Liquid passing structure for battery cover plate
By employing a liquid-passing structure that matches the limiting clips and slots between lithium battery cells, the problems of low cooling efficiency and complex integration caused by coolant pipe connections are solved, achieving efficient cooling and low-cost improvement in battery system energy density.
Patent Information
- Application Number
- CN202520294174.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-24
AI Technical Summary
In existing lithium battery cell integration, the coolant is connected through pipes, resulting in low cooling efficiency and poor performance, which affects the energy density of the battery system. The integration process is also complex and costly.
The battery cover adopts a liquid-passing structure, including a mounting base and a liquid-passing structure body. Through the matching design of the limiting strip and the slot, the coolant can be directly conducted between adjacent cells, simplifying the integration operation.
It improves the cooling efficiency of the coolant, saves integration space, increases system energy density, reduces integration costs, and improves operational efficiency.
Smart Images
Figure CN223693213U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lithium battery assembly technical field, especially a battery cover plate is with liquid structure. BACKGROUND
[0002] The thermal management of lithium battery cell is crucial for the performance and safety of lithium battery. In order to improve the liquid cooling effect and fundamentally realize the thermal management of the battery, when the existing cell is integrated, the current collectors of two adjacent cells usually need to be connected by a pipeline to realize the conduction of the cooling liquid. The pipeline setting not only adversely affects the cooling efficiency and effect of the cooling liquid, but also occupies limited battery space, which is not conducive to the improvement of the energy density of the battery system. Moreover, such a design structure also has problems of complex integration process, low integration efficiency, high integration cost and the like when the cell is integrated subsequently. Therefore, the present application is proposed. SUMMARY
[0003] In view of the problems of low cooling efficiency, poor effect, not conducive to the improvement of the energy density of the battery system and complex integration process, low integration efficiency, high integration cost and the like caused by the need for connection between the cover plates by a pipeline to realize the conduction of the cooling liquid when the cell is integrated in the prior art, the utility model provides a battery cover plate liquid passing structure.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:
[0005] A battery cover plate liquid passing structure, comprising a mounting seat and a liquid passing structure body, the mounting seat comprises an annular enclosure and a slot is formed on the side wall of the enclosure, the liquid passing structure body is provided with a through liquid flow channel, the liquid flow channel is distributed along the height direction of the liquid passing structure body and the side wall of the liquid passing structure body is provided with a limiting clamping strip which is elastically stretched and contracted with the liquid passing structure body; the outer periphery of the liquid passing structure body matches the inner periphery structure of the enclosure, the position and structure of the limiting clamping strip match the slot, when the liquid passing structure body is inserted into the enclosure, the limiting clamping strip gradually enters the slot, so that the liquid passing structure body and the mounting seat can be detachably and sealingly inserted.
[0006] Preferably, the cross section of the enclosure is in a runway shape structure, the liquid flow channel has a plurality of liquid flow channels, and the plurality of liquid flow channels are arranged in a "one" shape in the length direction of the liquid passing structure body.
[0007] Preferably, the runway shape structure comprises two opposite straight line segments and two opposite arc line segments, the slot is in a strip shape and has two slots, the two slots are oppositely arranged and formed on the side wall of the straight line segment, and the upper surface of the limiting clamping strip is a smooth arc surface or an inclined surface.
[0008] Preferably, the length of each straight line segment is L1, the length of the slot is L2, and L1, L2 satisfy: 10mm≤L2≤L1<250mm.
[0009] Preferably, the thickness of the enclosure is T1, the width of the limiting strip is W4, T1 and W4 satisfy: 1mm≤T1≤5mm, T1
[0010] Preferably, a step I is arranged around the lower part of the inner wall of the enclosure, the liquid passing structure body comprises an insertion block I and an insertion block II, the insertion block II is fixed to the upper surface of the insertion block I and a clamping step is formed at the connection of the insertion block I and the insertion block II, the clamping step is matched with the step I in structure, and the limiting strip is arranged on the side wall of the insertion block I.
[0011] Preferably, the height of the insertion slot is H3, the height of the insertion block II is H2, the total height of the insertion block I and the insertion block II is H1, H1, H2 and H3 satisfy: 1mm<H1<30mm, 0≤H2≤0.5H1, 1mm<H3<0.5H1.
[0012] Preferably, the outer width of the enclosure is W1, the inner width of the enclosure is W2, the inner width of the step I is W3, W1, W2 and W3 satisfy: 10mm<W1<250mm, 10mm<W2<W1, 10mm<W3<W2.
[0013] Preferably, a sealing ring is arranged on the step I.
[0014] Preferably, the enclosure and the step I are integrated structures, and the insertion block I and the insertion block II are integrated structures.
