Power battery liquid cooling device

Abstract

The utility model relates to the technical field of power battery cooling, in particular to a power battery liquid cooling device which comprises a battery outer shell, a plurality of groups of partitioned battery mounting plates are sequentially arranged in the battery outer shell from left to right, and independent liquid cooling supply modules are correspondingly arranged at the lower ends of the battery mounting plates. A first liquid cooling pipeline groove and a second liquid cooling pipeline groove are formed in the front end and the rear end in the battery outer shell, a circulating liquid inlet pipe fixed to the battery outer shell is arranged in the first liquid cooling pipeline groove, and a circulating liquid outlet pipe fixed to the battery outer shell is arranged in the second liquid cooling pipeline groove; the circulating liquid inlet pipe and the circulating liquid outlet pipe are communicated with each other at the same end, each independent liquid cooling module comprises a heat dissipation and temperature conduction plate and a cooling pipe group which is arranged at the lower end of the heat dissipation and temperature conduction plate in a matched manner, and the cooling pipe group is communicated in the circulating liquid inlet pipe and the circulating liquid outlet pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery cooling technical field especially relates to a power battery liquid cooling device. BACKGROUND

[0002] Power battery is an important component for driving electric vehicles, it can store and release a large amount of electric energy for vehicle operation, with the increasing demand for sustainable transportation around the world, power battery becomes one of the core technologies in the field of electric vehicles, power battery converts electric energy into chemical energy through chemical reaction, and converts chemical energy back into electric energy when needed, it is composed of positive electrode, negative electrode and electrolyte, each part bears a specific function, a series of chemical reactions occur in the charging and discharging process of power battery, most of these chemical reactions are accompanied by heat generation, in the discharging process, lithium ions are released from the positive electrode, these lithium ions migrate to the negative electrode through the electrolyte to form an electric current, this process generates heat, in order to avoid heat accumulation causing thermal runaway, a suitable thermal management system is needed to cool the battery, efficient battery thermal management system improves the operating efficiency of the battery by managing the heat of lithium ion battery, and improves the safety, reliability of the battery, slows down the aging rate of the battery and prolongs the service life.

[0003] At present, the Chinese patent with publication number CN211376879U discloses a power battery liquid cooling device and a power battery system, when the power battery liquid cooling device exchanges heat with the battery cell module, the cooling liquid first flows through the water inlet side pipe and the liquid cooling flow channel in sequence from the total water inlet, so that the cooling liquid exchanges heat with the battery cell module when flowing through the liquid cooling flow channel, and then flows out of the total water outlet through the water outlet side pipe, in addition, by arranging a plurality of liquid cooling plates arranged in sequence, since the adjacent two liquid cooling plates are connected by a hose and a three-way joint, it is beneficial to eliminate the stress between the adjacent two liquid cooling plates, so that the power battery liquid cooling device maintains better flatness, so that the power battery liquid cooling device can be in good contact with the battery cell module when exchanging heat with the battery cell module, although the device avoids the problem that the existing technology uses hard pipe to connect the liquid cooling plate, resulting in poor overall flatness of the liquid cooling device and uneven heating of the battery cell module, but its cooling pipe design is relatively traditional, and it does not match the design of the current power battery module, and once a part of the pipe appears a problem, the cooling and liquid supply system of the whole power battery will be completely stopped. UTILITY MODEL CONTENTS

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a power battery liquid cooling device, and the above technical purpose is realized by the following technical scheme:

[0005] The utility model provides a kind of power battery liquid cooling device, including battery shell, the inside of the battery shell is sequentially provided with multiple groups of partitioned battery mounting plate from left to right, the lower end of the battery mounting plate is correspondingly provided with independent liquid cooling supply module, the front and rear ends of the inside of the battery shell are provided with first liquid cooling pipe groove, second liquid cooling pipe groove, the inside of the first liquid cooling pipe groove is provided with circulating liquid inlet pipe fixed to battery shell, the inside of the second liquid cooling pipe groove is provided with circulating liquid outlet pipe also fixed to battery shell, the circulating liquid inlet pipe and circulating liquid outlet pipe are interconnected at the same end, and the independent liquid cooling supply module includes heat dissipation guide temperature plate, cooling pipe group matched with the lower end of heat dissipation guide temperature plate, and the cooling pipe group is connected to the circulating liquid inlet pipe and the circulating liquid outlet pipe.

[0006] Further, the bottom end of the battery shell is provided with a module liquid inlet pipe, which is arranged in the gap space between each group of partitioned battery mounting plates. One end of the module liquid inlet pipe is connected to the pipe of the circulating liquid inlet pipe. An inlet control pump is fixedly arranged at the liquid inlet end of the module liquid inlet pipe.

[0007] Further, the bottom end of the battery shell is provided with a module liquid outlet pipe, which is also arranged in the gap space between each group of partitioned battery mounting plates. The module liquid outlet pipe is arranged on one side of the module liquid inlet pipe. One end of the module liquid outlet pipe is connected to the pipe of the circulating liquid outlet pipe. An outlet control pump is fixedly arranged at the liquid outlet end of the module liquid inlet pipe.

