Liquid-cooled battery pack structure

Abstract

The utility model relates to the technical field of batteries, in particular to a liquid-cooled battery pack structure which comprises a liquid-cooled plate, an upper cover is mounted at the upper end of the liquid-cooled plate, two battery modules are further mounted at the upper end of the liquid-cooled plate, the battery modules are symmetrically distributed, and each battery module consists of a plurality of single battery cells. The temperature of the battery pack can be monitored and adjusted in real time through the temperature sensor and the control system, it is ensured that the battery pack is within the optimal working temperature range, the charging and discharging efficiency and safety of the battery are improved, and the battery pack is safe and reliable. And a reliable sealing structure and protection measures are adopted, so that the influence of the external environment on the battery pack can be effectively prevented, and the safe operation of the battery pack in various severe environments is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a liquid cooling battery pack structure. BACKGROUND

[0002] With the continuous development of new energy technology, the lithium battery of large rate charge and discharge is widely applied in electric vehicles, special energy storage systems and other fields.

[0003] However, the lithium battery of large rate charge and discharge generates a large amount of heat in the process of charge and discharge, and if the heat cannot be dissipated in time and effectively, the performance, service life and safety of the battery will be affected; the traditional air cooling heat dissipation mode has problems such as low heat dissipation efficiency and uneven temperature, and it is difficult to meet the heat dissipation demand of high power density batteries; therefore, it is of important practical significance to develop an efficient liquid cooling battery pack structure.

[0004] Therefore, under the above-mentioned viewpoints, the existing battery pack structure still has room for improvement. INVENTION CONTENTS

[0005] In order to solve the above problems, the utility model provides a liquid cooling battery pack structure, which comprises a liquid cooling plate, characterized in that: the upper end of the liquid cooling plate is provided with an upper cover, and the upper end of the liquid cooling plate is also provided with two groups of battery modules, and the battery modules are symmetrically distributed.

[0006] Each group of battery modules is composed of a plurality of single battery cells, and the upper end of each group of single battery cells is jointly provided with a series connection template for series connection, and the two sides of the series connection template are provided with connecting plates.

[0007] Preferably, the liquid cooling plate is internally provided with a cooling channel, and the cooling channel is filled with a cooling liquid.

[0008] Preferably, the outermost side of each group of single battery cells is jointly provided with a module steel belt and a module plastic steel belt, and a module end plate is symmetrically arranged between the module steel belt and the module plastic steel belt, and the upper end of the liquid cooling plate is symmetrically provided with a mounting beam, and the module end plate and the corresponding mounting beam are connected by bolt fixing.

[0009] Preferably, the bottom of the battery module is connected to the outer side of the liquid cooling plate through heat-conducting glue.

[0010] Preferably, the liquid cooling plate is provided with a water inlet connecting pipe and a water outlet connecting pipe on one side, and the water inlet connecting pipe and the water outlet connecting pipe are connected to the cooling channel on the side of the liquid cooling plate, and the water inlet connecting pipe and the water outlet connecting pipe are connected to the water inlet and outlet of the external cooling pump equipment.

[0011] Preferably, a temperature sensor is installed in each battery module, and the temperature sensor is used to detect the temperature inside the battery module, and the pump water volume of the external cooling pump equipment is adjusted according to the temperature inside the battery module.

[0012] Preferably, a display panel is installed on the upper part of the cover, and the display panel is electrically connected to the temperature sensor and the battery module.

[0013] Preferably, a sealing strip is provided at the mounting point of the liquid cooling plate and the top cover, and a sealing strip is also provided at the connection point between the top cover and the display panel.

[0014] Preferably, a support frame is also provided on one side of the liquid cooling plate, and an ultraviolet detection module is provided on the upper end of the support frame. The ultraviolet detection module is electrically connected to the display panel and is used to collect fire monitoring information in the liquid-cooled battery pack.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] I. The liquid-cooled battery pack structure of this utility model adopts a liquid cooling method, which can quickly and effectively remove the heat generated by the battery, keep the battery working within a suitable temperature range, and improve the battery performance and life.

