Immersed liquid-cooled battery
By eliminating the fan in the immersion liquid-cooled battery and using the flow of coolant to remove heat, combined with vertical channels and a return cavity, the problem of fan space occupation is solved, achieving a design of efficient cooling and high-capacity battery pack, and reducing costs.
Patent Information
- Application Number
- CN202422328722.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In existing immersion liquid-cooled battery solutions, the fan occupies the internal space of the battery pack, resulting in a smaller battery capacity and poor cooling effect.
The design employs a non-stirring fan, which uses vertical channels and liquid cooling plates between the battery cell modules to remove heat by the flow of coolant. Combined with an annular reflux cavity and overflow holes, the coolant is circulated to ensure full contact between the battery cell and the coolant.
This effectively avoids the space occupied by the fan, improves the capacity and cooling efficiency of the battery pack, ensures a small temperature difference between the cells, meets the requirements of high-capacity and high-rate applications, and reduces processing costs.
Smart Images
Figure CN223612471U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to liquid cooling battery technical field, concretely relates to a kind of immersion liquid cooling battery. BACKGROUND
[0002] With the development of new energy industry, the user mainly in the automotive industry puts forward higher requirements for the innovation and iteration of power battery. As a kind of power battery, the immersion liquid cooling battery directly immerses the battery module in the cooling liquid in the box, realizes direct, rapid and sufficient cooling of the battery module, ensures the operation of the battery in the best temperature range, effectively prolongs the service life of the battery, and thus improves the safety performance of the battery as a whole. In the prior art, such as patent CN210692720U, a kind of immersion liquid cooling battery pack is disclosed, which comprises a box cover, a battery box and the box cover form a sealed space, the battery is fixed in the lower box, the cooling liquid is injected into the lower box, the battery is soaked and the immersion liquid leakage groove is also installed, and a power fan, a stirring fan and a cooling fan are also installed, wherein the stirring fan is fixed on the bottom of the lower box and is soaked by the cooling liquid, so as to realize good liquid cooling and heat dissipation function. However, the scheme of adding fan inside the immersion type for stirring occupies the internal space of the battery pack, and the battery capacity is small under the condition of the same type of battery and the same battery pack volume. SUMMARY
[0003] The utility model aims at overcoming the above-mentioned defects or problems existing in the background art, and provides an immersion liquid cooling battery.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] An immersion liquid cooling battery comprises a battery plug-in box and a plurality of battery modules arranged in the battery plug-in box. Vertical channels are arranged between adjacent single batteries in the battery module. A liquid cooling plate is arranged at the bottom of the battery plug-in box. The liquid cooling plate is provided with a liquid inlet, a plurality of first liquid outlets and second liquid outlets. The first liquid outlets and the second liquid outlets are connected with flow channels in the liquid cooling plate. The first liquid outlets are uniformly arranged on the liquid cooling plate between adjacent battery modules. The second liquid outlets are arranged directly below the single batteries. A back-type bottom pad is arranged between the battery module and the liquid cooling plate. A backflow cavity is arranged on the inner wall of the battery plug-in box. A plurality of overflow holes are arranged in the backflow cavity. The backflow cavity is connected with a backflow outlet.
[0006] In some embodiments of the utility model, the backflow cavity is an annular channel arranged on the upper part of the inner wall of the battery plug-in box. The annular channel is arranged as an elbow pipe part corresponding to the bending part of the battery plug-in box.
[0007] In some embodiments of the utility model, the front surface of the annular channel is an arc surface. The plurality of overflow holes are uniformly arranged on the arc surface at the same horizontal height. The arrangement height of the overflow holes is higher than the top height of the battery module.
[0008] In some embodiments of the utility model, the top plate inside of battery plug -in box is arranged with flow guide plate.
[0009] In some embodiments of the utility model, the top spacing is left between the top of battery cell module and the top plate of battery plug -in box, and the single battery cells in the battery cell module are arranged in a straight line.
[0010] In some embodiments of the utility model, the back type bottom pad adopts silica gel pad, the thickness of silica gel pad is 2-3mm, and the compression amount is 20-30%.
[0011] In some embodiments of the utility model, the flow channel includes branch channel, first channel and second channel arranged horizontally, first channel and second channel are all communicated with branch channel, the other side of branch channel is communicated with liquid inlet, first liquid outlet hole is arranged in corresponding first channel, and second liquid outlet hole is arranged in corresponding second channel.
[0012] In some embodiments of the utility model, the width of first channel is less than the width of second channel, and the width of second channel is less than the width of branch channel.
