 38] FIG. 1 is a diagram of a vehicle according to one embodiment of the disclosure. [Figure 39] FIG. 2 is a diagram of a vehicle according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions 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 are used only to explain 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 is described below with reference to FIGS.

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

[0033] The electrode core 120 is disposed within the battery housing 110, and the conductive posts penetrate the battery housing 110, such that 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 tabs on 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 s is in mm 2 where C is in Ah.

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

[0035] After extensive experiments and discussions, the inventors of the present disclosure have found that the following relationship is satisfied: C / s≦8, which ensures the current-carrying ability of the conductive posts of the battery 100, and also ensures that the temperature does not rise excessively and exceed the operating temperature range of the battery 100 during use of the battery 100 due to the small current-carrying area, thereby avoiding thermal safety issues of the battery 100.

[0036] In some embodiments of the present 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 the smaller the ratio of the capacity C of the battery to the cross-sectional area s of the conductive post, the better. If the ratio is too small, the size of the conductive post may be excessively large, resulting in a redundant design.

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

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

[0039] The positive conductive post 131 of the battery 100 may be made of an aluminum material, and the negative conductive post 132 may be made of a copper material, and it should be noted that the conductivity of the aluminum material and the copper material is different. When the cross-sectional area is the same, copper has a stronger current-carrying ability than aluminum. Therefore, to ensure that the current-carrying ability of the positive conductive post 131 and the current-carrying ability of the negative conductive post 132 are the same, the cross-sectional area of ​​the negative conductive post 132 made of copper may be made smaller.

[0040] In some embodiments of the present disclosure, the cross-sectional area s1 of the positive conductive post and the cross-sectional area s2 of the negative conductive post are 12 mm 2 From 315mm 2 and the battery capacity C ranges from 30 Ah to 400 Ah.

[0041] The following describes the comparative example (i.e., related art) 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 example and embodiments 1 to 8 are respectively fast-charged at a rate of 2C, and the temperature rise curves of the positive conductive post 131 and the negative conductive post 132 are recorded. The cross-sectional area s1 of the positive conductive post 131, the cross-sectional area s2 of the negative conductive post 132, and the total capacity C of the battery in the comparative example and embodiments 1 to 8 are selected from the data in Table 1 below. FIG. 21 is a temperature rise curve diagram of the positive conductive post 131 and the negative conductive post 132 in the comparative example and embodiment 1. FIG. 22 is a temperature rise curve diagram of the positive conductive post 131 and the negative conductive post 132 in the comparative example and embodiment 2. FIG. 23 is a temperature rise curve diagram of the positive conductive post 131 and the negative conductive post 132 in the comparative example and embodiment 3. FIG. 24 is a temperature rise curve diagram of the positive conductive post 131 and the negative conductive post 132 in the comparative example and embodiment 4. Fig. 25 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 5. Fig. 26 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 6. Fig. 27 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 7. Fig. 28 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 8.

[0042] [Table 1]

[0043] Compared with the comparative example, in the first to eighth embodiments, the temperature rise of the positive conductive post 131 and the negative conductive post 132 is low, which ensures that the battery is in a good working condition.

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

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

[0046] The first connection member 131c is connected between the outer end of the first positive conductive post 131a and the outer end of the second positive conductive post 131b, so that the contact area between the first positive conductive post 131a and the second positive conductive post 131b is increased, and the positive conductive post 131 can be more easily connected to the outside. The second connection member 132c is connected between the outer end of the first negative conductive post 132a and the outer end of the second negative conductive post 132b, so that the contact area between the first negative conductive post 132a and the second negative conductive post 132b is increased, and the negative conductive post 132 can be more easily connected to the outside.

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

[0048] 1 to 4 and 15 to 20, the battery housing 110 includes a first plate piece 111 and a second plate piece 112 facing each other in the length 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 length direction is larger than the size of the battery 100 in the width direction, and the size of the battery 100 in the width direction is larger than the size of the battery 100 in the thickness direction.

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

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

[0051] Furthermore, 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 are provided on the first plate piece 111, and 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 are provided on the second plate piece 112.

[0052] Further disposed within the battery housing 110 are a positive electrode pull plate 141 and a negative electrode pull plate 142. The positive electrode pull plate 141 may be connected to a positive electrode tab of the electrode core 120, and in addition, the positive electrode pull plate 141 is further connected to a positive electrode conductive post 131, and the negative electrode pull plate 142 may be connected to a negative electrode tab of the electrode core 120, and in addition, the negative electrode pull plate 142 is further connected to a negative electrode conductive post 132.

[0053] As shown in Fig. 9 and Fig. 10, a first sealing ring 151 is fitted (sleeved) onto the positive 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 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 manner, the positive conductive post 131 is restricted by the first sealing ring 151 so as not to contact the inner wall of the via that is on the first plate piece 111 and through which the positive conductive post 131 passes, and the negative conductive post 132 is restricted by the second sealing ring 152 so as not to contact the inner wall of the via that is on the second plate piece 112 and through which the negative conductive post 132 passes.

