Battery box and battery pack
By designing the central cells in the battery box to directly contact the cooling plate, and reducing the contact area of the edge cells, the problem of large temperature differences in the battery system is solved, thereby improving the uniformity of cell temperature and safety.
Patent Information
- Application Number
- CN202520039285.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-08
AI Technical Summary
In existing technologies, the large temperature difference between the edge cells and the inner cells leads to uneven battery system performance and shortened lifespan, posing a risk of thermal runaway.
Design a battery box structure in which the central cells are in direct contact with the cooling plate, while the edge cells have reduced contact area with the cooling plate. Heat exchange is achieved through a liquid cooling plate assembly, and thermal pads and end plates provide stable support. A fireproof plate prevents thermal runaway.
It effectively balances the temperature distribution of the battery cells, reduces temperature differences, extends the lifespan of the battery cells, improves the stability and safety of the battery system, and reduces the risk of thermal runaway.
Smart Images
Figure CN223911717U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery module cooling technical field especially relates to a battery box and battery package. BACKGROUND
[0002] In modern electric vehicles and energy storage systems, battery packs as the core components of energy storage, their design is crucial to the overall performance of the system. The battery cells are usually closely arranged in an array form inside the battery pack to improve energy density and space utilization. In order to achieve effective thermal management, the bottom of the battery cell is usually in close contact with the cooling system (such as a heat sink or liquid cooling pipe), and the heat generated by the battery cell is transferred out through heat exchange to ensure that the battery system works within the appropriate temperature range.
[0003] Although the arrangement of battery cells in the battery pack appears uniform, the heat dissipation characteristics of the edge battery cells are significantly different from those of the internal battery cells. The heat exchange area of the bottom of the edge battery cells is basically the same as that of other battery cells, and the battery cells located at the edge of the battery pack dissipate heat faster, especially the part of the bottom close to the end plate, which has a more significant heat dissipation effect compared to internal battery cells. This phenomenon is mainly due to the relatively short and direct heat conduction path between the edge battery cells and the end plate, which reduces the thermal resistance in the heat transfer process, allowing heat to be more efficiently transferred to the end plate. In addition, the end plate, as an important component of the battery pack, is usually designed with a large heat dissipation area, an optimized heat dissipation structure, or the use of materials with good thermal conductivity, which further enhances the heat dissipation effect of the edge battery cells. In some cases, the end plate may be directly in contact with the external air or cooling medium, providing an additional heat dissipation path and further reducing the temperature of the edge battery cells, making the edge battery cells the lowest temperature point in the battery system, resulting in a large temperature difference in the battery system, affecting the performance of the battery cells and reducing the service life.
[0004] The electrochemical performance of the battery is closely related to the temperature. Due to the lower temperature, the reaction rate of the active material of the edge battery cell is slowed down, and the internal resistance is relatively reduced. Although it may exhibit better discharge efficiency in the short term, it may lead to uneven decay of battery capacity in long-term operation. On the contrary, due to the high temperature of the internal battery cell, the consumption of active material is accelerated, the internal resistance is increased, the discharge efficiency is reduced, and even the risk of thermal runaway may be triggered, affecting the overall performance of the battery system. The thermal stress and chemical reaction rate difference caused by the temperature difference accelerate the degradation of the internal structure of the battery cell, such as active material shedding and electrolyte decomposition, thereby shortening the service life of the battery. The temperature difference may also trigger the risk of thermal runaway between the battery cells, causing local overheating of the battery system, and even causing fire or explosion accidents. SUMMARY
[0005] In view of the above-mentioned prior art defects, the technical problem to be solved by the utility model is to provide a battery box and a battery pack for solving the technical problem of large temperature difference of a battery system caused by the fact that the heat exchange area of the bottom of the edge cell is basically consistent with that of other cells.
