A series liquid cooling plate for new energy batteries

Abstract

This invention discloses a series-connected liquid cooling plate for new energy batteries, comprising an upper shell and a lower shell, which are joined together. The opposite end faces of the upper and lower shells enclose a liquid cooling channel. This invention utilizes a magnetically attracted rare-earth permanent magnet material applied to the opposite end faces of the upper and lower shells to achieve automatic initial alignment during splicing, effectively avoiding misalignment of the liquid cooling channel caused by manual alignment deviations, significantly reducing assembly difficulty and time costs. Simultaneously, the continuous adsorption force of the rare-earth permanent magnet material reduces the gaps at the shell splicing surfaces. Combined with the quick-connect structure of the front and rear end caps via insert plates and rectangular slots, this not only achieves efficient positioning and installation of the end caps but also double-seales the channel openings, preventing component interference and significantly improving the overall sealing performance of the liquid cooling channel. This fundamentally reduces the risk of coolant leakage, ensures long-term stable operation of the liquid cooling plate, and lowers the probability of battery module damage due to sealing failure.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling plate technology, specifically to a series liquid cooling plate for new energy batteries. Background Technology

[0002] With the rapid development of the new energy industry, the performance and safety of new energy batteries, as core energy storage components, have attracted much attention. During the charging and discharging process, a large amount of heat is generated. If it cannot be dissipated in a timely and effective manner, it will lead to excessively high battery temperature, which in turn will cause battery capacity decay, shortened lifespan, and even safety hazards. Liquid cooling is widely used in battery thermal management systems due to its high efficiency.

[0003] Existing liquid cooling plates still have many problems in practical use. In traditional series liquid cooling plates, the coolant flows sequentially in the flow channel. The coolant at the front absorbs heat and its temperature gradually rises. As a result, the cooling capacity of the coolant decreases as it gets closer to the end of the liquid cooling plate. The heat dissipation effect varies significantly in different parts of the battery module, and the temperature difference within the battery pack is large, which affects the consistency and overall performance of the battery.

[0004] Therefore, it is necessary to provide a series liquid cooling plate for new energy batteries to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a series liquid cooling plate for new energy batteries to solve the problems existing in the background technology. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a series liquid cooling plate for new energy batteries, comprising an upper shell and a lower shell, wherein the upper shell and the lower shell are spliced ​​together, and the opposite end faces of the upper shell and the lower shell form a liquid cooling channel, and end caps are snapped onto the front and rear end faces of the upper shell and the lower shell, and heating components are equidistantly installed on the top of the lower shell along the length direction.

[0007] Preferably, the liquid cooling channel includes connecting seats equidistantly arranged on the opposite end faces of the upper and lower shells, and a serpentine channel connecting adjacent connecting seats. The first end of the serpentine channel is integrally connected to an inlet pipe extending vertically, and the last end of the serpentine channel is integrally connected to an outlet pipe extending vertically.

[0008] Preferably, the serpentine channel is composed of multiple arc-shaped curved sections spliced ​​together, and along the coolant flow direction, the inner diameter of the latter set of arc-shaped curved sections is larger than the inner diameter of the former set of arc-shaped curved sections, forming a gradually changing flow channel structure.

[0009] Preferably, the bottom of the outer wall of the liquid inlet pipe is integrally connected to a connecting pipe 1 that penetrates the bottom of the lower housing, and the top of the outer wall of the liquid outlet pipe is integrally connected to a connecting pipe 2 that penetrates the top of the upper housing. The inner diameter of the connecting pipe 2 is compatible with the outer diameter of the connecting pipe 1, thus meeting the requirements for series assembly of multiple liquid cooling plates.

[0010] Preferably, rectangular slots are provided on both the front and rear end faces of the upper and lower housings, and an insert plate that fits the slot is integrally formed on the side of the end cap facing the slot. The end cap can be quickly positioned and installed by the snap-fit ​​between the insert plate and the slot.

