Battery box temperature control system

Abstract

The utility model relates to and discloses a battery box temperature control system. Relates to the technical field of new energy batteries. The battery pack comprises a lower box body internally provided with a containing cavity, a battery module arranged in the containing cavity, an upper cover plate fixedly connected with the lower box body, a temperature control assembly arranged in the containing cavity, and a liquid supply assembly connected with the temperature control assembly; the upper cover plate is used for sealing the accommodating cavity, the liquid supply assembly is used for conveying cold liquid or hot liquid to the temperature control assembly, and the temperature control assembly is distributed on the periphery of the battery module and is used for controlling the temperature of the battery module. The temperature control assembly is distributed on the periphery of the battery module, the liquid supply assembly is used for conveying the cold liquid or the hot liquid to the temperature control assembly, and the temperature control assembly exchanges heat with the battery module and cools or heats the battery module, so that the refrigeration of the battery box can be realized, the heating of the battery box can also be realized, and the refrigeration and the heating are uniform; therefore, the environment temperature in the battery box is kept at the optimal working temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field especially relates to a battery box temperature control system. BACKGROUND

[0002] In the process of charging and discharging of the power battery box, there is a requirement for the best working temperature range. It is found that the battery can obtain a longer service life under the environment of 25 DEG C. If the long-term operating temperature rises by 10 DEG C, the service life is reduced by about half. Within the environment temperature of 25 DEG C to 0 DEG C, the discharge capacity is reduced by about 1% for every 1 DEG C drop. Due to the influence of the external environment or the heat generated by the battery box itself during operation, the battery box will face the situation of low temperature or high temperature or uneven temperature. If the temperature in the battery box exceeds the normal working range, it will lead to unbalanced battery performance, and further reduce the efficiency of the battery box and affect the service life. The traditional battery box generally has no heat management device or only single refrigeration or heating function, which cannot fully meet the actual demand, and has problems such as poor refrigeration or heating uniformity and poor safety.

[0003] Chinese patent CN213936349U, published on August 10, 2021, discloses a battery box, which comprises a box body, a plurality of batteries are arranged in the box body, and there is a gap between adjacent two batteries; a plurality of cooling boxes are arranged in the box body, and the cooling boxes are located between adjacent two batteries; the inside of the cooling box is a cavity, and the cooling box contains a cooling medium; and a circulation assembly for circulating the cooling medium in the cooling box is further arranged on the box body. However, the battery box only has a single cooling function, which cannot fully meet the actual demand. UTILITY MODEL CONTENTS

[0004] The utility model aims at the deficiency of the prior art, and provides a battery box temperature control system, which can realize refrigeration and heating of the battery box, and the refrigeration and heating are uniform, so that the environmental temperature in the battery box is maintained at the best working temperature, and the performance and safety of the battery box are ensured.

[0005] The utility model provides a battery box temperature control system, which comprises a lower box body with a containing cavity, a battery module arranged in the containing cavity, an upper cover plate fixedly connected with the lower box body, a temperature control assembly arranged in the containing cavity, and a liquid supply assembly connected with the temperature control assembly; the upper cover plate is used for closing the containing cavity, the liquid supply assembly is used for supplying cold liquid or hot liquid to the temperature control assembly, and the temperature control assembly is distributed around the battery module and used for temperature control of the battery module.

[0006] Further, the temperature control assembly comprises a first side temperature control plate and a second side temperature control plate respectively arranged on opposite sides of the battery module, and a side liquid cooling channel for flowing of cold liquid or hot liquid is arranged in each of the first side temperature control plate and the second side temperature control plate.

[0007] Further, the liquid supply assembly comprises a liquid inlet connector in communication with the first side temperature control plate, a liquid outlet connector in communication with the second side temperature control plate, and a communication pipe connecting the first side temperature control plate and the second side temperature control plate.