[0054] A first insulating spacer 161 is further disposed between the positive electrode pull-out plate 141 and the first plate piece 111. The positive electrode conductive post 131 penetrates the first insulating spacer 161 and is connected to the positive electrode pull-out plate 141. The first insulating spacer 161 is an insulating member. The first insulating spacer 161 can prevent contact between the positive electrode pull-out plate 141 and the battery housing 110, thereby improving the safety performance of the battery 100.

[0055] A second insulating spacer 162 is further disposed between the negative electrode pull plate 142 and the second plate piece 112. The negative electrode conductive post 132 is connected to the negative electrode pull plate 142 through the second insulating spacer 162. The second insulating spacer 162 is an insulating member. The second insulating spacer 162 can prevent contact between the negative electrode pull plate 142 and the battery housing 110, thereby improving the safety performance of the battery 100.

[0056] Furthermore, a first step piece is disposed on an outer surface of the first insulating spacer 161, which is aligned with an inner end of the first sealing ring 151, and the first step piece may limit the movement of the first sealing ring 151 and the positive conductive post 131 to avoid direct contact between the positive conductive post 131 and the battery housing 110. A second step piece is disposed on an outer surface of the second insulating spacer 162, which is aligned with an inner end of the second sealing ring 152, and the second step piece may limit the movement of the second sealing ring 152 and the negative conductive post 132 to avoid direct contact between the negative conductive post 132 and the battery housing 110.

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

[0058] In some embodiments of the present disclosure, the size of the first insulating piece vertical plate 161b and the second insulating piece vertical plate 162b ranges from 0.3 mm to 1.5 mm, respectively, in the length direction of the battery housing. To ensure that the positive electrode pull plate 141 and the negative electrode pull plate 142 are insulated from the battery housing 110 and minimize the space occupied in the length direction of the battery housing 110, if the thickness is less than 0.3 mm, the welding heat may melt the spacer when the tab and the pull plate are welded, resulting in insufficient insulation. If the thickness is more than 1.5 mm, the space of the electrode core 120 will be excessively occupied, resulting in a decrease in the space utilization rate and an impact on the design capacity of the battery 100. Therefore, through multiple experiments and adjustments by the inventors of the present disclosure, the size of both the first insulating piece vertical plate 161b and the second insulating piece vertical plate 162b is selected as 0.3 mm to 1.5 mm in the length direction of the battery housing 110.

[0059] As shown in Fig. 11 and Fig. 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 end and the outer end 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 pull plate 141 and disposed between the positive electrode pull 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 end and the outer end 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 pull plate 142 and disposed between the negative electrode pull plate 142 and the battery housing 110.

[0060] The first insulating piece includes a first insulating piece vertical plate 161b and a first insulating piece horizontal plate 161c. The first insulating piece vertical plate 161b is disposed between the first positive electrode connection sheet 141a and the first plate piece 111, and the first insulating piece horizontal plate 161c is disposed 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 piece vertical plate 162b and a second insulating piece horizontal plate 162c. The second insulating piece vertical plate 162b is disposed between the first negative electrode connection sheet 142a and the second plate piece 112, and the second insulating piece horizontal plate 162c is disposed 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 the present disclosure, 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 an open side, and the sixth plate piece 116 is fixedly connected to the lower housing 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 instead of a narrow channel, greatly reducing the installation cost and saving the installation time.

[0062] Specifically, the first insulating piece horizontal plate 161c is arranged between the second positive electrode connection sheet 141b and the fifth plate piece 115, and the second insulating piece horizontal plate 162c is arranged 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 length direction of the battery housing 110 is larger than the size of the first insulating piece vertical plate 161b in the length direction of the battery housing 110, and the size of the second support piece 162a in the length direction of the battery housing 110 is larger than the size of the second insulating piece vertical plate 162b in the length direction of the battery housing 110. Therefore, the first support piece 161a and the second support piece 162a may firmly clamp the electrode core 120 in the battery housing 110 to prevent the electrode core 120 from moving in the battery housing 110.

[0064] In some embodiments of the present disclosure, the outer surface of the positive conductive post 131 extends from the battery housing and has 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 conductive post 132 extends from the battery housing and has a distance of 2 mm to 5 mm from the outer surface of the second plate piece 112. Therefore, it is ensured that the positive conductive post 131 and the negative conductive post 132 can have sufficient protrusions to connect to external electrical components. In addition, when the overall length of the battery 100 is fixed, the space in the length direction of the battery 100 is not excessively occupied, ensuring 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 extraction plate are disposed within the battery housing 110, and the extraction plate and the electrode core 120 are connected. Specifically, the extraction plate is connected to the tab of the electrode core 120, the conductive post penetrates the battery housing 110, the inner end of the conductive post is connected to the extraction plate, and the outer end of the conductive post protrudes from the battery housing 110, so that the conductive post can charge and discharge the electrode core 120.

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

[0067] Through extensive experiments, the inventors of the present disclosure have found that this relationship can ensure the current-carrying ability of the pull-out plate, and can ensure that the temperature of the pull-out plate will not rise excessively due to the small current-carrying area during use of the battery 100, so that the internal temperature distribution of the battery 100 will not be affected, and the internal temperature of the battery 100 will not exceed the operating temperature range of the battery 100, and no thermal safety issues will arise for the battery 100.