[0017] Second, this utility model achieves uniform temperature distribution by having the liquid cooling plate in close contact with the battery module, reducing local hot spots, and improving battery consistency and reliability. The liquid cooling system can be designed to be compact and closely integrated with the battery module structure, without occupying too much space, and is suitable for a variety of application scenarios.

[0018] Third, this utility model can monitor and adjust the temperature of the battery pack in real time through a temperature sensor and control system, ensuring that it is within the optimal operating temperature range, thereby improving the charging and discharging efficiency and safety of the battery. The reliable sealing structure and protective measures can effectively prevent the influence of the external environment on the battery pack and ensure the safe operation of the battery pack in various harsh environments. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0021] Figure 2 This is a structural schematic diagram of the battery module of this utility model.

[0022] Figure 3 This is a schematic diagram of the cooling channel structure of this utility model.

[0023] Figure 4 This is a utility model Figure 2 Enlarged view of part of the structure at point A in the middle.

[0024] Figure 5 This is a structural schematic diagram of the installation beam of this utility model.

[0025] Figure 6 Figure is the structure diagram of the ultraviolet detection module.

[0026] In the figure, 1, liquid cooling plate; 10, upper cover; 11, battery module; 2, series template; 20, connecting plate; 3, cooling channel; 4, module steel belt; 40, module plastic steel belt; 41, module end plate; 42, installation cross beam; 5, water inlet connecting pipe; 50, water outlet connecting pipe; 6, display panel; 7, ultraviolet detection module. DETAILED DESCRIPTION

[0027] The following will be combined Figures 1 to 6 The embodiments of the utility model are described in detail.

[0028] The application embodiment discloses a kind of liquid-cooled battery pack structures, it is described, the liquid-cooled battery pack structure of the present application is mainly applied in the process of water-cooling heat dissipation to single cell, on technical effect, can be contacted by being provided with a whole piece of liquid cooling plate with single single-core lower end, so that the heat generated by cell can be transferred to liquid cooling plate, cooling liquid in liquid cooling plate absorbs heat, then under the drive of external water pump, flow in liquid cooling plate, heat is transferred from liquid cooling plate, further, by the application of temperature sensor, the water pump capacity of external water pump can be adjusted in real time by the heat in battery module, so that cooling liquid can fully transfer the heat on liquid cooling plate.

[0029] Embodiment one: refer to Figure 1 And Figure 2 As shown, including liquid cooling plate 1, characterized in that: the liquid cooling plate 1 upper end is equipped with upper cover 10, liquid cooling plate 1 upper end is also equipped with two groups of battery module 11, and battery module 11 is symmetrically distributed, liquid cooling plate 1 is used for supporting battery module 11, and upper cover 10 and liquid cooling plate 1 are mutually matched to protect battery module 11, prevent battery module 11 from colliding with external environment and causing damage, and upper cover 10 adopts 5052 aluminum alloy material, surface adopts spray plastic process, to facilitate reducing the weight of the whole battery pack, and improve heat dissipation effect;

[0030] Continue to refer to Figure 2 As shown, specifically, each group of battery module 11 is composed of several single cells, and the upper end of each group of single cells is equipped with series template 2 for series connection, and the two sides of series template 2 are provided with connecting plate 20, and connecting plate 20 is used for connecting with external conductive equipment, so that two battery modules can output power to the outside.

[0031] Refer to Figure 3As shown, specifically, the liquid cooling plate 1 is internally provided with a cooling channel 3, the cooling channel 3 is filled with cooling liquid, the liquid cooling plate 1 is made of 3003 aluminum alloy material, the front surface treatment adopts a spraying process, which simultaneously plays an insulating and anti-oxidation role, the back surface adopts polyurethane foaming treatment, which plays a protective and heat preservation role, and the cooling channel 3 inside is designed in a parallel wide flow channel form to reduce flow resistance and improve heat dissipation effect, so when the liquid cooling plate 1 receives heat on one side, the cooling liquid flows in the cooling channel 3 to absorb heat, and the cooling liquid is an aqueous solution of ethylene glycol, which has good heat conductivity, insulation and chemical stability, and low cost.