[0008] Further, the liquid supply assembly further comprises a liquid storage tank for loading of cooling liquid, a liquid delivery pipe connecting the liquid storage tank and the liquid inlet connector, a liquid return pipe connecting the liquid storage tank and the liquid outlet connector, a compressor arranged on the liquid delivery pipe, and a condenser and a heater arranged side by side on the liquid delivery pipe, the compressor being used to provide power for the flow of cooling liquid, the condenser being used to cool the cooling liquid to form cold liquid, and the heater being used to heat the cooling liquid to form hot liquid.

[0009] Further, the liquid delivery pipe comprises a first branch pipe and a second branch pipe arranged side by side, the condenser is arranged in the first branch pipe, and the heater is arranged in the second branch pipe, the liquid supply assembly further comprises a first electromagnetic valve arranged in the first branch pipe and a second electromagnetic valve arranged in the second branch pipe, the first electromagnetic valve being used to control opening or closing of the first branch pipe, and the second electromagnetic valve being used to control opening or closing of the second branch pipe.

[0010] Further, the temperature control assembly further comprises a bottom temperature control plate arranged at the bottom of the battery module, and a bottom liquid cooling channel for flowing of cold liquid or hot liquid is arranged in the bottom temperature control plate.

[0011] Further, the liquid inlet connector and the liquid outlet connector are all three-way connectors, a first end of the liquid inlet connector is in communication with the liquid delivery pipe, a second end thereof is in communication with the first side temperature control plate, and a third end thereof is in communication with the bottom temperature control plate, and a first end of the liquid outlet connector is in communication with the liquid return pipe, a second end thereof is in communication with the second side temperature control plate, and a third end thereof is in communication with the bottom temperature control plate.

[0012] Further, the temperature control assembly further comprises a temperature measurement plate arranged at the periphery of the battery module, and the temperature measurement plate is used to detect the temperature of the battery module.

[0013] Further, the battery module comprises a first cell group and a second cell group arranged in parallel and at intervals, the first side temperature control plate is two arranged on the same side of the first cell group and the second cell group respectively, and the second side temperature control plate is two arranged on the same side of the first cell group and the second cell group respectively.

[0014] Further, the temperature control assembly further comprises first heat preservation cotton arranged between the inner wall of the accommodating cavity and the first side-arranged temperature control plate, the second side-arranged temperature control plate and the bottom-arranged temperature control plate, and second heat preservation cotton arranged between the first side-arranged temperature control plate and the second side-arranged temperature control plate.

[0015] The battery box temperature control system has the following beneficial effects:

[0016] (1) The temperature control assembly of the battery box temperature control system is distributed on the outer periphery of the battery module, the liquid supply assembly is used to supply cold liquid or hot liquid to the temperature control assembly, heat exchange is performed between the temperature control assembly and the battery module, and the battery module is cooled or heated, so that the refrigeration and heating of the battery box are realized, the refrigeration and heating are uniform, and the ambient temperature in the battery box is maintained at the optimal working temperature, thereby ensuring the performance and safety of the battery box.

[0017] (2) The temperature control assembly of the battery box temperature control system comprises a first side-arranged temperature control plate and a second side-arranged temperature control plate, the first side-arranged temperature control plate and the second side-arranged temperature control plate are arranged on opposite sides of the battery module, heat exchange is performed between the first side-arranged temperature control plate, the second side-arranged temperature control plate and the battery module when the cold liquid or hot liquid flows through the side-arranged liquid cooling channels of the first side-arranged temperature control plate and the second side-arranged temperature control plate, and the refrigeration and heating of the battery box are realized, and the refrigeration and heating are uniform.

[0018] (3) The liquid supply pipe of the battery box temperature control system comprises a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe are arranged side by side, the condenser is arranged on the first branch pipe, the heater is arranged on the second branch pipe, the liquid supply assembly further comprises a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve is arranged on the first branch pipe, the second electromagnetic valve is arranged on the second branch pipe, the opening or closing of the first branch pipe is controlled by the first electromagnetic valve, the opening or closing of the second branch pipe is controlled by the second electromagnetic valve, and the delivery of the cold liquid or hot liquid by the liquid supply assembly is realized.

