Heating assembly and battery module
By using the combined structure of insulating parts and thermal conductivity and heating wire in the battery module, the heating unbalanced and dry burning problems are solved, the temperature balance and safety of the battery pack are achieved, and the service life is extended.
Patent Information
- Application Number
- CN202422244438.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing heating technology is prone to dry burning, which leads to safety hazards of the battery module and is unbalanced heating, resulting in large temperature differences in different locations of the battery pack, affecting the service life.
An insulating member is used to separate adjacent cells and use a combined structure of thermally conductive liquid and heating wire. The insulating member is equipped with a storage cavity to communicate with the outside world. The heating wire is partially immersed in the thermally conductive liquid, and heat is transferred through the thermally conductive liquid to avoid direct contact and achieve balanced heating.
It avoids the battery cell short circuit and dry burning, improves the balance of heating of the battery module, reduces the temperature difference, and extends the service life of the battery pack.
Smart Images
Figure CN223123987U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and particularly relates to a heating component and a battery module. Background Art
[0002] In the technical field of batteries, especially for lithium-ion batteries or similar high-energy density battery systems used in applications such as portable electronic devices and electric vehicles, it is crucial to efficiently and safely heat the battery module. Currently, some heating technologies use heating wires as heat sources and directly contact the battery cells to accelerate the temperature rise process of the battery.
[0003] However, this heating method is prone to dry burning, posing a safety hazard; moreover, the heating is uneven, resulting in a large temperature difference at different positions of the battery pack and affecting the service life of the battery pack. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a heating component and a battery module, which can avoid dry burning, improve the heating uniformity of the battery module, reduce the temperature difference between different positions of the battery pack, thereby ensuring the temperature uniformity of the battery pack and improving the service life of the battery pack.
[0005] The embodiments of the utility model are implemented as follows:
[0006] In a first aspect, the utility model provides a heating component, including:
[0007] An insulating member, which is provided with a receiving cavity communicating with the outside; the insulating member is used to separate two adjacent battery cells;
[0008] A heat-conducting liquid, which fills the receiving cavity;
[0009] At least one heating wire, at least a part of which is immersed in the heat-conducting liquid.
[0010] In an optional embodiment, the heating component further includes at least one limiting member, which is sleeved on the heating wire and abuts against the inner wall of the insulating member; the limiting member is immersed in the heat-conducting liquid.
[0011] In an optional embodiment, the limiting member includes a ferrule portion and a plurality of abutting portions. The ferrule portion is sleeved on the heating wire; the plurality of abutting portions are circumferentially arranged along the central axis of the ferrule portion; one end of each abutting portion is connected to the ferrule portion, and the other end of each abutting portion abuts against the inner wall of the insulating member.
[0012] In an optional embodiment, the number of the limiting members is multiple, and the multiple limiting members are arranged at intervals along the extending direction of the heating wire.
[0013] In an alternative embodiment, the heating assembly further includes at least one limiting plate located in the accommodating cavity and connected to the insulating member;
[0014] wherein, the limiting plate abuts against the limiting member; the length direction of the limiting plate is parallel to the extending direction of the heating wire.
[0015] In an alternative embodiment, the number of the limiting plates is two, the two limiting plates are arranged oppositely, the heating wire and the limiting member are located between the two limiting plates, and the limiting member abuts against the two limiting plates.
[0016] In an alternative embodiment, the insulating member is further provided with an expansion cavity communicating with the accommodating cavity and the outside.
[0017] In an alternative embodiment, the insulating member is provided with an opening, and the accommodating cavity communicates with the outside through the opening;
[0018] The heating assembly further includes a sealing member detachably cooperating with the opening for closing or opening the accommodating cavity.
[0019] In an alternative embodiment, the sealing member is provided with at least one through hole, and one end of the heating wire passes through the through hole and is movably cooperated with the through hole.
[0020] In a second aspect, the present utility model provides a battery module, including a plurality of battery cells and at least one of the foregoing heating assemblies; the insulating member is located between two adjacent battery cells and is detachably connected to the battery cells.
