Liquid cooling plate and battery module

Abstract

The utility model relates to a liquid cooling plate and battery module, wherein the liquid cooling plate comprises a current collecting seat, a liquid cooling pipe and a connecting colloid, a current collecting cavity and a mounting groove are arranged in the current collecting seat, the liquid cooling pipe is inserted in the mounting groove, the liquid cooling pipe is communicated with the current collecting cavity, and the peripheral side wall of the liquid cooling pipe and the groove wall of the mounting groove are spaced to form an accommodating cavity; and the accommodating cavity is filled with connecting colloid. According to the liquid cooling plate, when the connecting colloid is used for bonding, the current collecting seat is not limited by integral brazing and needs to be made of aluminum metal any more, injection molding, compression molding and other processes can be adopted for forming, the cost of parts and part machining is effectively reduced, and the manufacturing period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling, in particular to a liquid cooling plate and a battery module. Background Art

[0002] At present, cylindrical battery cells are mainly cooled by liquid cooling. The liquid cooling module includes multiple serpentine tubes. The multiple serpentine tubes are brazed through the current collecting seats on both sides to form a serpentine tube module, so that the liquid cooling channel in the serpentine tube is connected with the confluence cavity in the current collecting seat, and the confluence cavity then exchanges heat with the outside through the joint. Each serpentine tube is arranged on the side of the cylindrical battery cell to realize liquid cooling.

[0003] In the prior art, in order to ensure the processing accuracy of the sealed connection at the welding point, the material of the collector must be aluminum to meet the requirements of normal integrated brazing. However, the collector has a complex structure, and the metal collector needs to be formed by machining. The machining production cycle is long, the processing cost is high, and the brazing connection operation is complicated, time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a liquid cooling plate and a battery module, which are easy to produce, effectively reduce the production costs of the liquid cooling plate and the battery module, and shorten the manufacturing cycle.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In a first aspect, a liquid cooling plate is provided, comprising a current collecting seat, a liquid cooling tube and a connecting colloid, wherein a collecting cavity and a mounting groove are arranged in the current collecting seat, the liquid cooling tube is inserted in the mounting groove, the liquid cooling tube is connected with the collecting cavity, and an accommodating cavity is formed between the outer peripheral side wall of the liquid cooling tube and the groove wall of the mounting groove, and the connecting colloid is filled in the accommodating cavity.

[0007] As a preferred solution for the liquid cooling plate, the bottom of the installation groove is provided with a connecting port communicating with the confluence cavity, and the bottom of the installation groove is provided with a positioning groove recessed along the circumference of the connecting port, and the liquid cooling pipe is inserted in the positioning groove.

[0008] As a preferred solution of the liquid cooling plate, it further comprises a locking member, at least one fixing hole is oppositely arranged on two groove walls of the installation groove, and the locking member passes through the fixing hole and abuts against the liquid cooling tube.

[0009] As a preferred solution of the liquid cooling plate, it also includes a positioning block, and a first limiting groove is recessed on two opposite groove walls of the installation groove, and the length of the first limiting groove extends along the groove depth direction of the installation groove. The positioning block is inserted into the first limiting groove, and the side of the positioning block away from the bottom of the first limiting groove abuts against the liquid cooling tube.

[0010] As a preferred solution of the liquid cooling plate, the positioning block has an inclined surface, and the inclined surface is inclined from an end away from the central axis of the installation groove toward an end adjacent to the central axis of the installation groove and toward the bottom of the installation groove.

[0011] As a preferred solution of the liquid cooling plate, the connecting colloid includes a sealant; or,

[0012] The connecting colloid includes a potting glue; or,

[0013] The connecting colloid includes a sealant and a potting glue. The sealant is located on a side of the accommodating cavity adjacent to the bottom of the mounting groove, and the potting glue is located on a side of the accommodating cavity adjacent to the notch of the mounting groove.

[0014] As a preferred solution of the liquid cooling plate, the liquid cooling plate further comprises a sealing ring, the sealing ring is sleeved on the outer circumference of the liquid cooling tube, and a side of the sealing ring away from the liquid cooling tube abuts against a groove wall of the installation groove.