[0019] (4) The temperature control assembly of the battery box temperature control system further comprises a bottom-arranged temperature control plate, the bottom-arranged temperature control plate is arranged at the bottom of the battery module, so that the first side-arranged temperature control plate, the second side-arranged temperature control plate and the bottom-arranged temperature control plate simultaneously perform heat exchange with the battery module, thereby improving the refrigeration or heating efficiency of the battery module and making the refrigeration or heating more uniform.

[0020] (5) The temperature control assembly of the battery box temperature control system further comprises a temperature measurement plate, when the battery module is arranged in the accommodating cavity of the lower box body, the side temperature plate is arranged on the outer periphery of the battery module, so that the temperature of the battery module is detected by the temperature measurement plate.

[0021] (6) The battery box temperature control system reduces the temperature influence of the external environment on the first side-mounted temperature control plate, the second side-mounted temperature control plate and the bottom-mounted temperature control plate through the first thermal insulation cotton and the second thermal insulation cotton, so that the efficiency of battery module refrigeration or heating can be improved, the refrigeration or heating is more uniform, the environmental temperature in the battery box is further ensured to be maintained at the optimal working temperature, and the performance and safety of the battery box are ensured; BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In these drawings, like reference numerals are used to represent like elements.

[0023] Fig. 1 It is an assembly explosion view of the battery box temperature control system of the embodiment of the present application.

[0024] Fig. 2 It is a structural schematic view of the lower box body of the battery box temperature control system of the embodiment of the present application.

[0025] Fig. 3 It is a structural schematic view of the battery module outer periphery of the temperature control assembly of the battery box temperature control system of the embodiment of the present application.

[0026] Fig. 4 It is a structural schematic view of the temperature control assembly of the battery box temperature control system of the embodiment of the present application.

[0027] Fig. 5 It is a structural schematic view of the temperature control assembly of the battery box temperature control system of the embodiment of the present application without the first thermal insulation cotton and the second thermal insulation cotton.

[0028] Fig. 6 It is a structural schematic view of the liquid supply assembly and the temperature control assembly of the battery box temperature control system of the embodiment of the present application.

[0029] In the figure: 1, lower box body; 11, containing cavity; 2, battery module; 21, first cell group; 22, second cell group; 3, temperature control assembly; 31, first side-mounted temperature control plate; 32, second side-mounted temperature control plate; 33, temperature measurement plate; 34, first thermal insulation cotton; 35, second thermal insulation cotton; 4, liquid supply assembly; 41, liquid inlet connector; 42, liquid outlet connector; 43, communication pipe; 44, liquid storage tank; 45, liquid delivery pipe; 451, first branch pipe; 4511, first electromagnetic valve; 452, second branch pipe; 4521, second electromagnetic valve; 46, liquid return pipe; 47, compressor; 48, condenser; 49, heater; 5, upper cover plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, all other embodiments obtained by the ordinary skilled in the art without creative labor based on the embodiments in the utility model belong to the range protected by the utility model.

[0031] Please refer to Figs. 1-6 The utility model embodiment of a battery box temperature control system, including lower box body 1, battery module 2 and upper cover plate 5, the lower box body 1 is equipped with the containing cavity 11 of top opening, battery module 2 sets up in containing cavity 11, upper cover plate 5 is fixedly connected with lower box body 1, through the top opening of containing cavity 11 is closed by upper cover plate 5, to form a sealed box body to the loading of battery module 2.

[0032] The battery box temperature control system further includes temperature control assembly 3 and liquid supply assembly 4, temperature control assembly 3 sets up in containing cavity 11, and is distributed at the outer periphery of battery module 2, and liquid supply assembly 4 is communicated with temperature control assembly 3.When the temperature of battery module 2 is too high, through liquid supply assembly 4 to temperature control assembly 3 transports cold night, cold liquid flows through temperature control assembly 3, and in the process, through temperature control assembly 3 and battery module 2 heat exchange, to battery module 2 cooling, realize the refrigeration of battery module 2.

