CN209592267U - A lithium-ion battery with internal heating - Google Patents
A lithium-ion battery with internal heating Download PDFInfo
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- CN209592267U CN209592267U CN201920075786.1U CN201920075786U CN209592267U CN 209592267 U CN209592267 U CN 209592267U CN 201920075786 U CN201920075786 U CN 201920075786U CN 209592267 U CN209592267 U CN 209592267U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 84
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 42
- 239000007787 solid Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 42
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 239000002356 single layer Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
本实用新型属于锂离子电池加热领域，具体涉及一种带内部加热装置的锂离子电池，其特征在于：电池内部设置有电芯，电芯上端设置有第一电芯极耳、第二电芯极耳，第一电芯极耳、第二电芯极耳分别与电芯相连，电芯内部设置有产热装置，产热装置包括第一层加热片，第一层加热片分别与延伸出电芯外的第一层加热片第一极耳、第一层加热片第二极耳相连，控制开关由第一控制开关和第二控制开关组成；外部装置和第二控制开关组成第一支路，第一电芯极耳、电芯和第二电芯极耳组成第二支路，第一层加热片第一极耳、第一层加热片、第一层加热片第二极耳、第一控制开关组成第三支路。本实用新型充电快、安全性高、能够提高低温下电池工作性能。
The utility model belongs to the field of lithium ion battery heating, and in particular relates to a lithium ion battery with an internal heating device. Tabs, the tabs of the first cell and the tabs of the second cell are respectively connected to the cell, and a heat generating device is arranged inside the cell, and the heat generating device includes a first layer of heating sheet, which is respectively connected to the extending The first pole of the first layer of heating sheet outside the cell is connected to the second pole of the first layer of heating sheet, and the control switch is composed of the first control switch and the second control switch; the external device and the second control switch form the first branch The first cell tab, the cell and the second cell tab form the second branch circuit, the first tab of the first layer of heating sheet, the first layer of heating sheet, the second tab of the first layer of heating sheet, The first control switch forms the third branch. The utility model has the advantages of fast charging and high safety, and can improve the working performance of the battery at low temperature.
Description
技术领域technical field
本实用新型属于锂离子电池加热领域，具体涉及一种带内部加热装置的锂离子电池。The utility model belongs to the field of lithium ion battery heating, in particular to a lithium ion battery with an internal heating device.
背景技术Background technique
锂离子电池包括液态、半固态和固态锂离子电池。绝大多数锂离子电池由于低温环境下的SEI膜、表面电荷传递阻抗和锂离子在电极中的扩散差等原因，导致锂离子电池大电流充放电能力弱，因此倍率和功率性能受限。Lithium-ion batteries include liquid, semi-solid and solid-state lithium-ion batteries. Due to the SEI film in the low temperature environment, the surface charge transfer resistance and the poor diffusion of lithium ions in the electrode, most lithium-ion batteries have weak high-current charge and discharge capabilities, so the rate and power performance are limited.
因此，采用辅助手段提高电池的低温性能成为重要的研究方向，已提出的有交流电加热法、帕尔贴加热法、加热板加热法、流体加热和加热套加热法等。然而这些加热方式，如中国专利(一种锂离子电池自加热装置及方法,CN104282965A)，需额外配备电源给加热丝供电，且加热时间10min左右，升温速度非常慢。另外，这些加热方法的能耗较大，平均在20％左右，也同样限制了锂离子电池的推广使用。Therefore, using auxiliary means to improve the low-temperature performance of batteries has become an important research direction. Alternating current heating methods, Peltier heating methods, heating plate heating methods, fluid heating methods, and heating mantle heating methods have been proposed. However, these heating methods, such as the Chinese patent (a lithium-ion battery self-heating device and method, CN104282965A), need an additional power supply to supply power to the heating wire, and the heating time is about 10 minutes, and the heating rate is very slow. In addition, the energy consumption of these heating methods is large, about 20% on average, which also limits the popularization and use of lithium-ion batteries.
同时，如何动态检测锂离子电池内部温度也是一个重要的使用难题，这是关系到锂离子电池安全控制的一个重要参数。目前的研究相对成熟，但是检测装置成本较高，并不利于大范围使用。At the same time, how to dynamically detect the internal temperature of the lithium-ion battery is also an important problem in use, which is an important parameter related to the safety control of the lithium-ion battery. The current research is relatively mature, but the cost of the detection device is high, which is not conducive to large-scale use.
