Air-cooled lithium battery pack

Abstract

The utility model provides an air-cooled lithium battery pack, relates to lithium battery technical field, including lithium battery module, air-cooled module, box cover and box body, the lithium battery module is provided in the accommodation chamber that the box cover and the box body cooperate to form, the box body is provided with air inlet and air outlet, the air outlet is provided with air inlet and air outlet. The containing cavity is communicated with the outside of the box body through the air inlet and the air outlet, and the air cooling module is arranged at at least one of the air inlet and the air outlet. Therefore, air outside the box body can enter the box body through the air inlet, heat generated when the lithium battery module works can be discharged from the air outlet through air flow, and the air cooling module arranged at the air inlet and / or the air outlet accelerates the air circulation efficiency in the accommodating cavity; therefore, the heat dissipation effect of the lithium battery in the charging and discharging process is improved, and the situation that the temperature of the lithium battery module rises due to heat accumulation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to an air-cooled lithium battery pack. Background Art

[0002] Renewable energy power generation is not only an important way to achieve ecological civilization and sustainable development goals, but also a key component of modern energy system construction. However, the output characteristics of new energy are random and volatile due to the influence of the natural environment, and the power grid needs to adjust the power grid according to the output power of the generator set and the power demand to maintain a stable frequency operation. While putting forward higher requirements on the regulation capacity of the power system, it also promotes the development of energy storage systems.

[0003] However, in existing energy storage systems, lithium batteries have poor heat dissipation during the charging and discharging process, which easily leads to heat accumulation and increases the internal temperature of the battery, affecting the normal use of the lithium battery pack. Utility Model Content

[0004] The main purpose of the utility model is to provide an air-cooled lithium battery pack, aiming to solve the problem of poor heat dissipation of the lithium battery during the charging and discharging process.

[0005] To achieve the above-mentioned purpose, the utility model provides an air-cooled lithium battery pack, including a lithium battery module, an air cooling module, a box cover and a box body, the lithium battery module is arranged in a accommodating cavity formed by the box cover and the box body, the box body is provided with an air inlet and an air outlet, the accommodating cavity is connected to the outside of the box body through the air inlet and the air outlet, and the air cooling module is arranged at at least one position between the air inlet and the air outlet.

[0006] Optionally, a control module is further included, the control module is electrically connected to the lithium battery module, and the control module is electrically connected to the air cooling module, and the control module controls the output power of the air cooling module according to the collected temperature of the lithium battery module.

[0007] Optionally, a accommodating groove is provided on a side plate of the box body, a space formed by the accommodating groove is located in the accommodating cavity, and the control module is arranged in the accommodating groove.

[0008] Optionally, the control module and the air cooling module are located on the same side panel of the box body, and a wiring channel is set on the box body near the control module. The wiring channel runs through the box cover and the box body, and the control module is electrically connected to the wiring harness in the wiring channel.

[0009] Optionally, the lithium battery module includes a first lithium battery module and a second lithium battery module, the first lithium battery module and the second lithium battery module are arranged in the accommodating cavity at intervals, and the air inlet and the air outlet are connected through the interval area between the first lithium battery module and the second lithium battery module.

[0010] Optionally, the box body includes a bottom plate and a first side panel, a second side panel, a third side panel and a fourth side panel arranged around the bottom plate, the bottom plate is arranged opposite to the box cover, the air outlet is arranged on the first side panel, the air inlet is arranged on the second side panel, the first side panel and the second side panel are arranged opposite to each other, and the third side panel and the fourth side panel are arranged opposite to each other.

[0011] Optionally, the air cooling module is arranged at the air outlet position, the size of the air outlet matches the size of the air cooling module, and the air inlet includes a plurality of long strip through-hole structures arranged in an array.

[0012] Optionally, the third side panel and the fourth side panel are respectively provided with air guide ports.

[0013] Optionally, the air guide port includes a plurality of circular through-hole structures arranged in an array.

[0014] Optionally, a handle structure is also provided on the first side panel.