[0015] Compared with the prior art, the liquid passing structure for the battery cover plate is provided with the mounting seat and the liquid passing structure body, the cooling liquid can be conducted by inserting the two adjacent battery cells head to tail, the liquid cooling transmission path is reduced, the cooling efficiency of the cooling liquid is improved, the integrated space is saved, the energy density of the system is improved, the integrated operation is simple, the integrated efficiency is high, and the integrated cost is low. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0017] Figure 1 An embodiment of the liquid passing structure for the battery cover plate is provided.
[0018] Figure 2 For Figure 1 The mounting seat in the liquid passing structure is shown in the perspective structure diagram Figure 1 ;
[0019] Figure 3 Fig. 4 is a perspective view of the mounting seat in the liquid-passing structure shown in Fig. 1; Figure 1 Figure 2 ;
[0020] Figure 4 Fig. 5 is a front view of the mounting seat shown in Fig. 4; Figure 2
[0021] Figure 5 Fig. 6 is a top view of the mounting seat shown in Fig. 4; Figure 2
[0022] Figure 6 Fig. 7 is a perspective view of the liquid-passing structure body in the liquid-passing structure shown in Fig. 1; Figure 1 Figure 1 ;
[0023] Figure 7 Fig. 8 is a perspective view of the liquid-passing structure body shown in Fig. 7; Figure 1 Figure 2 ;
[0024] Figure 8 Fig. 9 is a top view of the liquid-passing structure body shown in Fig. 7; Figure 6
[0025] Figure 9 Fig. 10 is a bottom view of the liquid-passing structure body shown in Fig. 7; Figure 6
[0026] Figure 10 Fig. 11 is a front view of the liquid-passing structure body shown in Fig. 7; Figure 6
[0027] Figure 11 Fig. 12 is a left view of the liquid-passing structure body shown in Fig. 7. Figure 6 In the figure: C, mounting seat; C1, enclosure; C2, step I; C3, sealing ring; C4, insertion slot; D, liquid-passing structure body; D1, insertion block I; D2, insertion block II; D21, liquid flow channel; D3, limiting clamping strip.
[0028] DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0029] It should be noted that: the components or structures not described in detail below all use conventional technical means in the art. Those skilled in the art can combine and use them without creative labor.
[0030] It should be noted that: the components or structures not described in detail below all use conventional technical means in the art. Those skilled in the art can combine and use them without creative labor.
[0031] As Figures 1-11 The utility model discloses a battery cover plate liquid passing structure, including mounting seat C and liquid passing structure body D, mounting seat C includes a ring-shaped enclosure C1 and is set with the slot C4 on the side wall of enclosure C1, and the liquid flow channel D21 is arranged in liquid passing structure body D, and the liquid flow channel D21 is distributed with a plurality of along the height direction of liquid passing structure body D and is provided with the elastic expansion and contraction limiting clamping strip D3 on the side wall of liquid passing structure body D, the outer periphery of liquid passing structure body D and the inner periphery structure of enclosure C1 match, and the position and structure of limiting clamping strip D3 and the slot C4 match, when liquid passing structure body D is inserted into enclosure C1, limiting clamping strip D3 gradually enters the slot C4, and liquid passing structure body D and mounting seat C can be detachable and sealed insertion.
[0032] Need to explain: the connecting relationship between limiting clamping strip D3 and the side wall of liquid passing structure body D is prior art.
[0033] Specific application, the cooling core rod is set up in the electric core, and the liquid cooling channel is set up in the cooling core rod, and the two through holes are set up on the battery positive cover plate and the battery negative cover plate, the mounting seat C is set up on one through hole, and the liquid passing structure body D is set up on the other through hole, and the mounting seat C, the liquid cooling channel and the liquid passing structure body D are communicated. The battery is integrated, and the two electric cores are arranged side by side, and the negative cover plate of the latter electric core is directly inserted into the mounting seat C of the positive cover plate of the former electric core through the liquid passing structure body D, so that the conduction of the cooling liquid is realized when the plurality of electric cores arranged side by side are connected in series.
[0034] In order to timely and effectively collect and distribute the cooling liquid, the position and structure of the liquid flow channel D21 are designed according to specific conditions in practice. For example, when the utility model is used for the battery cell described in the background art, the structure, position and number of the liquid flow channel D21 are preferably matched with the structure, position and number of the liquid cooling flow channel on the core rod, that is, the cross section of the liquid flow channel D21 is preferably in a long strip structure, and the long direction of the long strip structure is the same as the long direction of the liquid passing structure body D, and the corner of the long strip structure is in a circular arc transition, which helps to ensure that the cooling liquid is timely collected and redistributed to flow into the next battery cell uniformly, quickly and efficiently. As a preferred technical solution, in another embodiment of the utility model, the runway-shaped structure includes two opposite straight line segments and two opposite arc line segments, the slot C4 is in a long strip shape and the number is 2, the two slots C4 are oppositely arranged and are arranged on the side wall of the straight line segment, and the upper surface of the limiting clamping strip D3 is a smooth arc surface or an inclined surface.