[0068] Furthermore, the cross-sectional area s of the withdrawal plate lead The relationship between the current and the battery capacity C is 2≦C / s lead ≦15. Therefore, it can be further ensured that the withdrawn plate has sufficient current-carrying capacity. The inventors have found that the smaller the ratio of the capacity C of the battery to the cross-sectional area s of the withdrawn plate, the better it is. If the ratio is too small, the size of the withdrawn plate will be excessively large, resulting in a redundant design that may occupy too much of the internal space of the battery.

[0069] In some embodiments of the disclosure, as shown in Figures 13 and 14, the pull-out plates include a positive pull-out plate 141 and a negative pull-out plate 142. The conductive posts include a positive conductive post 131 and a negative conductive post 132. The positive conductive post 131 passes through the battery housing 110 and is connected to the positive pull-out plate 141. The negative conductive post 132 passes through the battery housing 110 and is connected to the negative pull-out plate 142. The positive pull-out plate 141 is connected to the positive tab of the electrode core 120, and the negative pull-out plate 142 is connected to the negative tab of the electrode core 120.

[0070] Cross-sectional area s of the positive electrode extraction plate 141 positive lead The relationship between the current and the battery capacity C is 5≦C / s positive lead ≦12, and the cross-sectional area s of the negative electrode extraction plate 142 negative lead The relationship between the current and the battery capacity C is 6≦C / s negative lead≦15. The positive electrode lead plate 141 may be an aluminum sheet, and the negative electrode lead plate 142 may be a copper sheet. When the cross-sectional areas are the same, the current carrying capacity of the aluminum sheet is smaller than that of the copper sheet. Therefore, when the positive electrode lead plate 141 and the negative electrode lead plate 142 have the same current carrying capacity, the cross section of the copper sheet may be made smaller.

[0071] In some embodiments of the present disclosure, the cross-sectional area of ​​the positive electrode extraction plate 141 is 14 mm 2 From 150mm 2 The cross-sectional area of ​​the negative electrode extraction plate 142 is in the range of 10 mm 2 From 130mm 2 and the battery capacity C ranges from 30 Ah to 400 Ah.

[0072] The following describes the comparative example (i.e., related art) 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 example and embodiments 1 to 8 are respectively fast-charged at a rate of 2C, and the temperature rise curves of the positive electrode pull-out plate 141 and the negative electrode pull-out plate 142 are recorded. The cross-sectional area s positive lead , the cross-sectional area s of the negative electrode extraction plate 142 negative lead, and the total capacity C of the battery are selected from the data in Table 2 below. FIG. 29 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 1. FIG. 30 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 2. FIG. 31 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 3. FIG. 32 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 4. FIG. 33 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 5. FIG. 34 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 6. FIG. 35 is a temperature rise curve diagram of the positive electrode pull plate 141 and the negative electrode pull plate 142 in the comparative example and embodiment 7. FIG. 36 is a temperature rise curve diagram of the positive electrode extraction plate 141 and the negative electrode extraction plate 142 in the comparative example and the eighth embodiment.

[0073] [Table 2]

[0074] Compared with the comparative examples, in the first to eighth embodiments, the temperature rise of the positive electrode pull plate 141 and the negative electrode pull plate 142 is low, ensuring that the battery is in a good operating condition.

[0075] 13 and 14, the positive electrode extraction plate 141 and the negative electrode extraction plate 142 have the same structure, and each includes a first connection sheet and a second connection sheet connected to each other. The second connection sheet of the positive electrode extraction 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 connection sheet of the positive electrode extraction plate 141 is directly opposite the first plate piece 111 and is connected to the positive electrode conductive post 131, the second connection sheet of the negative electrode extraction 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 connection sheet of the negative electrode extraction 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 extraction plate 141 may be referred to as the first positive electrode connection sheet 141a, and the second connection sheet of the positive electrode extraction plate 141 may be referred to as the second positive electrode connection sheet 141b. Similarly, the first connection sheet of the negative electrode extraction plate 142 may be referred to as the first negative electrode connection sheet 142a, and the second connection sheet of the negative electrode extraction plate 142 may be referred to as the second negative electrode connection sheet 142b.

[0076] In some embodiments of the present disclosure, the size of both the first positive electrode connection sheet 141a and the first negative electrode connection sheet 142a ranges from 0.8 mm to 2 mm in the length direction of the battery housing.

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

[0078] A first insulating spacer 161 is disposed between the positive electrode pull-out plate 141 and the first plate piece 111, and the positive electrode conductive post 131 is connected to the positive electrode pull-out plate 141 through the first insulating spacer 161. A second insulating spacer 162 is disposed between the negative electrode pull-out plate 142 and the second plate piece 112, and the negative electrode conductive post 132 is connected to the negative electrode pull-out plate 142 through the second insulating spacer 162. This can avoid direct contact between the positive electrode pull-out plate 141 and the negative electrode pull-out plate 142 and the battery housing 110, and improve the overall safety performance of the battery 100.

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

[0080] 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 end and outer end of the first support piece 161a abut against the end of 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 pull-out plate 141 and is disposed between the positive electrode pull-out 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 of the battery 100, respectively, and the second insulating piece is aligned with the negative electrode pull-out plate 142 and positioned between the negative electrode pull-out plate 142 and the battery housing 110.

