Battery module and electronic equipment

Abstract

The invention discloses a battery module and electronic equipment, and relates to the field of electronic products and heat dissipation. The battery module comprises a battery and a heat management assembly, the battery comprises a battery cell and a protection plate, and the protection plate is electrically connected with the battery cell; the thermal management assembly comprises a temperature difference refrigeration part, a temperature difference power generation part and a heat transfer part, the temperature difference refrigeration part and the temperature difference power generation part are both arranged on the outer side of the battery cell and are both electrically connected with the protection plate, and the heat transfer part is arranged on the side, away from the battery cell, of the temperature difference refrigeration part and the side, away from the battery cell, of the temperature difference power generation part. The problem that energy consumption is increased in a current heat dissipation mode at least can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic products and heat dissipation, and specifically relates to a battery module and an electronic device. Background Art

[0002] Thermal management of laptop batteries is an important part of ensuring laptop performance and extending battery life. With the development of technology, battery thermal management methods are also constantly improving. In related technologies, thermal management of some laptops mainly uses air cooling or liquid cooling to achieve heat dissipation of the battery.

[0003] However, in the process of using air cooling or liquid cooling to dissipate heat from the battery, the battery is required to provide electrical energy, which will increase energy consumption, affect the battery life of the laptop, and also increase vibration, noise, etc., affecting the user experience. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a battery module and an electronic device that can solve the problem of increased energy consumption caused by the current heat dissipation method.

[0005] In order to solve the above technical problems, this application is implemented as follows: The embodiment of the present application provides a battery module, including: a battery and a thermal management component; The battery comprises a battery cell and a protection plate, wherein the protection plate is electrically connected to the battery cell; The thermal management component includes a temperature difference cooling element, a temperature difference power generation element and a heat transfer element. The temperature difference cooling element and the temperature difference power generation element are both arranged on the outside of the battery cell and are both electrically connected to the protection plate. The heat transfer element is arranged on the side of the temperature difference cooling element and the temperature difference power generation element respectively facing away from the battery cell.

[0006] An embodiment of the present application also provides an electronic device, comprising the above-mentioned battery module.

[0007] In the embodiment of the present application, power is supplied to the temperature difference cooling element through the battery cell to cool the battery cell through the temperature difference cooling element, and heat is released to the heat transfer element, and finally dissipated through the heat transfer element, thereby achieving a cooling effect on the battery cell to prevent the battery cell from overheating, which is beneficial to improving the service life of the battery; the temperature difference between the battery cell and the heat transfer element can be used by the temperature difference power generation element to generate electrical energy, and the electrical energy is transferred to the battery cell for storage, so that the heat generated by the battery cell can be recovered and converted into electrical energy, thereby improving energy utilization efficiency, and the electrical energy consumed in the refrigeration process of the temperature difference cooling element can be compensated, which is beneficial to improving battery life. In addition, compared with air cooling or liquid cooling, the embodiment of the present application can not only reduce energy consumption, but also eliminate and avoid the generation of vibration and noise, which is beneficial to improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the assembly of the battery module disclosed in the embodiment of the present application; Figure 2 A disassembly diagram of a battery module disclosed in an embodiment of the present application; Figure 3 This is a schematic diagram of the temperature difference refrigeration element disclosed in the embodiment of the present application; Figure 4 This is a schematic diagram of the temperature difference power generation device disclosed in the embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the temperature difference power generation device disclosed in the embodiment of the present application.

[0009] Description of reference numerals: 10-Battery; 11-battery cell; 12-protection board; 20- Thermal management components; 21-temperature difference refrigeration element; 211-refrigeration end; 212-heat release end; 22-temperature difference power generation element; 23-heat transfer element; 231-first metal foil layer; 2311-connecting edge; 232-second metal foil layer; 30-fixed frame; 31-first slot; 32-second slot; 40-Cover. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0011] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0012] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0013] refer to Figures 1 to 5 The embodiment of the present application discloses a battery module, which can be applied to electronic devices, wherein the electronic devices can be mobile phones, computers (such as laptop computers, tablet computers, etc.), e-books, etc. The disclosed battery module includes a battery 10 and a thermal management component 20.