因此，有必要开发一种同时具有利用电池电芯内部供电和外部电源供电功能，且当需要低温工作时(例如充电或放电)，在很短的时间内(<5min)，电池的温度以可控的手段快速升高，从而表现出正常的电性能的电路。本实用新型就是提供一种这样的锂离子电池的电路。Therefore, it is necessary to develop a battery that uses both the internal power supply of the battery cell and the external power supply function, and when low temperature operation is required (such as charging or discharging), the temperature of the battery can be reduced within a short period of time (<5min). Controlling means rapid rise, thus exhibiting normal electrical performance of the circuit. The utility model provides a circuit of such a lithium ion battery.
实用新型内容Utility model content
为了解决上述技术问题，本实用新型提供一种充电快、安全性高、能够提高低温下电池工作性能的带内部加热装置的离子电池。In order to solve the above technical problems, the utility model provides an ion battery with an internal heating device which has fast charging, high safety and can improve the working performance of the battery at low temperature.
本实用新型的技术方案为：The technical scheme of the utility model is:
一种带内部加热装置的锂离子电池，电池内部设置有电芯(1)，电芯(1)上端设置有第一电芯极耳(11)、第二电芯极耳(12)，第一电芯极耳(11)、第二电芯极耳(12)分别与电芯(1)相连，电芯(1)内部设置有产热装置(2)，产热装置(2)包括第一层加热片(2-1)，第一层加热片(2-1)分别与延伸出电芯外的第一层加热片第一极耳(21)、第一层加热片第二极耳(22)相连，控制开关(5)由第一控制开关(51)和第二控制开关(52)组成；外部装置和第二控制开关(52)组成第一支路，第一电芯极耳(11)、电芯(1)和第二电芯极耳(12)组成第二支路，第一层加热片第一极耳(21)、第一层加热片(2-1)、第一层加热片第二极耳(22)、第一控制开关(51)组成第三支路；第二支路能够分别与第一支路、第三支路串联，或第二支路与第三支路并联后和第一支路串联A lithium-ion battery with an internal heating device, the battery is provided with a cell (1), the upper end of the cell (1) is provided with a first cell tab (11), a second cell tab (12), and a second cell tab (12). A battery tab (11) and a second battery tab (12) are respectively connected to the battery cell (1), and a heat generating device (2) is arranged inside the battery cell (1), and the heat generating device (2) includes a second One layer of heating sheet (2-1), the first layer of heating sheet (2-1) is respectively connected with the first tab (21) of the first layer of heating sheet extending out of the battery core, and the second tab of the first layer of heating sheet (22) are connected, and the control switch (5) is made up of the first control switch (51) and the second control switch (52); the external device and the second control switch (52) form the first branch circuit, and the first battery ear (11), the electric core (1) and the second electric core tab (12) form the second branch circuit, the first tab of the first layer of heating sheet (21), the first layer of heating sheet (2-1), the second The second pole tab (22) and the first control switch (51) of one layer of heating sheet form the third branch; the second branch can be connected in series with the first branch and the third branch respectively, or the second branch can be connected with the first branch Three branches connected in parallel and connected in series with the first branch
进一步地，第二支路能够分别与第一支路、第三支路串联时，外部装置为负载(6)。Further, when the second branch can be connected in series with the first branch and the third branch respectively, the external device is a load (6).
进一步地，第二支路与第三支路并联后和第一支路串联时，外部装置为充电装置(7)。Further, when the second branch is connected in parallel with the third branch and connected in series with the first branch, the external device is a charging device (7).
进一步地，电芯为卷绕式或叠片式。Further, the electric core is a winding type or a laminated type.
进一步地，电池为方形或圆柱电池。Further, the battery is a square or cylindrical battery.
进一步地，电池为液态、半固态或固态锂离子电池。Further, the battery is a liquid, semi-solid or solid lithium ion battery.