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

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

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

[0084] The positive electrode extraction plate 141 and the first insulating piece may each be configured as an "L" shaped structure, the positive electrode extraction plate 141 may be disposed inside the first insulating piece, and the two are bonded together. The negative electrode extraction plate 142 and the second insulating piece may also each be configured as an "L" shaped structure, the negative electrode extraction plate 142 may be disposed inside the second insulating spacer piece, and the two are bonded together.

[0085] In some embodiments of the present disclosure, the size of the first insulating strip vertical plate 161b and the first positive electrode connection sheet 141a each ranges from 0.3 mm to 1.5 mm in the length direction of the battery housing 110. That is, the thickness of the first insulating strip vertical plate 161b and the thickness of the first positive electrode connection sheet 141a each ranges from 0.3 mm to 1.5 mm.

[0086] This can ensure that the positive electrode pull plate 141 and the negative electrode pull plate 142 are insulated from the battery housing 110 and minimize the space occupied in the length direction of the battery housing 110; if the thickness is less than 0.3 mm, the welding heat may melt the spacer when the tab and the pull plate are welded, resulting in insufficient insulation; if the thickness is more than 1.5 mm, the space of the electrode core 120 will be excessively occupied, resulting in a decrease in space utilization rate and an impact on the design capacity of the battery 100.

[0087] The battery 100 in the embodiment of the present disclosure further includes a sealing ring. The sealing ring is hermetically connected between the conductive post and the battery housing 110, the sealing ring is configured as an elastic member, and the sealing ring is an insulating member, so that the extraction plate can be effectively insulated from the battery housing 110. The initial size of the sealing ring in the axial direction of the sealing ring is d1, and the size of the sealing ring after compression in the axial direction of the sealing ring is d2, where 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 the conductive post and sandwiched between the inner wall of the battery housing 110 and the extraction plate. It should be noted that the initial size d1 of the sealing ring in the axial direction of the sealing ring may be understood as the axial size of the sealing ring that elastically returns after decompression (d1 is the distance between the two axially opposing end faces of the sealing ring after the sealing ring returns). When the sealing ring is sandwiched between the inner wall of the battery housing and the extraction plate, d2 may be understood as the distance between the two opposing faces of the sealing ring along the axial direction of the sealing ring. One of the two faces is the face where the sealing ring contacts the inner wall of the battery housing, and the other face is the face where the sealing ring contacts the extraction plate.

[0089] The initial axial size of the sealing ring is the axial size of the sealing ring when the sealing ring is not compressed. After the sealing ring is compressed, the size of the sealing ring decreases in the axial direction. However, the ratio between the size of the compressed sealing ring and the initial size is limited. This can ensure that the sealing ring has a compression amount, facilitate the installation of the spacer to the drawing plate and the conductive post, and can also ensure the sealing performance between the drawing plate and the battery housing 110, and the sealing performance between the conductive post and the sealing ring. In addition, the capacity of the battery is improved without changing the size of the battery.

[0090] After the sealing ring is compressed, the axial size of the sealing ring decreases. Therefore, the radial size of the sealing ring necessarily increases, and the two axial sides of the sealing ring are respectively configured as rings, the axial outer end of the sealing ring contacts the inner wall of the battery housing 110, and the axial inner end of the sealing ring contacts the pull-out plate. Therefore, both axial ends of the sealing ring are sandwiched between the battery housing 110 and the pull-out plate.

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

[0092] In another embodiment of the present disclosure, as shown in Figures 19 and 20, a sealing ring is fitted onto the conductive post, a flange is further disposed on the outer circumferential surface of the conductive post, the flange is connected to the extraction plate, and at least a portion of the sealing ring is sandwiched between the flange and the inner wall of the battery housing. It should be noted that when the sealing ring is sandwiched between the inner wall of the battery housing and the flange, d2 may be understood as the distance between two opposing surfaces of the sealing ring along the axial direction of the sealing ring. One surface 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 abut against the extraction plate, but abuts against 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, a portion of the first sealing ring 151 extends into the via 102 of the first plate piece 111, and another portion of the first sealing ring 151 is 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, a portion of the second sealing ring 152 extends into the via 102 of the second plate piece 112, and another portion of the second sealing ring 152 is 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 disposed between the draw 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 draw plate and the inner end of the sealing ring abutting the draw 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 the via on the battery housing 110 through which the conductive post passes. Alternatively, the sealing ring may not enter the via, so that the sealing ring can ensure that the conductive post does not move radially of the via and avoid contact with the inner circumferential surface of the via.

[0095] Specifically, to limit movement of the sealing ring and the conductive post in the radial direction of the via, a portion of the inner end of the sealing ring may be aligned with a step piece of the spacer, and another portion of the inner end of the sealing ring may abut against the extraction plate.

[0096] In some embodiments of the present 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 pull-out plate and disposed between the pull-out plate and the battery housing 110.

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

[0098] In some embodiments of the present disclosure, the battery housing 110 is constructed as an aluminum alloy piece, and the thickness of the lower housing and the thickness of the sixth plate piece 116 range 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 thickness of the sixth plate piece 116 need to be set thicker to ensure the structural strength of the battery housing 110.