[0033] When the temperature of battery module 2 is too low, through liquid supply assembly 4 to temperature control assembly 3 transports hot night, hot liquid flows through temperature control assembly 3, and in the process, through temperature control assembly 3 and battery module 2 heat exchange, to enhance the temperature of battery module 2, realize the heating of battery module 2, to guarantee the ambient temperature in the battery box to maintain at its optimum working temperature, guarantee the performance and safety of battery box.

[0034] In the embodiment, temperature control assembly 3 includes first side temperature control plate 31 and second side temperature control plate 32, and the first side temperature control plate 31 and the second side temperature control plate 32 are arranged on opposite sides of the battery module 2. The side liquid cooling channels are arranged in the first side temperature control plate 31 and the second side temperature control plate 32. The liquid supply assembly 4 is communicated with the side liquid cooling channels in the first side temperature control plate 31 and the second side temperature control plate 32.

[0035] When the temperature of battery module 2 is too high, through liquid supply assembly 4 to first side temperature control plate 31 and second side temperature control plate 32 transports cold night, cold liquid flows through side liquid cooling channel, and in the process, through first side temperature control plate 31 and second side temperature control plate 32 and battery module 2 heat exchange, to battery module 2 cooling, realize the refrigeration of battery module 2.

[0036] When the temperature of the battery module 2 is too low, the liquid supply assembly 4 supplies hot liquid to the first side-mounted temperature control plate 31 and the second side-mounted temperature control plate 32. The hot liquid flows through the side-mounted liquid cooling channels, and in the process, the first side-mounted temperature control plate 31 and the second side-mounted temperature control plate 32 exchange heat with the battery module 2, thereby increasing the temperature of the battery module 2, achieving heating of the battery module 2, and further ensuring that the ambient temperature in the battery box is maintained at its optimal working temperature, ensuring the performance and safety of the battery box.

[0037] In this embodiment, the liquid supply assembly 4 includes a liquid inlet connector 41, a liquid outlet connector 42, and a communication pipe 43. The liquid inlet connector 41 communicates with the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31. The liquid outlet connector 42 communicates with the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32. The communication pipe 43 connects the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 with the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32.

[0038] When the temperature of the battery module 2 is too high, the liquid supply assembly 4 supplies cold liquid to the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 through the liquid inlet connector 41. The cold liquid flows through the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 and the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32 in turn, and then flows out through the liquid outlet connector 42. In the process of the cold liquid flowing through the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 and the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32, the first side-mounted temperature control plate 31 and the second side-mounted temperature control plate 32 exchange heat with the battery module 2, thereby cooling the battery module 2 and achieving refrigeration of the battery module 2.

[0039] When the temperature of the battery module 2 is too low, the liquid supply assembly 4 supplies hot liquid to the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 through the liquid inlet connector 41. The hot liquid flows through the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 and the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32 in turn, and then flows out through the liquid outlet connector 42. In the process of the hot liquid flowing through the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 and the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32, the first side-mounted temperature control plate 31 and the second side-mounted temperature control plate 32 exchange heat with the battery module 2, thereby increasing the temperature of the battery module 2 and achieving heating of the battery module 2.

[0040] In the embodiment, the liquid supply assembly 4 further comprises a liquid storage tank 44, a liquid supply pipe 45, a liquid return pipe 46 and a compressor 47. The liquid storage tank 44 is used to store the cooling liquid. One end of the liquid supply pipe 45 is in communication with the liquid storage tank 44, and the other end is in communication with the liquid inlet joint 41, so that the cooling liquid in the liquid storage tank 44 can flow into the liquid cooling channel in the first side-mounted temperature control plate 31 through the liquid supply pipe 45 and the liquid inlet joint 41. One end of the liquid return pipe 46 is in communication with the liquid storage tank 44, and the other end is in communication with the liquid outlet joint 42, so that the cooling liquid in the liquid cooling channel in the second side-mounted temperature control plate 32 can flow back to the liquid storage tank 44 through the liquid outlet joint 42 and the liquid return pipe 46.