[0006] To achieve the above-mentioned purpose, the utility model provides a battery box, which comprises:
[0007] The cell module comprises a first edge cell, a second edge cell and a plurality of middle cells arranged between the first edge cell and the second edge cell.
[0008] The liquid cooling plate assembly is arranged at the bottom of the cell module; the liquid cooling plate assembly comprises a first cooling plate, a second cooling plate and a third cooling plate, both ends of the second cooling plate are connected with the first cooling plate and the third cooling plate respectively; the second cooling plate is provided with a main flow channel for the circulation of cooling liquid, and the main flow channel is used for heat exchange of the cell module.
[0009] The middle cells are arranged above the second cooling plate, and the bottom of the middle cell is in contact with the top of the second cooling plate; the first edge cell is arranged above the edge joint of the first cooling plate and the second cooling plate, and the bottom of the first edge cell is in contact with the top of the first cooling plate and the top of the second cooling plate respectively, so as to reduce the heat exchange area of the bottom of the first edge cell; the second edge cell is arranged above the edge joint of the second cooling plate and the third cooling plate, and the bottom of the second edge cell is in contact with the top of the second cooling plate and the top of the third cooling plate respectively, so as to reduce the heat exchange area of the bottom of the second edge cell.
[0010] As a preferred mode, the utility model also comprises a box shell, the box shell is provided with a battery accommodating cavity for accommodating the cell module, and the box shell is covered on the cell module and connected with the liquid cooling plate assembly. In this way, the box shell can prevent the cell module from being invaded by water, dust, foreign matters and the like.
[0011] As a preferred mode, the utility model also comprises a first end plate and a second end plate, the first end plate is arranged on the first cooling plate and abuts against the first edge cell; the second end plate is arranged on the third cooling plate and abuts against the second edge cell. In this way, the first end plate and the second end plate provide a stable support surface, so that the first edge cell, the second edge cell and the middle cells are extruded together to form a complete cell module.
[0012] As a preferred mode, the liquid cooling plate assembly further comprises a water inlet nozzle and a water outlet nozzle arranged on the first cooling plate, the water inlet nozzle and the water outlet nozzle are respectively communicated with the main flow channel, and the cooling liquid enters the main flow channel from the water inlet nozzle and exchanges heat with the battery cell module and then flows out from the water outlet nozzle.
[0013] As a preferred mode, the first cooling plate is provided with a water inlet flow channel and a water outlet flow channel, the water inlet nozzle is communicated with the main flow channel through one end of the water inlet flow channel, and the water outlet nozzle is communicated with the main flow channel through one end of the water outlet flow channel; the cooling liquid enters the water inlet flow channel from the water inlet nozzle, flows through the main flow channel, and then flows out from the water outlet nozzle through the water outlet flow channel.
[0014] As a preferred mode, the liquid cooling plate assembly further comprises a plug arranged on the first cooling plate, and the plug is arranged at the other end of the water inlet flow channel and the water outlet flow channel. In this way, the plug is used to seal the water inlet flow channel and the water outlet flow channel to prevent the cooling liquid from leaking.
[0015] As a preferred mode, a fireproof plate is further included, and the fireproof plate is arranged between the battery accommodating cavity and the battery cell module. In this way, the fireproof plate is used for protection and fire prevention of the battery module to prevent the spread of flames and the diffusion of heat when the battery module is in thermal runaway.
[0016] As a preferred mode, a sealing gasket is further included, and the sealing gasket is arranged in the battery accommodating cavity and is used to seal the gap between the battery accommodating cavity and the battery cell module. In this way, the sealing performance is improved, external impurities are prevented from entering the box shell, the internal electrical elements are prevented from being disturbed, and the service life is affected.
[0017] As a preferred mode, a heat-conducting pad is further included, and the heat-conducting pad is arranged between the liquid cooling plate assembly and the battery cell module. In this way, the heat-conducting pad can fill the small gaps between the battery cell module and the second cooling plate, increase the contact area therebetween, and enable the heat generated by the battery cell module to be transmitted to the second cooling plate more quickly.