[0015] As a preferred solution of the liquid cooling plate, the resilience of the sealing ring is F, Where m is the mass of the liquid cooling tube, g is the acceleration of gravity, k is the safety factor, and μ is the friction coefficient.

[0016] As a preferred solution of the liquid cooling plate, a second limiting groove is provided on the groove wall of the mounting groove, and the second limiting groove is arranged in a ring shape around the central axis of the mounting groove, and the sealing ring is clamped in the second limiting groove.

[0017] In a second aspect, a battery module is provided, comprising a battery and the liquid cooling plate applied thereto, wherein the liquid cooling plate is bonded to the battery.

[0018] The beneficial effects of the embodiments of the utility model are as follows: by using the connecting colloid to bond the collector seat and the liquid cooling tube, the operation is simple, time-saving and labor-saving, and the connection efficiency of the collector seat and the liquid cooling tube is improved, and the connecting colloid has good sealing performance, which can ensure the sealing effect of the connection between the collector seat and the liquid cooling tube; when using the connecting colloid for bonding, the collector seat is no longer restricted by integral brazing and must be made of aluminum metal, and can be formed by other processes such as injection molding and compression molding, effectively reducing the cost of parts and part processing, and shortening the manufacturing cycle; through the setting of the positioning groove, on the one hand, the accuracy of the connection position of the liquid cooling tube can be guaranteed, and on the other hand, the abutment surface between the liquid cooling tube and the collector seat can be increased, thereby improving the sealing performance of the connection between the liquid cooling tube and the collector seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below based on the drawings and embodiments.

[0020] Figure 1This is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present utility model.

[0021] Figure 2 A partial cross-sectional view of a liquid cooling plate according to an embodiment of the present invention Figure 1 .

[0022] Figure 3 A partial cross-sectional view of a liquid cooling plate according to an embodiment of the present invention Figure 2

[0023] Figure 4 A partial cross-sectional view of a liquid cooling plate according to an embodiment of the present invention Figure 3 .

[0024] Figure 5 A partial cross-sectional view of a liquid cooling plate according to an embodiment of the present invention Figure 4 .

[0025] Figure 6 A partial cross-sectional view of the current collecting seat of the utility model embodiment Figure 5 .

[0026] In the figure:

[0027] 1. Current collecting seat; 11. Current collecting chamber; 12. Mounting groove; 13. Positioning groove; 14. First limiting groove; 15. Liquid through port; 2. Liquid cooling pipe; 21. Liquid cooling channel; 3. Accommodating chamber; 4. Positioning block; 5. Sealing ring; 6. Male connector. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] like Figure 1 , Figure 3 and Figure 6 As shown, the liquid cooling plate of the utility model embodiment includes a collector 1, a liquid cooling tube 2 and a connecting colloid. The collector 1 is provided with a confluence cavity 11 and a mounting groove 12. The liquid cooling tube 2 is inserted into the mounting groove 12. The liquid cooling tube 2 is connected with the confluence cavity 11, and the outer peripheral side wall of the liquid cooling tube 2 and the groove wall of the mounting groove 12 are separated to form a receiving cavity 3. The receiving cavity 3 is filled with a connecting colloid, and the connecting colloid connects the liquid cooling tube 2 with the collector 1.

[0032] It can be understood that, in the initial state, the collector 1 is first placed with the notch of the mounting groove 12 facing upward, and then the liquid cooling tube 2 is inserted into the positioning groove 13 through the mounting groove 12 in the vertical direction, so that the periphery of the liquid cooling tube 2 is in contact with the groove wall of the positioning groove 13, and the end of the liquid cooling tube 2 is tightly pressed against the groove bottom of the positioning groove 13. Finally, the operator injects the flowing connecting colloid into the accommodating cavity 3 until the connecting colloid is flush with the notch position of the mounting groove 12, and waits for a certain period of time for the flowing connecting colloid to solidify, so as to complete the bonding of the liquid cooling tube 2 and the collector 1. By using a connecting colloid to bond the current collector 1 to the liquid cooling tube 2, the operation is simple, time-saving and labor-saving, and the connection efficiency of the current collector 1 and the liquid cooling tube 2 is improved. The connecting colloid has good sealing performance, and there will be no cold welding or weld oxidation, which can ensure the sealing effect of the connection between the current collector 1 and the liquid cooling tube 2. When the connecting colloid is used for bonding, the current collector 1 is no longer restricted by integral brazing and must be made of aluminum metal. It can be formed by other processes such as injection molding and compression molding. The cost of plastic is low, which effectively reduces the cost of parts and part processing and shortens the manufacturing cycle.