[0015] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0016] The utility model provides an air-cooled lithium battery pack, including a lithium battery module, an air-cooling module, a box cover and a box body, wherein the lithium battery module is arranged in a receiving cavity formed by the cooperation of the box cover and the box body, an air inlet and an air outlet are provided on the box body, the receiving cavity is connected with the outside of the box body through the air inlet and the air outlet, and the air-cooling module is arranged at at least one of the air inlet and the air outlet. In the embodiment of the utility model, the air outside the box body can enter the inside of the box body through the air inlet, and the heat generated by the lithium battery module when working can be discharged from the air outlet through the flow of air, and the air-cooling module arranged at the air inlet and / or the air outlet accelerates the efficiency of air circulation in the receiving cavity, thereby improving the heat dissipation effect of the lithium battery during the charging and discharging process, and reducing the situation where the temperature of the lithium battery module increases due to heat accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of an air-cooled lithium battery pack provided by an embodiment of the utility model;

[0019] Figure 2 This is the second structural schematic diagram of an air-cooled lithium battery pack provided by an embodiment of the utility model;

[0020] Figure 3 This is the third structural schematic diagram of an air-cooled lithium battery pack provided by an embodiment of the utility model;

[0021] Figure 4 This is the fourth structural schematic diagram of an air-cooled lithium battery pack provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0022] All technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0025] The utility model provides an air-cooled lithium battery pack, such as Figures 1 to 4 As shown, it includes a lithium battery module 10, an air cooling module 20, a box cover 30 and a box body 40. The lithium battery module 10 is arranged in a receiving cavity formed by the box cover 30 and the box body 40. An air inlet 41 and an air outlet 42 are provided on the box body 40. The receiving cavity is connected to the outside of the box body 40 through the air inlet 41 and the air outlet 42. The air cooling module 20 is arranged at at least one position of the air inlet 41 and the air outlet 42.

[0026] In one embodiment, if Figure 1As shown, an air outlet 42 matching the size of the air cooling module 20 is provided on one side panel of the box 40, so that the air cooling module 20 can be embedded in the air outlet 42, and an air inlet 41 with a through-hole structure is provided on the other side panel of the box 40. The air outside the box 40 can enter the inside of the box 40 through the air inlet 41, and the heat generated by the lithium battery module 10 during operation can be discharged from the air outlet 42 through the flow of air. The air cooling module 20 provided at the air outlet 42 speeds up the efficiency of air discharge in the accommodating cavity, thereby improving the heat dissipation effect of the lithium battery during the charging and discharging process, and reducing the situation where the temperature of the lithium battery module 10 increases due to heat accumulation.

[0027] In another embodiment, an air inlet 41 matching the size of the air cooling module 20 is provided on one side panel of the box 40, so that the air cooling module 20 can be embedded in the air inlet 41, and an air outlet 42 with a through-hole structure is provided on the other side panel of the box 40. The air outside the box 40 can enter the inside of the box 40 through the air inlet 41, and the heat generated by the lithium battery module 10 during operation can be discharged from the air outlet 42 through the flow of air. The air cooling module 20 provided at the air inlet 41 speeds up the efficiency of air introduction into the accommodating cavity, thereby improving the heat dissipation effect of the lithium battery during the charging and discharging process, and reducing the situation where the temperature of the lithium battery module 10 increases due to heat accumulation.

[0028] In another embodiment, an air inlet 41 matching the size of the air cooling module 20 is provided on one side panel of the box 40, an air outlet 42 matching the size of the air cooling module 20 is provided on the other side panel of the box 40, and an air cooling module 20 is respectively embedded at the air inlet 41 and the air outlet 42. The air outside the box 40 can enter the inside of the box 40 through the air inlet 41, and the heat generated by the lithium battery module 10 during operation can be discharged from the air outlet 42 through the flow of air. The air cooling module 20 arranged at the air inlet 41 speeds up the efficiency of introducing air into the accommodating cavity, and the air cooling module 20 arranged at the air outlet 42 speeds up the efficiency of discharging air from the accommodating cavity, thereby further improving the heat dissipation effect of the lithium battery during the charging and discharging process, and reducing the situation where the temperature of the lithium battery module 10 increases due to heat accumulation.

