Battery thermal management system

Abstract

The utility model relates to a battery thermal management system, which belongs to the technical field of electric heavy trucks and comprises a case, a first water pump, a condenser, an expansion valve, an evaporator and a compressor are arranged in the case, an output port of the first water pump is connected with a water source and an input port of the evaporator, and the compressor is connected with the condenser. The compressor, the condenser and the expansion valve are sequentially connected through pipelines, a fan is fixedly arranged on the front side of the machine box and used for driving air in the machine box to be exhausted forwards, air holes are formed in the left side, the right side and the rear side of the machine box, and an auxiliary mechanism is arranged on the machine box. Air exhausted by the flow equalizing holes acts on the condenser, uniformity of the air acting on the condenser is improved, heat dissipation and condensation effects of the condenser are improved, heat of the air in the flow equalizing pipes is absorbed through the heat absorption pipes, temperature of the air acting on the condenser from the flow equalizing holes is reduced, and heat dissipation efficiency of the condenser is improved. And the heat dissipation and condensation effects of the condenser are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery thermal management system belongs to electric heavy truck technical field. BACKGROUND

[0002] With the global attention to environmental protection and energy transformation, the new energy automobile industry has developed rapidly. As an important part of the transportation field, heavy trucks also have an increasingly obvious trend of electrification. New energy vehicles, especially electric vehicles, with their zero emissions, low noise, high energy efficiency and other advantages, have become an important direction for future transportation development.

[0003] In electric vehicles, the battery is a core component, and its performance directly affects the performance of the vehicle. However, the battery will generate a lot of heat during operation, and if the heat cannot be dissipated in time, it will cause the battery temperature to rise, thereby affecting the performance, life and safety of the battery. Therefore, battery thermal management technology is crucial for electric vehicles and heavy truck electric vehicles.

[0004] The Chinese utility model patent with publication number CN209993703U discloses a pure electric heavy truck battery thermal management device, which comprises a cooling liquid circulating cooling assembly and a refrigerant circulating cooling assembly arranged in a rack; the cooling liquid circulating cooling assembly and the refrigerant circulating cooling assembly are connected through a plate heat exchanger; the cooling liquid circulating cooling assembly comprises an electronic water pump, and the outlet of the electronic water pump is connected to the plate heat exchanger and a water outlet pipe assembly through a pipeline in sequence; the inlet of the electronic water pump is connected to a water inlet pipe assembly; the refrigerant circulating cooling assembly comprises a condenser, and the inlet of the condenser is connected to an electric compressor, an outlet of the plate heat exchanger through a pipeline in sequence; the outlet of the condenser is connected to a drying bottle, an expansion valve and an inlet of the plate heat exchanger through a pipeline in sequence; and a condensing fan is arranged in front of the condenser. The device has a compact structure, is convenient to install in different combinations, adapts to different environments, enables the battery pack to dissipate heat quickly, improves the temperature control effect, and enables the battery pack to always operate within a normal temperature range. However, in the prior art, the condenser is cooled by the strong convection effect generated when the fan is started, and the flow direction of the air in the rack is fixed, so that the air is not evenly distributed when acting on the condenser, affecting the cooling effect of the condenser.

[0005] Therefore, there is a need for a battery thermal management system to improve the cooling effect of the condenser. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a battery thermal management system that improves the cooling effect of the condenser.

[0007] The utility model discloses a technical scheme that solves the above problems is adopted: a battery thermal management system, including the case, be provided with first water pump, condenser, expansion valve, evaporimeter and compressor in the case, the output of first water pump is connected with water source, the output of first water pump is connected with the input of evaporimeter, the compressor, condenser and expansion valve are connected in proper order through the pipeline, the front side fixed setting of case has the fan, the fan is used for driving the air in the case to discharge forward, the left side, right side and rear side of case all are provided with air hole, be provided with auxiliary mechanism on the case,

[0008] The auxiliary mechanism includes a flow equalizing pipe, the flow equalizing pipe vertically passes through the top and bottom of the case, the flow equalizing pipe is fixedly connected with the case, the flow equalizing pipe is located at the rear side of the condenser, the flow equalizing pipe is provided with a flow equalizing hole, and the flow equalizing hole is communicated with the cavity in the case.

