Energy storage laminated cell energy storage device
By adopting the combination of stacked battery cell design and heat conduction tube cooling contacts in the energy storage system, the problem of temperature differences between the battery cells inside and outside the lithium battery module and the space occupied by the cooling system is solved, and efficient cooling and number of battery cells are achieved. Increases and extends the system life.
Patent Information
- Application Number
- CN202420550978.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-20
AI Technical Summary
In the energy storage system, the battery cells are inconsistent due to the temperature difference between the internal and external battery cells of the lithium battery module, which affects the circulation life of the system. The volume occupied by the traditional cooling system leads to a decrease in the number of battery cells, which makes it impossible to maximize the utilization of the shell space.
The energy storage stacked battery cell energy storage device is designed. By fixing multiple battery cell groups in sequence in the shell, laying an insulating isolation layer, and fixing cooling contacts on the side wall of the shell, the heat conduction pipe is arranged in the insulating layer to conduct heat. The tube contacts the cooling contacts to conduct heat, achieve efficient cooling, simplify the structure and save space.
It realizes efficient cooling of the battery cell group, improves the number of battery cell groups, ensures the consistency of the battery cell temperature, extends the cycle life of the system, and maximizes the use of the inner space of the shell.
Smart Images
Figure CN222190906U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of battery core cooling, and more specifically, relates to an energy storage laminated battery core energy storage device. Background Art
[0002] At present, square aluminum shell lithium batteries are the mainstream application in energy storage and communication system applications. In the existing square aluminum shell energy storage system lithium battery pack design and square aluminum shell communication system lithium battery pack design, the heat dissipation method generally uses the square aluminum shell metal outer surface for heat dissipation. However, in its group design, since the contact area between the inner and outer cells of the lithium battery module and the outside world is inconsistent, the heat dissipation conditions are also inconsistent. The temperature of the internal cells of the lithium battery module is higher than the temperature of the external cells of the lithium battery module, resulting in temperature differences between the cells, thereby affecting the consistency of the lithium battery pack and further affecting the cycle life of the system.
[0003] Traditionally, when cooling multiple battery cell groups in a housing, a cooling system needs to be installed and arranged in the housing. Since the cooling system occupies a certain volume, the number of battery cell groups that can be installed is reduced, and the space in the housing cannot be maximized. Utility Model Content
[0004] The utility model aims to provide an energy storage laminated battery cell energy storage device, aiming to solve the problem that the number of battery cell groups that can be installed is reduced due to the cooling system occupying a certain volume.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide an energy storage laminated battery storage device, including:
[0006] case;
[0007] A plurality of battery cell groups are sequentially fixed in the housing;
[0008] An insulating isolation layer is laid between two adjacent battery cell groups;
[0009] A plurality of cooling contacts are fixed in sequence on the side wall of the housing;
[0010] A heat-conducting pipe is inserted into the insulating layer, and an end of the heat-conducting pipe abuts against the corresponding cooling contact to realize heat transfer.
[0011] In a possible implementation manner, a heat-conducting net is provided on the outer side surface of the shell, and the plurality of cooling contacts are all fixed on the heat-conducting net.
[0012] In a possible implementation manner, the cooling contact is disposed throughout the housing.
[0013] In a possible implementation manner, the cooling contact and the heat conducting network are integrally formed.
[0014] In a possible implementation manner, a thermal pad is provided between the cooling contact and the heat pipe.
[0015] In a possible implementation manner, the thermal pad is bonded between the heat pipe and the cooling contact.
[0016] In a possible implementation, the heat pipe is arranged to penetrate the cooling contact.
[0017] In a possible implementation, a heat conducting block is provided at an end of the heat conducting pipe close to the cooling contact, and the heat conducting block abuts against the cooling contact.
[0018] In a possible implementation manner, the heat conductive block is plug-fitted to the cooling contact.
[0019] In a possible implementation, the insulating isolation layer includes an insulating film and a heat conductive material disposed inside the insulating film.