[0021] The beneficial effects of the embodiments of the present utility model include:
[0022] The heating assembly includes an insulating member, a heat-conducting liquid and at least one heating wire. By providing the insulating member, the heating assembly separates two adjacent battery cells to prevent the battery cells from contacting each other and causing a short-circuit phenomenon. The insulating member is provided with an accommodating cavity communicating with the outside, and the heat-conducting liquid fills the accommodating cavity. At least part of the heating wire is immersed in the heat-conducting liquid, so that the heat of the heating wire can be transferred to the battery cells through the heat-conducting liquid, preventing the heating wire from directly contacting the battery cells, thereby avoiding the dry-burning phenomenon and damage to the battery cells. Moreover, the heating assembly can improve the heating uniformity of the battery module, reduce the temperature difference between different positions of the battery pack, ensure the temperature uniformity of the battery pack, and improve the service life of the battery pack. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 Schematic diagram of the heating component from the first perspective provided by the embodiment of the present utility model;
[0025] Figure 2 Cross-sectional view of the accommodation cavity of the heating component filled with heat-conducting liquid provided by the embodiment of the present utility model;
[0026] Figure 3 Schematic diagram of the insulating member provided by the embodiment of the present utility model;
[0027] Figure 4 It is Figure 3 Cross-sectional view at A-A in
[0028] Figure 5 Schematic diagram of the heating component from the second perspective provided by the embodiment of the present utility model;
[0029] Figure 6 It is Figure 5 Cross-sectional view at B-B in
[0030] Figure 7 It is Figure 6 Local enlarged view at C in
[0031] Figure 8 Schematic diagram of the limiting member provided by the embodiment of the present utility model;
[0032] Figure 9 Schematic diagram of the sealing member provided by the embodiment of the present utility model;
[0033] Figure 10 Schematic diagram of the battery module from the first perspective provided by the embodiment of the present utility model;
[0034] Figure 11 Schematic diagram of the battery module from the second perspective provided by the embodiment of the present utility model.
[0035] Icon: 100 - Heating component; 110 - Insulating member; 111 - Accommodation cavity; 112 - Expansion cavity; 113 - Opening; 120 - Heat-conducting liquid; 130 - Heating wire; 140 - Limiting member; 141 - Ring portion; 142 - Abutting portion; 150 - Limiting plate; 160 - Sealing member; 161 - Through hole; 200 - Battery module; 210 - Battery cell. Detailed implementation manners
[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0038] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.
[0040] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0041] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0042] Please refer toFigures 1 - 7 , Figure 1 is a schematic structural diagram of the heating assembly 100 provided by an embodiment of the present invention from a first perspective; Figure 2 is a cross-sectional view of the accommodation cavity 111 of the heating assembly 100 provided by an embodiment of the present invention filled with the heat-conducting liquid 120; Figure 3 is a schematic structural diagram of the insulating member 110 provided by an embodiment of the present invention; Figure 4 is Figure 3 a cross-sectional view taken at A-A in Figure 5 is a schematic structural diagram of the heating assembly 100 provided by an embodiment of the present invention from a second perspective; Figure 6 is Figure 5 a cross-sectional view taken at B-B in Figure 7 is Figure 6 a partial enlarged view at C in
[0043] An embodiment of the present invention provides a heating assembly 100, which includes an insulating member 110, a heat-conducting liquid 120, and at least one heating wire 130. The insulating member 110 is provided with an accommodation cavity 111 that communicates with the outside; the insulating member 110 is used to separate two adjacent battery cells 210; the heat-conducting liquid 120 fills the accommodation cavity 111; at least a part of the heating wire 130 is immersed in the heat-conducting liquid 120.
[0044] Specifically, in this embodiment, the accommodation cavity 111 communicates with the outside, so that the heat-conducting liquid 120 can be injected into the accommodation cavity 111, so that the heat-conducting liquid 120 fills the accommodation cavity 111, and at least a part of the heating wire 130 is immersed in the heat-conducting liquid 120. The end of the heating wire 130 extends out of the accommodation cavity 111 and is connected to an external power source to be energized so that the heating wire 130 heats up. After the heating wire 130 generates heat, the heat-conducting liquid 120 is used as a heat-conducting medium to transfer the heat to the insulating member 110, and then the insulating member 110 is used to transfer the heat to the battery cell 210.