[0032] Continuing to refer to Figure 2 , Figure 4 and Figure 5 , specifically, the outermost side of each group of single battery cells is collectively sleeved with a module steel belt 4 and a module plastic steel belt 40, and the module belt 4 and the module plastic steel belt 40 are symmetrically provided between the module end plate 41, the upper end of the liquid cooling plate 1 is symmetrically provided with a mounting cross beam 42, and the module end plate 41 and the corresponding mounting cross beam 42 are connected by bolt fixing, the module steel belt 4 has high mechanical strength and can provide strong supporting force to ensure the stability of the battery cells in the module, prevent the battery cells from shifting or loosening during transportation and use, the module plastic steel belt 40 has good flexibility and impact resistance, which can effectively fix the position of the battery cells and protect the battery cells from deformation due to external impact, and the two sides collectively limit multiple single battery cells together, the module end plate 41 is used to connect the corresponding module steel belt 4 and module plastic steel belt 40 together for further reinforcement, and is connected by bolt fixing with the mounting cross beam 42 to ensure that the battery module 11 can be stably fixed on the liquid cooling plate 1, and ensure that the battery module 11 will not be separated from the liquid cooling plate 1 during use.

[0033] When installing, the single battery cells are limited by the module steel belt 4 and the module plastic steel belt 40, and are connected in series into a battery module 11 according to the design requirements of the series connection template 2, to ensure reliable connection between the single battery cells and avoid short circuit and open circuit problems.

[0034] When installing, the battery module 11 is first placed on the upper end of the liquid cooling plate 1, then the battery module 11 is brought into close contact with the liquid cooling plate 1 through the heat-conducting glue, and finally the module end plate 41 is fixed on the corresponding mounting cross beam 42 by bolt fixing to complete the installation of the battery module 11.

[0035] The bottom of the battery module 11 is connected with the outer side of the liquid cooling plate 1 through the heat-conducting glue, so that the heat generated by the battery module 11 can be more efficiently conducted to the liquid cooling plate 1, and then the cooling liquid in the liquid cooling plate 1 can conduct the heat.

[0036] With reference to the foregoing Figure 5 As shown, specifically, the liquid cooling plate 1 is provided with an inlet pipe 5 and an outlet pipe 50 on one side, and the inlet pipe 5 and the outlet pipe 50 are connected to the cooling channel 3 on one side of the liquid cooling plate 1. The inlet pipe 5 and the outlet pipe 50 are used to connect to the inlet and outlet of the external cooling pump device. The external cooling pump device can pump the cooling liquid into the inlet pipe 5, so that the cooling liquid can flow into the cooling channel 3 through the inlet pipe 5, absorb heat on one side of the liquid cooling plate 1, and then flow to the outlet pipe 50 and re-enter the external cooling pump through the outlet pipe 50. The external cooling pump is also provided with a radiator, which can dissipate the heat carried by the cooling liquid. After the heat in the cooling liquid is dissipated, the cooling liquid can be pumped into the inlet pipe 5 again to circulate.

[0037] Each battery module 11 is provided with a temperature sensor for detecting the temperature inside the battery module 11, and the pump water volume of the external cooling pump device is adjusted according to the temperature inside the battery module 11.

[0038] With reference to the foregoing Figure 1 As shown, specifically, the upper cover 10 is provided with a display panel 6 at the upper end, and the display panel 6 is electrically connected to the temperature sensor and the battery module 11. The remaining capacity and the internal temperature of the battery module 11 can be displayed on the display panel 6, which is convenient for personnel to check.

[0039] The installation position of the liquid cooling plate 1 and the upper cover 10 is provided with a sealing strip, and the connection position of the upper cover 10 and the display panel 6 is also provided with a sealing strip. The sealing strip is used to fill the gap between the liquid cooling plate 1 and the upper cover 10 and the gap between the upper cover 10 and the display panel 6. The sealing of the sealing strip can reach the IP67 protection level, which ensures that the battery module 11 can safely operate in a relatively harsh environment.

[0040] With reference to the foregoing Figure 6 As shown, specifically, the liquid cooling plate 1 is provided with a support frame on one side, and the support frame is provided with an ultraviolet detection module 7 at the upper end. The ultraviolet detection module 7 is electrically connected to the display panel 6 and is used to collect fire monitoring information in the liquid cooling battery pack.

