Liquid-cooled power battery pack

Abstract

The utility model discloses a liquid cooling power battery pack which comprises a bottom shell, a fixing plate is installed in the bottom shell, a battery pack is installed on the upper portion of the fixing plate in a clamped mode, a cooling plate is installed at the bottom of the fixing plate in an embedded mode, a liquid storage plate is installed in the bottom shell, and a conveying pipe is installed on one side of the liquid storage plate. The output end of the conveying pipe is connected to one side of the cooling plate, a micro water pump is installed in the middle of the conveying pipe, a circulating pipe is installed at the bottom of the cooling plate, the output end of the circulating pipe is connected to the top of the liquid storage plate, and the micro water pump is started to pump cooling liquid in the liquid storage plate to the cooling plate through the conveying pipe. The cooling liquid absorbs heat generated by the battery pack when flowing through the cooling plate, the heat generated by the battery pack is continuously taken away through the process that the cooling liquid is driven by the micro water pump to circulate, the overheating phenomenon of the battery pack during fast charging or high-power output is effectively prevented, and therefore safe and stable operation of the battery pack is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely is a kind of liquid cooling power battery pack. BACKGROUND

[0002] Power battery pack is the core component of electric vehicle such as electric vehicle, electric motorcycle and some energy storage systems, mainly by battery module, battery management system (BMS), electrical system, thermal management system and mechanical structural member etc. The performance of power battery pack directly influences the key indicators such as the cruising range, power performance and safety of electric vehicle. Therefore, the development of high-performance, high-safety and long-life power battery pack is one of the key technologies in the field of electric vehicles.

[0003] Liquid cooling system can more accurately control the temperature of battery pack. Through the circulating cooling liquid, the heat generated by the battery can be uniformly taken away, avoiding local overheating, so that the temperature of each part in the battery pack is kept in a relatively consistent range, which helps to improve the overall performance and life of the battery pack. The specific heat capacity of liquid is large, and it can absorb more heat, so the heat dissipation efficiency is high. Compared with air cooling and other heat dissipation methods, liquid cooling system can reduce the temperature of battery pack to a reasonable range in a shorter time, especially in the case of high-rate charging of battery, etc. More heat is generated, which can effectively prevent battery overheating and ensure stable battery performance. When fast charging, the liquid cooling system can make the battery temperature rise significantly less than the battery pack without liquid cooling.

[0004] According to the authorized announcement number CN 221805710 U, a kind of power battery pack is disclosed, it includes shell and electric core component;Shell includes midframe structure and reinforcing bar, reinforcing bar is located in the inside of midframe structure and is connected to midframe structure respectively;Electric core component includes multiple groups of electric core module and heat insulating piece, electric core module is arranged with interval, heat insulating piece is internally provided with heat dissipation air duct;Wherein part of heat insulating piece is located between two adjacent electric core modules, at least part of heat insulating piece is located between midframe structure and electric core module, and the heat dissipation air duct of multiple groups of heat insulating pieces is mutually parallelly arranged.

[0005] Most of the existing power battery pack is cooled by air cooling, and in the fast charging and high-performance application scene, the efficiency of heat dissipation is low, which may affect the normal use of battery pack, so now a kind of liquid cooling power battery pack is needed. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a kind of liquid cooling power battery pack, cooling liquid is circulated between the liquid storage plate and cooling plate set, and the battery pack is cooled by liquid, to solve the technical problem mentioned in the background art.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] The utility model provides a liquid cooling power battery pack, including bottom shell, the inside fixed plate of bottom shell is installed, the upper portion of fixed plate is connected and installed battery group,

[0009] The bottom of the fixed plate is embedded with a cooling plate, and the inside of the bottom shell is installed with a liquid storage plate below the cooling plate. One side of the liquid storage plate is installed with a delivery pipe, the output end of which is connected to one side of the cooling plate. The middle part of the delivery pipe is installed with a micro water pump, and the bottom of the cooling plate is installed with a circulation pipe, the output end of which is connected to the top of the liquid storage plate.

[0010] Preferably, a plurality of clamping grooves are formed in the middle part of the fixed plate corresponding to the battery group, and the battery group is clamped in the inside of the corresponding clamping groove.

[0011] Preferably, a plurality of strip-shaped holes are formed in the bottom of each clamping groove, and a heat-conducting strip is installed in the inside of each strip-shaped hole. The bottom of the plurality of heat-conducting strips is attached to the upper surface of the cooling plate.

[0012] Preferably, a receiving plate is installed in the bottom of the fixed plate inside the bottom shell, and the top of the receiving plate is attached to the bottom of the cooling plate.

[0013] Preferably, a plurality of heat dissipation holes are formed in the bottom shell corresponding to the liquid storage plate, and the heat dissipation holes are arranged in an array.

[0014] Preferably, a plurality of through holes are symmetrically formed in the other two sides of the bottom shell, and a fan is installed in the inside of each through hole.