[0041] The compressor 47 is arranged on the liquid supply pipe 45. The compressor 47 is powered to drive the cooling liquid in the liquid storage tank 44 to flow through the liquid supply pipe 45, the liquid inlet joint 41, the liquid cooling channel in the first side-mounted temperature control plate 31, the liquid cooling channel in the second side-mounted temperature control plate 32, the liquid outlet joint 42 and the liquid return pipe 46 in sequence, and then flow back to the liquid storage tank 44, so as to realize the recycling of the cooling liquid, save resources and reduce production cost.

[0042] In the application, the liquid supply assembly 4 further comprises a condenser 48 and a heater 49. The condenser 48 and the heater 49 are arranged side by side on the liquid supply pipe 45. When the temperature of the battery module 2 is too high, the cooling liquid in the liquid storage tank 44 flows through the condenser 48 on the liquid supply pipe 45, and the condenser 48 is used to cool the cooling liquid, so as to form cold liquid. When the temperature of the battery module 2 is too low, the cooling liquid in the liquid storage tank 44 flows through the heater 49 on the liquid supply pipe 45, and the heater 49 is used to heat the cooling liquid, so as to form hot liquid.

[0043] In the embodiment, the liquid supply pipe 45 comprises a first branch pipe 451 and a second branch pipe 452. The first branch pipe 451 and the second branch pipe 452 are arranged side by side. The condenser 48 is arranged on the first branch pipe 451, and the heater 49 is arranged on the second branch pipe 452. The liquid supply assembly 4 further comprises a first electromagnetic valve 4511 and a second electromagnetic valve 4521. The first electromagnetic valve 4511 is arranged on the first branch pipe 451, and the second electromagnetic valve 4521 is arranged on the second branch pipe 452.

[0044] When the temperature of the battery module 2 is too high, the first electromagnetic valve 4511 is opened, and the second electromagnetic valve 4521 is closed, so that the cooling liquid in the liquid delivery pipe 45 flows through the condenser 48 on the first branch pipe 451, the cooling liquid is cooled by the condenser 48 to form cold liquid, so that the liquid delivery pipe 45 delivers the cold liquid to the side-arranged liquid cooling channel in the first side-arranged temperature control plate 31 through the liquid inlet joint 41, and then in the process of flowing through the side-arranged liquid cooling channel in the first side-arranged temperature control plate 31 and the side-arranged liquid cooling channel in the second side-arranged temperature control plate 32, the first side-arranged temperature control plate 31 and the second side-arranged temperature control plate 32 exchange heat with the battery module 2, so as to cool the battery module 2 and realize the refrigeration of the battery module 2.

[0045] When the temperature of the battery module 2 is too low, the first electromagnetic valve 4511 is closed, and the second electromagnetic valve 4521 is opened, so that the cooling liquid in the liquid delivery pipe 45 flows through the heater 49 on the second branch pipe 452, the cooling liquid is heated by the heater 49 to form hot liquid, so that the liquid delivery pipe 45 delivers the hot liquid to the side-arranged liquid cooling channel in the first side-arranged temperature control plate 31 through the liquid inlet joint 41, and then in the process of flowing through the side-arranged liquid cooling channel in the first side-arranged temperature control plate 31 and the side-arranged liquid cooling channel in the second side-arranged temperature control plate 32, the first side-arranged temperature control plate 31 and the second side-arranged temperature control plate 32 exchange heat with the battery module 2, so as to increase the temperature of the battery module 2 and realize the heating of the battery module 2.

[0046] In the embodiment, the temperature control assembly 3 further comprises a bottom-arranged temperature control plate (not shown in the figure), which is arranged at the bottom of the battery module 2 and is provided with a bottom-arranged liquid cooling channel. When the temperature of the battery module 2 is too high, the bottom-arranged temperature control plate is supplied with cold liquid by the liquid supply assembly 4, and in the process of flowing through the bottom-arranged liquid cooling channel, the bottom-arranged temperature control plate exchanges heat with the battery module 2, so as to cool the battery module 2 and realize the refrigeration of the battery module 2.