[0014] The battery 10 is the core component of the battery module, which is used to store and release electrical energy. In some embodiments, the battery 10 may include a battery cell 11 and a protection board 12. The battery cell 11 is used to store electrical energy, and the protection board 12 is electrically connected to the battery cell 11 to protect the battery cell 11. Among them, the battery cell 11 can be charged and discharged through the protection board 12. In addition, the protection board 12 can be connected to other detection elements to detect the amount of electricity in the battery cell 11 and the temperature of the battery cell 11. Of course, the protection board 12 can also be used to control the charging and discharging current, voltage, etc. Therefore, the protection board 12 can protect the battery cell 11. Exemplarily, the protection board 12 can detect the temperature of the battery cell 11 in real time through a temperature detection element.

[0015] Considering that the battery 10 generates a certain amount of heat during the charging or discharging process, which causes the overall temperature of the battery 10 to rise, excessively high temperature will affect the charging and discharging efficiency, and excessively high temperature for a long time will also affect the overall service life of the battery 10. Therefore, it is necessary to control the temperature of the battery 10 to ensure that the battery 10 is kept within a reasonable temperature range during the charging or discharging process, which is conducive to improving the charging or discharging efficiency of the battery 10 and increasing the service life of the battery 10.

[0016] Based on the above situation, the embodiment of the present application adds a thermal management component 20, through which the temperature of the battery 10 can be managed and regulated to ensure that the temperature of the battery 10 is not too high during charging or discharging.

[0017] The thermal management component 20 may include a temperature difference cooling element 21 and a heat transfer element 23. The temperature difference cooling element 21 is arranged on the outside of the battery cell 11 and is electrically connected to the protection plate 12, and the heat transfer element 23 is arranged on the side of the temperature difference cooling element 21 away from the battery cell 11. Based on this arrangement, the battery cell 11 can supply power to the temperature difference cooling element 21 through the protection plate 12 so that the temperature difference cooling element 21 can work normally. Since the temperature difference cooling element 21 is in contact with the battery cell 11 and the heat transfer element 23 respectively, at the same time, during the discharge or charging process of the battery 10, the temperature of the battery cell 11 increases. When the temperature of the battery cell 11 exceeds the preset temperature, the temperature difference cooling element 21 is started, and the battery cell 11 is cooled by the temperature difference cooling element 21. At the same time, the heat generated by the temperature difference cooling element 21 during the cooling process will be transferred to the heat transfer element 23, and the heat will be dissipated through the heat transfer element 23, so that the heat dissipation effect of the battery cell 11 can be achieved, ensuring that the temperature of the battery cell 11 will not be too high.

[0018] As the temperature difference cooling element 21 continues to work, the temperature of the battery cell 11 will gradually decrease and eventually return to the preset temperature range. In addition, during the cooling process, the temperature difference cooling element 21 will continue to release heat to the heat transfer element 23, so that the temperature of the heat transfer element 23 gradually increases and the temperature of the heat transfer element 23 is higher than the temperature of the battery cell 11, that is, a temperature difference is generated between the heat transfer element 23 and the battery cell 11.

[0019] Considering that the temperature difference cooling element 21 will consume part of the electric energy in the battery cell 11 in the process of cooling the battery cell 11, when the temperature difference cooling element 21 works for a long time, it will have a certain impact on the battery life of the battery 10. Based on this setting, the thermal management component 20 in the embodiment of the present application can also include a temperature difference power generation element 22, which is arranged on the outside of the battery cell 11 and is electrically connected to the protection plate 12, and the heat transfer element 23 is arranged on the side of the temperature difference power generation element 22 away from the battery cell 11. Based on this setting, since the temperature difference power generation element 22 is in contact with the battery cell 11 and the heat transfer element 23 respectively, and there is a temperature difference between the heat transfer element 23 and the battery cell 11, the temperature difference power generation element 22 can generate electric energy under the action of the temperature difference, and transmit the electric energy to the battery cell 11 via the protection plate 12, so as to be stored through the battery cell 11, thereby increasing the storage capacity of the battery 10. In addition, during the process of converting heat into electrical energy, the thermoelectric power generation element 22 can also absorb the heat of the heat transfer element 23 and the battery cell 11 , thereby facilitating cooling of the battery cell 11 .

