Bipolar battery and bipolar battery stack
A technology for bipolar batteries and battery packs, applied in the direction of large flat batteries/batteries, battery pack components, batteries, etc., to achieve the effect of suppressing thermal degradation
Pending Publication Date: 2021-08-27
TOYOTA JIDOSHA KK
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- Description
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- Application Information
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Problems solved by technology
Therefore, it is considered that the above-mentioned thermal deterioration is likely to occur in the vicinity of the outermost current collector connected to the tab with a large heat generation.
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[0052] 1. Bipolar battery
[0053] exist figure 1 as well as figure 2 The structure of the bipolar battery 100 is schematically shown in . The bipolar battery 100 includes a first member 10 , a second member 20 , and a laminated electrode body 30 arranged between the first member 10 and the second member 20 . The laminated electrode body 30 includes: a first current collector 31 constituting one end surface in the lamination direction; a second current collector 32 constituting the other end surface in the lamination direction; and disposed between the first current collector 31 and the second current collector 32 at least one bipolar current collector 33 ; and a plurality of power generating elements 34 electrically connected in series between the first current collector 31 and the second current collector 32 via the bipolar current collector 33 . The first current collector 31 is arranged between the first member 10 and the bipolar current collector 33 . The second curr...
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Abstract
Disclosed is a bipolar battery and a bipolar battery stack. The thermal deterioration of the electrode body due to the generation of heat of tabs can be suppressed. The bipolar battery of the present disclosure includes a first member, a second member, and a laminate electrode body arranged therebetween, wherein the laminate electrode body includes a first current collector constituting a lamination direction end surface, a second current collector constituting the other lamination direction end surface, at least one bipolar current collector arranged between the first current collector and the second current collector, and a plurality of power generating elements which are electrically connected in series via the bipolar current collector between the first current collector and the second current collector, the first current collector is arranged between the first member and the bipolar current collector, the second current collector is arranged between the second member and the bipolar current collector, the first current collector has a first tab, the second current collector has a second tab, an amount of heat generated by the first tab during energization of the battery is greater than an amount of heat generated by the second tab, the first member is a cooling member for cooling the first current collector, and a cooling performance of the first member is greater than a cooling performance of the second member.
Description
technical field [0001] The present application discloses a bipolar battery and a bipolar battery pack. Background technique [0002] Patent Document 1 discloses a bipolar battery in which a plurality of bipolar electrodes having a positive electrode formed on one surface of a current collector and a negative electrode formed on the other surface are stacked in series via an electrolyte layer. In Patent Document 1, outermost current collectors are provided at one end and the other end of the stacking direction of a plurality of bipolar electrodes, and tabs (leads) are respectively connected to the outermost current collectors. [0003] Patent Document 2 discloses a battery pack in which a cooling member is provided between cells. In addition, Patent Document 3 discloses a battery cooling system in which an electrode block is arranged between electrode tabs of a battery, a cooling member is brought into contact with the electrode block, and the electrode tabs are cooled via t...
Claims
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IPC IPC(8): H01M10/04H01M10/613H01M10/654H01M10/6553
CPCH01M10/0418H01M10/613H01M10/654H01M10/6553H01M50/562H01M10/6554H01M10/044H01M50/581Y02P70/50Y02E60/10H01M2200/10H01M10/655H01M10/658H01M50/583H01M50/578H01M50/574H01M50/54
Inventor 内海慎太郎野本和诚
Owner TOYOTA JIDOSHA KK