[0009] Preferably, the flow equalizing hole is located at the front side of the flow equalizing pipe.

[0010] Preferably, the flow equalizing hole on the flow equalizing pipe is provided with a plurality of flow equalizing holes, and the plurality of flow equalizing holes are distributed from top to bottom.

[0011] Preferably, the auxiliary mechanism further includes a water tank, the water tank is fixedly arranged on the case, the water tank is provided with cooling water, one side of the water tank is provided with a heat absorption pipe, both ends of the heat absorption pipe are communicated with the inside of the water tank, the heat absorption pipe passes through the flow equalizing pipe, a gap is arranged between the heat absorption pipe and the inner wall of the flow equalizing pipe, and the water tank is provided with a driving assembly.

[0012] Preferably, the flow equalizing pipe is provided with a plurality of flow equalizing pipes, and the plurality of flow equalizing pipes are distributed from left to right.

[0013] Preferably, the heat absorption pipe is S-shaped, and the heat absorption pipe sequentially passes through each flow equalizing pipe.

[0014] Preferably, the driving assembly includes a partition plate, the partition plate divides the cavity in the water tank into a reflux cavity and an output cavity, one end of the heat absorption pipe is communicated with the reflux cavity, the other end of the heat absorption pipe is communicated with the output cavity, a second water pump is fixedly installed on the partition plate, and the input and output of the second water pump are communicated with the reflux cavity and the output cavity respectively.

[0015] Preferably, the case is provided with a driver and a controller, and the driver, the controller, the compressor, the electronic and the first water pump are electrically connected.

[0016] Preferably, the case is made of stainless steel.

[0017] Preferably, the evaporimeter and the expansion valve are designed in an integrated manner.

[0018] Compared with the prior art, the battery thermal management system has the advantages that:

[0019] The battery thermal management system of the utility model, through the air of even current hole row is acted to condenser, improve the evenness of air acting to condenser, promote the condenser heat dissipation condensing effect, moreover, through the heat absorption pipe absorbs the heat of air in even current pipe, reduce the temperature of air from even current hole acting to condenser, further promote the condenser heat dissipation condensing effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the perspective view of a kind of battery thermal management system of the utility model;

[0021] Figure 2 It is the front view of a kind of battery thermal management system of the utility model;

[0022] Figure 3 It is the plan view of a kind of battery thermal management system of the utility model;

[0023] Figure 4 It is the left view of a kind of battery thermal management system of the utility model;

[0024] Figure 5 It is the internal structure schematic view of a kind of battery thermal management system of the utility model;

[0025] Figure 6 It is the structure schematic view of auxiliary mechanism.

[0026] Among them:

[0027] Case 1, first water pump 2, condenser 3, expansion valve 4, evaporator 5, compressor 6, fan 7, air hole 8, auxiliary mechanism 9, driver 10, controller 11;

[0028] Even current pipe 91, even current hole 92, water tank 93, heat absorption pipe 94, drive assembly 95, backflow cavity 96, output cavity 97;

[0029] Baffle 951, second water pump 952. DETAILED DESCRIPTION

[0030] As Figures 1-6As shown, the battery thermal management system in the embodiment comprises a cabinet 1, which is made of stainless steel, and a first water pump 2, a condenser 3, an expansion valve 4, an evaporator 5 and a compressor 6 arranged in the cabinet 1, wherein the outlet of the first water pump 2 is connected with a water source, the outlet of the first water pump 2 is connected with the inlet of the evaporator 5, the compressor 6, the condenser 3 and the expansion valve 4 are sequentially connected through pipelines, a fan 7 is fixedly arranged on the front side of the cabinet 1 and used to drive the air in the cabinet 1 to be discharged forward, the fan 7 is provided in plurality, specifically two, and the two fans 7 are arranged side by side, air holes 8 are arranged on the left side, the right side and the rear side of the cabinet 1, and the evaporator 5 and the expansion valve 4 are designed in integrated integration;