[0033] Furthermore, the bottom of the installation groove 12 is provided with a communication port communicating with the confluence cavity 11, and the bottom of the installation groove 12 is provided with a positioning groove 13 recessed along the circumference of the communication port, and the liquid cooling tube 2 is inserted into the positioning groove 13. Through the provision of the positioning groove 13, on the one hand, the accuracy of the connection position of the liquid cooling tube 2 can be ensured, and on the other hand, the abutment surface between the liquid cooling tube 2 and the collector seat 1 can be increased, thereby improving the sealing of the connection between the liquid cooling tube 2 and the collector seat 1.

[0034] Optionally, the collector seat 1 has a compact structure, so the depth of the positioning groove 13 is limited. When the liquid cooling tube 2 is inserted into the positioning groove 13, the groove depth of the positioning groove 13 is much smaller than the length of the liquid cooling tube 2, and the positioning groove 13 may be tilted or even scratched. The liquid cooling plate also includes a locking member, and fixing holes are provided on the two opposite groove walls of the installation groove 12. The locking member is screwed through the fixing holes to abut against the liquid cooling tube 2. In this embodiment, the locking member can be a bolt. After the liquid cooling tube 2 is inserted into the positioning groove 13, the bolts on the opposite sides of the liquid cooling tube 2 are screwed respectively so that the bolts pass through the fixing holes to abut against the liquid cooling tube 2, thereby strengthening the connection stability of the liquid cooling tube 2 and reducing the occurrence of the liquid cooling tube 2 being separated from the positioning groove 13. The installation position of the liquid cooling tube 2 is limited by the locking member, and the liquid cooling tube 2 is supported by multi-point abutment to ensure the structural support of the connection of the liquid cooling tube 2.

[0035] Preferably, the fixing holes on the two opposite groove walls of the installation groove 12 correspond to each other one by one, that is, the central axes of the bolts on the opposite sides of the liquid cooling tube 2 are collinear, which can ensure that the direction of the force when the bolts and the liquid cooling tube 2 are pressed together is consistent, thereby enhancing the connection stability of the liquid cooling tube 2. In addition, a connecting hole can be provided on the liquid cooling tube 2 relative to the position of the fixing hole, and the bolt is inserted into the connecting hole, which effectively prevents the displacement of the liquid cooling tube 2 and enhances the installation stability of the liquid cooling tube 2.

[0036] In this embodiment, if Figure 2 , Figure 4 and Figure 6 As shown, the liquid cooling plate further includes a positioning block 4, and first limiting grooves 14 are recessed on two opposite groove walls of the mounting groove 12. The length of the first limiting groove 14 extends along the groove depth direction of the mounting groove 12. The positioning block 4 is inserted into the first limiting groove 14, and the groove bottom side of the positioning block 4 away from the first limiting groove 14 abuts against the liquid cooling tube 2. It can be understood that the length of the positioning block 4 also extends along the depth direction of the mounting groove 12, and the abutment limitation of the positioning block 4 on the liquid cooling tube 2 effectively enhances the installation stability of the liquid cooling tube 2, and the abutment area of ​​the positioning block 4 and the liquid cooling tube 2 is large, and the stability is good.

[0037] Optionally, the positioning block 4 has an inclined surface, and the inclined surface is inclined from one end away from the central axis of the installation groove 12 toward one end adjacent to the central axis of the installation groove 12 and toward the bottom of the installation groove. After the positioning block 4 is pre-installed in the first limiting groove 14, the liquid cooling tube 2 is inserted into the positioning groove 13 along the inclined surface. The setting of the inclined surface effectively improves the guidance of the liquid cooling tube 2 during installation, and enhances the positioning accuracy of the installation of the liquid cooling tube 2.

