Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment wherein the battery pack comprises a box body, at least one battery cell and a first heating element, both the battery cell and the first heating element are located in the box body, and the first heating element is suitable for heating the at least one battery cell and is suitable for limiting the at least one battery cell along the radial direction of the at least one battery cell. The first heating element in the battery pack provided by the utility model not only has the function of heating the battery cell to ensure that the battery cell is in a proper working environment, but also has the function of limiting the position of the battery cell, so that the function reuse is realized. Compared with a structure that the battery cells are fixed by adopting end plates in the prior art, the battery pack not only avoids the material cost required by the end plates, but also can save the occupied space in the battery pack, so that more flexibility is provided for the arrangement of the battery cells, more battery cells can be accommodated in the battery pack with the same volume, and the battery pack is convenient to use. The energy density of the battery pack is improved, so that the purpose of improving the overall performance of the battery pack is achieved.

Description

Technical Field

[0001] This utility model relates to the field of batteries, specifically to a battery pack and electrical equipment. Background Technology

[0002] As a core component of electric vehicles and energy storage systems, the battery pack directly impacts the system's range. In common battery pack designs, multiple cells are typically fixed together using end plates to form cell modules, thus achieving energy storage. However, with the increasing demands on battery pack performance from electric vehicles and energy storage systems, particularly the growing need for optimization in energy density, volume, and cost, how to increase the number of cells within a given space to improve energy density while reducing material costs has become a key focus of current battery technology research. Utility Model Content

[0003] The present invention provides a battery pack and electrical equipment to solve the problems of low energy density and high material cost of battery packs in related technologies.

[0004] In a first aspect, embodiments of the present invention provide a battery pack comprising: a housing; at least one battery cell located within the housing; and a first heating element located within the housing; wherein the first heating element is adapted to heat at least one battery cell and to radially limit at least one battery cell.

[0005] In some embodiments, the first heating element is a silicone heating film.

[0006] In some embodiments, the first heating element is provided with at least one limiting groove, each limiting groove being adapted to limit the corresponding battery cell radially; wherein the first heating element satisfies the following condition: 1.15mm≤d≤2.15mm; where d is the thickness of the first heating element.

[0007] In some embodiments, the battery pack further includes an integrated busbar that abuts against at least one battery cell in the housing toward the first heating element.

[0008] In some embodiments, the housing is further provided with a thermally conductive fixing medium, and at least one battery cell is connected to the housing through the thermally conductive fixing medium.

[0009] In some embodiments, the battery pack further includes a second heating element, and the housing includes a side panel; wherein the second heating element is mounted on the side panel of the housing.

[0010] In some embodiments, the housing is further provided with a thermally conductive fixing medium, and at least one battery cell is connected to the second heating element through the thermally conductive fixing medium.

[0011] In some embodiments, the battery pack further includes a BMS module configured to be electrically connected to each cell; wherein the BMS module is located on the outside of the housing.

[0012] In some embodiments, the enclosure includes a top plate with a reinforcing member on the inner side; wherein the BMS module is mounted on the outer side of the top plate.

[0013] Secondly, embodiments of the present invention provide an electrical device that includes a battery pack as described in the first aspect.

[0014] This utility model provides a battery pack and an electrical device. The battery pack includes a housing, at least one battery cell, and a first heating element. Both the battery cell and the first heating element are located within the housing. The first heating element is adapted to heat at least one battery cell and to radially limit the position of at least one battery cell. The first heating element in the battery pack provided by this utility model not only heats the battery cell to ensure it is in a suitable working environment but also limits its position, thus achieving functional reuse. Compared with the structure in related technologies that uses end plates to fix the battery cells, this battery pack avoids the material costs required for end plates and saves space within the battery pack. This provides more flexibility for the arrangement of the battery cells, allowing more cells to be accommodated in the same volume of battery pack, thereby increasing the energy density of the battery pack and improving the overall performance of the battery pack. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Exploded view of the battery pack;

[0018] Figure 3 yes Figure 2 A schematic diagram of the structure of the first heating element;

[0019] Figure 4 yes Figure 3 Top view of the first heating element;

[0020] Figure 5 yes Figure 4 A cross-sectional view of the first heating element;

[0021] Figure 6 This is an exploded structural diagram of another battery pack provided in this embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of another battery pack structure provided in an embodiment of the present invention;