[0020] It should be noted here that the temperature difference refrigeration element 21 can be started when the temperature of the battery cell 11 exceeds the highest value of the preset temperature range, so as to cool the battery cell 11 and return the temperature of the battery cell 11 to the temperature value within the preset temperature range, such as the lowest value; the temperature difference power generation element 22 can be started when the temperature of the heat transfer element 23 is higher than the temperature of the battery cell 11, so as to realize power generation when there is a temperature difference between the heat transfer element 23 and the battery cell 11. In addition, during the operation of the temperature difference refrigeration element 21, the battery cell 11 will be continuously cooled, and heat will be continuously released to the heat transfer element 23, so that the temperature difference between the heat transfer element 23 and the battery cell 11 can be gradually increased, which can be beneficial to improve the power generation efficiency of the temperature difference power generation element 22.

[0021] refer to Figure 3 The temperature difference cooling element 21 uses the Peltier effect to reduce the temperature of the battery. Its working principle is: when a direct current passes through a thermocouple composed of two semiconductor materials with different conductivity (N-type semiconductor and P-type semiconductor), it will cool on the surface of one semiconductor and release heat on the surface of the other semiconductor. This cooling method has the advantages of no noise, small size, fast response speed, high efficiency and energy saving, and long life.

[0022] refer to Figure 4 The working principle of the thermoelectric power generation device 22 is that when the junctions of two different metals or semiconductors are at different temperatures, current will be generated in a closed circuit. The thermoelectric power generation device 22 is composed of thermoelectric materials and metal foils stacked alternately, and generates electricity under the action of temperature difference. This power generation method has the advantages of no noise, small size, etc.

[0023] In the embodiment of the present application, the temperature difference cooling element 21 is powered by the battery cell 11 to cool the battery cell 11 through the temperature difference cooling element 21, and release heat to the heat transfer element 23, and finally dissipate it through the heat transfer element 23, so as to achieve the cooling effect on the battery cell 11, so as to prevent the battery cell 11 from overheating, which is beneficial to improve the service life of the battery 10; the temperature difference power generation element 22 can use the temperature difference between the battery cell 11 and the heat transfer element 23 to generate electrical energy, and transfer the electrical energy to the battery cell 11 for storage, so that the heat generated by the battery cell 11 can be recovered and converted into electrical energy, so as to improve the energy utilization efficiency, and the electrical energy consumed in the cooling process of the temperature difference cooling element 21 can be compensated, which is beneficial to improve the endurance of the battery 10. In addition, compared with air cooling or liquid cooling, the embodiment of the present application can not only reduce energy consumption, but also eliminate and avoid the generation of vibration and noise, which is beneficial to improve the user experience.

[0024] refer to Figure 3In some embodiments, the temperature difference cooling element 21 may include a cooling end 211 and a heat release end 212 that are arranged in opposite directions. The cooling end 211 is in contact with the battery cell 11 for cooling the battery cell 11, and the heat release end 212 is in contact with the heat transfer element 23 for releasing heat to the heat transfer element 23. Based on this, the temperature difference cooling element 21 in the embodiment of the present application is used to cool the battery cell 11 through the cooling end 211, and release heat to the heat transfer element 23 through the heat release end 212, and finally dissipate the heat through the heat transfer element 23 to achieve cooling of the battery cell 11, thereby effectively preventing the battery 10 from overheating during charging or discharging, and ensuring that the temperature of the battery 10 is within a reasonable range.

[0025] In other embodiments, the cooling end 211 and the battery cell 11 may also be fixedly connected, such as by bonding, to ensure the reliability of the contact between the temperature difference cooling element 21 and the battery cell 11; similarly, the heat release end 212 and the heat transfer element 23 may also be fixedly connected, such as by bonding, to ensure the reliability of the contact between the temperature difference cooling element 21 and the heat transfer element 23.

[0026] Furthermore, a heat-conducting layer may be provided between the cooling end 211 and the battery cell 11, and the heat-conducting layer may enable rapid heat transfer between the cooling end 211 with a lower temperature and the battery cell 11 with a higher temperature, which is beneficial to improving the cooling efficiency of the cooling end 211 on the battery cell 11; similarly, a heat-conducting layer may be provided between the heat-releasing end 212 and the heat-transferring member 23, and the heat-conducting layer may be beneficial to improving the heat-conducting efficiency between the heat-releasing end 212 and the heat-transferring member 23. Exemplarily, the heat-conducting layer may be made of a heat-conducting silicone material.