[0038] In some embodiments, the connecting colloid includes a sealant or a potting compound, and the sealant or the potting compound is used to seal the connection between the liquid cooling tube 2 and the current collector 1, thereby effectively enhancing the sealing of the connection between the liquid cooling tube 2 and the current collector 1. Of course, sealant and potting compound can also be used at the same time. In this case, the sealant is located on the bottom side of the accommodating cavity 3 adjacent to the mounting groove 12, and the potting compound is located on the notch side of the accommodating cavity 3 adjacent to the mounting groove 12. The sealant has good sealing performance, and the potting compound has good structural bonding performance. The best connection effect is achieved by connecting along the depth of the mounting groove 12 at a ratio of 3:5 between the sealant and the potting compound, which can ensure both the sealing of the connection between the liquid cooling tube 2 and the current collector 1 and the connection strength of the connection between the liquid cooling tube 2 and the current collector 1.

[0039] Alternatively, if Figure 3 and Figure 5 As shown, the liquid cooling plate further includes a sealing ring 5, which is sleeved on the outer periphery of the liquid cooling tube 2, and the side of the sealing ring 5 away from the liquid cooling tube 2 abuts against the groove wall of the installation groove 12. The sealing ring 5 is provided to effectively strengthen the sealing between the liquid cooling tube 2 and the collector 1, and the sealing ring 5 has a certain structural strength, which can support the liquid cooling tube 2 and effectively improve the installation stability of the connection of the liquid cooling tube 2. That is, the form of sealant and sealing ring 5, potting glue and sealing ring 5, or sealant, potting glue and sealing ring 5 can be adopted.

[0040] Furthermore, the resilience of the sealing ring 5 is F, Where m is the mass of the liquid cooling tube 2, g is the acceleration of gravity, k is the safety factor, and μ is the friction coefficient. For example, g is usually 9.8N / KG, the safety factor k is 3, and the liquid cooling tube 2 is usually made of aluminum, that is, the friction coefficient between the liquid cooling tube 2 and the sealing ring 5 is 0.28, then when F is greater than 105mN, the sealing ring 5 can ensure the stability of the sealed connection between the liquid cooling tube 2 and the collector 1. In addition, the rebound strength σ of the sealing ring 5 can also be calculated. At the same time, the stability of the sealed connection between the liquid cooling tube 2 and the collector 1 can be ensured, and S is the contact area between the sealing ring 5 and the liquid cooling tube 2.

[0041] Preferably, a second limiting groove is provided on the groove wall of the installation groove 12, and the second limiting groove is provided in an annular recess around the central axis of the installation groove 12, and the sealing ring 5 is clamped in the second limiting groove. Through the provision of the second limiting groove, the position of the sealing ring 5 can be effectively limited, and the position accuracy of the connection of the sealing ring 5 can be enhanced, and the abutment of the sealing ring 5 with the groove wall and the groove bottom of the second limiting groove can further enhance the abutment area of ​​the sealing ring 5 and the collector seat 1, thereby ensuring the abutment sealing of the sealing ring 5 and the collector seat 1.

[0042] Furthermore, if Figure 1 , Figure 2 and Figure 3As shown, the liquid cooling plate also includes a male connector 6, and the collector 1 is also provided with a liquid through hole 15 communicating with the confluence cavity 11, and the liquid through hole 15 is communicated with the outside through the male connector 6. In this embodiment, a collector 1 is connected to each end of the liquid cooling tube 2 in the length direction, and a plurality of liquid cooling tubes 2 are formed at intervals on each collector 1. Liquid is introduced through the male connector 6 on the collector 1 on one side, and flows from the confluence cavity 11 to each liquid cooling tube 2, so that the liquid cooling tube 2 performs surface heat exchange with the battery, and then flows to the collector 1 on the other side for liquid discharge. , to complete the liquid cooling function of the liquid cooling plate; the length of the liquid cooling tube 2 extends along the first direction, and a plurality of liquid cooling channels 21 are arranged in the liquid cooling tube 2 at intervals along the second direction, and the liquid cooling channels 21 are connected to the confluence cavity 11. By setting a plurality of liquid cooling channels 21, the cooling uniformity of the liquid cooling tube 2 along the second direction can be effectively improved, thereby ensuring the cooling effect of each position of the battery; the liquid cooling tube 2 is a serpentine tube, and the liquid cooling groove formed by the recessed parts of two adjacent serpentine tubes can place cylindrical batteries to realize heat exchange liquid cooling of the cylindrical batteries.