[0031] During operation, the compressor 6, the fan 7 and the first water pump 2 are operated, the compressor 6 supplies the gaseous refrigerant in a high-temperature and high-pressure state to the condenser 3, which is cooled and condensed under the strong convection effect of the fan 7 to release a large amount of heat, then flows through the expansion valve 4 to be throttled and decompressed to become low-temperature and low-pressure liquid refrigerant, which is evaporated into gaseous refrigerant in the condenser 3 by absorbing the heat of the antifreeze and is sucked into the compressor 6 to complete the refrigeration cycle; the water pump pumps out the low-temperature cooling liquid to the battery pack water-cooled heat exchange plate to absorb the heat generated during the operation of the battery to achieve the effect of cooling and preventing the battery from being high-temperature;

[0032] The cabinet 1 is provided with an auxiliary mechanism 9, which improves the uniformity of the air acting on the condenser 3 to improve the condensing effect of the condenser 3;

[0033] The auxiliary mechanism 9 comprises a flow equalizing pipe 91, which vertically penetrates through the top and bottom of the cabinet 1, is fixedly connected with the cabinet 1, is located at the rear side of the condenser 3, and is provided with flow equalizing holes 92 on the front side thereof, which are in communication with the cavity in the cabinet 1;

[0034] During the start of the fan 7, the air in the cabinet 1 is discharged from the front side of the cabinet 1, and the air outside the cabinet 1 can be not only transported into the cabinet 1 from the air holes 8 but also transported into the flow equalizing pipe 91 from both ends of the flow equalizing pipe 91, and the air in the flow equalizing pipe 91 is then transported into the cabinet 1 from the flow equalizing holes 92, so that the air discharged from the flow equalizing holes 92 acts on the rear side wall of the condenser 3 to improve the uniformity of the air acting on the condenser 3;

[0035] The flow equalizing holes 92 on the flow equalizing pipe 91 are provided in plurality and are distributed from top to bottom;

[0036] The auxiliary mechanism 9 further comprises a water tank 93 fixedly arranged on the top of the cabinet 1, the water tank 93 is internally provided with cooling water, one side of the water tank 93 is provided with a heat absorption pipe 94, both ends of the heat absorption pipe 94 are in communication with the interior of the water tank 93, the heat absorption pipe 94 penetrates through the flow equalizing pipe 91, a gap is arranged between the heat absorption pipe 94 and the inner wall of the flow equalizing pipe 91, the water tank 93 is internally provided with a driving assembly 95, the driving assembly 95 is used for driving the cooling water in the water tank 93 to flow in the water tank 93 and the heat absorption pipe 94;

[0037] The driving assembly 95 comprises a partition plate 951, the partition plate 951 divides the cavity in the water tank 93 into a return cavity 96 and an output cavity 97, one end of the heat absorption pipe 94 is in communication with the return cavity 96, the other end of the heat absorption pipe 94 is in communication with the output cavity 97, the second water pump 952 is fixedly installed on the partition plate 951, the input port and the output port of the second water pump 952 are respectively in communication with the return cavity 96 and the output cavity 97;

[0038] The flow equalizing pipe 91 is provided in plurality, the plurality of flow equalizing pipes 91 are distributed from left to right;

[0039] The heat absorption pipe 94 is S-shaped, and the heat absorption pipe 94 penetrates through each flow equalizing pipe 91 in sequence;

[0040] During operation, the second water pump 952 is driven, so that the cooling water in the return cavity 96 is transported to the output cavity 97, and the cooling water in the output cavity 97 is returned to the return cavity 96 from the heat absorption pipe 94, so that the circulation of the cooling water is realized, and the heat in the air in the flow equalizing pipe 91 is transferred to the cooling water through the heat absorption pipe 94, so that the temperature of the air acting on the condenser 3 from the flow equalizing hole 92 is reduced, that is, the heat dissipation and condensation effect of the condenser 3 is further improved;

[0041] The cabinet 1 is internally provided with a driver 10 and a controller 11, the driver 10, the controller 11, the compressor 6, the electronic and the first water pump 2 are electrically connected, the driver 10 is directly responsible for the driving and control of the compressor 6, the fan 7 and the first water pump 2, and the controller 11 is responsible for the detection and adjustment of the running state of the whole machine;

[0042] As described above, by acting the air discharged from the flow equalizing hole 92 on the condenser 3, the uniformity of the air acting on the condenser 3 is improved, and the heat dissipation and condensation effect of the condenser 3 is improved, and by absorbing the heat of the air in the flow equalizing pipe 91 through the heat absorption pipe 94, the temperature of the air acting on the condenser 3 from the flow equalizing hole 92 is reduced, and the heat dissipation and condensation effect of the condenser 3 is further improved.