[0013] From the above description of the utility model, compared with the prior art, the utility model has the following beneficial effects:
[0014] 1, the second liquid outlet hole is arranged at the bottom of single battery cell, the bottom of battery cell module and the back type silica gel pad form a relatively closed space, the cooling liquid flows out from the vertical channel reserved between single battery cells after entering, prevents the cooling liquid from flowing out from the gap and dispersing the upward pressure of liquid, simultaneously, makes the bottom of single battery cell fully contact with the cooling liquid, is favorable to quickly take away the heat of the bottom of battery cell and the side of vertical channel.
[0015] 2, adopt the immersion type liquid cooling scheme, and do not set up agitating fan, avoid occupying the internal space of battery pack, cooling liquid flows and single battery cell fully contact and timely take away heat, through the spacing channel between the vertical channel and adjacent battery cell module, cooperate different liquid outlet holes and overflow holes, promote the upward circulation of cooling liquid, each surface of single battery cell contacts with cooling liquid and cooling liquid is in flowing state, effectively guarantee the liquid cooling effect, avoid the temperature difference between different battery cells in battery plug -in box too large, satisfy the heat dissipation requirement of battery in high capacity and high rate application scene.
[0016] 3, in actual application, the width of first channel, the width of second channel, the size of first liquid outlet hole and the thickness of silica gel pad can be adjusted to adjust the flow rate of cooling liquid, and the uniformity of cooling liquid flow rate is convenient to guarantee
[0017] 4, battery processing and assembly are convenient, and the required mold is less, which greatly reduces the initial investment cost of battery pack. DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 It is a schematic view of the battery plug-in box of the present application.
[0020] Figure 2 It is a structural schematic view of the present application.
[0021] Figure 3 It is a schematic view of the first liquid outlet hole and the second liquid outlet hole of the present application.
[0022] Figure 4 It is a schematic view of the flow channel of the present application.
[0023] Figure 5 It is a schematic view of the arrangement of the battery cell module of the present application.
[0024] Figure 6 It is an A enlarged view of the present application. Figure 5
[0025] Main figure mark explanation:
[0026] 1, battery plug-in box, 2, battery cell module, 20, single battery cell, 21, vertical channel, 3, liquid cooling plate, 30, flow channel, 31, liquid inlet, 32, first liquid outlet hole, 33, second liquid outlet hole, 34, spacing space, 35, sub-channel, 36, first channel, 37, second channel, 4, back type bottom pad, 5, backflow cavity, 50, overflow hole, 51, annular channel, 52, elbow, 53, arc surface. DETAILED DESCRIPTION
[0027] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as excluding other embodiments. Based on the embodiments of 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.
[0028] In the claims, specification and above drawings of the present application, unless otherwise explicitly limited, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.
[0029] In the claims, the specification, and the drawings of the present application, terms such as "top", "bottom", "front", "back", "leading", "trailing", etc., if used, are used for convenience and are not intended to necessitate that the apparatus, the article, or the device referred to is constructed or operated in that particular orientation. Terms such as "attached", "connected", "engaged", "coupled", "fixed", etc., if used, are to be construed as broad terms that do not necessarily imply any direct connection or the like, unless otherwise explicitly stated.
[0030] In the claims, the specification, and the drawings of the present application, unless otherwise expressly specified, terms such as "fixedly connected" or "fixedly connected" are to be construed as broad terms that do not necessarily imply any direct connection or the like, unless otherwise explicitly stated.
[0031] In the claims, the specification, and the drawings of the present application, terms such as "including", "having", and their variants, are intended to mean "including but not limited to".
[0032] Example 1, see Figures 1-6 :
[0033] An immersion liquid-cooled battery includes a battery plug-in box 1 and a plurality of battery cell modules 2 arranged in the battery plug-in box 1. A top portion of the battery cell module 2 and a top plate of the battery plug-in box 1 are spaced apart by a top portion spacing. Adjacent single battery cells 20 in the battery cell module 2 are spaced apart by a vertical channel 21. The plurality of single battery cells 20 in the battery cell module 2 are arranged in a linear arrangement. The battery cell module 2 is immersed in a cooling liquid. A bottom plate of the battery plug-in box 1 is arranged as a liquid-cooled plate 3. The liquid-cooled plate 3 is provided with a flow channel 30 for conveying the cooling liquid.
[0034] The liquid-cooled plate 3 is provided with a liquid inlet 31, a plurality of first liquid outlet holes 32 and second liquid outlet holes 33. The first liquid outlet holes 32 and the second liquid outlet holes 33 are both in communication with the flow channel 30 in the liquid-cooled plate 3. The first liquid outlet holes 32 are uniformly distributed on the top portion of the liquid-cooled plate 3 between adjacent battery cell modules 2. After the cooling liquid flows out of the first liquid outlet holes 32, it flows along the spacing space 34 between adjacent battery cell modules 2.