[0008] Further, the independent liquid cooling supply module further includes a heat dissipation sealing cover, which is sealingly fixed to the lower end of the heat dissipation guide temperature plate. The heat dissipation sealing cover has a one-way liquid cooling tank inside. The module liquid inlet pipe and the module liquid outlet pipe are respectively connected to the two ends of one side of the heat dissipation sealing cover.

[0009] Further, the number of heat dissipation sealing covers is two. The two heat dissipation sealing covers are respectively fixed to the front and rear sides of the bottom end of the heat dissipation guide temperature plate.

[0010] Further, a circulating connection pipe is fixed between the circulating liquid inlet pipe and the circulating liquid outlet pipe. The circulating connection pipe has an emergency liquid discharge port.

[0011] In summary, the utility model has the following beneficial effects:

[0012] ①The liquid cooling device disclosed by the utility model has an independent partitioned liquid cooling supply system, which matches the current design concept of power battery modularization. The corresponding number of liquid cooling industrial branches is selected and arranged according to the number of power battery modules, to ensure that the liquid cooling supply system below each group of power batteries independently maintains work, the liquid supply and discharge of the liquid cooling supply system at each position are stable, and only the corresponding partition needs to be maintained when maintaining it.

[0013] ②The utility model discloses a liquid cooling device, and each group of heat dissipation partition is equipped with two sets of independent liquid supply systems, which can effectively improve the liquid cooling effect and ensure that the battery temperature is effectively controlled. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the utility model and constitute a part of the application, illustrate the utility model and together with the description serve to explain the principle of the utility model, and the utility model is illustrated by the following drawings in which:

[0015] Figure 1 is the top view of the utility model;

[0016] Figure 2 is the enlarged schematic view of A in the utility model; Figure 1

[0017] Figure 3 is the schematic view of the heat dissipation sealing cover in the utility model.

[0018] In the drawing, 1 is a battery shell, 2 is a battery mounting plate, 3 is a first liquid cooling pipe groove, 4 is a second liquid cooling pipe groove, 5 is a circulating liquid inlet pipe, 6 is a circulating liquid outlet pipe, 7 is a heat dissipation temperature guide plate, 8 is a module liquid inlet pipe, 9 is a liquid inlet control pump, 10 is a module liquid outlet pipe, 11 is a liquid outlet control pump, 12 is a heat dissipation sealing cover, 13 is a liquid cooling tank, 14 is a circulating connection pipe, and 15 is an emergency liquid discharge port. DETAILED DESCRIPTION

[0019] The foregoing and other technical contents, features and effects of the utility model will be described in detail below with reference to the accompanying drawings. Figure 1 to the accompanying drawings. Figure 3 The detailed description of the embodiments will be clearly presented. The structural contents mentioned in the following embodiments are all referred to the drawings.

[0020] The utility model will be described below with reference to the accompanying drawings. EMBODIMENT

[0021] A power battery liquid cooling device, comprising a battery shell 1, the inside of the battery shell 1 is used to place power battery, the battery shell 1 is used as the bearing structure of power battery, a plurality of groups of partition type battery mounting plates 2 are sequentially arranged in the inside of the battery shell 1 from left to right, since the power battery is also modular design nowadays, therefore, the power battery of modular structure can be placed in different battery mounting plates 2.

[0022] ​The front and rear ends inside the battery shell 1 are provided with a first liquid cooling pipe groove 3 and a second liquid cooling pipe groove 4. One end of the first liquid cooling pipe groove 3 is an inlet, and one end of the second liquid cooling pipe groove 4 is an outlet. The inlet and the outlet are used to communicate with the external cooling liquid. The inside of the first liquid cooling pipe groove 3 is provided with a circulating inlet pipe 5 fixed to the battery shell 1. The inside of the second liquid cooling pipe groove 4 is provided with a circulating outlet pipe 6 also fixed to the battery shell 1. The circulating inlet pipe 5 and the circulating outlet pipe 6 are connected to each other at the same end. A circulating connection pipe 14 is fixed between the two pipes. The circulating connection pipe 14 is provided with an emergency liquid discharge port 15. In the above pipe structure, the circulating inlet pipe 5, the circulating outlet pipe 6, and the circulating connection pipe 14 form the total pipe of the embodiment. The emergency liquid discharge port 15 is arranged at the circulating connection pipe 14. In the case of abnormal system pipe pressure or liquid leakage, the cooling liquid can be discharged in emergency to empty the pipe.

[0023] The lower end of the battery mounting plate 2 is correspondingly provided with an independent liquid cooling supply module. The independent liquid cooling supply module includes a heat dissipation temperature guide plate 7 and a cooling pipe group arranged at the lower end of the heat dissipation temperature guide plate 7. The cooling pipe group is connected to the circulating inlet pipe 5 and the circulating outlet pipe 6. The cooling pipe group is composed of a module inlet pipe 8 and a module outlet pipe 10. The module inlet pipe 8 and the module outlet pipe 10 are branches of the total pipe.