[0020] The beneficial effect of the energy storage stacked battery cell energy storage device provided by the utility model is that compared with the prior art, in the energy storage stacked battery cell energy storage device of the utility model, multiple battery cell groups are fixed in sequence in the shell; an insulating isolation layer is laid between two adjacent battery cell groups. Multiple cooling contacts are fixed on the inner side of the shell, and a heat conducting pipe is inserted into the insulating layer.
[0021] In actual application, the heat pipe contacts the cooling contact, absorbs heat through the insulating isolation layer and finally conducts the heat to the cooling contact. The heat pipe and cooling contact in the present application can finally realize the cooling of the battery pack, and the overall structure is relatively simple, the operation is reliable, and the space inside the shell can be greatly saved, and the number of battery packs that can be fixed is increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of the connection between the housing and the battery pack provided in an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the structure of the energy storage laminated battery cell energy storage device provided in the first embodiment of the utility model;
[0025] Figure 3A schematic diagram of the connection between the heat pipe and the cooling contact provided in the second embodiment of the present utility model;
[0026] Figure 4 This is a schematic diagram of the connection between the heat pipe and the cooling contact provided in the third embodiment of the present utility model.
[0027] In the figure: 1. Shell; 2. Battery cell group; 3. Insulation isolation layer; 4. Heat conductive mesh; 5. Heat conductive block; 6. Heat conductive pad; 7. Heat conductive pipe; 8. Heat conductive material; 9. Insulation film; 10. Cooling contact. DETAILED DESCRIPTION
[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0029] Please also read Figures 1 to 4 , the energy storage laminated battery cell energy storage device provided by the utility model is now described. The energy storage laminated battery cell energy storage device includes: a shell 1, a plurality of battery cell groups 2, an insulating isolation layer 3, a plurality of cooling contacts 10 and a heat pipe 7. The plurality of battery cell groups 2 are fixed in the shell 1 in sequence. The insulating isolation layer 3 is laid between two adjacent battery cell groups 2. A plurality of cooling contacts 10 are fixed on the side wall of the shell 1 in sequence. The heat pipe 7 is passed through the insulating layer, and the end of the heat pipe 7 abuts against the corresponding cooling contact 10 to realize heat transfer.
[0030] The beneficial effects of the energy storage laminated battery energy storage device provided by the utility model are as follows: compared with the prior art, in the energy storage laminated battery energy storage device of the utility model, multiple battery cell groups 2 are fixed in sequence in the housing 1; an insulating isolation layer 3 is laid between two adjacent battery cell groups 2. Multiple cooling contacts 10 are fixed on the inner side of the housing 1, and the heat pipe 7 is inserted into the insulating layer.
[0031] In actual application, the heat pipe 7 contacts the cooling contact 10, and the heat pipe 7 absorbs heat through the insulating isolation layer 3 and finally conducts the heat to the cooling contact 10. The heat pipe 7 and the cooling contact 10 in the present application can finally realize the cooling of the battery cell group 2, and the overall structure is relatively simple, the operation is reliable, and the space inside the housing 1 can be greatly saved, and the number of battery cell groups 2 that can be fixed is increased.
[0032] With the guidance and promotion of domestic and foreign policies in the field of new energy, the technological innovation of lithium batteries in the fields of energy storage and communication has developed rapidly. The technical research on lithium batteries has gradually deepened, the industrialization of lithium-ion batteries has rapidly increased, and the requirements of lithium battery application clients have become higher and higher. In the application of lithium batteries, the consistency control of battery cells is the key technology for battery cell grouping, and the consistency control also includes two aspects: one is the consistency of the basic performance of lithium batteries, including capacity, voltage, internal resistance, self-discharge, etc.; the other is the consistency control of the battery cell use environment, among which the most important is the consistency of charge and discharge temperature.
[0033] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 2 , Figure 3 and Figure 4 A heat-conducting net 4 is provided on the outer side of the shell 1 , and a plurality of cooling contacts 10 are fixed on the heat-conducting net 4 .
