CN215771256U

CN215771256U - Battery device

Info

Publication number: CN215771256U
Application number: CN202121164907.3U
Authority: CN
Inventors: 梁碧辉; 许勇枝; 曾奕彰; 易龙强; 陈四雄
Original assignee: Zhangzhou Kehua Technology Co Ltd; Kehua Data Co Ltd
Current assignee: Zhangzhou Kehua Technology Co Ltd; Kehua Data Co Ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-02-08
Anticipated expiration: 2031-05-27

Abstract

The utility model discloses a battery device, which comprises a shell, a battery module, a DC/DC converter and an electric connector, wherein the shell is provided with a plurality of battery modules; the battery module comprises a plurality of battery modules which are connected in series; the DC/DC converter is arranged in the shell and corresponds to the battery module, and the first side of the DC/DC converter is electrically connected with the battery module; the electric connector is fixedly connected with the shell and electrically connected with the second side of the DC/DC converter, and forms an external connecting end of the battery device. The battery device can still keep a certain output voltage through the DC/DC converter to meet the requirement of a power supply system under the condition that the battery module outputs lower voltage, thereby being suitable for reducing the output voltage of the battery module to improve the safety of personnel, providing a better material basis for the capacity expansion requirement of the corresponding power supply system, and having a certain modularization degree, thereby having better management convenience.

Description

Battery device

Technical Field

The utility model relates to the technical field of batteries and battery power supply, in particular to a battery device.

Background

Currently, the UPS is widely adopted. In the event of a mains power anomaly, the UPS typically switches to a battery-powered state to ensure uninterrupted power supply to the load. As the load level increases, the output power of the UPS also needs to increase, which requires that the output power of the battery pack is also matched in the battery-powered state.

In the conventional UPS, the battery assembly is generally composed of a plurality of battery packs, and when capacity expansion is required, the battery assembly is generally implemented by connecting more battery packs in series or by using a battery pack with more single batteries. However, the voltage gain of the DC/DC converter inside the UPS is not large, so that more batteries need to be connected in series during capacity expansion, which results in higher output voltage of the battery pack, and this has a certain influence on the safety of personnel operating and maintaining the battery pack. Moreover, the existing battery pack products are not mature enough in the aspects of personnel protection, modularization degree and the like, and are not suitable for uniformly managing and maintaining each battery pack, so that the personnel safety of the battery pack is further influenced, and the management difficulty of the battery pack is also improved.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome at least one of the drawbacks or problems of the related art, and to provide a battery device, so that a power supply system using the battery device is convenient for capacity expansion, and has better personnel safety and management convenience.

In order to achieve the purpose, the technical scheme of the utility model is as follows: a battery device, comprising: a housing; the battery module is arranged in the shell and comprises a plurality of battery modules which are connected in series; a DC/DC converter provided in the case and corresponding to the battery module; the first side of the DC/DC converter is electrically connected with the battery module; and the electric connector is fixedly connected with the shell and electrically connected with the second side of the DC/DC converter and forms an external connection end of the battery device.

Further, the maximum output voltage of the battery module is lower than 65V; each battery module comprises a plurality of battery cell units which are connected in series, and each battery cell unit consists of two single lithium batteries which are connected in parallel.

Further, the DC/DC converter is a bidirectional DC/DC converter, and the first side and the second side thereof are a low-voltage side and a high-voltage side, respectively.

Furthermore, the electric connector is a pluggable high-power quick-connection plug.

Further, the battery module comprises N battery modules, wherein N is a natural number greater than 0; an accommodating cavity is formed in the shell, and N partition plates are arranged in the accommodating cavity at intervals along the left-right direction so as to define N +1 sub-accommodating cavities at intervals along the left-right direction; each sub-accommodating cavity is used for accommodating the DC/DC converter or one battery module, so that the DC/DC converter and the N battery modules are respectively accommodated in the N +1 sub-accommodating cavities.

Further, the housing includes a front panel; the front panel is provided with the electric connector, and the electric connector and a sub-containing cavity for containing the battery module are oppositely arranged along the front and back directions.

Further, the housing includes a front panel and a rear panel; a first heat dissipation area and a second heat dissipation area are respectively defined on the front panel and the rear panel, and the first heat dissipation area and the second heat dissipation area are respectively composed of a plurality of heat dissipation holes; the first heat dissipation area and the sub-accommodation cavity for accommodating the DC/DC converter are oppositely arranged along the front-back direction, and the second heat dissipation area and the first heat dissipation area are oppositely arranged along the front-back direction, so that the sub-accommodation cavity for accommodating the DC/DC converter forms a heat dissipation air duct of the DC/DC converter; wherein a projection of the first heat dissipation area in the front-rear direction covers a projection of the DC/DC converter in the front-rear direction, and a projection of the second heat dissipation area in the front-rear direction covers a projection of the first heat dissipation area in the front-rear direction.