[0024] Preferably, the bottom end of the battery shell is provided with a module inlet pipe 8. The module inlet pipe 8 is arranged in the gap space between each group of partitioned battery mounting plates 2. One end of the module inlet pipe 8 is connected to the pipe of the circulating inlet pipe 5. An inlet control pump 9 is fixedly arranged at the inlet end of the module inlet pipe 8.

[0025] Preferably, the bottom end of the battery shell is provided with a module outlet pipe 10. The module outlet pipe 10 is also arranged in the gap space between each group of partitioned battery mounting plates 2. The module outlet pipe 10 is arranged on one side of the module inlet pipe 8. One end of the module outlet pipe 10 is connected to the pipe of the circulating outlet pipe 6. An outlet control pump 11 is fixedly arranged at the outlet end of the module inlet pipe 8.

[0026] Through the above branch structure, the inlet control pump 9 delivers the cooling liquid in the circulating inlet pipe 5 to the module inlet pipe 8, and the outlet control pump 11 delivers the cooling liquid to the circulating outlet pipe 6.

[0027] The independent liquid cooling supply module further comprises heat dissipation sealing covers 12, which are sealingly fixed to the lower end of the heat dissipation temperature guide plate 7. The number of the heat dissipation sealing covers 12 is set to two groups, and the two groups of heat dissipation sealing covers 12 are respectively fixed to the front and rear sides of the bottom end of the heat dissipation temperature guide plate 7, and are respectively used for controlling the temperature in the front and rear two groups of partitions of the heat dissipation temperature guide plate 7. The inside of the heat dissipation sealing cover 12 is provided with a one-way flow liquid cooling tank 13. The module liquid inlet pipe 8 and the module liquid outlet pipe 10 are respectively connected to the positions at both ends of one side of the heat dissipation sealing cover 12. When the cooling liquid flows through the heat dissipation sealing cover 12, the heat on the heat dissipation temperature guide plate 7 is taken away, so as to achieve the purpose of heat dissipation and cooling.

[0028] The above is a further detailed description of the present application in combination with the specific embodiments, and cannot be regarded as the limitation of the specific embodiments of the present application; for the skilled in the art and the related technical field, the expansion, operation method and data replacement made on the basis of the technical scheme of the present application should be within the protection scope of the present application.

Claims

1. A liquid cooling device for a power battery, characterized in that: The battery shell body (1) is internally provided with a plurality of partitioned battery mounting plates (2) from left to right, and the lower end of the battery mounting plate (2) is correspondingly provided with an independent liquid cooling supply module, and the front and rear ends of the battery shell body (1) are provided with a first liquid cooling pipe groove (3) and a second liquid cooling pipe groove (4), the inside of the first liquid cooling pipe groove (3) is provided with a circulating liquid inlet pipe (5) fixed to the battery shell body (1), the inside of the second liquid cooling pipe groove (4) is provided with a circulating liquid outlet pipe (6) also fixed to the battery shell body (1), the circulating liquid inlet pipe (5) and the circulating liquid outlet pipe (6) are connected at the same end, and the independent liquid cooling supply module comprises a heat dissipation guide temperature plate (7) and a cooling pipe group matched with the lower end of the heat dissipation guide temperature plate (7).

2. The liquid cooling device for power battery according to claim 1, characterized in that: The bottom end of the battery shell is provided with a module liquid inlet pipe (8), the module liquid inlet pipe (8) is arranged at the gap space between each group of partitioned battery mounting plates (2), one end of the module liquid inlet pipe (8) is connected to the pipe of the circulating liquid inlet pipe (5), and the liquid inlet end of the module liquid inlet pipe (8) is fixedly provided with a liquid inlet control pump (9).

3. The liquid cooling device for power battery according to claim 2, characterized in that: The bottom end of the battery shell is provided with a module liquid outlet pipe (10), the module liquid outlet pipe (10) is also arranged at the gap space between each group of partitioned battery mounting plates (2), the module liquid outlet pipe (10) is arranged on one side of the module liquid inlet pipe (8), one end of the module liquid outlet pipe (10) is connected to the pipe of the circulating liquid outlet pipe (6), and the liquid outlet end of the module liquid inlet pipe (8) is fixedly provided with a liquid outlet control pump (11).

4. The liquid cooling device for power battery according to claim 3, characterized in that: The independent liquid cooling supply module further comprises a heat dissipation sealing cover (12), the heat dissipation sealing cover (12) is sealingly fixed to the lower end of the heat dissipation guide temperature plate (7), the inside of the heat dissipation sealing cover (12) is provided with a one-way liquid cooling tank (13), and the module liquid inlet pipe (8) and the module liquid outlet pipe (10) are respectively connected to the two end positions on one side of the heat dissipation sealing cover (12).

5. The liquid cooling device for power battery according to claim 4, characterized in that: The number of the heat dissipation sealing covers (12) is two, and the two heat dissipation sealing covers (12) are respectively fixed to the front and rear sides of the bottom end of the heat dissipation guide temperature plate (7).

6. The liquid cooling device for power battery according to claim 1, characterized in that: The circulating connection pipe (14) is fixed between the circulating liquid inlet pipe (5) and the circulating liquid outlet pipe (6), and the circulating connection pipe (14) is provided with an emergency liquid discharge port (15).

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