[0045] Thus, the heating assembly 100 immerses the heating wire 130 in the heat-conducting liquid 120, so that the heating wire 130 does not directly contact the battery cell 210, avoiding the occurrence of dry burning and preventing damage to the battery cell 210. Moreover, the heating assembly 100 makes the heating of the battery cell 210 by the heating wire 130 more balanced through the heat transfer of the heat-conducting liquid 120, reduces the temperature difference between different positions of the battery pack, ensures the temperature balance of the battery pack, and improves the service life of the battery pack.
[0046] It should be noted that, in this embodiment, the number of the heating wires 130 is one, and the end of the heating wire 130 is located outside the insulating member 110, wherein the heating wire 130 is bent and immersed in the heat-conducting liquid 120. In other embodiments, the number of the heating wires 130 can be adjusted according to actual situations.
[0047] It should also be noted that, in this embodiment, the heat-conducting liquid 120 is an antifreeze liquid to effectively prevent gasification or freezing under the influence of the ambient temperature. In other embodiments, other heat-conducting liquid 120 media can be selected according to actual situations.
[0048] Furthermore, please refer to Figures 1 - 7 , the heating assembly 100 further includes at least one limiting member 140. The limiting member 140 is sleeved on the heating wire 130, and the limiting member 140 abuts against the inner wall of the insulating member 110; the limiting member 140 is immersed in the heat-conducting liquid 120.
[0049] Specifically, in this embodiment, the edge of the limiting member 140 abuts against the inner wall of the insulating member 110, and the limiting member 140 is sleeved on the heating wire 130, so that the heating wire 130 is restricted by the limiting member 140 and thus cannot move. Thereby, the position of the heating wire 130 is fixed, avoiding the heating wire 130 from fitting against the inner wall of the insulating member 110, which may lead to inconsistent heating efficiency of the battery cells 210 on both sides of the insulating member 110, avoiding uneven heating, reducing the temperature difference between different positions of the battery pack, and ensuring the temperature balance of the battery pack.
[0050] According to the above structural arrangement, please refer to Figures 1 - 8 , Figure 8 is a schematic structural diagram of the limiting member 140 provided by the embodiment of the present invention. The limiting member 140 includes a ferrule portion 141 and a plurality of abutting portions 142. The ferrule portion 141 is sleeved on the heating wire 130; the plurality of abutting portions 142 are circumferentially arranged along the central axis of the ferrule portion 141; one end of each abutting portion 142 is connected to the ferrule portion 141, and the other end of each abutting portion 142 abuts against the inner wall of the insulating member 110.
[0051] It can be understood that the abutting portion 142 is strip-shaped, and two adjacent abutting portions 142 are spaced apart, thereby reducing the weight of the limiting member 140, and further reducing the weight of the battery pack. Moreover, the lengths of each abutting portion 142 are equal, so that the heating wire 130 located in the accommodating cavity 111 is at the center, thereby ensuring the consistency of the heating efficiency of the battery cells 210 on both sides of the insulating member 110, reducing the temperature difference between different positions of the battery pack, and ensuring the temperature balance of the battery pack.
[0052] According to the above, the number of the limiting members 140 is multiple, and the multiple limiting members 140 are arranged at intervals along the extending direction of the heating wire 130. It can be understood that the battery pack includes multiple battery cells 210, and multiple battery cells 210 are arranged on both sides of the insulating member 110. To ensure the uniformity of heating, the heating wire 130 extends along the length direction of the accommodating cavity 111. However, the heating wire 130 is relatively soft. During the extending process, if it is bent, it will cause it to fit against the inner wall of the insulating member 110, thus posing a safety hazard. Therefore, the heating assembly 100 is provided with multiple limiting members 140 arranged at intervals along the extending direction of the heating wire 130, so that the position of the heating wire 130 is fixed, and it will not cause partial heating wire 130 to fit against the insulating member 110 due to its own bending, ensuring the uniformity of heating and improving the safety of the battery pack.
[0053] Further, please refer to Figures 1 - 7 , the heating assembly 100 further includes at least one limiting plate 150. The limiting plate 150 is located in the accommodating cavity 111 and is connected to the insulating member 110. Among them, the limiting plate 150 abuts against the limiting member 140; the length direction of the limiting plate 150 is parallel to the extending direction of the heating wire 130.