[0018] The utility model further provides a battery pack, which comprises:
[0019] A fixed frame;
[0020] One or more battery boxes as described above are arranged on the fixed frame.
[0021] As described above, the battery box and the battery pack have the following beneficial effects:
[0022] The utility model discloses a battery box, the middle part electric core of each is directly arranged above the second cooling plate, and the bottom of each middle part electric core is in contact with the top of the second cooling plate, and the cooling liquid of main flow passage is fully utilized to exchange heat, and the efficient heat dissipation of middle part electric core is ensured. The first edge electric core is arranged above the junction edge of the first cooling plate and the second cooling plate, and the bottom of the first edge electric core is in contact with the top of the first cooling plate and the second cooling plate respectively, the second edge electric core is arranged above the junction edge of the second cooling plate and the third cooling plate, and the bottom of the second edge electric core is in contact with the top of the second cooling plate and the third cooling plate respectively, thereby reducing the direct contact area of the bottom of the first edge electric core, the bottom of the second edge electric core and the cooling liquid circulating in the main flow passage, and further reducing the heat exchange area of the bottom of the first edge electric core and the bottom of the second edge electric core, reducing the heat dissipation amount of the first edge electric core and the second edge electric core, making the temperature of the first edge electric core and the second edge electric core more close to the temperature of the middle part electric core, effectively balancing the temperature distribution in the electric core module, reducing the temperature difference of the battery system, helping to reduce the thermal stress of the electric core caused by the temperature difference, making the electric core module work under more uniform temperature, prolonging the service life of the whole electric core module, helping the electric core module to exert the best performance, and improving the overall stability and reliability of the electric core module.
[0023] The utility model discloses a battery pack, a plurality of battery boxes are arranged on the fixed frame respectively, and each battery box is an independent module, which is convenient to assemble, disassemble and maintain, and the capacity of the battery pack is improved. Moreover, by reducing the heat exchange area of the bottom of the edge electric core, the heat dissipation rate of the edge electric core is reduced, the temperature gradient in the battery pack is reduced, the temperature uniformity is improved, the performance degradation of the battery pack caused by temperature fluctuation is reduced, the service life of the battery pack is prolonged, the risk of thermal runaway of the battery pack under extreme conditions is reduced, and the safety of the system is improved.
[0024] The utility model discloses a battery box and battery pack, by reducing the heat exchange area of the bottom of the first edge electric core, the bottom of the second edge electric core and the cooling liquid circulating in the main flow passage, reducing the heat dissipation amount of the first edge electric core and the second edge electric core, making the temperature of the first edge electric core and the second edge electric core more close to the temperature of the middle part electric core, effectively balancing the temperature distribution in the electric core module, reducing the temperature difference of the battery system, prolonging the service life of the electric core and improving the system performance. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is shown as the structure schematic diagram of the battery box in the utility model.
[0026] Figure 2 It is shown as another structure schematic diagram of the battery box in the utility model.
[0027] Figure 3An exploded view of the battery box is shown in the utility model.
[0028] Figure 4 An assembly view of the battery box is shown in the utility model.
[0029] Figure 5 A partial structure schematic view of the battery box is shown in the utility model.
[0030] Element number explanation
[0031] 1 cell module
[0032] 11 first edge cell
[0033] 12 second edge cell
[0034] 13 middle cell
[0035] 2 liquid cooling plate assembly
[0036] 21 first cooling plate
[0037] 211 water inlet flow channel
[0038] 212 water outlet flow channel
[0039] 22 second cooling plate
[0040] 221 main flow channel
[0041] 23 third cooling plate
[0042] 24 water inlet nozzle
[0043] 25 water outlet nozzle
[0044] 26 plug
[0045] 3 box body shell
[0046] 4 first end plate
[0047] 5 second end plate
[0048] 6 end plate mounting beam Specific embodiments
[0049] The following specific embodiments illustrate the implementation of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.