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Battery pack; 110. Housing; 120. Battery cell; 130. First heating element; 140. Limiting groove; 150. Integrated busbar; 160. Second heating element; 170. Side plate; 180. BMS module. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0026] To address the issues of low energy density and high material costs in related technologies, embodiments of this utility model provide a battery pack 100, please refer to... Figure 1 , Figure 2 , Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention. Figure 2 yes Figure 1 An exploded view of the battery pack shows that the battery pack 100 includes a housing 110, at least one battery cell 120, and a first heating element 130. The battery cell 120 and the first heating element 130 are both installed inside the housing 110. The first heating element 130 is configured to heat at least one battery cell 120, and the first heating element 130 is capable of limiting the battery cell 120 radially.

[0027] In some embodiments, the limiting method for the battery cell 120 may include: a first heating element 130 is configured to be installed at the bottom of the housing 110, and the heating element is provided with a plurality of limiting grooves 140, each limiting groove 140 being used to receive at least a portion of the bottom end of the corresponding battery cell 120. That is, the battery cell 120 is limited by providing the limiting grooves 140 on the first heating element 130. The limiting method for the battery cell 120 may also include: the outer shell of the battery cell 120 is provided with limiting grooves 140 that are fixed relative to the battery cell 120, the first heating element 130 is provided with a snap-fit ​​portion, and the first heating element 130 achieves the limiting function of the battery cell 120 by snapping the snap-fit ​​portion into the limiting grooves 140 of the battery cell 120.

[0028] It should be noted that the specific shapes of the limiting groove 140 and the snap-fit ​​part are not limited here. That is, the shapes of the limiting groove 140 and the snap-fit ​​part can be flexibly adjusted and optimized according to different actual needs. Various connection methods and shapes can be adopted to adapt to different sizes and specifications of battery cells 120.

[0029] The first heating element 130 in the battery pack 100 provided in this embodiment not only heats the battery cell 120 to ensure that the battery cell 120 is in a suitable working environment, but also limits the position of the battery cell 120, thereby achieving functional reuse. Compared with the structure of fixing the battery cell 120 with an end plate in the related technology, the structural design of this embodiment not only avoids the material cost required for the end plate, but also saves the space occupied in the battery pack 100, thereby providing more flexibility for the arrangement of the battery cell 120. This allows more battery cells 120 to be accommodated in the same volume of the battery pack 100, thereby increasing the energy density of the battery pack 100 and achieving the goal of improving the overall performance of the battery pack 100.

[0030] In some embodiments, the first heating element 130 may be a silicone heating film. Because silicone heating films have good elasticity, this embodiment, by setting the first heating element 130 as a silicone heating film, can effectively cope with the thermal expansion that may occur in the battery cell 120 during operation. When the battery cell 120 undergoes thermal expansion, the silicone heating film can deform along with the thermal expansion of the battery cell 120, thereby reducing the risk of compression or damage to the battery cell 120 due to its confinement by a rigid heating element. Furthermore, silicone material itself has good high-temperature resistance and thermal conductivity, thus ensuring that the heating element efficiently and stably provides the required heat for a longer period of time, further improving the overall thermal management effect of the battery pack 100.

[0031] In some embodiments, please refer to Figures 3 to 5 , Figure 3 yes Figure 2 A schematic diagram of the structure of the first heating element 130. Figure 4 yes Figure 3 Top view of the first heating element 130. Figure 5 yes Figure 4 A cross-sectional view of the first heating element 130 is shown. The first heating element 130 is provided with at least one limiting groove 140. Each limiting groove 140 is configured to limit the corresponding battery cell 120 radially. The first heating element 130 satisfies the following condition: 1.15mm≤d≤2.25mm; where d is the thickness of the first heating element 130.

[0032] Specifically, in this embodiment, the first heating element 130, by providing a limiting groove 140, can effectively limit the position of the battery cell 120, thereby reducing the risk of displacement of the battery cell 120 and ensuring the reliability of the battery pack 100. Furthermore, to ensure that the heating performance of the first heating element 130 on the battery cell 120 reaches its optimal state, the thickness d of the first heating element 130 should be controlled between 1.15 mm and 2.25 mm.