[0054] Specifically, in this embodiment, the heating wire 130 is bent into two segments, and both segments of the heating wire 130 extend along the length direction of the accommodating cavity 111. However, to prevent the two ends of the heating wire 130 from approaching or separating from each other, the heating assembly 100 is provided with a limiting plate 150, and the abutting portion of the limiting member 140 abuts against the limiting plate 150, thereby fixing the heating wire 130 and restricting the movement of the heating wire 130, so as to prevent the heating wire 130 from coming into contact with each other, resulting in a dry burning phenomenon and improving the safety of the battery pack.
[0055] According to the above, please refer to Figures 1 - 7 , in this embodiment, one segment of the heating wire 130 is provided with two limiting plates 150, the two limiting plates 150 are arranged oppositely, the heating wire 130 and the limiting member 140 are located between the two limiting plates 150, and the limiting member 140 abuts against the two limiting plates 150, thereby restricting the movement of the heating wire 130.
[0056] In other embodiments, one segment of the heating wire 130 is provided with one limiting plate 150, and the two opposite abutting portions of the limiting member 140 abut against the limiting plate 150 and the inner wall of the insulating member 110 respectively, thereby restricting the movement of the heating wire 130.
[0057] Furthermore, the insulating member 110 is provided with an expansion cavity 112, which is in communication with the accommodating cavity 111 and the outside. Specifically, during the heating process of the heating wire 130, the thermal conductive liquid 120 will expand due to the heat; however, since the thermal conductive liquid 120 has already filled the accommodating cavity 111 in the initial state, the insulating member 110 is provided with the expansion cavity 112, so that after the thermal conductive liquid 120 expands due to the heat, part of the thermal conductive liquid 120 can enter the expansion cavity 112, thereby preventing the thermal conductive liquid 120 from squeezing the insulating member 110 and preventing the insulating member 110 from being damaged.
[0058] Based on the above, please refer to Figures 1 - 9 , Figure 9 The insulating member 110 is provided with an opening 113, and the accommodating cavity 111 is connected to the outside through the opening 113; the heating assembly 100 also includes a sealing member 160, which is detachably matched with the opening 113 to close or open the accommodating cavity 111.
[0059] It can be understood that in the process of assembling the heating component 100, in order to inject the thermal conductive liquid 120 into the accommodating cavity 111, an opening 113 is provided to facilitate the injection of the thermal conductive liquid 120. It should be noted that the expansion cavity 112, the accommodating cavity 111 and the opening 113 are interconnected, wherein the expansion cavity 112 is located above the accommodating cavity 111, so that during the injection process, the thermal conductive liquid 120 will not enter the expansion cavity 112.
[0060] It is understandable that the heating assembly 100 is used in a battery pack. In order to prevent the thermal conductive liquid 120 from flowing out during the use of the battery pack, the insulating member 110 is in a sealed state. Therefore, the heating assembly 100 further includes a sealing member 160, which is detachably matched with the opening 113 to close or open the accommodating cavity 111.
[0061] According to the above result, the sealing member 160 is provided with at least one through hole 161, and one end of the heating wire 130 passes through the through hole 161 and is movably matched with the through hole 161. It can be understood that the end of the heating wire 130 needs to be arranged on the outside of the insulating member 110 to be connected with the power supply, so as to be electrically heated. Therefore, the sealing member 160 in the heating assembly 100 is provided with a through hole 161 for the heating wire 130 to pass through.
[0062] Please refer to Figures 1 - 11 , Figure 10 A schematic diagram of the structure of a battery module 200 provided in an embodiment of the utility model at a first viewing angle; Figure 11 This is a schematic structural diagram of a battery module 200 provided in an embodiment of the present utility model from a second viewing angle.
[0063] An embodiment of the present utility model provides a battery module 200, which includes a plurality of battery cells 210 and at least one heating component 100. An insulating member 110 is located between two adjacent battery cells 210, and the insulating member 110 is detachably connected to the battery cells 210. The insulating member 110 separates the battery cells 210 on both sides thereof to avoid battery contact, thereby avoiding short-circuit phenomena and improving the safety of the battery pack. Moreover, the insulating member 110 is connected to and in contact with the battery cells 210, so that the heat of the heating wire 130 can be transferred to the battery cells 210 through the heat-conducting liquid 120 and the insulating member 110, thereby ensuring the consistency of the heating efficiency of the heating wire 130 for different battery cells 210, reducing the temperature difference between different positions of the battery pack, and ensuring the temperature balance of the battery pack.