[0050] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings accompanying the present specification are merely intended to assist understanding of the content disclosed in the specification, to be understood and read by those skilled in the art, and are not intended to limit the conditions under which the present application can be implemented, and therefore do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application. The following detailed description should not be considered limiting, and the scope of the embodiments of the present application is limited only by the claims of the published patent. The terms used herein are only intended to describe the specific embodiments, and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "under", "bottom", "above", "top", etc., can be used in the specification to facilitate the description of the relationship between one element or feature shown in the drawings and another element or feature.
[0051] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "holding" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0052] Furthermore, as used in this document, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the terms "comprise", "comprising", "include", "including" and / or "contain", "containing" indicate the presence of the stated features, operations, elements, components, items, categories, and / or groups, but do not exclude the presence or addition of one or more other features, operations, elements, components, items, categories, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions or operations is inherently mutually exclusive in some way, will there be an exception to this definition.
[0053] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the embodiments of the present application is further described in detail in the following embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only intended to explain the present application, and are not intended to limit the application.
[0054] As Figures 1-5The utility model provides a battery box, including:
[0055] The battery box further includes a plurality of electric core modules 1.
[0056] The battery box further includes a liquid cooling plate assembly 2.
[0057] The liquid cooling plate assembly 2 is arranged at the bottom of the electric core module 1, and includes a first cooling plate 21, a second cooling plate 22 and a third cooling plate 23.
[0058] The battery box of the utility model, directly setting each middle cell 13 above the second cooling plate 22, the bottom of each middle cell 13 is in contact with the top of the second cooling plate 22, fully utilizes the cooling liquid of main runner 221 to exchange heat, ensures the high -efficient heat dissipation of middle cell 13. The first edge cell 11 is set above the junction edge of the first cooling plate 21 and the second cooling plate 22, and the bottom of the first edge cell 11 is in contact with the top of the first cooling plate 21 and the second cooling plate 22 respectively, the second edge cell 12 is set above the junction edge of the second cooling plate 22 and the third cooling plate 23, and the bottom of the second edge cell 12 is in contact with the top of the second cooling plate 22 and the third cooling plate 23 respectively, thereby reducing the direct contact area of the bottom of the first edge cell 11, the bottom of the second edge cell 12 and the cooling liquid circulating in the main runner 221, and further reducing the heat exchange area of the bottom of the first edge cell 11 and the bottom of the second edge cell 12, reducing the heat dissipation of the first edge cell 11 and the second edge cell 12, making the temperature more close to the middle cell 13, effectively balancing the temperature distribution in the cell module 1, reducing the temperature difference of the battery system, helping to reduce the thermal stress of the cell due to temperature difference, making the cell module 1 work under more uniform temperature, prolonging the service life of the whole cell module 1, helping the cell module 1 to play the best performance, improving the overall stability and reliability of the cell module 1.
[0059] It is worth mentioning that the battery box of the utility model can adjust the heat exchange area of the bottom of the first edge cell 11, the bottom of the second edge cell 12 and the cooling liquid by adjusting the contact area of the bottom of the first edge cell 11 with the top of the first cooling plate 21 and the second cooling plate 22 respectively and the contact area of the bottom of the second edge cell 12 with the top of the second cooling plate 22 and the third cooling plate 23 respectively, so as to realize the adjustment of the temperature of the edge cell, reduce the temperature difference between the edge cell and the middle cell 13, reduce the system temperature difference, prolong the service life of the cell and improve the system performance.
[0060] In the embodiment, as shown in the figure, Figures 1-5 The first cooling plate 21, the second cooling plate 22 and the third cooling plate 23 include but are not limited to profiled cold plate, stamping cold plate, harmonica tube, blowing plate, die-casting integrated cold plate, straight cold plate, etc. The first cooling plate 21, the second cooling plate 22 and the third cooling plate 23 are connected by welding process.