[0015] Preferably, a top shell is installed on the upper part of the bottom shell, and the bottom shell and the top shell are connected through a plurality of fixed bolts.

[0016] Preferably, an elastic compression pad is arranged in the inside of the top shell corresponding to the battery group, and the lower surface of the elastic compression pad is tightly attached to the upper surface of the battery group.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] When the power battery pack is working, the micro water pump is started to pump the cooling liquid in the liquid storage plate to the cooling plate through the delivery pipe. The cooling liquid absorbs the heat generated by the battery group when flowing through the cooling plate, and after heat exchange, the heated cooling liquid is returned to the liquid storage plate through the circulation pipe. Through the circulation process of the cooling liquid driven by the micro water pump, the heat generated by the battery group is continuously removed, effectively preventing the battery pack from overheating when fast charging or high-power output, thereby ensuring the safe and stable operation of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model.

[0020] Figure 2 It is the split schematic view of the internal structure of the base of the utility model;

[0021] Figure 3 It is the split schematic view of the upper structure of the fixed plate of the utility model;

[0022] Figure 4 It is the schematic view of the upper structure of the liquid storage plate of the utility model;

[0023] Figure 5 It is the split schematic view of the overall structure of the utility model.

[0024] In the figure: 1, bottom shell; 2, fixed plate; 3, clamping groove; 4, battery pack; 5, heat-conducting strip; 6, cooling plate; 7, liquid storage plate; 8, conveying pipe; 9, micro water pump; 10, circulating pipe; 11, receiving plate; 12, heat dissipation hole; 13, fan; 14, top shell; 15, fixed bolt; 16, elastic compression pad. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] The utility model provides: a kind of liquid cooling power battery pack, as shown in figure Figures 1-5 The inside of bottom shell 1 is equipped with fixed plate 2, the upper portion of fixed plate 2 is clamped and is equipped with battery pack 4, battery pack 4 is installed on fixed plate 2 by clamping, so that the installation and disassembly process of battery pack 4 is more convenient and fast;

[0027] The bottom of the fixed plate 2 is embedded with a cooling plate 6, the inside of the bottom shell 1 is located at the lower part of the cooling plate 6 and is provided with a liquid storage plate 7, one side of the liquid storage plate 7 is provided with a conveying pipe 8, the output end of the conveying pipe 8 is connected to one side of the cooling plate 6, the middle part of the conveying pipe 8 is provided with a micro water pump 9, the bottom of the cooling plate 6 is provided with a circulating pipe 10, the output end of the circulating pipe 10 is connected to the top of the liquid storage plate 7, and the heat generated by the battery pack 4 can be quickly conducted to the cooling plate 6 through the fixed plate 2. The closely fitted installation mode shortens the heat transfer path, reduces the thermal resistance, so that the cooling plate 6 can more efficiently absorb heat, and the liquid storage plate 7 is located below the cooling plate 6 and connected through the conveying pipe 8 and the circulating pipe 10. The liquid storage plate 7 continuously provides a cooling liquid source for the cooling cycle. When the cooling plate 6 absorbs heat, the temperature of the cooling liquid rises and flows back to the liquid storage plate 7 through the circulating pipe 10, completing heat exchange and cooling liquid cooling, and the micro water pump 9 provides power for the entire cooling liquid circulation.

[0028] The micro water pump 9 is a circulating pump for direct current power supply, the flow range is 1-3L / min, the lift is not less than 2.5 meters, and the circulating demand of the cooling liquid in the conveying pipe 8 and the circulating pipe 10 can be met.

[0029] Preferably, a plurality of clamping grooves 3 are formed in the middle part of the fixed plate 2 corresponding to the battery pack 4, the battery pack 4 is clamped in the inside of the corresponding clamping groove 3, and the plurality of clamping grooves 3 formed in the middle part of the fixed plate 2 enable the battery pack 4 to be quickly installed on the upper part of the fixed plate 2, and when the battery pack 4 needs to be repaired or replaced, it can also be conveniently taken out from the clamping groove 3, thereby significantly improving the maintenance efficiency.

[0030] As preferred, a plurality of strip-shaped holes are formed in the bottom of each clamping groove 3, and a heat-conducting strip 5 is installed in the inside of each strip-shaped hole, and the bottoms of the plurality of heat-conducting strips 5 are attached to the upper surface of the cooling plate 6. The heat-conducting strips 5 installed in the strip-shaped holes enhance the heat conduction efficiency from the battery pack 4 to the cooling plate 6. The heat generated by the battery pack 4 during operation can be quickly transferred to the cooling plate 6 through these heat-conducting strips 5, and the circulating liquid cooling is combined to ensure that the battery pack 4 is always in an appropriate working temperature range, preventing problems such as battery capacity attenuation and service life shortening caused by overheating, and improving battery performance and service life.