进一步地，产热装置(2)包括第二层加热片(2-2)，第二层加热片(2-2)分别与延伸出电芯外的第二层加热片第一极耳(23)、第二层加热片第二极耳(24)相连，第二层加热片第一极耳(23)、第二层加热片(2-2)、第二层加热片第二极耳(24)、第三控制开关组成第四支路，第四支路能够与第三支路串联或并联形成共同支路；第二支路能够分别与第一支路、共同支路串联，或第二支路与共同支路并联后和第一支路串联。Further, the heat generating device (2) includes a second layer of heating sheet (2-2), and the second layer of heating sheet (2-2) is respectively connected with the first tab (23) of the second layer of heating sheet extending out of the electric core. ), the second layer of heating sheet second pole ear (24) is connected, the second layer of heating sheet first pole ear (23), the second layer of heating sheet (2-2), the second layer of heating sheet second pole ear ( 24), the third control switch forms the fourth branch, and the fourth branch can be connected in series or in parallel with the third branch to form a common branch; the second branch can be connected in series with the first branch or the common branch, or the second branch The two branches are connected in parallel with the common branch and then connected in series with the first branch.
进一步地，产热装置由能够产生焦耳热的金属或者无机非金属材质制成。Further, the heat generating device is made of metal or inorganic non-metallic material capable of generating Joule heat.
本实用新型的有益效果为：The beneficial effects of the utility model are:
(1)通过产热装置热量补偿，可以提高锂离子电池的温度适用性，尤其是低温环境适应性，使用锂离子电池充放电性能在更宽的温度范围内发挥到相对较高的水平，本申请当锂离子电池温度由-30℃提升到30℃后与现有技术锂离子电池-30℃相比，1C倍率的放电容量增加近一倍。(1) Through the heat compensation of the heat generating device, the temperature applicability of the lithium-ion battery can be improved, especially the low-temperature environment adaptability, and the charging and discharging performance of the lithium-ion battery can be exerted to a relatively high level in a wider temperature range. Application When the temperature of the lithium-ion battery is increased from -30°C to 30°C, compared with the prior art lithium-ion battery at -30°C, the discharge capacity of the 1C rate is nearly doubled.
(2)通过切换第一控制开关、第二控制开关的闭合，能够及时启动加热，保证良好的工作状态，在加热后能，显著提高锂离子电池电容量和充电速度。(2) By switching the closing of the first control switch and the second control switch, the heating can be started in time to ensure a good working state, and the lithium-ion battery capacity and charging speed can be significantly improved after heating.
附图说明Description of drawings
图1为锂离子电池的结构示意图；Fig. 1 is the structural representation of lithium-ion battery;
图2为锂离子电池带负载时的连接示意图；Figure 2 is a schematic diagram of the connection of the lithium-ion battery with a load;
图3为锂离子电池的产热装置为单层装配正视示意图；Fig. 3 is a schematic diagram of a front view of a single-layer assembly of a heat generating device of a lithium-ion battery;
图4为图3中A-A剖面示意图；Fig. 4 is A-A sectional schematic diagram among Fig. 3;
图5为锂离子电池的产热装置为双层装配正视示意图；Fig. 5 is a schematic diagram of the front view of the heat generating device of the lithium-ion battery as a double-layer assembly;
图6为锂离子电池的产热装置为双层装配俯视示意图；Fig. 6 is a schematic diagram of a top view of a double-layer assembly of a heat generating device of a lithium-ion battery;
图7为图5中B-B剖面示意图；Fig. 7 is B-B sectional schematic diagram among Fig. 5;
图8为锂离子电池产热装置为单层装配的带负载电路连接示意图；Fig. 8 is a schematic diagram of a circuit connection with a load of a single-layer assembly of a lithium-ion battery heat generating device;
图9为锂离子电池产热装置为单层装配的带充电装置电路连接示意图；Fig. 9 is a schematic diagram of the circuit connection of a charging device with a lithium-ion battery heat generating device assembled in a single layer;
其中，1：电芯，11:第一电芯极耳，12：第二电芯极耳，2：产热装置，2-1：第一层加热片，2-2：第二层加热片，21：第一层加热片第一极耳，22：第一层加热片第二极耳，23：第二层加热片第一极耳。24：第二层加热片第二极耳，3：第一温度采集器，4：第二温度采集器，5：控制开关，51：第一控制开关，52：第二控制开关，6：负载，7：充电装置。Among them, 1: cell, 11: first cell tab, 12: second cell tab, 2: heat generating device, 2-1: first layer heating sheet, 2-2: second layer heating sheet , 21: the first tab of the first layer of heating sheet, 22: the second tab of the first layer of heating sheet, 23: the first tab of the second layer of heating sheet. 24: The second tab of the second heating sheet, 3: The first temperature collector, 4: The second temperature collector, 5: Control switch, 51: The first control switch, 52: The second control switch, 6: Load , 7: charging device.