[0061] In the embodiment, as shown in the figure, Figures 2-4As shown, the battery box further comprises a box shell 3, a battery accommodating cavity for accommodating the battery cell module 1 is arranged in the box shell 3, the box shell 3 covers the battery cell module 1 and is connected with the liquid cooling plate assembly 2. The box shell 3 can prevent the battery cell module 1 from being invaded by moisture, dust, foreign matters and the like, thereby ensuring the normal work and long-term stability of the battery cell module 1.
[0062] In the embodiment, as shown in the figure, Figures 1-3 The battery box further comprises a first end plate 4 and a second end plate 5, the first end plate 4 is arranged on the first cooling plate 21 and abuts against the first edge battery cell 11, and the second end plate 5 is arranged on the third cooling plate 23 and abuts against the second edge battery cell 12. The first end plate 4 and the second end plate 5 are located in the battery accommodating cavity in the box shell 3 together with the battery cell module 1.
[0063] In the embodiment, as shown in the figure, Figures 1-3 The battery box further comprises two end plate mounting beams 6, the first end plate 4 and the second end plate 5 are fixed on the first cooling plate 21 and the third cooling plate 23 respectively through the end plate mounting beams 6.
[0064] In the embodiment, as shown in the figure, Figures 1-3 The first end plate 4 abuts against the first edge battery cell 11 and the second end plate 5 abuts against the second edge battery cell 12, thereby providing a stable support surface, so that the first edge battery cell 11, the second edge battery cell 12 and the middle battery cell 13 are extruded together to form a complete battery cell module 1, thereby ensuring that the battery cell module 1 can maintain a correct position and shape and preventing movement or deformation in the use process.
[0065] In the embodiment, as shown in the figure, Figures 1-4 The liquid cooling plate assembly 2 further comprises a water inlet nozzle 24 and a water outlet nozzle 25 arranged on the first cooling plate 21, the water inlet nozzle 24 and the water outlet nozzle 25 are respectively communicated with the main flow channel 221, cooling liquid enters the main flow channel 221 from the water inlet nozzle 24 and exchanges heat with the battery cell module 1, and then flows out from the water outlet nozzle 25. The water inlet nozzle 24 and the water outlet nozzle 25 are communicated through the main flow channel 221 in the second cooling plate 22, cooling liquid enters from the water inlet nozzle 24, flows through the main flow channel 221 in the second cooling plate 22 and then flows out from the water outlet nozzle 25, thereby forming a complete closed loop pipeline circulation with only one inlet and one outlet.
[0066] In the embodiment, as shown in the figure, Figure 5As shown, the first cooling plate 21 is provided with an inlet flow channel 211 and an outlet flow channel 212, the inlet nozzle 24 is connected to the main flow channel 221 through one end of the inlet flow channel 211, and the outlet nozzle 25 is connected to the main flow channel 221 through one end of the outlet flow channel 212; the cooling liquid enters the inlet flow channel 211 through the inlet nozzle 24, flows through the main flow channel 221, and then flows out of the outlet nozzle 25 through the outlet flow channel 212. The inlet nozzle 24 is connected to the inlet flow channel 211, and the outlet nozzle 25 is connected to the outlet flow channel 212. One end of the inlet flow channel 211 is connected to the main flow channel 221, and one end of the outlet flow channel 212 is connected to the main flow channel 221.