[0099] In some other embodiments of the present disclosure, the battery housing 110 is constructed as a stainless steel or nickel-plated steel strip, and the thickness of the lower housing and the sixth plate piece 116 ranges from 0.05 mm to 0.2 mm. Because the stainless steel or nickel-plated steel strip has high hardness, the thickness of the lower housing and the sixth plate piece 116 may be set 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 thickness of the lower housing is the thickness of any one 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 FIG. 16 to FIG. 18, a positive electrode drawn plate 141 and a negative electrode drawn plate 142 are arranged in the battery housing 110, and the positive electrode drawn plate 141 and the negative electrode drawn plate 142 are connected to the positive electrode tab and the negative electrode tab of the electrode core 120, respectively. The positive electrode drawn plate 141 includes a first positive electrode connection sheet 141a, and the negative electrode drawn 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 length 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 length direction of the battery housing 110 is L1, and the size of the battery 100 in the length direction of the battery housing 110 is L. L1 and L satisfy 0.95≦L1 / L≦0.99. It may be understood that the first positive electrode connection sheet 141a has a first surface facing the first negative electrode connection sheet 142a, 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 length direction of the battery housing 110 is L1. The battery housing 110 has a first surface and a second surface facing each other in the length direction, and the distance between the first surface and the second surface of the battery housing 110 in the length direction of the battery housing 110 is L. It should be noted that the length direction of the battery housing 110 coincides with the length direction of the battery 100.

[0102] In some embodiments, the positive electrode extraction plate 141 includes a second positive electrode connection sheet 141b and a first positive electrode connection sheet 141a that are connected together. The negative electrode extraction plate 142 includes a second negative electrode connection sheet 142b and a first negative electrode connection sheet 142a that are connected together. Therefore, in this disclosure, "L1" 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 length 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 pull plate 141 and the negative electrode pull plate 142 have sufficient conductive performance, and do not occupy too much of the internal space of the battery housing 110, especially not occupy too much of the space of the battery housing 110 in the length direction.

[0104] In some embodiments of the present disclosure, the thickness of the first positive electrode connection sheet 141a ranges from 0.6 mm to 2 mm, and the thickness of the first negative electrode connection sheet 142a ranges from 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 length 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 length direction of the battery housing.

[0105] The positive electrode drawn plate 141 may be configured as an "L"-shaped and may be an integrally formed member, and the negative electrode drawn plate 142 may be configured as an "L"-shaped and may be an integrally formed member. The thickness of the positive electrode drawn plate 141 may be the thickness of the first positive electrode connection sheet 141a, and the thickness of the negative electrode drawn 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 thickness of the first negative electrode connection sheet 142a affect the degree of space occupied by the positive electrode drawn plate 141 and the negative electrode drawn plate 142 in the length direction of the battery housing 110. Therefore, the thickness of the positive electrode drawn plate 141 is limited to 0.6 mm to 2 mm, and the thickness of the negative electrode drawn plate 142 is limited to 0.6 mm to 2 mm. The positive electrode pull-out plate 141 and the negative electrode pull-out plate 142 may not occupy excessively the internal space of the battery housing 110, especially in the length direction, so as to occupy less space of the battery housing 110. Therefore, the capacity of the battery is improved without changing the size of the battery. The positive electrode conductive post 131 is disposed on the first plate piece 111, and the negative electrode conductive post 132 is disposed 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 is connected to the positive electrode conductive post 131, the first negative electrode connection sheet 142a is parallel to the second plate piece 112 and is 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 pull-out 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 led out from the first end face. The negative electrode tab of the electrode core 120 is led 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 length direction of the battery housing 110 ranges from 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 length direction of the battery housing 110 ranges from 2 mm to 12 mm.

[0108] The battery housing 110 further includes a third plate piece 113 and a fourth plate piece 114 facing each other in the width direction. The distance between the inner surface of the third plate piece 113 and the inner surface of 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 can provide sufficient strength to the battery housing 110, and the capacity of the battery 100 is not affected by the large thickness of the third plate piece 113 and the fourth plate piece 114 making the space in the battery housing 110 small. It should be noted that the width direction of the battery housing 110 is consistent with the width direction of the battery 100.

[0109] In some embodiments of the present disclosure, the battery housing 110 further includes a fifth plate piece 115 and a sixth plate piece 116 facing each other in the thickness direction. The distance between the inner surface of the fifth plate piece 115 and the inner surface of the sixth plate piece 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 thickness of the fifth plate piece 115 and the sixth plate piece 116 is not excessively large, so that when the volume of the battery housing 110 is fixed, the fifth plate piece 115 and the sixth plate piece 116 do not occupy excessively the internal space of the battery housing 110. In addition, the fifth plate piece 115 and the sixth plate piece 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 disposed 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, and both the second positive electrode connection sheet 141b and the second negative electrode connection sheet 142b are 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 embodiment of the present 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 accommodation space for accommodating the electrode core 120.