[0011] Preferably, the heating assembly includes mounting seats evenly distributed along the top of the lower housing, with a heating wire embedded inside the mounting seat. A mounting block is bolted to the open side of the mounting seat facing the serpentine channel, and a protective housing is integrally connected to the other end of the mounting block. The protective housing is provided with a control and protection component for controlling the working state of the heating wire and realizing overload protection. An avoidance groove adapted to the protective housing is opened on the side of the end cap facing the mounting seat.

[0012] Preferably, the sidewall of the mounting base has heat dissipation holes that penetrate the inner and outer walls of the mounting base at equal intervals along the height direction, and the heat dissipation holes are distributed in a circular array.

[0013] Preferably, both ends of the opposite end faces of the upper and lower shells are coated with rare earth permanent magnet material that attracts magnetically, which assists in splicing and positioning through magnetic adsorption and improves the sealing performance of the shell splicing.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention utilizes rare-earth permanent magnet material applied to the opposite end faces of the upper and lower shells to achieve automatic initial alignment during assembly. This effectively avoids the misalignment of the liquid cooling channels caused by manual alignment deviations, significantly reducing assembly difficulty and time costs. Simultaneously, the continuous adsorption force of the rare-earth permanent magnet material can reduce the gaps between the shell splicing surfaces. Combined with the quick-connect structure of the front and rear end caps via insert plates and rectangular slots, this not only achieves efficient positioning and installation of the end caps but also double-seals the open flow channels, preventing component interference and significantly improving the overall sealing performance of the liquid cooling channels. This reduces the risk of coolant leakage from the source, ensures the long-term stable operation of the liquid cooling plate, and lowers the probability of battery module damage due to sealing failure.

[0016] This invention's liquid cooling channel employs a multi-section, arc-shaped, curved segment splicing structure with a gradually increasing cross-sectional area along the coolant flow direction. At the channel's initial end, a small cross-sectional area design allows the coolant to achieve a high flow velocity, quickly passing through the high-temperature region of the battery module and efficiently absorbing initial heat through strong convection, preventing localized overheating. As the coolant flows, the channel's cross-sectional area gradually increases to reduce the flow velocity, extending the contact time between the coolant and the channel wall to ensure sufficient absorption of subsequent battery module heat, while also slowing the coolant temperature rise rate to prevent overheating at the channel's end. This design overcomes the limitations of traditional uniform cross-section channels in terms of uneven heat dissipation, significantly improving the heat dissipation uniformity throughout the entire liquid cooling unit. It effectively controls temperature differences across different areas of the battery module, avoiding problems such as battery capacity decay and shortened cycle life caused by localized high temperatures, ensuring the battery remains within its optimal operating temperature range for extended periods, and improving overall performance stability.

[0017] The invention features heating components evenly spaced along the length of the top of the lower housing. When the battery is in a low-temperature environment, an external power source powers the heating wires embedded in the mounting base. The heat generated by the heating wires is rapidly diffused into the housing through a circular array of heat dissipation holes, efficiently exchanging heat with the coolant in the serpentine channel. The heated coolant circulates along the flow channel, directly contacting the battery module through the channel wall, uniformly transferring heat to each battery cell, achieving rapid preheating or low-temperature insulation of the battery. This function effectively solves the pain points of battery capacity decay and difficulty in starting at low temperatures, making the liquid cooling plate suitable not only for high-temperature heat dissipation scenarios but also for battery temperature control requirements in cold regions or during low-temperature startup. This significantly expands the applicable environmental range of the liquid cooling plate, ensuring the normal operation of new energy batteries across the entire temperature range and improving the environmental adaptability and reliability of new energy equipment. Attached Figure Description

[0018] Figure 1 This is a perspective view of multiple sets of liquid cooling plates connected in series according to the present invention;

[0019] Figure 2 The three-dimensional liquid cooling plate of the present invention Figure 1 ;

[0020] Figure 3 The three-dimensional liquid cooling plate of the present invention Figure 2 ;

[0021] Figure 4 This is a three-dimensional structural diagram of the present invention, showing the end cap separated from the upper and lower housings.

[0022] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the explosion separation structure of the present invention;

[0024] Figure 7 This is a top view of the lower housing structure of the present invention;

[0025] Figure 8 This is a front view structural diagram of the present invention;

[0026] Figure 9 For the present invention Figure 8 Enlarged view of section B in the middle.