[0033] Specifically, experimental verification shows that, on the one hand, when the thickness d of the first heating element 130 is less than 1.15mm, the heat dissipation rate of the first heating element 130 is relatively fast, resulting in low heat conduction efficiency. This leads to poor heating effect of the first heating element 130 on the battery cell 120, thus affecting the overall performance of the battery pack 100. On the other hand, when the thickness d of the first heating element 130 is greater than 2.25mm, the heat conduction efficiency of the first heating element 130 is also low, causing heat to be unable to be quickly conducted to the battery cell 120. Consequently, the battery cell 120 cannot quickly reach a suitable ambient temperature, resulting in a certain delay in regulating the temperature of the first heating element 130 through the temperature regulation device.

[0034] Therefore, by limiting the thickness d of the first heating element 130 within the above-mentioned range, the conduction and dissipation of heat from the first heating element 130 can be effectively balanced to ensure the response speed of the battery cell 120 during the heating process, thereby ensuring that the battery cell 120 can reach the expected operating temperature in a shorter time and ensuring the efficient operation and reliability of the battery pack 100 system.

[0035] In some embodiments, please refer to Figure 6The battery pack 100 includes not only a housing 110, at least one battery cell 120, and a first heating element 130, but also an integrated busbar 150. The integrated busbar 150 is configured to abut against at least one battery cell 120 toward the first heating element 130 in the housing 110. In this embodiment, the integrated busbar 150 of the battery pack 100 can not only realize functions such as current distribution among multiple battery cells 120, but also fix the battery cell 120 to the housing 110 by abutting against the battery cell 120 and applying appropriate pressure, thereby enhancing the stability of the battery cell 120 in the housing 110 and ensuring the reliability of the battery pack 100.

[0036] This structural design simplifies the structure of the battery pack 100 by reusing the basic functions of the integrated busbar 150 (current distribution function as described above) with the cell fixing function. Through this integration, the battery pack 100 eliminates the need for additional dedicated fasteners to ensure the position and stability of the cells 120. This not only effectively reduces the difficulty of assembling the battery pack 100 and lowers the material cost of related fasteners, but also optimizes the space utilization of the battery pack 100, allowing it to accommodate more cells 120 within the same space compared to related technologies, thereby increasing the energy density of the battery pack 100.

[0037] In some embodiments, a thermally conductive fixing medium (not shown in the drawings) is provided inside the housing 110. The thermally conductive fixing medium has good insulation and thermal conductivity. In this embodiment, providing a thermally conductive fixing medium inside the housing 110 has significant advantages in the following aspects:

[0038] On the one hand, from the perspective of heat conduction, the first heating plate can be thermally connected to at least one battery cell 120 through a thermally conductive fixing medium. The thermal conductivity of the thermally conductive fixing medium ensures that heat can be rapidly conducted from the first heating plate to the battery cell 120. This structural design indirectly increases the heat conduction area between the first heating plate and the battery cell 120, thereby ensuring that the heat exchange between the battery cell 120 and the first heating plate is relatively efficient.

[0039] On the other hand, from the perspective of the stability of the battery cell 120, the design of the thermally conductive fixing medium not only improves the heat transfer efficiency between the first heating element 130 and the battery cell 120, but also provides a certain degree of positioning and fixing for the battery cell 120. Specifically, at least a portion of the thermally conductive fixing medium is filled between the battery cell 120 and the inner wall of the housing 110, thereby forming an effective physical fixing structure. This structural design can effectively prevent the battery cell 120 from shifting during the operation of the battery pack 100, thus ensuring that the battery cell 120 can operate stably.

[0040] Through the design of the thermally conductive fixing medium, the battery pack 100 not only achieves more efficient heat conduction in terms of thermal management, but also provides better support for fixing the battery cells 120. This dual function not only improves the performance of the battery pack 100, but also greatly enhances its reliability and long-term operational stability.

[0041] In some embodiments, please refer to Figure 6 The battery pack 100 includes not only a housing 110, at least one battery cell 120 and a first heating element 130, but also a second heating element 160. The housing 110 includes a side panel 170, and the second heating element 160 is mounted on at least one side panel 170 of the housing 110.