[0027] In some embodiments, the heat transfer element 23 may have a housing cavity, and the battery cell 11, the protection plate 12, the temperature difference cooling element 21, and the temperature difference power generation element 22 may all be disposed in the housing cavity. Based on this arrangement, the heat transfer element 23 can be used to dissipate heat, and the heat transfer element 23 can also play a certain protective role on the battery cell 11, the protection plate 12, the temperature difference cooling element 21, and the temperature difference power generation element 22.

[0028] Optionally, the heat transfer element 23 may be a shell, such as a metal shell, which has greater strength and good heat transfer effect.

[0029] refer to Figure 1 and Figure 2 The heat transfer element 23 may include a first metal foil layer 231 and a second metal foil layer 232, and the first metal foil layer 231 and the second metal foil layer 232 are respectively disposed on opposite sides of the battery cell 11. Based on this, the first metal foil layer 231 and the second metal foil layer 232 can respectively protect the opposite sides of the battery cell 11.

[0030] Further, along the thickness direction of the battery 10, the temperature difference cooling element 21 is provided on at least one side of the battery cell 11, and / or, along the thickness direction of the battery 10, the temperature difference power generation element 22 can be provided on at least one side of the battery cell 11. Correspondingly, the heat transfer element 23 can be provided on at least one side of the battery cell 11, wherein the heat transfer element 23 can include at least one of a first metal foil layer 231 and a second metal foil layer 232.

[0031] Optionally, the temperature difference cooling element 21 and the temperature difference power generation element 22 can both be arranged between one side of the battery cell 11 and the first metal foil layer 231. In this way, the battery cell 11 can be cooled on one side of the battery cell 11 by the temperature difference cooling element 21, and heat can be released to the first metal foil layer 231 so as to dissipate the heat through the first metal foil layer 231; power generation can be generated between one side of the battery cell 11 and the first metal foil layer 231 based on the temperature difference between the first metal foil layer 231 and one side of the battery cell 11 by the temperature difference power generation element 22, and the generated electric energy can be stored in the battery cell 11.

[0032] The temperature difference cooling element 21 and the temperature difference power generation element 22 are both arranged between the other side of the battery cell 11 and the second metal foil layer 232. In this way, the other side of the battery cell 11 can be cooled by the temperature difference cooling element 21, and heat can be released to the second metal foil layer 232, so that the heat can be dissipated through the second metal foil layer 232; the temperature difference power generation element 22 is used between the other side of the battery cell 11 and the second metal foil layer 232 to generate electricity based on the temperature difference between the second metal foil layer 232 and the other side of the battery cell 11, and the generated electrical energy is stored in the battery cell 11.

[0033] Of course, the temperature difference cooling element 21 and the temperature difference power generation element 22 can also be both arranged between one side of the battery cell 11 and the first metal foil layer 231, and the temperature difference cooling element 21 and the temperature difference power generation element 22 can be both arranged between the other side of the battery cell 11 and the second metal foil layer 232. This arrangement can use the temperature difference cooling elements 21 on both sides to cool the first metal foil layer 231 and the second metal foil layer 232 respectively, and release heat to the first metal foil layer 231 and the second metal foil layer 232 respectively, thereby improving the cooling effect on the battery cell 11 to prevent the battery 10 from being overheated. In addition, the temperature difference power generation elements 22 on both sides can respectively utilize the temperature difference between the first metal foil layer 231 and one side of the battery cell 11 and the temperature difference between the second metal foil layer 232 and the other side of the battery cell 11 to generate electricity, thereby generating more electrical energy and storing it in the battery cell 11, which is beneficial to improving the battery life of the battery 10.

[0034] In some embodiments, the first metal foil layer 231 and the second metal foil layer 232 can be butted against each other, so as to protect the battery cell 11, the protective plate 12, the temperature difference cooling element 21 and the temperature difference power generation element 22. Optionally, the first metal foil layer 231 and the second metal foil layer 232 can be detachably connected to facilitate placing the battery cell 11, the protective plate 12, the temperature difference cooling element 21 and the temperature difference power generation element 22 between the first metal foil layer 231 and the second metal foil layer 232. It should be noted here that the first metal foil layer 231 and the second metal foil layer 232 can enclose a containing cavity, and of course, they can also mainly cover the opposite sides of the battery cell 11, which can be set according to actual working conditions.