[0027] In the diagram: 1. Upper shell; 2. Lower shell; 3. Liquid cooling channel; 301. Connecting seat; 302. Serpentine channel; 303. Liquid inlet pipe; 304. Liquid outlet pipe; 4. End cap; 5. Heating assembly; 501. Mounting seat; 502. Heating wire; 503. Mounting block; 504. Protective shell; 505. Groove; 6. Connecting pipe one; 7. Connecting pipe two; 8. Slot; 9. Insert plate; 10. Heat dissipation hole. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0030] Please see Figure 1-9A new energy battery series liquid cooling plate includes an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are spliced ​​together. The opposite end faces of the upper shell 1 and the lower shell 2 form a liquid cooling channel 3. The front and rear end faces of the upper shell 1 and the lower shell 2 are both snapped with end caps 4. Heating components 5 are installed at equal intervals along the length direction on the top of the lower shell 2.

[0031] like Figure 1-9 As shown, the liquid cooling channel 3 includes connecting seats 301 equidistantly arranged on the opposite end faces of the upper shell 1 and the lower shell 2. A serpentine channel 302 is connected between adjacent connecting seats 301. The first end of the serpentine channel 302 is integrally connected to an inlet pipe 303 extending vertically, and the end of the serpentine channel 302 is integrally connected to an outlet pipe 304 extending vertically. The serpentine channel 302 is a top-to-bottom splicing structure, and the splicing of the serpentine channel 302 is achieved after the upper shell 1 and the lower shell 2 are spliced ​​together.

[0032] like Figure 1-9 As shown, the serpentine channel 302 is composed of multiple arc-shaped curved sections spliced ​​together. Along the coolant flow direction, the inner diameter of the later set of arc-shaped curved sections is larger than that of the earlier set, forming a gradually changing flow channel structure. Each liquid cooling channel 3 adopts a variable cross-section design. Along the coolant flow direction, the cross-sectional area of ​​the later set of arc-shaped curved sections gradually increases compared to the earlier set. At the coolant inlet, the cross-sectional area of ​​the channel is smaller, giving the coolant a higher flow velocity and enhancing the coolant's heat absorption capacity in the initial section. As the coolant flows in the channel and absorbs heat, the cross-sectional area of ​​the channel gradually increases, reducing the coolant flow velocity and slowing down its temperature rise. At the same time, it increases the contact time between the coolant and the channel wall, ensuring that the coolant can fully absorb the heat generated by the battery module throughout the entire liquid cooling unit, thereby achieving a more uniform heat dissipation effect.

[0033] like Figure 1-9 As shown, the bottom of the outer wall of the liquid inlet pipe 303 is integrally connected to a connecting pipe 6 that penetrates the bottom of the lower housing 2, and the top of the outer wall of the liquid outlet pipe 304 is integrally connected to a connecting pipe 7 that penetrates the top of the upper housing 1. The inner diameter of the connecting pipe 7 is adapted to the outer diameter of the connecting pipe 6, which meets the requirements for the series assembly of multiple liquid cooling plates. By adapting the inner diameter of the connecting pipe 7 to the outer diameter of the connecting pipe 6, the liquid outlet of the previous liquid cooling unit can be connected to the liquid inlet of the next liquid cooling unit, thus realizing the series flow channel connection of the liquid cooling units.

[0034] like Figure 1-9 As shown, rectangular slots 8 are provided on both the front and rear end faces of the upper housing 1 and the lower housing 2. The end cover 4 is integrally formed with a plate 9 that fits the slot 8 with a gap. The quick positioning and installation of the end cover 4 is achieved by the snap-fit ​​between the plate 9 and the slot 8.