[0067] In this embodiment, as shown in Figure 1 、 4 , 5, the inlet nozzle 24 is the inlet of the cooling liquid, and the cooling liquid enters the inlet flow channel 211 through the inlet nozzle 24 and then flows into the main flow channel 221. The main flow channel 221 is the main flow path for heat exchange between the cooling liquid and the battery cell module 1, so as to ensure that the cooling liquid can fully exchange heat with the battery cell module 1 and absorb the heat generated by the battery cell module 1. The cooling liquid after heat exchange flows from the main flow channel 221 into the outlet flow channel 212 and then flows out through the outlet nozzle 25. The second cooling plate 22 transmits the heat generated by the battery cell module 1 when working by contacting the surface, and then the cooling liquid in the internal main flow channel 221 carries away the heat. Since the bottom of the first edge battery cell 11 respectively contacts the top of the first cooling plate 21 and the second cooling plate 22, and the bottom of the second edge battery cell 12 respectively contacts the top of the second cooling plate 22 and the third cooling plate 23, the heat exchange area between the bottom of the first edge battery cell 11, the bottom of the second edge battery cell 12 and the cooling liquid in the main flow channel 221 is reduced, the temperature difference between the edge battery cells and the middle battery cell 13 is reduced, so that the battery cell module 1 works in a suitable temperature range, and the performance and service life of the battery cell module 1 are ensured.
[0068] In this embodiment, as shown in Figure 1 、 3 , 4, 5, the liquid cooling plate assembly 2 further comprises a plug 26 arranged on the first cooling plate 21, and the plug 26 is arranged at the other end of the inlet flow channel 211 and the outlet flow channel 212, respectively. The plug 26 is used to close the inlet flow channel 211 and the outlet flow channel 212 to prevent leakage of the cooling liquid.
[0069] In the embodiment, the battery box further comprises a fireproof plate arranged between the battery accommodating cavity and the battery cell module 1. The fireproof plate is used for protection and fireproofing of the battery module to prevent the spread of flames and the diffusion of heat when the battery module is in thermal runaway. The fireproof plate generally has excellent heat resistance, flame retardance and electrical insulation, and can remain stable under extreme conditions, thereby providing additional safety assurance for the battery system.
[0070] In the embodiment, the battery box further comprises a sealing gasket arranged in the battery accommodating cavity, which is used to seal the gap between the battery accommodating cavity and the battery cell module 1. In this way, the sealing performance is improved, external impurities are prevented from entering the box shell 3, the internal electrical elements are prevented from being disturbed, and the service life is affected.
[0071] In the embodiment, the battery box further comprises a heat-conducting pad arranged between the liquid cooling plate assembly 2 and the battery cell module 1. The heat-conducting pad can fill the small gaps between the battery cell module 1 and the second cooling plate 22, increase the contact area therebetween, and enable the heat generated by the battery cell module 1 to be transferred to the second cooling plate 22 more quickly. In this way, the main flow channel 221 on the second cooling plate 22 can more effectively perform heat exchange on the battery cell module 1, ensure that the battery cell module 1 works in an appropriate temperature range, and prevent performance degradation or safety problems caused by overheating or uneven temperature.
[0072] The utility model provides a kind of battery pack, comprising:
[0073] Fixed frame;
[0074] One or more battery boxes as described above are arranged on the fixed frame.
[0075] The battery pack of the utility model arranges multiple battery boxes on the fixed frame, and each battery box is an independent module, which is convenient for assembly, disassembly and maintenance, and improves the capacity of the battery pack. By reducing the heat exchange area of the edge cell bottom, the heat dissipation rate of the edge cell is reduced, which helps to reduce the temperature gradient inside the battery pack, improve temperature uniformity, reduce performance degradation caused by temperature fluctuations of the battery pack, thereby prolonging the service life of the battery pack, reducing the risk of thermal runaway of the battery pack under extreme conditions, and improving the safety of the system.
[0076] In the embodiment, the liquid cooling plate assembly 2 is provided with a fixing part connected with the fixing frame, and the battery box is arranged on the fixing frame through the fixing part.
[0077] In summary, the battery box and the battery pack effectively overcome the shortcomings in the prior art and have high industrial utilization value.