[0047] When the temperature of the battery module 2 is too low, the bottom-arranged temperature control plate is supplied with hot liquid by the liquid supply assembly 4, and in the process of flowing through the bottom-arranged liquid cooling channel, the bottom-arranged temperature control plate exchanges heat with the battery module 2, so as to increase the temperature of the battery module 2 and realize the heating of the battery module 2, further ensuring that the ambient temperature in the battery box is maintained at the optimal working temperature, and protecting the performance and safety of the battery box.

[0048] In the embodiment, the liquid inlet joint 41 and the liquid outlet joint 42 are all three-way joints, wherein the first end of the liquid inlet joint 41 is communicated with the liquid delivery pipe 45, the second end is communicated with the first side-mounted temperature control plate 31, and the third end is communicated with the bottom-mounted temperature control plate; the first end of the liquid outlet joint 42 is communicated with the liquid return pipe 46, the second end is communicated with the second side-mounted temperature control plate 32, and the third end is communicated with the bottom-mounted temperature control plate, so that when the cold liquid or the hot liquid is output from the liquid delivery pipe 45, part of the cold liquid or the hot liquid flows to the first side-mounted temperature control plate 31 through the liquid inlet joint 41, and then flows through the side-mounted liquid cooling channel in the first side-mounted temperature control plate 31 and the side-mounted liquid cooling channel in the second side-mounted temperature control plate 32 in turn, and finally flows to the liquid return pipe 46 through the liquid outlet joint 42.

[0049] Another part of the cold liquid or the hot liquid flows to the bottom-mounted temperature control plate through the liquid inlet joint 41, and then flows through the bottom-mounted liquid cooling channel in the bottom-mounted temperature control plate, and finally flows to the liquid return pipe 46 through the liquid outlet joint 42, so that the first side-mounted temperature control plate 31, the second side-mounted temperature control plate 32 and the bottom-mounted temperature control plate can simultaneously exchange heat with the battery module 2, thereby improving the efficiency of refrigeration or heating of the battery module 2, making the refrigeration or heating more uniform, and further ensuring that the temperature in the battery box is maintained at the optimal working temperature, and the performance and safety of the battery box are ensured.

[0050] In the embodiment, the temperature control assembly 3 further comprises a temperature measurement plate 33, which is arranged at the outer periphery of the battery module 2 when the battery module 2 is arranged in the accommodating cavity 11 of the lower box body 1, so as to detect the temperature of the battery module 2 through the temperature measurement plate 33. It can be predicted that a temperature sensor is arranged on the temperature measurement plate 33, and when the temperature sensor on the temperature measurement plate 33 detects that the temperature of the battery module 2 is too high, an electric signal is transmitted to the control system, the control system controls the first electromagnetic valve 4511 to open and the second electromagnetic valve 4521 to close, and controls the condenser 48 and the compressor 47 to operate at the same time, so that the liquid delivery pipe 45 delivers cold liquid to the first side-mounted temperature control plate 31, the second side-mounted temperature control plate 32 and the bottom-mounted temperature control plate.

[0051] When the temperature sensor on the temperature measurement plate 33 detects that the temperature of the battery module 2 is too low, an electric signal is transmitted to the control system, the control system controls the first electromagnetic valve 4511 to close and the second electromagnetic valve 4521 to open, and controls the heater 49 and the compressor 47 to operate at the same time, so that the liquid delivery pipe 45 delivers hot liquid to the first side-mounted temperature control plate 31, the second side-mounted temperature control plate 32 and the bottom-mounted temperature control plate; when the temperature sensor on the temperature measurement plate 33 detects that the temperature of the battery module 2 is in the optimal working temperature range, an electric signal is transmitted to the control system, and the control system controls the condenser 48, the heater 49 and the compressor 47 to stop operating.