[0035] refer to Figure 2 In some embodiments, at least one of the first metal foil layer 231 and the second metal foil layer 232 may have a connection edge 2311 at its edge, and the connection edge 2311 of one of the first metal foil layer 231 and the second metal foil layer 232 is connected to the edge of the other. For example, the edge of the first metal foil layer 231 may have a connection edge 2311, and the connection edge 2311 is connected to the edge of the second metal foil layer 232; or the edge of the second metal foil layer 232 may have a connection edge 2311, and the connection edge 2311 is connected to the edge of the first metal foil layer 231.

[0036] Based on the above configuration, the first metal foil layer 231 and the second metal foil layer 232 can be butted against each other to ensure the stability and reliability of the installation between the heat transfer element 23 and the battery 10 and prevent the heat transfer element 23 from being separated from the battery 10 .

[0037] Optionally, the connecting edge 2311 may form a bent structure and be buckled at the edge to achieve a reliable connection between the first metal foil layer 231 and the second metal foil layer 232 .

[0038] In some more specific embodiments, the heat transfer element 23 can be a copper foil label, which can not only display the parameter information of the battery module, but also dissipate the heat generated by the battery cell 11, and also protect the battery cell 11, the protective plate 12, the temperature difference cooling element 21 and the temperature difference power generation element 22.

[0039] Continue to refer Figure 2In some embodiments, the battery module may further include a fixing frame 30, which is used to fix and install components such as the battery cell 11 and the protection plate 12. The fixing frame 30 is provided with at least one first slot 31 and a second slot 32, the battery cell 11 is provided in the first slot 31, and the protection plate 12 is provided in the second slot 32; based on this, the battery cell 11 can be accommodated by the first slot 31, and the side wall of the first slot 31 can limit the battery cell 11 to ensure the stability of the battery cell 11 and prevent the battery cell 11 from moving at will; the protection plate 12 can be accommodated by the second slot 32, and the side wall of the second slot 32 can limit the protection plate 12 to ensure the stability of the protection plate 12 and prevent the protection plate 12 from moving at will.

[0040] In addition, the battery module may further include a cover plate 40, which is arranged at the notch of the second slot 32 to separate the protection plate 12 from the heat transfer element 23. Based on this arrangement, on the one hand, the protection plate 12 can be limited to prevent the protection plate 12 from being separated, and on the other hand, the contact on the protection plate 12 can be effectively prevented from contacting with the heat transfer element 23 to generate electrical connection.

[0041] Exemplarily, the fixing frame 30 may be made of a non-metal material, such as plastic, resin, etc.; the cover plate 40 may be made of a non-metal material, such as plastic, resin, etc.

[0042] In some more specific embodiments, the fixing frame 30 may be provided with a plurality of first slots 31 , and the plurality of first slots 31 are arranged in sequence side by side, so that the plurality of battery cells 11 may be accommodated by the plurality of first slots 31 to limit the plurality of battery cells 11 respectively.

[0043] In some embodiments, the battery 10 may include a plurality of battery cells 11, the plurality of battery cells 11 are arranged in sequence, and the plurality of battery cells 11 are electrically connected to the protection plate 12, and a temperature difference cooling element 21 and a temperature difference power generation element 22 are provided on the outside of each battery cell 11. Based on this arrangement, the corresponding battery cells 11 can be cooled by the temperature difference cooling element 21 to ensure that the temperature of each battery cell 11 is not too high, and the temperature difference power generation element 22 utilizes the temperature difference between the corresponding heat transfer element 23 and the battery cell 11 to realize power generation, thereby improving the power generation efficiency.

[0044] Taking into account that in the battery module, the battery cell 11 and the thermal management component 20 are electrically connected using the same protective plate 12, in the embodiment of the present application, the fixed frame 30 may be provided with a second slot 32, which extends along the arrangement direction of the multiple first slots 31, and the protective plate 12 may be located in the second slot 32 and extend along the arrangement direction of the multiple battery cells 11. In this way, the multiple battery cells 11 can be electrically connected to the protective plate 12 respectively, and the temperature difference cooling components 21 and the temperature difference power generation components 22 respectively arranged corresponding to the multiple battery cells 11 are all electrically connected to the protective plate 12.