[0112] According to some embodiments of the present disclosure, the lower housing includes a first plate piece 111 and a second plate piece 112, where the first plate piece 111 and the second plate piece 112 face each other in the length direction of the battery 100; a third plate piece 113 and a fourth plate piece 114, where the third plate piece 113 and the fourth plate piece 114 face each other in the width direction of the battery 100; and a third plate piece 113 and a fourth plate piece 114, where the third plate piece 113 and the fourth plate piece 114 face each other in the width direction of the battery 100. The battery 100 further includes a third plate piece 113 and a fourth plate piece 114, each of which is separately connected to one end of the first plate piece 111 and the second plate piece 112 on the same side in the width direction of the battery 100, and a fourth plate piece 114, each of which is separately connected to the other end of the first plate piece 111 and the second plate piece 112 on the same side in the width direction of the battery 100, and a fifth plate piece 115, each of which has an outer periphery connected to one end of the first plate piece 111, the second plate piece 112, the third plate piece 113, and the fourth plate piece 114 on the same side 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 are configured as a peripheral side wall of the lower housing. Therefore, the opening of the lower housing is very large, so that the electrode core 120 can be conveniently installed in the battery housing 110, and the installation efficiency of the battery 100 is improved.

[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 stamping. Therefore, the molding efficiency of the lower housing is greatly improved, and the structural strength of the lower housing is also enhanced. 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] A battery according to the present disclosure includes a battery housing 110, an electrode core 120, a pull-out piece, and a spacer.

[0115] 1 to 15, there is an accommodation space within the battery housing 110, and the electrode core 120 and the pull-out plate are disposed within the battery housing 110, with the pull-out plate being connected to a tab of the electrode core 120. A portion of the spacer is sandwiched between the pull-out plate and the battery housing 110, and another portion of the spacer is sandwiched between an end of the electrode core 120 and the battery housing 110.

[0116] In other words, the spacer of the present disclosure not only separates the extraction plate from the battery housing 110 to avoid the short circuit phenomenon caused by the contact between the extraction plate and the battery housing 110, but also may abut both ends of the electrode core 120 to avoid the movement of the electrode core 120 in the direction of the battery housing 110 and improve the stability of the electrode core. Therefore, it is ensured that the tabs disposed on the electrode core 120 do not move, and the connection stability between the tabs and the extraction plate is improved.

[0117] In some embodiments of the present 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 withdrawal plate and sandwiched between the withdrawal plate and the battery housing 110. In practice, not only is the insulating piece an insulating piece, but the support piece is also an insulating member. The support piece and the insulating piece may each be an integrally formed member.

[0118] Both ends of the support piece may abut against 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 extraction plate. In addition, the insulating piece may be further spaced apart between the extraction plate and the battery housing 110 to avoid the leakage current phenomenon caused by direct contact between the extraction plate and the battery housing 110.

[0119] Further, the pull-out plate may be configured as an "L" shape, including 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 length 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 as 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, the insulating piece vertical plate is disposed between the first connecting sheet and the side plate of the battery housing 110 in the length direction, and the insulating piece horizontal plate is disposed between the second connecting sheet and the side plate of the battery housing 110 in the thickness direction.

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

[0122] It can be appreciated that to avoid direct contact with the battery housing 110, the L-shaped pull-out plate may be positioned inside the L-shaped insulating piece so that the insulating piece can encase the entire pull-out plate.

[0123] Furthermore, the outer surface of the support piece is flush with the outer surface of the insulating piece vertical plate, and the inner surface of the support piece is flush with the inner end of the insulating piece horizontal plate. In other words, the size of the support piece protruding inward from the insulating piece vertical plate is the size of the insulating piece horizontal plate in the length direction. When the second connection sheet on the insulating piece horizontal plate is overlapped and connected to the tab of the electrode core 120, the support piece abuts against the end of the electrode core 120 in the length direction.

[0124] In some embodiments of the present disclosure, the insulating strip vertical plate is provided with an electrolyte-immersed through hole 101 and a via through which a conductive post penetrates. The conductive post is connected to the first connection sheet through the via of the insulating strip. Providing the electrolyte-immersed through hole 101 in the insulating strip may facilitate the injection of electrolyte into the battery housing 110. In addition, gas in the battery housing 110 may be discharged through the electrolyte-immersed through hole 101. The electrolyte-immersed 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 length direction of the battery housing 110.

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

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

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

[0128] The electrode core 120 is placed directly in the lower housing, and then the tab is 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 tab. After the electrode core 120 is integrally assembled in the housing, the tab may be necessarily straightened and the lead plate may be overlapped. Then, the tab may be welded together with the lead plate to avoid the risk of contact of the positive or negative electrode by the curved tab, reduce the size of the tab, increase the utilization rate of the metal current collector, improve the process yield, and reduce the product cost.

[0129] The upper housing (sixth plate piece 116) is assembled after the tabs of the electrode core 120 are welded to the lead plate of the lower housing. After the upper and lower housings are assembled, the upper and lower housings are sealed and connected 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 the liquid injection is completed, the liquid injection hole needs to be sealed, and the sealing method is metal plate welding or rubber plug sealing. The explosion-proof valve of the battery 100 is disposed on the first plate piece 111 or the second plate piece 112, and one or more explosion-proof valves may be disposed on the first plate piece 111 or the second plate piece 112.