[0035] like Figure 1-9 As shown, the heating assembly 5 includes mounting seats 501 evenly distributed along the top of the lower housing 2. A heating wire 502 is embedded inside the mounting seat 501. A mounting block 503 is bolted to the open side of the mounting seat 501 facing the serpentine channel 302. A protective housing 504 is integrally connected to the other end of the mounting block 503. A control and protection assembly for controlling the working state of the heating wire 502 and achieving overload protection is provided inside the protective housing 504. An end cap 4 has an opening on the side facing the mounting seat 501 that matches the protective housing 504. The mounting base 501 is equipped with a relief groove 505, and a heating wire 502 is installed inside the mounting base 501. The heating wire 502 is evenly distributed on the top of the lower housing 2. When the battery is in a low-temperature environment and needs to be heated, the heating wire 502 is powered by an external power supply. The heating wire 502 generates heat to heat the coolant inside the housing. The heated coolant circulates in the flow channel and transfers heat to the battery module to achieve rapid heating of the battery. The control and protection components are existing technologies and include switches, thermostats, fuses, and rheostats.

[0036] like Figure 1-9 As shown, the side wall of the mounting base 501 is provided with heat dissipation holes 10 that penetrate the inner and outer walls of the mounting base 501 at equal intervals along the height direction. The heat dissipation holes 10 are distributed in a circular array. The heat generated by the heating wire 502 can be quickly circulated to the interior of the upper housing 1 and the lower housing 2 through the heat dissipation holes 10 to heat the coolant.

[0037] like Figure 1-9 As shown, the two ends of the opposite end faces of the upper shell 1 and the lower shell 2 are coated with rare earth permanent magnet material that attracts magnetically. The magnetic adsorption assists in splicing and positioning, thereby improving the sealing performance of the shell splicing.

[0038] Working principle: During operation, rare earth permanent magnet material with magnetic attraction is applied to both ends of the opposite end faces of the upper shell 1 and the lower shell 2. During splicing, the initial alignment is achieved through magnetic adsorption, avoiding misalignment of the flow channel due to manual alignment deviation. After magnetic pre-positioning, the opposite end faces of the upper shell 1 and the lower shell 2 are tightly fitted together, forming a complete liquid cooling flow channel 3 (including connecting seat 301, serpentine channel 302, etc.). The continuous adsorption force of the rare earth permanent magnet material can reduce the gap of the splicing surface, improve the sealing of the flow channel, and prevent coolant leakage. Rectangular slots 8 are opened on both sides of the front and rear end faces of the upper shell 1 and the lower shell 2. The insertion plate 9 of the end cover 4 is fitted with the slot 8 with a gap, and the end cover 4 is quickly positioned and installed by snap-fit. The end cover 4 can not only seal the openings at both ends of the flow channel, but the avoidance groove 505 opened on it can also provide installation space for the protective shell 504 of the heating component 5, avoiding component interference, and further enhancing the overall sealing of the shell.

[0039] The coolant from the external cooling system enters the inlet pipe 303 through the connecting pipe 6 at the bottom of the lower housing 2. The inlet pipe 303 extends vertically to the beginning of the serpentine channel 302, and the flow channel cross-sectional area of ​​the initial section of the serpentine channel 302 is the smallest. According to the principles of fluid mechanics, under a fixed flow rate, a small cross-sectional area flow channel can enable the coolant to obtain a higher flow velocity, quickly flow through the high-temperature area of ​​the battery module, and efficiently absorb initial heat through strong convection effect, avoiding local overheating. The coolant flows along the serpentine channel 302... During flow, the flow channel is composed of multiple sets of arc-shaped curved sections. Along the flow direction, the inner diameter and cross-sectional area of ​​the next set of arc-shaped curved sections gradually increase. As the coolant absorbs heat, its temperature gradually rises. The increased cross-sectional area of ​​the flow channel can reduce the coolant flow rate: on the one hand, slowing down the flow rate can prolong the contact time between the coolant and the flow channel wall, ensuring that it fully absorbs the heat generated by the subsequent battery module and avoids insufficient heat absorption due to excessive flow rate; on the other hand, reducing the flow rate can reduce the rate of temperature rise of the coolant, avoiding overheating of the coolant at the end of the flow channel, thereby improving the heat dissipation uniformity in the entire liquid cooling unit. After the coolant has absorbed heat, it flows through the end of the serpentine channel 302 and enters the outlet pipe 304. Then, it is led out to the next liquid cooling unit through the connecting pipe 7 at the top of the upper housing 1, completing a single heat dissipation cycle.