[0064] In summary, the battery module 200 includes a plurality of battery cells 210 and at least one heating component 100. Among them, the heating component 100 includes an insulating member 110, a heat-conducting liquid 120, and at least one heating wire 130. The heating component 100 separates two adjacent battery cells 210 by providing the insulating member 110 to avoid short-circuit phenomena caused by the mutual contact of the battery cells 210. The insulating member 110 is provided with a receiving cavity 111, the receiving cavity 111 communicates with the outside, and the heat-conducting liquid 120 fills the receiving cavity 111. At least a part of the heating wire 130 is immersed in the heat-conducting liquid 120, so that the heat of the heating wire 130 can be transferred to the battery cells 210 through the heat-conducting liquid 120, avoiding direct contact between the heating wire 130 and the battery cells 210, avoiding dry-burning phenomena, and avoiding damage to the battery cells 210. Moreover, the heating component 100 can improve the balance of heating the battery module 200, reduce the temperature difference between different positions of the battery pack, thereby ensuring the temperature balance of the battery pack and improving the service life of the battery pack.
[0065] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A heating component, characterized in that, Comprising: An insulating member (110), the insulating member (110) is provided with a receiving cavity (111), and the receiving cavity (111) communicates with the outside; the insulating member (110) is used to separate two adjacent battery cells (210); A heat-conducting liquid (120), the heat-conducting liquid (120) fills the receiving cavity (111); At least one heating wire (130), at least a part of the heating wire (130) is immersed in the heat-conducting liquid (120).
2. The heating assembly according to claim 1, wherein: The heating assembly (100) further includes at least one limiting member (140), the limiting member (140) is sleeved on the heating wire (130), and the limiting member (140) abuts against the inner wall of the insulating member (110); the limiting member (140) is immersed in the heat-conducting liquid (120).
3. The heating assembly according to claim 2, wherein: The limiting member (140) includes a ferrule portion (141) and a plurality of abutting portions (142), the ferrule portion (141) is sleeved on the heating wire (130); the plurality of abutting portions (142) are circumferentially arranged along the central axis of the ferrule portion (141); one end of each abutting portion (142) is connected to the ferrule portion (141), and the other end of each abutting portion (142) abuts against the inner wall of the insulating member (110).
4. The heating assembly according to claim 2 or 3, wherein: The number of the limiting members (140) is multiple, and the multiple limiting members (140) are arranged at intervals along the extending direction of the heating wire (130).
5. The heating assembly according to claim 2 or 3, wherein: The heating assembly (100) further includes at least one limiting plate (150), the limiting plate (150) is located in the receiving cavity (111) and is connected to the insulating member (110); Wherein, the limiting plate (150) abuts against the limiting member (140); the length direction of the limiting plate (150) is parallel to the extending direction of the heating wire (130).
6. The heating assembly according to claim 5, wherein: The number of the limiting plates (150) is two, the two limiting plates (150) are arranged oppositely, the heating wire (130) and the limiting member (140) are located between the two limiting plates (150), and the limiting member (140) abuts against the two limiting plates (150).
7. The heating assembly according to any one of claims 1-3, wherein: The insulating member (110) is further provided with an expansion cavity (112), and the expansion cavity (112) communicates with the receiving cavity (111) and the outside.
8. The heating assembly according to any one of claims 1-3, wherein: The insulating member (110) is provided with an opening (113), and the receiving cavity (111) communicates with the outside through the opening (113); The heating component (100) further includes a seal (160), which is detachably engaged with the opening (113) and is configured to close or open the accommodation cavity (111).
9. The heating component according to claim 8, wherein: The seal (160) is provided with at least one through hole (161), and one end of the heating wire (130) passes through the through hole (161) and is movably engaged with the through hole (161).
10. A battery module, characterized in that, Comprising a plurality of battery cells (210) and at least one heating component (100) according to any one of claims 1-9; the insulating member (110) is located between two adjacent battery cells (210), and the insulating member (110) is detachably connected to the battery cells (210).