[0043] An embodiment of the utility model also provides a battery module, including a battery and a liquid cooling plate using any of the above embodiments, wherein the liquid cooling plate is bonded to the battery and is used to exchange heat with the battery to cool the battery, thereby ensuring the safety of the battery and thus ensuring the service life of the battery module.

[0044] In the description of this article, it is necessary to understand that the terms "upper", "lower", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, 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 therefore cannot be understood as a limitation on the present invention.

[0045] In the description of this specification, the description of reference term "an embodiment" etc. means that the specific features, structures, materials or characteristics of the embodiment are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment.

[0046] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0047] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that: It includes a collecting seat, a liquid cooling tube and a connecting colloid. The collecting seat is provided with a collecting cavity and a mounting groove. The liquid cooling tube is inserted in the mounting groove. The liquid cooling tube is connected with the collecting cavity. The outer peripheral side wall of the liquid cooling tube and the groove wall of the mounting groove are separated to form a accommodating cavity. The connecting colloid is filled in the accommodating cavity.

2. The liquid cooling plate according to claim 1, characterized in that: The bottom of the installation groove is provided with a communication port communicating with the confluence cavity, and the bottom of the installation groove is provided with a positioning groove recessed along the circumference direction of the communication port, and the liquid cooling pipe is inserted in the positioning groove.

3. The liquid cooling plate according to claim 2, characterized in that: It also includes a locking piece. At least one fixing hole is oppositely arranged on two groove walls of the installation groove. The locking piece passes through the fixing hole and abuts against the liquid cooling pipe.

4. The liquid cooling plate according to claim 2, characterized in that: It also includes a positioning block, and a first limiting groove is recessed on two opposite groove walls of the installation groove. The length of the first limiting groove extends along the groove depth direction of the installation groove. The positioning block is inserted into the first limiting groove, and the side of the positioning block away from the bottom of the first limiting groove abuts against the liquid cooling tube.

5. The liquid cooling plate according to claim 4, characterized in that: The positioning block has an inclined surface, and the inclined surface is inclined from an end away from the central axis of the installation groove toward an end adjacent to the central axis of the installation groove and toward the groove bottom direction of the installation groove.

6. The liquid cooling plate according to any one of claims 1 to 5, characterized in that: The connecting colloid comprises a sealant; or, The connecting colloid includes a potting glue; or, The connecting colloid includes a sealant and a potting glue. The sealant is located on a side of the accommodating cavity adjacent to the bottom of the mounting groove, and the potting glue is located on a side of the accommodating cavity adjacent to the notch of the mounting groove.

7. The liquid cooling plate according to claim 6, characterized in that: It also includes a sealing ring, which is sleeved on the outer periphery of the liquid cooling tube, and a side of the sealing ring away from the liquid cooling tube abuts against the groove wall of the installation groove.

8. The liquid cooling plate according to claim 7, characterized in that: The resilience of the sealing ring is F, Where m is the mass of the liquid cooling tube, g is the acceleration of gravity, k is the safety factor, and μ is the friction coefficient.

9. The liquid cooling plate according to claim 7, characterized in that: A second limiting groove is arranged on the groove wall of the installation groove, and the second limiting groove is arranged in an annular shape around the central axis of the installation groove, and the sealing ring is clamped in the second limiting groove.

10. A battery module, characterized in that: The invention comprises a battery and a liquid cooling plate according to any one of claims 1 to 9, wherein the liquid cooling plate is bonded to the battery.

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