[0078] The above embodiment only illustrates the principle and effect of the utility model, and is not used to limit the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. A battery box characterized by, The application relates to a battery pack, which comprises the following parts: an electric core module (1) comprising a first edge electric core (11), a second edge electric core (12) and a plurality of middle electric cores (13) arranged between the first edge electric core (11) and the second edge electric core (12); a liquid cooling plate assembly (2) arranged at the bottom of the electric core module (1); the liquid cooling plate assembly (2) comprises a first cooling plate (21), a second cooling plate (22) and a third cooling plate (23), the two ends of the second cooling plate (22) are connected with the first cooling plate (21) and the third cooling plate (23) respectively, and the second cooling plate (22) is provided with a main flow channel (221) for the circulation of cooling liquid, which is used for heat exchange of the electric core module (1); wherein the middle electric cores (13) are arranged above the second cooling plate (22), and the bottom of the middle electric cores (13) is in contact with the top of the second cooling plate (22); the first edge electric core (11) is arranged above the edge joint of the first cooling plate (21) and the second cooling plate (22), and the bottom of the first edge electric core (11) is in contact with the top of the first cooling plate (21) and the second cooling plate (22) respectively, so as to reduce the heat exchange area of the bottom of the first edge electric core (11); the second edge electric core (12) is arranged above the edge joint of the second cooling plate (22) and the third cooling plate (23), and the bottom of the second edge electric core (12) is in contact with the top of the second cooling plate (22) and the third cooling plate (23) respectively, so as to reduce the heat exchange area of the bottom of the second edge electric core (12).
2. The battery pack of claim 1, wherein, The application further comprises a box shell (3) provided with a battery accommodating cavity for accommodating the electric core module (1), the box shell (3) is covered on the electric core module (1) and connected with the liquid cooling plate assembly (2).
3. The battery pack of claim 1, wherein, The application further comprises a first end plate (4) and a second end plate (5), the first end plate (4) is arranged on the first cooling plate (21) and abuts against the first edge electric core (11); the second end plate (5) is arranged on the third cooling plate (23) and abuts against the second edge electric core (12).
4. The battery pack of claim 1, wherein, The liquid cooling plate assembly (2) further comprises a water inlet nozzle (24) and a water outlet nozzle (25) arranged on the first cooling plate (21), the water inlet nozzle (24) and the water outlet nozzle (25) are communicated with the main flow channel (221) respectively, cooling liquid enters the main flow channel (221) from the water inlet nozzle (24) and exchanges heat with the electric core module (1), and then flows out from the water outlet nozzle (25).
5. The battery pack of claim 4, wherein, The first cooling plate (21) is provided with a water inlet flow channel (211) and a water outlet flow channel (212), one end of the water inlet nozzle (24) is communicated with the main flow channel (221) through the water inlet flow channel (211), and one end of the water outlet nozzle (25) is communicated with the main flow channel (221) through the water outlet flow channel (212). The cooling liquid enters the water inlet flow channel (211) from the water inlet nozzle (24), flows through the main flow channel (221), and then flows out from the water outlet nozzle (25) through the water outlet flow channel (212).
6. The battery pack of claim 5, wherein, The liquid cooling plate assembly (2) further comprises plugs (26) arranged on the first cooling plate (21), the plugs (26) being arranged at the other ends of the water inlet flow channel (211) and the water outlet flow channel (212) respectively.
7. The battery pack of claim 2, wherein, Further comprising a fireproof plate arranged between the battery accommodating cavity and the battery cell module (1).
8. The battery pack of claim 2, wherein, Further comprising a sealing gasket arranged in the battery accommodating cavity, the sealing gasket being used to seal the gap between the battery accommodating cavity and the battery cell module (1).
9. The battery pack of claim 1, wherein, Further comprising a heat-conducting pad arranged between the liquid cooling plate assembly (2) and the battery cell module (1).
10. A battery pack, characterized by, Comprise: a fixed frame; one or more battery boxes as claimed in any one of claims 1-9, each of the battery boxes being arranged on the fixed frame respectively.