[0029] In the embodiment of the utility model, an air-cooled lithium battery pack is provided, comprising a lithium battery module 10, an air-cooling module 20, a box cover 30 and a box body 40. The lithium battery module 10 is arranged in a receiving cavity formed by the box cover 30 and the box body 40. An air inlet 41 and an air outlet 42 are provided on the box body 40. The receiving cavity is connected to the outside of the box body 40 through the air inlet 41 and the air outlet 42. The air-cooling module 20 is arranged at at least one of the air inlet 41 and the air outlet 42. The air outside the box body 40 can enter the inside of the box body 40 through the air inlet 41. The heat generated by the lithium battery module 10 during operation can be discharged from the air outlet 42 through the flow of air. The air-cooling module 20 arranged at the air inlet 41 and / or the air outlet 42 accelerates the efficiency of air circulation in the receiving cavity, thereby improving the heat dissipation effect of the lithium battery during the charging and discharging process, and reducing the situation where the temperature of the lithium battery module 10 increases due to heat accumulation.

[0030] Optionally, a control module 50 is further included, the control module 50 is electrically connected to the lithium battery module 10, and the control module 50 is electrically connected to the air cooling module 20, and the control module 50 controls the output power of the air cooling module 20 according to the collected temperature of the lithium battery module 10.

[0031] In this embodiment, a temperature sensor is built into the lithium battery module 10, and the control module 50 is electrically connected to the lithium battery module 10 through a sampling line to collect the temperature information of the lithium battery module 10 in real time. The control module 50 can control the output power of the air cooling module 20 according to the collected temperature of the lithium battery module 10, so that the output power of the air cooling module 20 is proportional to the temperature of the lithium battery module 10. Specifically, when the temperature of the lithium battery module 10 collected is in the temperature range of T0 to T1, the control module 50 controls the output power of the air cooling module 20 to be P1; when the temperature of the lithium battery module 10 collected is in the temperature range of T2 to T3, the control module 50 controls the output power of the air cooling module 20 to be P2; when the temperature of the lithium battery module 10 collected is in the temperature range of T4 to T5, the control module 50 controls the output power of the air cooling module 20 to be P3. Wherein, T0<T1≤T2<T3≤T4<T5, P1<P2<P3. In this way, the control module 50 controls the output power of the air cooling module 20 according to the collected temperature of the lithium battery module 10, thereby reducing the situation where the output power of the air cooling module 20 is large when the temperature of the lithium battery module 10 is low, resulting in energy waste, and reducing the situation where the output power of the air cooling module 20 is small when the temperature of the lithium battery module 10 is high, resulting in poor heat dissipation effect. Controlling the output power of the air cooling module 20 to respond to temperature changes in real time and automatically adjusting the heat dissipation strategy can ensure that the battery pack operates within the optimal temperature range.

[0032] Optionally, the box body 40 includes a bottom plate 405 and a first side plate 401, a second side plate 402, a third side plate 403 and a fourth side plate 404 arranged around the bottom plate 405, the bottom plate 405 is arranged opposite to the box cover 30, the air outlet 42 is arranged on the first side plate 401, the air inlet 41 is arranged on the second side plate 402, the first side plate 401 and the second side plate 402 are arranged opposite to each other, and the third side plate 403 and the fourth side plate 404 are arranged opposite to each other.

[0033] In this embodiment, a box body with a receiving cavity is formed by setting a bottom plate 405, and sequentially setting a first side plate 401, a second side plate 402, a third side plate 403 and a fourth side plate 404 around the bottom plate 405, and the lithium battery module 10 can be set in the receiving cavity. The box cover 30 is arranged opposite to the bottom plate 405 and fixed at the opening of the receiving cavity to fix the lithium battery module 10 and reduce the situation that the lithium battery module 10 slips out of the box body 40.

[0034] The air outlet 42 is arranged on the first side plate 401, and the air inlet 41 is arranged on the second side plate 402, so that the air inlet 41 and the air outlet 42 are arranged relatively at the two ends of the lithium battery module 10. In this way, the air outside the box 40 can enter the box 40 through the air inlet 41, and the heat generated by the lithium battery module 10 during operation can be discharged from the air outlet 42 through the flow of air, thereby increasing the contact area between the air duct and the lithium battery module 10, thereby improving the heat dissipation effect of the lithium battery during the charging and discharging process, and reducing the situation where the local temperature of the lithium battery module 10 is increased due to heat accumulation.