[0131] The explosion-proof valve is formed by laser marking or stamping directly 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 stamped on the battery housing 110, and the explosion-proof valve is then welded to the battery housing 110.

[0132] According to some embodiments of the present disclosure, the extraction plate is configured as an "L" shape. The second connection sheet is connected to one side of the first connection sheet and extends toward the inside of the housing, and the second connection sheet extending toward the inside of the housing may be welded and fixed with a plurality of tabs, so that the plurality of tabs are not excessively curved and the tabs are flatter during and after welding.

[0133] In another embodiment of the present disclosure, the pull-out plate is configured as a "T" shape, and the second connection sheet is connected to the middle region of the first connection sheet and extends toward the inside of the battery housing 110. Since the "T"-shaped pull-out plate still has the second connection sheet extending toward the inside of the housing, the tabs can still be evenly welded to the second connection sheet, and the tabs do not bend excessively, greatly improving the connection stability between the tabs and the pull-out plate. A portion of the multiple tabs may be welded to one side of the second connection sheet in the thickness direction, and another portion of the multiple tabs may be welded to the other side of the second connection 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 posts 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 conductive post 131 and a negative conductive post 132. The lead plates include a positive lead plate 141 and a negative lead plate 142. The positive conductive post 131 passes through the first plate piece 111 and is connected to a first connection sheet of the positive lead plate 141, and the negative conductive post 132 passes through the second plate piece 112 and is connected to a first connection sheet of the negative lead plate 142. In addition, the second connection sheet is parallel to the fifth plate piece 115 or the sixth plate piece 116.

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

[0137] The spacer is disposed between the drawer plate and the battery housing 110, and the conductive post is connected to the drawer plate through the spacer. The spacer may avoid direct contact between the drawer plate and the battery housing 110 to avoid the risk of the battery housing 110 being charged, and improve the safety performance of the battery 100.

[0138] In some embodiments of the present 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 withdrawal plate and sandwiched between the withdrawal plate and the battery housing 110. In practice, not only is the insulating piece an insulating piece, but the support piece is also an insulating member. The support piece and the insulating piece may each be an integrally formed member.

[0139] The insulating piece is also configured as 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, the insulating piece vertical plate is disposed between the first connecting sheet and the side plate of the battery housing 110 in the length direction, and the insulating piece horizontal plate is disposed between the second connecting sheet and the side plate of the battery housing 110 in the thickness direction.

[0140] The following is a brief description of a battery pack according to an embodiment of the present disclosure.

[0141] 37, a battery pack 1000 according to an embodiment of the present disclosure includes the aforementioned battery 100. Because the battery 100 is disposed in the battery pack 1000 according to an embodiment of the present disclosure, the safety performance of the battery pack 1000 is stronger, and the power of the battery pack 1000 is further improved.

[0142] The following is a brief description of a vehicle 10000 according to an embodiment of the present disclosure.

[0143] 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 disposed on the vehicle 10000 according to the embodiment of the present disclosure, the driving range of the vehicle 10000 is significantly improved, and the electrical safety performance of the vehicle 10000 is also significantly improved.

[0144] In addition, as shown in Fig. 39, in another embodiment of the present disclosure, a vehicle 10000 includes the above-mentioned battery 100. With the battery 100 in the above-mentioned embodiment configured, the mileage of the vehicle 10000 can be improved, and the electrical safety performance of the vehicle 10000 is also greatly improved.

[0145] In the description herein, a description using the reference terms "embodiments," "some embodiments," "exemplary embodiments," "one example," "particular example," or "some examples" means that the particular features, structures, materials, or characteristics described with reference to the embodiments or examples are included in at least one embodiment or example of the disclosure. In this specification, exemplary descriptions of the aforementioned terms do not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more of the embodiments or examples.

[0146] Although embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and objectives of the present disclosure, the scope of the present disclosure being defined by the appended claims and their equivalents. [Explanation of symbols]

[0147] 10000 vehicles 1000 Battery Packs 100 batteries 110 Battery housing 111 First Plank 112 Second board 113 Third Plank 114 Fourth Plank 115 Fifth Plank 116 Sixth Plank 120 Electrode Core 131 Positive conductive post 131a first positive conductive post 131b second positive conductive post 131c first connecting member 131d First insulating plate 131e Positive conductive post flange edge 132 Negative conductive post 132a first negative conductive post 132b second negative conductive post 132c second connecting member 132d Second insulating plate 132e Negative Conductive Post Flange 141 Positive electrode extraction plate 141a First positive electrode connection sheet 141b Second positive electrode connection sheet 142 Negative electrode extraction 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 strip vertical plate 161c First insulating piece horizontal plate 162 Second insulating spacer 162a Second support piece 162b Second insulating strip vertical plate 162c Second insulating piece horizontal plate 101 Electrolyte immersion through hole 102 Via

Claims

1. A battery housing (110); An electrode core (120), an extraction plate, and a conductive post. wherein the electrode core (120) and the extraction plate are all disposed within the battery housing (110), the extraction plate is connected to the electrode core (120), the conductive post penetrates the battery housing (110) such that the conductive post is connected to the extraction plate, and the cross-sectional area s ｌｅａｄ and the capacity C of the battery (100) is expressed as C / s ｌｅａｄ ≦15, s ｌｅａｄ The unit is mm ２ and C is in Ah, battery (100).