[0042] To ensure the heat transfer efficiency of the second heating element 160, each side panel 170 of the housing 110 can be equipped with at least one second heating element 160. Furthermore, the thickness of the second heating element 160 is typically set between 1.15mm and 2.15mm. Specifically, experimental verification shows that, on the one hand, when the thickness of the second heating element 160 is less than 1.15mm, the heat dissipation rate of the second heating element 160 is faster, resulting in lower heat transfer efficiency and poor heating effect on the battery cell 120, thus affecting the overall performance of the battery pack 100. On the other hand, when the thickness of the second heating element 160 is greater than 2.25mm, the heat transfer efficiency of the second heating element 160 is also lower, causing heat to be unable to be quickly transferred to the battery cell 120. Consequently, the battery cell 120 cannot quickly reach a suitable ambient temperature, resulting in a certain delay in adjusting the temperature of the second heating element 160 through the temperature regulation device.

[0043] Therefore, by limiting the thickness of the second heating element 160 within the above-mentioned range, the conduction and dissipation of heat from the second heating element 160 can be effectively balanced to ensure the response speed of the cell 120 during the heating process, thereby ensuring that the cell 120 can reach the expected operating temperature in a shorter time and ensuring the efficient operation and reliability of the battery pack 100 system.

[0044] In some embodiments, the battery pack 100 includes a housing 110, at least one battery cell 120, and a first heating element 130, as well as a second heating element 160 and a thermally conductive fixing medium. Specifically, at least one battery cell 120 is connected to the second heating element 160 via the thermally conductive fixing medium. The good thermal conductivity of the thermally conductive fixing medium ensures that heat can be rapidly conducted from the second heating plate to the battery cell 120. This structural design indirectly increases the heat conduction area between the second heating plate and the battery cell 120, thereby ensuring more efficient heat exchange between the battery cell 120 and the second heating plate.

[0045] In some embodiments, please refer to Figure 7 , Figure 7 This is a schematic diagram of another battery pack structure provided in this embodiment of the present invention. The battery pack 100 also includes a BMS (Battery Management System) module 180. The functions of the BMS module 180 include, but are not limited to, temperature monitoring, temperature management, and charge / discharge management of the battery cells 120. Specifically, the BMS module 180 is configured to be electrically connected to each battery cell 120 and is responsible for real-time monitoring of the voltage, current, temperature, and other status information of each battery cell 120. In addition, the BMS module 180 can also perform equalization management on the battery pack 100 to ensure that the performance differences of each battery cell 120 in the battery pack are adjusted, thereby extending the service life of the battery pack 100.

[0046] In this embodiment, the BMS module 180 is located outside the housing 110 of the battery pack 100 and is electrically connected to each individual battery cell. This structure facilitates the modular design of the battery pack 100, making maintenance, inspection, and replacement of each component more convenient. Simultaneously, placing the BMS module 180 outside the housing 110 effectively improves the electrical isolation of the battery pack 100. This design ensures that in the event of any electrical fault occurring inside the battery pack 100, the BMS module 180 will not cause electrical hazards to external systems or users, thereby enhancing the safety of the battery pack 100.

[0047] Furthermore, the external layout of the BMS module 180 facilitates the design and implementation of the thermal management system. During the operation of the battery pack 100, individual battery cells may generate significant heat, especially under high-load charging and discharging conditions. Excessive temperature can negatively impact battery performance and lifespan. By placing the BMS module 180 on the outside of the housing 110, external space can be better utilized to integrate an effective temperature control and heat dissipation system, preventing excessively high or low battery temperatures from negatively affecting battery performance.

[0048] In summary, by placing the BMS module 180 on the outside of the housing 110, this embodiment facilitates modular design and maintenance, improves electrical isolation and thermal management, thereby enhancing the overall performance and safety of the battery pack 100.

[0049] In some embodiments, the battery pack 100 housing 110 includes a top plate, and the BMS module 180 is mounted on the outside of the top plate. To ensure that the top plate can withstand the weight of the BMS module 180 and external forces, and to improve the overall structural reliability of the housing 110, a specially designed reinforcing member (not shown in the figures) is provided on the inner side of the top plate of the housing 110. This reinforcing member is designed to enhance the strength of the top plate of the housing 110, enabling it to better resist possible mechanical stresses.

[0050] Reinforcing components can be made of various materials and structural forms, with common choices including steel beams and carbon fiber composites. Steel beams, arranged horizontally and vertically, effectively distribute external pressure, ensuring the top plate does not deform or break during long-term use. Other structural materials, such as aluminum alloy support frames or carbon fiber, due to their lightweight and high strength, can also improve the compressive strength and overall structural stability of the enclosure 110.