[0031] Further, a receiving plate 11 is installed at the lower part of the fixed plate 2 in the inside of the bottom shell 1, the top of the receiving plate 11 is attached to the bottom of the cooling plate 6, the receiving plate 11 is installed at the lower part of the fixed plate 2 in the inside of the bottom shell 1, the top is tightly attached to the bottom of the cooling plate 6, and the receiving plate 11 provides a solid support for the cooling plate 6, ensuring that the cooling plate 6 is always in a stable working position and in good contact with the heat-conducting strips 5, thereby guaranteeing the stability of the liquid cooling heat dissipation.

[0032] Further, a plurality of groups of heat dissipation holes 12 are formed on two sides of the bottom shell 1 corresponding to the liquid storage plate 7, the heat dissipation holes 12 are arrayed, the heat dissipation area is increased, and the temperature of the cooling liquid in the liquid storage plate 7 is increased after absorbing the heat transferred from the cooling plate 6, and the heat can be quickly dissipated to the external environment through the heat dissipation holes 12.

[0033] Remarkably, a plurality of groups of through holes are symmetrically formed on the other two sides of the bottom shell 1, and a fan 13 is installed in each group of through holes, the fan 13 can actively suck low-temperature air from the outside into the bottom shell 1, and directly act on the heating components, the fan 13 cooperates with the heat dissipation holes 12 formed on the two sides of the bottom shell 1, the fan 13 accelerates the air flow, so that the cold air entering through the heat dissipation holes 12 can be mixed with the hot air inside more quickly and discharged, the heat dissipation effect of the heat dissipation holes 12 is enhanced, and the heat dissipation efficiency of the whole power battery pack is improved.

[0034] Specifically, a top shell 14 is installed on the upper part of the bottom shell 1, the bottom shell 1 and the top shell 14 are connected through a plurality of groups of fixing bolts 15, and the top shell 14 and the bottom shell 1 are connected to form a protective shell, so as to protect the components inside, effectively block the dust, sundries and accidental collision from the outside, reduce the risk of component damage caused by external factors, and prolong the overall service life of the power battery pack.

[0035] More specifically, a plurality of elastic compression pads 16 are arranged in the top shell 14 corresponding to the battery pack 4, the lower surface of the elastic compression pad 16 is tightly attached to the upper surface of the battery pack 4, the elastic compression pad 16 can continuously provide downward elastic pressure for the battery pack 4, effectively prevent the battery pack 4 from shaking and shifting in the clamping groove 3 of the fixing plate 2, ensure that the battery pack 4 always remains in the precise installation position, and guarantee the stable operation and performance of the whole power battery pack.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled power battery pack, comprising a bottom shell (1), characterized in that: The inside of the bottom shell (1) is provided with a fixing plate (2), the upper part of the fixing plate (2) is provided with a battery pack (4) through clamping connection; The bottom of the fixing plate (2) is embeddedly provided with a cooling plate (6), the inside of the bottom shell (1) is provided with a liquid storage plate (7) below the cooling plate (6), one side of the liquid storage plate (7) is provided with a conveying pipe (8), the output end of the conveying pipe (8) is connected to one side of the cooling plate (6), the middle part of the conveying pipe (8) is provided with a micro water pump (9), the bottom of the cooling plate (6) is provided with a circulating pipe (10), the output end of the circulating pipe (10) is connected to the top of the liquid storage plate (7).

2. The liquid-cooled power battery pack of claim 1, wherein: The middle part of the fixing plate (2) is provided with a plurality of clamping grooves (3) corresponding to the battery pack (4), the battery pack (4) is clamped in the inside of the corresponding clamping groove (3).

3. The liquid-cooled power battery pack of claim 2, wherein: The bottom of each group of clamping grooves (3) is provided with a plurality of strip-shaped holes, the inside of each group of strip-shaped holes is provided with a heat-conducting strip (5), the bottom of each group of heat-conducting strips (5) is attached to the upper surface of the cooling plate (6).

4. The liquid-cooled power battery pack of claim 3, wherein: The bottom of the bottom shell (1) is provided with a receiving plate (11) below the fixing plate (2), the top of the receiving plate (11) is attached to the bottom of the cooling plate (6).

5. The liquid-cooled power battery pack of claim 4, wherein: The two sides of the bottom shell (1) are provided with a plurality of heat dissipation holes (12) corresponding to the liquid storage plate (7), the heat dissipation holes (12) are arranged in an array.

6. The liquid-cooled power battery pack of claim 5, wherein: The other two sides of the bottom shell (1) are symmetrically provided with a plurality of through holes, the inside of each group of through holes is provided with a fan (13).

7. The liquid-cooled power battery pack of claim 6, wherein: The upper part of the bottom shell (1) is provided with a top shell (14), the bottom shell (1) and the top shell (14) are connected through a plurality of fixing bolts (15).

8. The liquid-cooled power battery pack of claim 7, wherein: The inside of the top shell (14) is provided with an elastic compression pad (16) corresponding to the battery pack (4), the lower surface of the elastic compression pad (16) is tightly attached to the upper surface of the battery pack (4).

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