具体实施方式Detailed ways
结合附图1-9进一步地，对本实用新型进行说明。The utility model is further described in conjunction with accompanying drawings 1-9.
实施例1Example 1
如图1-4，8-9所示，一种带内部加热装置的锂离子电池，电池内部设置有电芯(1)，电芯(1)上端设置有第一电芯极耳(11)、第二电芯极耳(12)，第一电芯极耳(11)、第二电芯极耳(12)分别与电芯(1)相连，电芯(1)内部设置有产热装置(2)，产热装置(2)包括第一层加热片(2-1)，第一层加热片(2-1)分别与延伸出电芯外的第一层加热片第一极耳(21)、第一层加热片第二极耳(22)相连，第一温度采集器(3)设置在电芯内部，第二温度采集器(4)设置在电池表面，控制开关(5)能够接收第一温度采集器(3)、第二温度采集器(4)的信号，控制开关(5)由第一控制开关(51)和第二控制开关(52)组成；外部装置和第二控制开关(52)组成第一支路，第一电芯极耳(11)、电芯(1)和第二电芯极耳(12)组成第二支路，一层加热片第一极耳(21)、第一层加热片(2-1)、第一层加热片第二极耳(22)、第一控制开关(51)组成第三支路。产热装置由能够产生焦耳热的金属或者无机非金属材质制成。第一温度采集器(3)为热电偶或热敏电阻，第二温度采集器(4)为热电偶或热敏电阻。As shown in Figures 1-4 and 8-9, a lithium-ion battery with an internal heating device is provided with a cell (1) inside the battery, and a first cell tab (11) is provided at the upper end of the cell (1) 1. The second cell tab (12), the first cell tab (11), and the second cell tab (12) are respectively connected to the cell (1), and a heat generating device is arranged inside the cell (1) (2), the heat generating device (2) comprises a first layer of heating sheet (2-1), and the first layer of heating sheet (2-1) is respectively connected with the first tab of the first layer of heating sheet extending out of the electric core ( 21), the first layer of heating sheet is connected to the second tab (22), the first temperature collector (3) is arranged inside the battery cell, the second temperature collector (4) is arranged on the surface of the battery, and the control switch (5) can Receiving the signals of the first temperature collector (3) and the second temperature collector (4), the control switch (5) is made up of the first control switch (51) and the second control switch (52); the external device and the second control switch The switch (52) forms the first branch circuit, the first cell tab (11), the cell (1) and the second cell tab (12) form the second branch circuit, and the first tab of a layer of heating sheet ( 21), the first layer of heating sheet (2-1), the second tab of the first layer of heating sheet (22), and the first control switch (51) form the third branch. The heat generating device is made of metal or inorganic non-metallic material capable of generating Joule heat. The first temperature collector (3) is a thermocouple or a thermistor, and the second temperature collector (4) is a thermocouple or a thermistor.
电芯为卷绕式或叠片式。电池为方形或圆柱电池。电池为液态、半固态或固态锂离子电池。当产热装置为如图3-4所示的单层结构装配时，产热装置2放置于锂离子电池厚度方向1/2处。The battery core is wound type or laminated type. The battery is a square or cylindrical battery. The batteries are liquid, semi-solid or solid lithium-ion batteries. When the heat generating device is assembled with a single-layer structure as shown in Figure 3-4, the heat generating device 2 is placed at 1/2 of the thickness direction of the lithium-ion battery.
当需要锂离子电池向负载正常供电或向加热装置供电获得温升时，第二支路能够分别与第一支路、第三支路串联，外部装置为负载(6)。第一温度采集器(3)、第二温度采集器(4)能够分别控制第一控制开关(51)的启闭，第一温度采集器(3)、第二温度采集器(4)能够分别控制第二控制开关(52)的启闭。When the lithium-ion battery is required to supply power to the load normally or supply power to the heating device to obtain temperature rise, the second branch can be connected in series with the first branch and the third branch respectively, and the external device is the load (6). The first temperature collector (3), the second temperature collector (4) can control the opening and closing of the first control switch (51) respectively, and the first temperature collector (3), the second temperature collector (4) can respectively Control the opening and closing of the second control switch (52).