[0035] It should be noted that the number and structure of the slot C4 are not limited to the case listed in the embodiment. In specific practice, the number of the slot C4 can also be increased by several, and is preferably in a symmetrical structure; the structure of the slot C4 can also be a square or other structures. In the embodiment, in order to correspond to the structure and number of the slot C4, the limiting clamping strip D3 is also in a long strip shape and the number is 2. In order to improve the smoothness and silkiness when the limiting clamping strip D3 enters the slot C4, the upper surface of the limiting clamping strip D3 is a smooth arc surface or an inclined surface, when the liquid passing structure body D is inserted into the mounting seat C, the extrusion force indirectly acts on the arc surface or the inclined surface, so that the limiting clamping strip D3 gradually stretches until the liquid passing structure body D is completely inserted into the mounting seat C, and then the limiting clamping strip D3 returns to the original state and expands in the slot C4, so that the liquid passing structure body D is stably installed in the mounting seat C without loosening or falling off.
[0036] Based on the common size of the conventional square battery cover plate, the smooth entry of the limiting clamping strip D3 into the slot C4, and the structural stability of the surrounding fence C1 after the slot C4 is arranged, as a preferred technical solution, in another embodiment of the utility model, the length of each straight line segment is L1, the length of the slot C4 is L2, and L1, L2 satisfy: 10mm≤L2≤L1<250mm.
[0037] As a preferred technical solution, in another embodiment of the utility model, the thickness of the surrounding fence C1 is T1, the width of the limiting clamping strip D3 is W4, T1, W4 satisfy: 1mm≤T1≤5mm, T1W4≤5mm.
[0038] In order to ensure the safety of the liquid and improve the stability after the plug-in, the thickness of the enclosure C1 is preferably set between 1mm-5mm. In addition, the thickness T1 of the enclosure C1 determines the extension length of the slot C4 in the transverse direction, in order to ensure the stability and safety of the liquid structure body D and the mounting seat C after the plug-in, the width W4 of the limiting clamping strip D3 is greater than the thickness T1 of the enclosure C1, so as to ensure that the edge of the limiting clamping strip D3 extends to the outside of the slot C4, prevents the liquid structure body D from being pulled out from the mounting seat C due to accidental contact or accidental situation, and then causes the liquid leakage or battery safety problem.
[0039] As a preferred technical solution, in another embodiment of the utility model, the inner wall of the enclosure C1 is provided with a step IC2 around the lower part, the liquid structure body D includes an insertion block ID1 and an insertion block II D2, the insertion block II D2 is fixed to the upper surface of the insertion block ID1 and forms a clamping step with the connection of the insertion block ID1, the clamping step is matched with the step IC2 structure, and the limiting clamping strip D3 is arranged on the side wall of the insertion block ID1 and the length direction is consistent with the length direction of the insertion block ID1.
[0040] In the embodiment, after the liquid structure body D is inserted into the mounting seat C, the clamping step cooperates with the step IC2, which provides a clear assembly direction and positioning point, makes the assembly and disassembly process simpler and faster, can reduce the gap after the plug-in and limit the relative displacement of the two, reduces the risk of loosening and falling off, and improves the reliability of the connection.
[0041] As a preferred technical solution, in another embodiment of the utility model, the height of the slot C4 is H3, the height of the insertion block II D2 is H2, the total height H1 of the insertion block ID1 and the insertion block II D2, H1, H2, H3 satisfy: 1mm<H1<30mm, 0≤H2≤0.5H1, 1mm<H3<0.5H1.
[0042] Specifically, after the liquid structure body D is inserted into the mounting seat C, the insertion block II D2 is located in the cavity surrounded by the annular step IC2, and the insertion block ID1 is located in the cavity formed by the enclosure C1 above the step IC2, the higher the height of the insertion block ID1, the more helpful to improve the stability of the liquid structure body D and the mounting seat C after the plug-in, therefore H2 should not exceed half of the total height H1 of the liquid structure body D.
[0043] Further, in order to facilitate the limiting clamping strip D3 to smoothly enter the slot C4 after the extrusion force disappears, the height H3 of the slot C4 is preferably greater than 1mm, and in order to avoid the influence of the too high on the structural firmness of the enclosure C1, H3 is preferably controlled within half of the total height H1 of the liquid structure body D.
[0044] As a preferred technical scheme, in a further embodiment of the utility model, the outer width of the fence C1 is W1, the inner width is W2, the inner width of the step IC2 is W3, and W1, W2 and W3 satisfy: 10mm < W1 < 250mm, 10mm < W2 < W1, and 10mm < W3 < W2.