2. The cross-sectional area s of the extraction plate ｌｅａｄ and the capacity C of the battery (100) is such that 2≦C / s ｌｅａｄ ≦15. The battery (100) of claim 1 .

3. The extraction plates include a positive electrode extraction plate (141) and a negative electrode extraction plate (142), the conductive posts include a positive electrode conductive post (131) and a negative electrode conductive post (132), the positive electrode extraction plate (141) is connected to the positive electrode conductive post (131) through the battery housing (110), and the negative electrode extraction plate (142) is connected to the negative electrode conductive post (132) through the battery housing (110); The cross-sectional area s of the positive electrode extraction plate (141) ｐｏｓｉｔｉｖｅ ｌｅａｄ and the capacity C of the battery (100) is 5≦C / s ｐｏｓｉｔｉｖｅ ｌｅａｄ ≦12, and the cross-sectional area s of the negative electrode extraction plate (142) ｎｅｇａｔｉｖｅ ｌｅａｄ and the capacity C of the battery (100) is such that 6≦C / s ｎｅｇａｔｉｖｅ ｌｅａｄ ≦15, the cross section of the positive electrode lead plate (141) and the cross section of the negative electrode lead plate (142) are planes perpendicular to the direction of current flow, and s ｐｏｓｉｔｉｖｅ ｌｅａｄ and s ｎｅｇａｔｉｖｅ ｌｅａｄ The unit is mm ２ and C is in Ah.

4. The cross-sectional area of ​​the positive electrode extraction plate (141) is 14 mm ２ From 150 mm ２ and the cross-sectional area of ​​the negative electrode extraction plate (142) is in the range of 10 mm ２ From 130 mm ２ 4. The battery (100) of claim 3, wherein the capacity C of the battery (100) ranges from 30 Ah to 400 Ah.

5. 5. The battery (100) of claim 3 or 4, wherein the positive electrode lead plate (141) is an aluminum sheet and the negative electrode lead plate (142) is a copper sheet.

6. 6. The battery (100) of claim 3, wherein the positive electrode lead plate (141) and the negative electrode lead plate (142) each have a first connection sheet and a second connection sheet connected together, the second connection sheet of the positive electrode lead plate (141) being connected to a 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 a 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).

7. 7. The battery (100) of claim 6, wherein the size of the first connecting sheet in the length direction of the battery (100) ranges from 0.8 mm to 2 mm.

8. 8. The battery (100) of claim 7, wherein the size of the first connecting sheet in the length direction of the battery (100) ranges from 0.6 mm to 2 mm.

9. 9. The battery (100) of claim 6, wherein the battery housing (110) comprises a first plate piece (111) and a second plate piece (112) opposed to each other in the longitudinal direction of the battery (100), and the first connection sheet of the positive electrode lead plate (141) and the first connection sheet of the negative electrode lead plate (142) are parallel to the first plate piece (111) and the second plate piece (112), respectively.

10. The battery (100) of claim 9, further comprising a third plate piece (113) and a fourth plate piece (114) opposed to each other in the width direction of the battery (100), and a fifth plate piece (115) and a sixth plate piece (116) opposed to each other in the thickness direction of the battery (100), and the second connection sheet of the positive electrode lead plate (141) and the second connection sheet of the negative electrode lead plate (142) are parallel to the fifth plate piece (115) and the sixth plate piece (116), respectively.

11. 11. The battery (100) of claim 10, 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 having an open side, and the sixth plate piece (116) is fixedly connected to the lower housing so as to close the open end of the lower housing.

12. 12. The battery (100) of claim 9, further comprising a first insulating spacer (161) disposed within the battery housing (110), at least a portion of the first insulating spacer (161) being located between the positive electrode lead plate (141) and the first plate piece (111), and the positive electrode conductive post (131) being connected to the positive electrode lead plate (141) through the first insulating spacer (161).

13. 13. The battery (100) of any one of claims 9 to 12, further comprising a second insulating spacer (162) disposed within the battery housing (110), at least a portion of the second insulating spacer (162) being located between the negative electrode lead plate (142) and the second plate piece (112), and the negative electrode conductive post (132) being connected to the negative electrode lead plate (142) through the second insulating spacer (162).

14. The relationship between the cross-sectional area s1 of the positive 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 conductive post (132) and the capacity C of the battery (100) is 6 / 5≦C / s2≦8, and both s1 and s2 are in mm ２ 14. The battery (100) of any one of claims 3 to 13, wherein:

15. The cross-sectional area s1 of the positive conductive post (131) and the cross-sectional area s2 of the negative conductive post (132) are 12 mm ２ From 315 mm ２ 15. The battery (100) of claim 14, wherein the capacity C of the battery (100) ranges from 30 Ah to 400 Ah.

16. 4. The battery (100) of claim 3, wherein the positive conductive post (131) is an aluminum post and the negative conductive post (132) is a copper post.

17. A battery pack (1000) comprising the battery (100) according to any one of claims 1 to 16.

18. A vehicle (10000) comprising the battery (100) according to any one of claims 1 to 16 or the battery pack (1000) according to claim 17.

Images