[0035] Optionally, the lithium battery module 10 includes a first lithium battery module 101 and a second lithium battery module 102, the first lithium battery module 101 and the second lithium battery module 102 are spaced apart in the accommodating cavity, and the air inlet 41 and the air outlet 42 are connected through the spacing area between the first lithium battery module 101 and the second lithium battery module 102.

[0036] In this embodiment, the lithium battery module 10 can be composed of a plurality of lithium battery modules connected in series or in parallel. For example, the lithium battery module 10 can include a first lithium battery module 101 and a second lithium battery module 102 arranged in series. The first lithium battery module 101 and the second lithium battery module 102 are arranged in parallel in the accommodating cavity. The electrodes of the first lithium battery module 101 and the electrodes of the second lithium battery module 102 can be connected by wires. The interval area between the first lithium battery module 101 and the second lithium battery module 102 arranged in parallel runs through the air inlet 41 and the air outlet 42. In this way, an air duct space is added between the first lithium battery module 101 and the second lithium battery module 102, which increases the contact area between the flowing air and the lithium battery module 10, reduces the heat accumulation in the middle area of ​​the lithium battery module 10, and reduces the local temperature increase in the middle area of ​​the lithium battery module 10, thereby improving the heat dissipation effect of the lithium battery during operation.

[0037] Optionally, air guide ports 43 are respectively provided on the third side plate 403 and the fourth side plate 404 .

[0038] In this embodiment, the third side plate 403 and the fourth side plate 404 are arranged opposite to each other, and air guide ports 43 are respectively arranged on the third side plate 403 and the fourth side plate 404. In this way, air circulation channels are arranged around the lithium battery module 10, which increases the air circulation efficiency, makes the air flow evenly inside the battery pack, reduces the situation where the local temperature is too high due to the local heat accumulation of the lithium battery module 10, and further improves the heat dissipation effect of the lithium battery during operation.

[0039] Optionally, the air guide 43 may include a plurality of circular through hole structures arranged in an array. Exemplarily, a plurality of circular through hole structures are arranged in an array on the third side plate 403, and a plurality of circular through hole structures are arranged in an array on the fourth side plate 404 to increase the passage for air circulation. At the same time, the situation where a single through hole structure is too large and causes foreign matter to enter the interior of the box 40 and cause a battery short circuit is reduced. In this way, the heat dissipation effect is improved while enhancing the safety of the battery pack.

[0040] Optionally, the air cooling module 20 is arranged at the position of the air outlet 42, the size of the air outlet 42 matches the size of the air cooling module 20, and the air inlet 41 includes a plurality of long strip through-hole structures arranged in an array.

[0041] In this embodiment, an air outlet 42 having a size matching that of the air cooling module 20 is provided on the first side plate 401 of the box body 40, so that the air cooling module 20 can be embedded in the air outlet 42, and a plurality of long strip air inlets 41 arranged in an array are provided on the second side plate 402 of the box body 40. In addition, a plurality of circular air guide ports 43 arranged in an array are provided on the third side plate 403 and the fourth side plate 404, respectively. In this way, the air outside the box body 40 can enter the inside of the box body 40 through the air inlet 41 and the air guide port 43, and the heat generated by the lithium battery module 10 during operation can be discharged from the air outlet 42 through the flow of air. The air cooling module 20 arranged at the air outlet 42 speeds up the efficiency of air discharge in the accommodating cavity, and by arranging a plurality of long strip air inlets 41 arranged in an array and a plurality of circular air guide ports 43 arranged in an array, the air circulation channel is increased, the efficiency of air introduction into the accommodating cavity is accelerated, and the air flows evenly inside the battery pack, thereby reducing the situation where local heat accumulation in the lithium battery module 10 causes local excessive temperature, and further improving the heat dissipation effect of the lithium battery during operation.

[0042] Optionally, a receiving groove is provided on a side plate of the box body 40 , a space formed by the receiving groove is located in the receiving cavity, and the control module 50 is provided in the receiving groove.