[0045] Based on the above battery module, the embodiment of the present application also discloses an electronic device, and the disclosed electronic device includes the above battery module. The embodiment of the present application can effectively solve the problem of overheating of the battery module of the electronic device by using the cooperation of the temperature difference cooling element 21 and the temperature difference power generation element 22, and improve the performance and service life of the battery module. At the same time, the heat generated by the battery module can be recovered and converted into electrical energy to improve energy utilization efficiency.

[0046] In summary, the present application implements the integration of the temperature difference cooling element 21 and the temperature difference power generation element 22 into the battery 10, forming an efficient thermal management and heat energy recovery system; the integrated temperature difference cooling element 21 utilizes the Peltier effect to reduce the temperature of the battery 10, prevents the battery 10 from overheating, and alleviates the problem of performance degradation and even safety risks of the battery 10 due to overheating, thereby helping to extend the service life of the battery 10 and maintain its performance; the waste heat energy generated by the battery 10 during operation is converted into electrical energy through the temperature difference power generation element 22, which not only reduces energy waste but also improves energy utilization efficiency.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery module, characterized in that: include: A battery (10) and a thermal management component (20); The battery (10) comprises a battery cell (11) and a protection plate (12), wherein the protection plate (12) is electrically connected to the battery cell (11); The thermal management component (20) comprises a temperature difference cooling element (21), a temperature difference power generation element (22) and a heat transfer element (23); the temperature difference cooling element (21) and the temperature difference power generation element (22) are both arranged outside the battery cell (11) and are both electrically connected to the protection plate (12); the heat transfer element (23) is arranged on a side of the temperature difference cooling element (21) and the temperature difference power generation element (22) respectively facing away from the battery cell (11).

2. The battery module according to claim 1, characterized in that: The temperature difference refrigeration element (21) comprises a refrigeration end (211) and a heat release end (212) which are arranged opposite to each other; The cooling end (211) is in contact with the battery core (11), and the heat release end (212) is in contact with the heat transfer element (23); the temperature difference cooling element (21) is used to cool the battery core (11) through the cooling end (211) and release heat to the heat transfer element (23) through the heat release end (212).

3. The battery module according to claim 1, characterized in that: The heat transfer element (23) comprises a first metal foil layer (231) and a second metal foil layer (232), wherein the first metal foil layer (231) and the second metal foil layer (232) are respectively arranged on two opposite sides of the battery core (11).

4. The battery module according to claim 3, characterized in that: A connecting edge (2311) is provided on the edge of at least one of the first metal foil layer (231) and the second metal foil layer (232); The connecting edge (2311) of one of the first metal foil layer (231) and the second metal foil layer (232) is connected to an edge of the other.

5. The battery module according to claim 1, 3 or 4, characterized in that: The heat transfer element (23) is a copper foil label.

6. The battery module according to claim 1, 3 or 4, characterized in that: The heat transfer element (23) has a containing cavity, and the battery core (11), the protection plate (12), the temperature difference cooling element (21) and the temperature difference power generation element (22) are all arranged in the containing cavity.

7. The battery module according to any one of claims 1 to 4, characterized in that: The battery module also includes a fixing frame (30) and a cover plate (40); The fixing frame (30) is provided with at least one first slot (31) and a second slot (32); the battery cell (11) is arranged in the first slot (31), and the protection plate (12) is arranged in the second slot (32); The cover plate (40) is arranged to cover the notch of the second slot (32) and is used to separate the protection plate (12) from the heat transfer element (23).

8. The battery module according to any one of claims 1 to 4, characterized in that: Along the thickness direction of the battery (10), the temperature difference cooling element (21) is arranged on at least one side of the battery core (11); And / or, along the thickness direction of the battery (10), the temperature difference power generation element (22) is arranged on at least one side of the battery core (11).

9. The battery module according to any one of claims 1 to 4, characterized in that: The battery (10) comprises a plurality of battery cells (11) arranged in sequence, and the plurality of battery cells (11) are all electrically connected to the protection plate (12); The temperature difference cooling element (21) and the temperature difference power generation element (22) are provided on the outside of each battery core (11).

10. An electronic device, characterized in that: A battery module comprising any one of claims 1 to 9.

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