[0035] The second liquid outlet holes 33 are arranged directly below the single battery cells 20. A return type bottom pad 4 is arranged between the bottom edge of the battery cell module 2 and the liquid-cooled plate 3. After the cooling liquid flows out of the second liquid outlet holes 33, it enters the inside space of the return type bottom pad 4, and then flows along the vertical channel 21.
[0036] The inner side wall of the battery plug-in box 1 is provided with a backflow cavity 5, and the backflow cavity 5 is provided with a plurality of overflow holes 50. The backflow cavity 5 is communicated with a backflow outlet. After the cooling liquid in the battery plug-in box 1 flows upward, it flows out from the backflow outlet after passing through the overflow holes 50 on the backflow cavity 5.
[0037] It can be understood that the liquid inlet 31 is arranged on the outer side of the liquid cooling plate 3, and the battery cell module 2 is fixedly attached in the battery plug-in box 1. In addition to the backflow outlet and the liquid inlet 31, the inside of the battery plug-in box 1 is formed as a sealed space. The cooling liquid flows into the battery plug-in box 1 from the liquid inlet 31 and fills the inside of the battery plug-in box 1, and then flows out from the backflow outlet.
[0038] As an embodiment, the back-shaped bottom pad 4 is a silica gel pad with a thickness of 2-3 mm and a width of 4 mm. The compression amount of the silica gel pad is 20-30%. Preferably, the compression amount of the silica gel pad is 25%. The interference fit of the battery cell module 2 generates pressure to compress the silica gel pad, so as to prevent the cooling liquid from flowing out from the gap between the battery cell module 2 and the silica gel pad.
[0039] As an embodiment, the battery cell modules 2 are arranged side by side. The number of the first liquid outlets 32 on one side of the battery cell module 2 is the same as the number of the single battery cells 20 in the battery cell module 2. The single battery cells 20 of adjacent battery cell modules 2 correspond one by one, and the first liquid outlets 32 are arranged between the corresponding single battery cells 20.
[0040] As an embodiment, the flow channel 30 includes a vertical arranged sub-channel 35, a plurality of first channels 36 and second channels 37 arranged transversely. The first channels 36 and the second channels 37 are both communicated with the sub-channel 35. The sub-channel 35 is communicated with the liquid inlet 31 on the other side. The first liquid outlets 32 are arranged in the corresponding first channels 36, and the second liquid outlets 33 are arranged in the corresponding second channels 37. The cooling liquid enters the sub-channel 35 from the liquid inlet 31, and then is distributed to each first channel 36 and second channel 37.
[0041] As an embodiment, the width of the first channel 36 is smaller than the width of the second channel 37, and the width of the second channel 37 is smaller than the width of the sub-channel 35, so that the amount of cooling liquid in the second channel 37 is greater than that in the first channel 36.
[0042] As an embodiment, the width of the second channel 37 is 1.1-1.3 times the width of the first channel 36. Preferably, the width of the first channel 36 is 18 mm, the width of the second channel 37 is 22 mm, and the width of the sub-channel 35 is 28 mm.
[0043] It can be understood that, according to actual needs, the sizes of different first liquid outlets 32 can be the same or different, for example, the sizes of the first liquid outlets 32 close to the liquid inlet 31 are greater than the sizes of the first liquid outlets 32 located at the rear side, specifically, the number of the first liquid outlets 32 close to the liquid inlet 31 is 7, and the size is a diameter of 11 mm, and the number of the first liquid outlets 32 located at the rear side is 7, and the size is a diameter of 9.5 mm, that is, the number of the first liquid outlets 32 on one side of the battery cell module 2 is 14, and the number of the single battery cells 20 in the battery cell module 2 is 14.
[0044] As an embodiment, the reflux cavity 5 is an annular channel 51 arranged on the upper part of the inner side wall of the battery plug-in box 1, the annular channel 51 is arranged as an elbow pipe part 52 corresponding to the bending part of the battery plug-in box 1, which reduces the flow resistance of the right angle and reduces the impact of the turbulent flow; preferably, the elbow pipe part 52 adopts a welded elbow pipe, and due to the reduction of the impact of the turbulent flow, the cracking of the welding seam caused by the impact of the turbulent flow is effectively avoided.
[0045] As an embodiment, the front surface of the annular channel 51 is an arc surface 53, and a plurality of overflow holes 50 are uniformly distributed on the arc surface 53 at the same height, and the arrangement height of the overflow holes 50 is higher than the top height of the battery cell module 2, which is convenient for the flow of the cooling liquid.
[0046] It can be understood that, according to actual needs, the sizes of different overflow holes 50 can be the same or different, for example, the sizes of the overflow holes 50 close to the liquid inlet 31 are smaller than the sizes of the overflow holes 50 located at the rear side, specifically, the sizes of the overflow holes 50 close to the liquid inlet 31 are 7 mm, and the sizes of the overflow holes 50 located at the rear side are 9 mm.