[0052] In the embodiment, the battery module 2 comprises a first battery cell group 21 and a second battery cell group 22, which are arranged in parallel and spaced apart in the accommodating cavity 11 of the lower box body 1. The temperature control assembly 3 comprises two first side-arranged temperature control plates 31 and two second side-arranged temperature control plates 32, one of the first side-arranged temperature control plates 31 is arranged on one side of the first battery cell group 21, and the other first side-arranged temperature control plate 31 is arranged on one side of the second battery cell group 22; one of the second side-arranged temperature control plates 32 is arranged on the other side of the first battery cell group 21, and the other second side-arranged temperature control plate 32 is arranged on the other side of the second battery cell group 22.

[0053] Therefore, the liquid inlet connector 41 is in communication with the first side-arranged temperature control plate 31 on the outer side, the liquid outlet connector 42 is in communication with the second side-arranged temperature control plate 32 on the outer side, and the communication pipe 43 is three pipes for communication between the first side-arranged temperature control plate 31 on the outer side and the second side-arranged temperature control plate 32 on the inner side, communication between the second side-arranged temperature control plate 32 on the inner side and the first side-arranged temperature control plate 31 on the inner side, and communication between the first side-arranged temperature control plate 31 on the inner side and the second side-arranged temperature control plate 32 on the outer side.

[0054] The infusion pipe 45 transports cold liquid or hot liquid to the first side-arranged temperature control plate 31 on the outer side through the liquid inlet connector 41, and the cold liquid or hot liquid flows through the side-arranged liquid cooling channels of the first side-arranged temperature control plate 31 on the outer side, the second side-arranged temperature control plate 32 on the inner side, the first side-arranged temperature control plate 31 on the inner side, and the second side-arranged temperature control plate 32 on the outer side in turn, and then flows from the liquid outlet connector 42 to the liquid return pipe 46, so that the refrigeration or heating of the first battery cell group 21 and the second battery cell group 22 is more uniform, and the environmental temperature in the battery box is further guaranteed to maintain at the optimal working temperature, and the performance and safety of the battery box are ensured.

[0055] In the embodiment, the temperature control assembly 3 further comprises first heat preservation cotton 34 and second heat preservation cotton 35, the first heat preservation cotton 34 is a plurality of heat preservation cottons arranged between the inner wall of the accommodating cavity 11 and the first side-arranged temperature control plate 31, the second side-arranged temperature control plate 32, and the bottom-arranged temperature control plate, and the second heat preservation cotton 35 is arranged between adjacent first side-arranged temperature control plates 31 and second side-arranged temperature control plates 32.

[0056] The temperature influence of the external environment on the first side-arranged temperature control plate 31, the second side-arranged temperature control plate 32, and the bottom-arranged temperature control plate is reduced through the first heat preservation cotton 34 and the second heat preservation cotton 35, so that the refrigeration or heating efficiency of the battery module 2 is improved, the refrigeration or heating is more uniform, the environmental temperature in the battery box is further guaranteed to maintain at the optimal working temperature, and the performance and safety of the battery box are ensured.

[0057] The above-described content can be implemented alone or in various combinations, and these variants are within the protection scope of the utility model.

[0058] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0059] Finally, it should be noted that the above embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack temperature control system, characterized by: The utility model provides a battery module temperature control device, which comprises a lower box (1) internally provided with a containing cavity (11), a battery module (2) arranged in the containing cavity (11), an upper cover plate (5) fixedly connected with the lower box (1), a temperature control assembly (3) arranged in the containing cavity (11), and a liquid supply assembly (4) connected with the temperature control assembly (3); the upper cover plate (5) is used for closing the containing cavity (11), the liquid supply assembly (4) is used for supplying cold liquid or hot liquid to the temperature control assembly (3), and the temperature control assembly (3) is distributed around the battery module (2) and used for controlling the temperature of the battery module (2).