[0040] When the battery needs to be heated in a low-temperature environment, the heating wire 502 is powered by an external power source. The heating wire 502 generates heat to heat the coolant inside the casing. The heated coolant circulates in the flow channel, transferring heat to the battery module to achieve rapid heating of the battery. The heat enters the cavity enclosed by the upper casing 1 and the lower casing 2 through the heat dissipation holes 10, and exchanges heat with the coolant in the serpentine channel 302, causing the coolant temperature to rise. The heated coolant circulates along the serpentine channel 302, directly contacting the battery module through the flow channel wall, and evenly transferring heat to each battery cell to achieve rapid preheating or low-temperature insulation of the battery, avoiding capacity decay or start-up failure due to low temperature.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A series liquid cooling plate for new energy batteries, comprising an upper shell (1) and a lower shell (2), wherein the upper shell (1) and the lower shell (2) are joined together, characterized in that: The upper shell (1) and the lower shell (2) form a liquid cooling channel (3) by enclosing their opposite end faces. End caps (4) are snapped onto the front and rear end faces of the upper shell (1) and the lower shell (2). Heating components (5) are equidistantly installed on the top of the lower shell (2) along its length. The heating components (5) include mounting seats (501) equidistantly distributed along the top of the lower shell (2). Heating wires (502) are embedded inside the mounting seats (501). Mounting blocks (503) are bolted to the open side of the mounting seats (501) facing the serpentine channel (302). The other end of the mounting block (503) is integrally connected to a protective housing (504). The protective housing (504) is provided with a control and protection component for controlling the working state of the heating wire (502) and realizing overload protection. The end cap (4) is provided with a relief groove (505) adapted to the protective housing (504) on the side facing the mounting base (501). The side wall of the mounting base (501) is provided with heat dissipation holes (10) that penetrate the inner and outer walls of the mounting base (501) at equal intervals along the height direction. The heat dissipation holes (10) are distributed in a circular array.

2. The new energy battery series liquid cooling plate according to claim 1, characterized in that: The liquid cooling channel (3) includes a connecting seat (301) equidistantly arranged on the opposite end faces of the upper shell (1) and the lower shell (2). A serpentine channel (302) is connected between adjacent connecting seats (301). The first end of the serpentine channel (302) is integrally connected to an inlet pipe (303) extending vertically, and the end of the serpentine channel (302) is integrally connected to an outlet pipe (304) extending vertically.

3. The new energy battery series liquid cooling plate according to claim 2, characterized in that: The serpentine channel (302) is composed of multiple arc-shaped curved sections spliced ​​together, and along the coolant flow direction, the inner diameter of the latter set of arc-shaped curved sections is larger than the inner diameter of the former set of arc-shaped curved sections, forming a gradually changing flow channel structure.

4. The new energy battery series liquid cooling plate according to claim 2, characterized in that: The bottom of the outer wall of the liquid inlet pipe (303) is integrally connected to a connecting pipe 1 (6) that penetrates the bottom of the lower shell (2), and the top of the outer wall of the liquid outlet pipe (304) is integrally connected to a connecting pipe 2 (7) that penetrates the top of the upper shell (1). The inner diameter of the connecting pipe 2 (7) is compatible with the outer diameter of the connecting pipe 1 (6), thus meeting the requirements for the series assembly of multiple liquid cooling plates.

5. A series liquid cooling plate for new energy batteries according to claim 1, characterized in that: The upper housing (1) and the lower housing (2) are provided with rectangular slots (8) on both the front and rear ends. The end cover (4) is integrally formed with a plug plate (9) that fits the slot (8) with a gap. The end cover (4) can be quickly positioned and installed by the plug plate (9) and the slot (8).

6. The new energy battery series liquid cooling plate according to claim 1, characterized in that: Both ends of the opposite end faces of the upper shell (1) and the lower shell (2) are coated with rare earth permanent magnet material that attracts magnetic attraction. The magnetic adsorption assists in splicing and positioning, thereby improving the sealing performance of the shell splicing.

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