[0047] Example 2:
[0048] Repeat Example 1, but the inner side of the top plate of the battery plug-in box 1 is arranged with a flow guide plate, which is used to guide the cooling liquid towards the corresponding overflow hole 50 on the outer side, which helps to stabilize the flow direction of the cooling liquid and guarantees the liquid cooling effect. Specifically, the cooling liquid in the battery plug-in box 1 flows upwards to the space at the upper part of the battery plug-in box 1, and under the action of the flow guide plate, it is guided to flow to the overflow hole 50 on the outer side.
[0049] Example 3:
[0050] Repeat Example 1, the reflux cavity 5 is not arranged as an annular channel, the inside of the battery plug-in box 1 is a rectangular space, the reflux cavity 5 is only arranged on the inner side walls of three sides of the battery plug-in box 1, the liquid inlet 31 is not arranged with the reflux cavity 5, and the liquid inlet 31 and the reflux outlet are arranged on different sides of the battery plug-in box 1.
[0051] The description of the above specification and the embodiments are used to explain the protection scope of the present application, but do not constitute the limitation of the protection scope of the present application. Through the inspiration of the present application or the above embodiments, the ordinary skilled in the art combines the common knowledge, the ordinary technical knowledge in the art and / or the prior art, and obtains the modification, equivalent replacement or other improvement of the present application embodiment or one part of the technical features through logical analysis, reasoning or limited test, which should be included in the protection scope of the present application.
Claims
1. An immersion liquid-cooled battery, characterized by: The application relates to a battery plug-in box (1) and a plurality of battery cell modules (2) arranged in the battery plug-in box (1), vertical channels (21) being arranged between adjacent single battery cells (20) in the battery cell modules (2), a liquid cooling plate (3) being arranged at the bottom of the battery plug-in box (1), the liquid cooling plate (3) being provided with a liquid inlet (31), a plurality of first liquid outlets (32) and second liquid outlets (33), the first liquid outlets (32) and the second liquid outlets (33) being communicated with flow channels (30) in the liquid cooling plate (3), the first liquid outlets (32) being uniformly arranged on the liquid cooling plate (3) between adjacent battery cell modules (2), the second liquid outlets (33) being arranged directly below the single battery cells (20), a back-type bottom pad (4) being arranged between the battery cell modules (2) and the liquid cooling plate (3), a backflow cavity (5) being arranged on the inner side wall of the battery plug-in box (1), a plurality of overflow holes (50) being arranged on the backflow cavity (5), and the backflow cavity (5) being communicated with a backflow outlet.
2. The submerged liquid-cooled battery of claim 1, wherein: The backflow cavity (5) is an annular channel (51) arranged on the upper portion of the inner side wall of the battery plug-in box (1), and the annular channel (51) is arranged as an elbow pipe portion (52) corresponding to the bending portion of the battery plug-in box (1).
3. The submerged liquid-cooled battery of claim 2, wherein: The front surface of the annular channel (51) is an arc surface (53), and the plurality of overflow holes (50) are uniformly arranged on the arc surface (53) at the same height, and the arrangement height of the overflow holes (50) is higher than the top height of the battery cell modules (2).
4. The submerged liquid-cooled battery of claim 1, wherein: The inner side of the top plate of the battery plug-in box (1) is provided with a flow guide plate.
5. The submerged liquid-cooled battery of claim 1, wherein: The top portion of the battery cell modules (2) and the top plate of the battery plug-in box (1) are provided with a top spacing, and the plurality of single battery cells (20) in the battery cell modules (2) are arranged in a linear manner.
6. The submerged liquid-cooled battery of claim 1, wherein: The back-type bottom pad (4) is made of a silica gel pad, the thickness of the silica gel pad is 2-3 mm, and the compression amount is 20-30%.
7. The submersible liquid-cooled battery of any one of claims 1-6, wherein: The flow channel (30) comprises a branch channel (35), a plurality of first channels (36) and second channels (37) arranged in the transverse direction, the first channels (36) and the second channels (37) are communicated with the branch channel (35), the branch channel (35) is communicated with the liquid inlet (31) on the other side, the first liquid outlets (32) are arranged in the corresponding first channels (36), and the second liquid outlets (33) are arranged in the corresponding second channels (37).
8. The submerged liquid-cooled battery of claim 7, wherein: The width of the first channel (36) is smaller than the width of the second channel (37), and the width of the second channel (37) is smaller than the width of the branch channel (35).
9. The submerged liquid-cooled battery of claim 8, wherein: The width of the second channel (37) is 1.1-1.3 times the width of the first channel (36).