[0034] First, there are multiple battery cell groups 2 in the housing 1. During use, the multiple battery cell groups 2 will generate a certain amount of heat. In order to conduct the generated heat, a heat conducting net 4 is provided on the outer side of the housing 1. The heat conducting net 4 is in contact with the refrigeration device. In actual application, in order to prevent the temperature in the external environment from being absorbed by the heat conducting net 4, an insulating cover is usually provided on the outer side of the heat conducting net 4.
[0035] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 3 , the cooling contact 10 is arranged through the shell 1. In the present application, the cooling contact 10 is arranged on the side wall of the shell 1, and only the battery cell group 2 and the insulating isolation layer 3 are arranged in the shell 1. Through the above arrangement, the space in the shell 1 can be maximized. In order to achieve the above technical effect, multiple cooling contacts 10 are arranged through the shell 1, one end of the cooling contact 10 is connected to the heat conduction network 4, and the other end is abutted against the heat conduction pipe 7. Only through the above design can the heat generated in the battery cell group 2 in the shell 1 be transferred to the heat conduction network 4.
[0036] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 2 , Figure 3 and Figure 4, the cooling contact 10 is formed integrally with the heat-conducting net 4. In order to ensure the effective transfer of heat between the cooling contact 10 and the heat-conducting net 4, that is, to improve the efficiency of heat transfer between the cooling contact 10 and the heat-conducting net 4, the cooling contact 10 is formed integrally with the heat-conducting net 4 when applied. During the installation process, a plurality of through holes are firstly opened on the side wall of the housing 1, and then a plurality of cooling contacts 10 are sequentially inserted into the through holes of the housing 1. In order to prevent the cooling contact 10 from slipping out of the through hole, a sealing sleeve can be set on the outside of the cooling contact 10, and the sealing sleeve is used to block the gap between the through hole and the cooling contact 10.
[0037] More importantly, the one-piece molding arrangement can improve the connection strength between the cooling contact 10 and the heat-conducting network 4, thereby ensuring the stability between the two.
[0038] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 2 A thermal pad 6 is provided between the cooling contact 10 and the heat pipe 7. The split design between the heat pipe 7 and the cooling contact 10, coupled with the large number of battery packs 2 in the housing 1, results in a large number of heat pipes 7 in the housing 1. Ensuring effective contact between the heat pipe 7 and the cooling contact 10 is the key to ensuring effective heat transfer.
[0039] In order to avoid a gap between the cooling contact 10 and the heat pipe 7, a heat pad 6 can be provided in advance on the side of the cooling contact 10 close to the inner cavity of the housing 1. The heat pad 6 can be made of silicone. After the insulating isolation layer 3 is positioned, the heat pipe 7 will effectively rest against the heat pad 6. Finally, the heat between the cooling contact 10 and the heat pipe 7 is effectively transferred with the help of the heat pad 6.
[0040] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 2 The thermal pad 6 is bonded between the heat pipe 7 and the cooling contact 10. In order to ensure that the thermal pad 6 can be effectively fitted between the heat conductive block 5 and the cooling contact 10, a certain amount of fixing glue can be applied to the sides of the thermal pad 6 in advance. The fixing glue can ensure that there is no gap between the two components of the thermal pad 6 and can avoid the risk of the heat pipe 7 being separated from the thermal pad 6.
[0041] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 3, the heat pipe 7 is arranged through the cooling contact 10. In another embodiment, in order to avoid the separation of the heat pipe 7 and the cooling contact 10, the heat pipe 7 can be directly arranged through the cooling contact 10. For more detailed description, firstly, a connection hole is arranged on the cooling contact 10, and the heat pipe 7 passes through the connection hole so as to be plugged with the cooling contact 10. After the plugging is completed, a fixing glue can be applied to the heat pipe 7, or the heat pipe 7 and the cooling contact 10 are welded, so that the connection between the two can be finally achieved reliably and stably.