2. A battery pack temperature control system as claimed in claim 1, wherein: The temperature control assembly (3) comprises a first side temperature control plate (31) and a second side temperature control plate (32) arranged on opposite sides of the battery module (2) respectively, and the first side temperature control plate (31) and the second side temperature control plate (32) are internally provided with side liquid cooling channels for the flow of cold liquid or hot liquid.

3. A battery pack temperature control system as claimed in claim 2, wherein: The liquid supply assembly (4) comprises a liquid inlet joint (41) in communication with the first side temperature control plate (31), a liquid outlet joint (42) in communication with the second side temperature control plate (32), and a communication pipe (43) connecting the first side temperature control plate (31) and the second side temperature control plate (32).

4. A battery pack temperature control system as defined in claim 3, wherein: The liquid supply assembly (4) further comprises a liquid storage tank (44) for loading cooling liquid, a liquid conveying pipe (45) connecting the liquid storage tank (44) and the liquid inlet joint (41), a liquid return pipe (46) connecting the liquid storage tank (44) and the liquid outlet joint (42), a compressor (47) arranged on the liquid conveying pipe (45), and a condenser (48) and a heater (49) arranged side by side on the liquid conveying pipe (45); the compressor (47) is used for providing power for the flow of cooling liquid, the condenser (48) is used for refrigerating the cooling liquid to form cold liquid, and the heater (49) is used for heating the cooling liquid to form hot liquid.

5. A battery pack temperature control system as defined in claim 4, wherein: The liquid conveying pipe (45) comprises a first branch pipe (451) and a second branch pipe (452) arranged side by side, the condenser (48) is arranged in the first branch pipe (451), the heater (49) is arranged in the second branch pipe (452), the liquid supply assembly (4) further comprises a first electromagnetic valve (4511) arranged in the first branch pipe (451) and a second electromagnetic valve (4521) arranged in the second branch pipe (452), the first electromagnetic valve (4511) is used for controlling the opening or closing of the first branch pipe (451), and the second electromagnetic valve (4521) is used for controlling the opening or closing of the second branch pipe (452).

6. A battery pack temperature control system as defined in claim 4, wherein: The temperature control assembly (3) further comprises a bottom temperature control plate arranged at the bottom of the battery module (2), and the bottom temperature control plate is internally provided with a bottom liquid cooling channel for the flow of cold liquid or hot liquid.

7. A battery pack temperature control system as defined in claim 6, wherein: The liquid inlet joint (41) and the liquid outlet joint (42) are all three-way joints, the first end of the liquid inlet joint (41) is communicated with the liquid conveying pipe (45), the second end is communicated with the first side-mounted temperature control plate (31), and the third end is communicated with the bottom-mounted temperature control plate; the first end of the liquid outlet joint (42) is communicated with the liquid return pipe (46), the second end is communicated with the second side-mounted temperature control plate (32), and the third end is communicated with the bottom-mounted temperature control plate.

8. A battery pack temperature control system as defined in claim 2, wherein: The temperature control assembly (3) further comprises a temperature measuring plate (33) arranged on the outer periphery of the battery module (2), and the temperature measuring plate (33) is used to detect the temperature of the battery module (2).

9. A battery pack temperature control system as defined in claim 6, wherein: The battery module (2) comprises a first cell group (21) and a second cell group (22) arranged in parallel and at intervals, the first side-mounted temperature control plate (31) is two plates arranged on the same side of the first cell group (21) and the second cell group (22) respectively, and the second side-mounted temperature control plate (32) is also two plates arranged on the same side of the first cell group (21) and the second cell group (22) respectively.

10. A battery pack temperature control system as defined in claim 9, wherein: The temperature control assembly (3) further comprises a first heat preservation cotton (34) arranged between the inner wall of the accommodating cavity (11) and the first side-mounted temperature control plate (31), the second side-mounted temperature control plate (32), and the bottom-mounted temperature control plate, and a second heat preservation cotton (35) arranged between the first side-mounted temperature control plate (31) and the second side-mounted temperature control plate (32).

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