[0043] In addition to the above-mentioned embodiments, the utility model further includes other implementation manners, and the technical solutions formed by using equivalent transformation or equivalent replacement should fall within the protection scope of the utility model claims.

Claims

1. A battery thermal management system, comprising a cabinet (1), a first water pump (2), a condenser (3), an expansion valve (4), an evaporator (5) and a compressor (6) are arranged in the cabinet (1), the output port of the first water pump (2) is connected with a water source, the output port of the first water pump (2) is connected with the input port of the evaporator (5), the compressor (6), the condenser (3) and the expansion valve (4) are sequentially connected through pipelines, a fan (7) is fixedly arranged on the front side of the cabinet (1), the fan (7) is used for driving the air in the cabinet (1) to be discharged forward, air holes (8) are arranged on the left side, the right side and the rear side of the cabinet (1), characterized in that: An auxiliary mechanism (9) is arranged on the cabinet (1); The auxiliary mechanism (9) comprises a flow equalizing pipe (91) vertically penetrating through the top and bottom of the cabinet (1), the flow equalizing pipe (91) is fixedly connected with the cabinet (1), the flow equalizing pipe (91) is located at the rear side of the condenser (3), the flow equalizing pipe (91) is provided with flow equalizing holes (92) in communication with the cavity in the cabinet (1).

2. The battery thermal management system of claim 1, wherein: The flow equalizing holes (92) are located at the front side of the flow equalizing pipe (91).

3. The battery thermal management system of claim 1, wherein: The flow equalizing holes (92) on the flow equalizing pipe (91) are arranged in multiple, and the multiple flow equalizing holes (92) are distributed from top to bottom.

4. A battery thermal management system according to any one of claims 1-3, characterized in that: The auxiliary mechanism (9) further comprises a water tank (93) fixedly arranged on the cabinet (1), the water tank (93) is provided with cooling water, one side of the water tank (93) is provided with a heat absorption pipe (94), both ends of the heat absorption pipe (94) are in communication with the inside of the water tank (93), the heat absorption pipe (94) penetrates through the flow equalizing pipe (91), a gap is arranged between the heat absorption pipe (94) and the inner wall of the flow equalizing pipe (91), and the water tank (93) is provided with a driving assembly (95) for driving the cooling water in the water tank (93) to circulate in the water tank (93) and the heat absorption pipe (94).

5. The battery thermal management system of claim 4, wherein: The flow equalizing pipe (91) is arranged in multiple, and the multiple flow equalizing pipes (91) are distributed from left to right.

6. The battery thermal management system of claim 5, wherein: The heat absorption pipe (94) is S-shaped, and the heat absorption pipe (94) penetrates through each flow equalizing pipe (91) in sequence.

7. The battery thermal management system of claim 4, wherein: The driving assembly (95) comprises a partition plate (951) for separating the cavity in the water tank (93) into a reflux cavity (96) and an output cavity (97), one end of the heat absorption pipe (94) is in communication with the reflux cavity (96), the other end of the heat absorption pipe (94) is in communication with the output cavity (97), and the second water pump (952) is fixedly installed on the partition plate (951), and the input port and the output port of the second water pump (952) are in communication with the reflux cavity (96) and the output cavity (97), respectively.

8. The battery thermal management system of claim 1, wherein: The cabinet (1) is provided with a driver (10) and a controller (11), and the driver (10), the controller (11), the compressor (6), the electronic and the first water pump (2) are electrically connected.

9. The battery thermal management system of claim 1, wherein: The cabinet (1) is made of stainless steel.

10. The battery thermal management system of claim 1, wherein: The evaporator (5) and the expansion valve (4) are designed in integrated form. The evaporator (5) and the expansion valve (4) are designed in integrated form.

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