[0051] In addition, the reinforcement is located on the inside of the top plate of the housing 110, which can effectively reduce the risk of local deformation or damage to the top plate when subjected to pressure from the BMS module 180. This structural design not only improves the service life of the battery pack 100, but also ensures the safety of the battery pack 100 under high load and extreme environments.

[0052] In summary, the reinforcing members on the inner side of the top plate of the housing 110 not only effectively improve the structural strength of the top plate and reduce the risk of damage caused by the pressure of the BMS module 180, but also ensure the stable operation of the battery pack 100 in various application scenarios.

[0053] It is important to note that the installation position of the BMS module 180 within the battery pack 100 is determined based on different application requirements and space conditions. Specifically, the BMS module 180 can be installed on the top, bottom, or side of the housing 110. The choice of structure typically depends on the specific application scenario and space utilization. For example, when there is sufficient vertical space, i.e., enough available space in the height direction of the battery pack 100, the BMS module 180 can be placed on the top or bottom of the housing 110. When there is sufficient horizontal space, i.e., more available space in the width or length direction of the battery pack 100, the BMS module 180 can be placed on the side of the housing 110. In this case, using the side as an installation position effectively avoids occupying space at the top or bottom of the battery pack 100, providing more space flexibility for other components located at the top or bottom of the battery pack 100.

[0054] This invention provides a battery pack 100, which includes a housing 110, at least one battery cell 120, and a first heating element 130. Both the battery cell 120 and the first heating element 130 are located within the housing 110. The first heating element 130 is adapted to heat the at least one battery cell 120 and to radially limit the position of the at least one battery cell 120. The first heating element 130 in the battery pack 100 provided by this invention not only heats the battery cell 120 to ensure it is in a suitable working environment, but also limits its position, thus achieving functional reuse. Compared with the structure in related technologies that uses end plates to fix the cells 120, this battery pack 100 not only avoids the material cost required for end plates, but also saves space within the battery pack 100, thereby providing more flexibility for the arrangement of the cells 120. This allows more cells 120 to be accommodated in the same volume of the battery pack 100, thereby increasing the energy density of the battery pack 100 and achieving the goal of improving the overall performance of the battery pack 100.

[0055] This utility model also provides an electrical device, which includes, but is not limited to, electric vehicles and energy storage systems. The electrical device includes the aforementioned battery pack 100 and has all the advantages of the aforementioned battery pack 100, which will not be repeated here.

[0056] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body; at least one battery cell located in the box body; and a first heating member located in the box body; wherein the first heating member is adapted to heat the at least one battery cell and to limit the at least one battery cell in a radial direction of the at least one battery cell. The first heating member is a silica gel heating film.

2. The battery pack of claim 1, wherein, The first heating member is provided with at least one limiting groove, each limiting groove being adapted to limit the battery cell in a radial direction of the corresponding battery cell; wherein the first heating member satisfies the condition: 1.15mm≤d≤2.15mm; wherein d is the thickness of the first heating member.

3. The battery pack of claim 1, wherein, The battery pack further comprises an integrated busbar, which abuts against the at least one battery cell in the box body towards the first heating member.

4. The battery pack of claim 1, wherein, The box body is further provided with a heat-conducting fixing medium, and the at least one battery cell is connected to the box body through the heat-conducting fixing medium.

5. The battery pack of claim 1, wherein, The battery pack further comprises a second heating member, and the box body comprises a side plate; wherein the second heating member is mounted on the side plate of the box body.

6. The battery pack of claim 1, wherein, The box body is further provided with a heat-conducting fixing medium, and the at least one battery cell is connected to the second heating member through the heat-conducting fixing medium.

7. The battery pack of claim 6, wherein, The battery pack further comprises a BMS module, which is configured to be electrically connected to each battery cell; wherein the BMS module is located outside the box body.

8. The battery pack of any one of claims 1-7, wherein, The box body comprises a top plate, and the inner side of the top plate is provided with a reinforcing member; wherein the BMS module is mounted on the outer side of the top plate.

9. The battery pack of claim 8, wherein, The battery pack comprises the battery pack according to any one of claims 1-9.

10. An electric device, characterized by The battery pack comprises the battery pack according to any one of claims 1-9.

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