[0042] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 2 and Figure 4 The end of the heat pipe 7 close to the cooling contact 10 is provided with a heat conducting block 5, and the heat conducting block 5 abuts against the cooling contact 10. It should be noted that there are multiple battery cell groups 2, and the battery cell groups 2 have a certain length and volume, which results in the heat pipe 7 having a certain length, but at the same time the heat pipe 7 needs to be flat, because the heat pipe 7 needs to be inserted into the insulating isolation layer 3, and the insulating isolation layer 3 has a certain thickness requirement.
[0043] With the above considerations, in order to improve the thermal conductivity of the heat pipe 7, the outer diameter of the cooling contact 10 needs to be increased accordingly. More importantly, the heat block 5 is fixed at the end of the heat pipe 7 close to the cooling contact 10. The outer diameter of the heat block 5 is larger, so that heat can be transferred between the heat block 5 more quickly.
[0044] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 4 , the heat conducting block 5 is plugged and matched with the cooling contact 10. The function of the heat conducting block 5 is to provide the amount of heat transfer between the cooling contact 10 and the heat conducting tube 7, because the outer diameters of the heat conducting block 5 and the cooling contact 10 are both larger than the outer diameter of the heat conducting tube 7. In order to further define the position of the heat conducting block 5 and ensure the reliability of heat transfer, the heat conducting block 5 can be directly plugged and matched with the cooling contact 10, and in this case, the outer diameter of the cooling contact 10 needs to be larger than the outer diameter of the heat conducting block 5.
[0045] In some embodiments of the energy storage stacked battery cell energy storage device provided in this application, please refer to Figure 2 , Figure 3 and Figure 4 The insulating isolation layer 3 includes an insulating film 9 and a heat-conducting material 8 disposed inside the insulating film 9. In order to quickly extract heat from the housing 1, it is necessary to improve the thermal conductivity of the insulating isolation layer 3. For this purpose, the heat-conducting pipe 7 is firstly passed through the inside of the heat-conducting material 8, and heat transfer between the heat-conducting pipe 7 and the heat-conducting material 8 is realized through the heat-conducting pipe 7. Then, the insulating film 9 is mounted on the outside of the heat-conducting material 8. The insulating film 9 is an insulating material and can play a certain insulating role.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An energy storage laminated battery cell energy storage device, characterized in that: include: case; A plurality of battery cell groups are sequentially fixed in the housing; An insulating isolation layer is laid between two adjacent battery cell groups; A plurality of cooling contacts are fixed in sequence on the side wall of the housing; The heat-conducting pipe is inserted into the insulating isolation layer, and the end of the heat-conducting pipe abuts against the corresponding cooling contact to realize heat transfer.
2. The energy storage laminated battery energy storage device according to claim 1, characterized in that: A heat-conducting net is disposed on the outer side of the shell, and the plurality of cooling contacts are all fixed on the heat-conducting net.
3. The energy storage laminated battery energy storage device according to claim 1, characterized in that: The cooling contact is disposed through the housing.
4. The energy storage laminated battery energy storage device according to claim 2, characterized in that: The cooling contact and the heat conducting network are integrally formed.
5. The energy storage laminated battery cell energy storage device according to claim 1, characterized in that: A heat conduction pad is provided between the cooling contact and the heat conduction pipe.
6. The energy storage laminated battery cell energy storage device according to claim 5, characterized in that: The thermal pad is bonded between the thermal pipe and the cooling contact.
7. The energy storage laminated battery cell energy storage device according to claim 1, characterized in that: The heat conducting pipe is arranged to penetrate the cooling contact.
8. The energy storage laminated battery cell energy storage device according to claim 1, characterized in that: A heat conduction block is provided at the end of the heat conduction pipe close to the cooling contact, and the heat conduction block abuts against the cooling contact.
9. The energy storage laminated battery cell energy storage device according to claim 8, characterized in that: The heat conducting block is plug-fitted with the cooling contact.
10. The energy storage laminated battery cell energy storage device according to claim 1, characterized in that: The insulating isolation layer includes an insulating film and a heat conductive material arranged inside the insulating film.