[0041] In actual use, the battery module 11 may produce corona, electric spark or combustion. The ultraviolet detection module 7 arranged in the liquid cooling battery pack can immediately monitor the above-mentioned fire information to determine whether a thermal runaway phenomenon occurs. At the same time, the corresponding information is displayed on the display panel 6, so that the staff can intervene in time. If thermal runaway occurs, the control and suppression device will push the fire extinguishing gas into the battery pack to achieve the effect of cooling, temperature reduction, oxygen isolation and chemical inhibition, and effectively suppress the fire in the early stage.

[0042] Working time: the first step, through the module steel belt 4 and the module plastic steel belt 40 combine several single battery cell into battery module 11, then install battery module 11 on liquid cooling plate 1 through the cooperation of module end plate 41 and installation crossbeam 42.

[0043] Second step: then install upper cover 10 on liquid cooling plate 1.

[0044] Third step: through the connection of external cold pump equipment and water inlet connecting pipe 5 and water outlet connecting pipe 50, external cold pump equipment drives cooling liquid to flow in liquid cooling plate 1 through temperature sensor, so that cooling liquid can transfer the heat on one side of liquid cooling plate 1 to outside of liquid cooling plate 1.

[0045] Fourth step: display the data detected by temperature sensor and ultraviolet detection module 7 through display panel 6, so that personnel can know specific information.

[0046] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting.

[0047] In addition, it should be understood that, although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A liquid-cooled battery pack structure, comprising a liquid cooling plate (1), characterized in that: The liquid cooling plate (1) is equipped with a top cover (10) and two sets of battery modules (11) are also installed on the top of the liquid cooling plate (1), and the battery modules (11) are symmetrically distributed. Each battery module (11) consists of several individual cells, and each group of individual cells is connected in series with a series template (2) installed on the upper end. Both sides of the series template (2) are provided with connecting plates (20).

2. The liquid-cooled battery pack structure according to claim 1, characterized in that: The liquid cooling plate (1) has a cooling channel (3) inside, and the cooling channel (3) is filled with coolant.

3. The liquid-cooled battery pack structure according to claim 1, characterized in that: The outermost side of each group of individual cells is fitted with a module steel strip (4) and a module plastic steel strip (40), and module end plates (41) are symmetrically arranged between the module steel strip (4) and the module plastic steel strip (40). Mounting beams (42) are symmetrically arranged on the upper end of the liquid cooling plate (1), and the module end plates (41) and the corresponding mounting beams (42) are connected by bolts.

4. The liquid-cooled battery pack structure according to claim 1, characterized in that: The bottom of the battery module (11) is connected to the outside of the liquid cooling plate (1) by thermally conductive adhesive.

5. The liquid-cooled battery pack structure according to claim 2, characterized in that: The liquid cooling plate (1) is provided with an inlet pipe (5) and an outlet pipe (50) on one side, and the inlet pipe (5) and the outlet pipe (50) are located on one side of the liquid cooling plate (1) and are connected to the cooling channel (3). The inlet pipe (5) and the outlet pipe (50) are used to connect to the inlet and outlet of the external cold pump equipment respectively.

6. The liquid-cooled battery pack structure according to claim 1, characterized in that: Each of the battery modules (11) is equipped with a temperature sensor, which is used to detect the temperature inside the battery module (11) and adjust the pumping volume of the external cold pump based on the temperature inside the battery module (11).

7. A liquid-cooled battery pack structure according to claim 6, characterized in that: The upper end of the cover (10) is equipped with a display panel (6), which is electrically connected to the temperature sensor and the battery module (11).

8. The liquid-cooled battery pack structure according to claim 7, characterized in that: A sealing strip is provided at the mounting point of the liquid cooling plate (1) and the upper cover (10), and a sealing strip is also provided at the connection point between the upper cover (10) and the display panel (6).

9. A liquid-cooled battery pack structure according to claim 8, characterized in that: A support frame is also provided on one side of the liquid cooling plate (1), and an ultraviolet detection module (7) is provided on the upper end of the support frame. The ultraviolet detection module (7) is electrically connected to the display panel (6) and is used to collect fire monitoring information in the liquid cooling battery pack.

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