实施例2Example 2
由充电装置向锂离子电池和产热装置供电，此时第二支路与第三支路并联后和第一支路串联，外部装置为充电装置(7)。第一温度采集器(3)、第二温度采集器(4)能够分别控制第一控制开关(51)的启闭，第一温度采集器(3)、第二温度采集器(4)能够分别控制第二控制开关(52)的启闭。其余与实施例1相同。The charging device supplies power to the lithium-ion battery and the heat generating device. At this time, the second branch is connected in parallel with the third branch and then connected in series with the first branch. The external device is the charging device (7). The first temperature collector (3), the second temperature collector (4) can control the opening and closing of the first control switch (51) respectively, and the first temperature collector (3), the second temperature collector (4) can respectively Control the opening and closing of the second control switch (52). All the other are identical with embodiment 1.
实施例3Example 3
产热装置(2)包括第二层加热片(2-2)，第二层加热片(2-2)分别与延伸出电芯外的第二层加热片第一极耳(23)、第二层加热片第二极耳(24)相连，第二层加热片第一极耳(23)、第二层加热片(2-2)、第二层加热片第二极耳(24)、第三控制开关组成第四支路，第四支路能够与第三支路串联或并联形成共同支路；第二支路能够分别与第一支路、共同支路串联，或第二支路与共同支路并联后和第一支路串联。The heat generating device (2) comprises a second layer of heating sheet (2-2), and the second layer of heating sheet (2-2) is connected with the first tab (23) and the second layer of heating sheet extending out of the electric core respectively. The second pole ear (24) of the two-layer heating sheet is connected, the first pole ear (23) of the second layer heating sheet, the second layer heating sheet (2-2), the second pole ear (24) of the second layer heating sheet, The third control switch forms the fourth branch, and the fourth branch can be connected in series or in parallel with the third branch to form a common branch; the second branch can be connected in series with the first branch, the common branch, or the second branch respectively After being connected in parallel with the common branch, it is connected in series with the first branch.
当产热装置为如图5-7所示的双层结构装配时，产热装置2放置于锂离子电池厚度方向1/4处。When the heat generating device is assembled with a double-layer structure as shown in Figure 5-7, the heat generating device 2 is placed at 1/4 of the thickness direction of the lithium-ion battery.
本申请所用1：电芯，11:第一电芯极耳，12：第二电芯极耳，2：产热装置，2-1：第一层加热片，2-2：第二层加热片，21：第一层加热片第一极耳，22：第一层加热片第二极耳，23：第二层加热片第一极耳，24：第二层加热片第二极耳，6：负载，7：充电装置均为市场售卖产品和型号。第一温度采集器和第二温度采集器为带有信号收发功能的市场售卖产品和型号。5：控制开关，51：第一控制开关，52：第二控制开关均为具有信号收发功能的市场售卖产品和型号的温控器。1 used in this application: cell, 11: first cell tab, 12: second cell tab, 2: heat generating device, 2-1: first layer heating sheet, 2-2: second layer heating Sheet, 21: the first tab of the first layer of heating sheet, 22: the second tab of the first layer of heating sheet, 23: the first tab of the second layer of heating sheet, 24: the second tab of the second layer of heating sheet, 6: load, 7: charging device are all products and models sold in the market. The first temperature collector and the second temperature collector are products and models sold on the market with signal transceiver functions. 5: control switch, 51: first control switch, 52: second control switch are thermostats of products and models sold in the market with signal sending and receiving functions.
以上所述仅为本实用新型的优选实施例而已，并不用于限制本实用新型，尽管参照前述实施例对本实用新型进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本实用新型的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it can still understand the aforementioned The technical solutions described in each embodiment are modified, or some of the technical features are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075786.1U CN209592267U (en) | 2019-01-17 | 2019-01-17 | A lithium-ion battery with internal heating |
| KR1020207011607A KR102308268B1 (en) | 2019-01-17 | 2019-01-28 | Lithium-ion battery with internal heating |
| JP2020523266A JP2021514518A (en) | 2019-01-17 | 2019-01-28 | Lithium-ion battery with internal heating device |
| EP19872260.5A EP3713008A4 (en) | 2019-01-17 | 2019-01-28 | LITHIUM-ION BATTERY WITH INTERNAL HEATING DEVICE |
| US16/760,099 US11342606B2 (en) | 2019-01-17 | 2019-01-28 | Lithium ion battery with an internal heating device |
| PCT/CN2019/073341 WO2020147148A1 (en) | 2019-01-17 | 2019-01-28 | Lithium ion battery having internal heating device |
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