[0045] In order to further improve the sealing performance of the liquid passing structure body D and the mounting seat C after being plugged, as a preferred technical scheme, in a further embodiment of the utility model, a sealing ring C3 is arranged on the step IC2 to avoid leakage when the cooling liquid flows through; the material of the sealing ring C3 can be nitrile rubber, fluorine rubber, propylene rubber, chlorobutyl rubber, ethylene propylene rubber, hydrogenated nitrile rubber, silicone rubber and perfluoroether, etc.
[0046] In order to facilitate processing and improve the stability of the liquid passing structure body D and the mounting seat C after being connected, as a preferred technical scheme, in another embodiment of the utility model, the fence C1 and the step IC2 are integrated structures, and the plug block ID1 and the plug block II D2 are integrated structures.
[0047] In summary, the liquid passing structure for the battery cover plate proposed by the utility model can realize the conduction of the cooling liquid by head-to-tail quick plugging between the battery cells, which reduces the liquid cooling transmission path, improves the cooling efficiency of the cooling liquid, saves the integrated space, improves the energy density of the system, reduces the process difficulty of the battery cell grouping, reduces the use of other connecting parts, and has the advantages of simple integrated operation, high integrated efficiency, low integrated cost and high yield.
[0048] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can modify, modify, replace and deform the above embodiments within the scope of the utility model. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without mutual contradiction.
Claims
1. A through-liquid structure for a battery cover plate, characterized by: The application relates to a liquid-passing structure, which comprises a mounting seat (C) and a liquid-passing structure body (D), the mounting seat (C) comprises a ring-shaped enclosure (C1), and a slot (C4) is formed in the side wall of the enclosure (C1); the liquid-passing structure body (D) is internally provided with a plurality of penetrating liquid flow channels (D21) which are distributed along the height direction of the liquid-passing structure body (D) and are provided with a limiting clamping strip (D3) which is elastically stretched and contracted on the side wall of the liquid-passing structure body (D); the outer periphery of the liquid-passing structure body (D) is matched with the inner periphery structure of the enclosure (C1), the limiting clamping strip (D3) is matched with the position and structure of the slot (C4), and when the liquid-passing structure body (D) is inserted into the enclosure (C1), the limiting clamping strip (D3) gradually enters the slot (C4) so that the liquid-passing structure body (D) and the mounting seat (C) can be detachably and sealingly inserted.
2. The battery cover plate through liquid structure according to claim 1, characterized in that: The cross section of the enclosure (C1) is in a runway shape, and the liquid flow channels (D21) are in a plurality of "I" shapes in the length direction of the liquid-passing structure body (D).
3. The battery cover plate through liquid structure according to claim 2, characterized in that: The runway shape comprises two opposite straight line segments and two opposite arc line segments, the slot (C4) is in a strip shape and has two numbers, the two slots (C4) are oppositely arranged and formed in the side wall of the straight line segment, and the upper surface of the limiting clamping strip (D3) is a smooth arc surface or an inclined surface.
4. The battery cover plate through liquid structure according to claim 3, characterized in that: The length of each straight line segment is L1, the length of the slot (C4) is L2, and L1, L2 satisfy 10mm<=L2<=L1<250mm.
5. The battery cover plate through liquid structure according to claim 3, characterized in that: The thickness of the enclosure (C1) is T1, the width of the limiting clamping strip (D3) is W4, and T1, W4 satisfy 1mm<=T1<=5mm, T1<W4<=5mm.
6. The battery cover plate through liquid structure according to claim 3, characterized in that: A step I (C2) is arranged around the lower part of the inner wall of the enclosure (C1), the liquid-passing structure body (D) comprises an insertion block I (D1) and an insertion block II (D2), the insertion block II (D2) is fixed to the upper surface of the insertion block I (D1) and forms a clamping step at the connection position of the insertion block I (D1) and the insertion block II (D2), the clamping step is matched with the step I (C2), and the limiting clamping strip (D3) is arranged on the side wall of the insertion block I (D1).
7. The battery cover plate through liquid structure according to claim 6, characterized in that: The height of the slot (C4) is H3, the height of the insertion block II (D2) is H2, the total height of the insertion block I (D1) and the insertion block II (D2) is H1, and H1, H2, H3 satisfy 1mm<H1<30mm, 0<=H2<=0.5H1, 1mm<H3<0.5H1.
8. The battery cover plate through liquid structure according to claim 6, characterized in that: The outer width of the enclosure (C1) is W1, the inner width is W2, the inner width of the step I (C2) is W3, and W1, W2, W3 satisfy 10mm<W1<250mm, 10mm<W2<W1, 10mm<W3<W2.
9. The battery cover plate through liquid structure of claim 6, wherein: A sealing ring (C3) is arranged on the step I (C2).
10. The battery cover plate through liquid structure of claim 6, wherein: The enclosure (C1) and the step I (C2) are in an integrated structure, and the insertion block I (D1) and the insertion block II (D2) are in an integrated structure.