[0043] In this embodiment, a receiving groove for placing the control module 50 may be provided on the first side plate 401. The first side plate 401 may be processed by a stamping process so that the first side plate 401 is recessed into the receiving cavity, so that a receiving groove is formed on the side of the first side plate 401 away from the receiving cavity, the control module 50 may be provided in the receiving groove, and a cover plate 406 is provided at the opening of the receiving groove, the control module 50 is fixed in the receiving groove by the cover plate 406, and the control module 50 is reduced from slipping out of the receiving groove.

[0044] The cover plate 406 can be attached to the first side plate 401, and the space formed by the receiving groove is located in the receiving cavity. This integrated design layout makes the overall structure of the battery pack more compact.

[0045] Optionally, the control module 50 and the air cooling module 20 are located on the same side panel of the box body 40, and a wiring channel 407 is set on the box body 40 near the control module 50. The wiring channel 407 passes through the box cover 30 and the box body 40, and the control module 50 is electrically connected to the wiring harness in the wiring channel 407.

[0046] In this embodiment, an independent wiring channel 407 is provided in the battery pack, and the connection harnesses between different battery packs can be arranged in the wiring channel 407. The control module 50 can be electrically connected to the corresponding harnesses in the wiring channel 407 to achieve series or parallel connection between different battery packs. The control module 50 and the air cooling module 20 are located on the same side panel of the box 40, which facilitates the maintenance of the battery pack and improves the convenience during use.

[0047] Optionally, a handle structure 60 may be further provided on the first side panel 401 to facilitate carrying and installing the battery pack.

[0048] Optionally, the air cooling module 20 may include a fan 201 and a fan cover 202. The driving action of the fan 201 accelerates the air circulation speed and improves the heat dissipation effect. By setting the fan cover 202 on the fan 201, the situation where foreign matter enters and causes the fan 201 to malfunction is reduced.

[0049] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. An air-cooled lithium battery pack, characterized in that: It includes a lithium battery module, an air cooling module, a box cover and a box body, the lithium battery module is arranged in a accommodating cavity formed by the box cover and the box body, the box body is provided with an air inlet and an air outlet, the accommodating cavity is connected with the outside of the box body through the air inlet and the air outlet, and the air cooling module is arranged at at least one position between the air inlet and the air outlet.

2. The air-cooled lithium battery pack according to claim 1, characterized in that: It also includes a control module, which is electrically connected to the lithium battery module and the air cooling module. The control module controls the output power of the air cooling module according to the collected temperature of the lithium battery module.

3. The air-cooled lithium battery pack according to claim 2, characterized in that: A receiving groove is arranged on one side plate of the box body, a space formed by the receiving groove is located in the receiving cavity, and the control module is arranged in the receiving groove.

4. The air-cooled lithium battery pack according to claim 2, characterized in that: The control module and the air cooling module are located on the same side panel of the box body, and a wiring channel is provided on the box body near the control module. The wiring channel runs through the box cover and the box body, and the control module is electrically connected to the wiring harness in the wiring channel.

5. The air-cooled lithium battery pack according to claim 1, characterized in that: The lithium battery module includes a first lithium battery module and a second lithium battery module, the first lithium battery module and the second lithium battery module are arranged in the accommodating cavity at intervals, and the air inlet and the air outlet are connected through the interval area between the first lithium battery module and the second lithium battery module.

6. The air-cooled lithium battery pack according to any one of claims 1 to 5, characterized in that: The box body includes a bottom plate and a first side plate, a second side plate, a third side plate and a fourth side plate arranged around the bottom plate, the bottom plate is arranged opposite to the box cover, the air outlet is arranged on the first side plate, the air inlet is arranged on the second side plate, the first side plate and the second side plate are arranged opposite to each other, and the third side plate and the fourth side plate are arranged opposite to each other.

7. The air-cooled lithium battery pack according to claim 6, characterized in that: The air cooling module is arranged at the air outlet position, the size of the air outlet matches the size of the air cooling module, and the air inlet includes a plurality of long strip through-hole structures arranged in an array.

8. The air-cooled lithium battery pack according to claim 6, characterized in that: The third side plate and the fourth side plate are respectively provided with air guide ports.

9. The air-cooled lithium battery pack according to claim 8, characterized in that: The air guide port includes a plurality of circular through-hole structures arranged in an array.

10. The air-cooled lithium battery pack according to claim 6, characterized in that: The first side panel is also provided with a handle structure.

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