Further, the housing includes a front panel; the battery device also comprises a communication interface arranged on the front panel, and the communication interface is used for establishing communication relation with other battery devices.

Furthermore, the casing includes the front panel, two handles have still been set firmly to the front panel.

Further, the battery device comprises a plurality of battery modules and a plurality of DC/DC converters which correspond to each other, and each battery module and each DC/DC converter are arranged in the shell; the first side of each DC/DC converter is electrically connected with a corresponding battery module, and the second side of each DC/DC converter is connected in parallel with a common end; the electrical connector electrically connects the common terminal.

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

(1) the battery device comprises a DC/DC converter, and the DC/DC converter is coupled with the battery module to convert and output the output voltage of the battery module, so that the capacity expansion of a power supply system applying the battery device is not required to be realized by greatly improving the output voltage of the battery module. In other words, under the condition that the battery module outputs lower voltage, the battery device can still keep certain output voltage during working so as to meet the requirement of a power supply system; when maintenance is needed, the battery module can be maintained safely due to the fact that the output voltage of the battery module is not high. Therefore, the structure effectively improves the personnel safety of the battery device during maintenance and operation, and provides a better material basis for the capacity expansion requirement of the corresponding power supply system.

In addition, because the battery device is provided with the shell, the battery module and the DC/DC converter are arranged in the shell, and the electric connector is fixedly connected with the shell and is suitable for a user to carry out electric connection operation through the electric connector, the battery device is conveniently subjected to modular configuration so as to be further stacked or accommodated in the modular cabinet body to form the modular battery cabinet, and the management convenience of the battery device is improved.

(2) The maximum output voltage of the battery module is lower than 65V, and the safety of personnel maintenance is guaranteed. The battery cell unit is composed of two single batteries which are connected in parallel, so that the current level of the battery cell unit which can be loaded is improved, and the discharge performance of the battery device is improved. The single batteries in the battery cell unit are all lithium batteries, so that the service life is long and the discharge is stable.

(3) The DC/DC converter is a bidirectional DC/DC converter, so that the battery device can be used in an energy storage and power supply scenario.

(4) The electric connector is a pluggable high-power quick-connection plug, can bear high power and is quick and convenient to connect.

(5) The accommodating cavity is divided into a plurality of sub-accommodating cavities by arranging the partition plate in the shell, and each battery module and each DC/DC converter are respectively arranged in one sub-accommodating cavity, so that each part is electrically isolated conveniently, and the safety requirement is met.

(6) The electric connector and the communication interface are arranged on the front panel, and wiring is facilitated. The front panel is also provided with a handle, so that the battery device can be conveniently operated by personnel during maintenance.

(7) The front panel and the rear panel respectively define a first heat dissipation area and a second heat dissipation area, the two heat dissipation areas are formed by a plurality of heat dissipation holes, and the first heat dissipation area, the second heat dissipation area and the DC/DC converter are oppositely arranged along the front-back direction, so that a sub containing cavity for containing the DC/DC converter forms a heat dissipation air duct of the DC/DC converter, and the cooling requirement of the DC/DC converter is met;

in addition, according to the concrete arrangement of outside fan, the air inlet and outlet direction in heat dissipation wind channel also can carry out the adaptability and change, extensive applicability.

(8) The battery device comprises a plurality of battery modules and DC/DC converters which correspond to each other, wherein the second side of each DC/DC converter is connected in parallel with a common end, and the common end is electrically connected with the electric connector, so that the battery modules are connected in parallel and output. Therefore, even if the number of the battery cell units in each battery module is small, the discharging performance of the battery device can be effectively improved, and the uninterrupted power supply is particularly favorable for the application of the uninterrupted power supply of a power supply system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a topology diagram of a battery device according to embodiment 1 of the present invention;

fig. 2 is a perspective view of a battery device according to embodiment 1 of the present invention;

fig. 3 is a perspective view of the battery device according to embodiment 1 of the present invention after the upper panel is hidden;

fig. 4 is a perspective view of a battery device according to embodiment 2 of the present invention with an upper panel hidden;

fig. 5 is a perspective view of a battery device according to embodiment 3 of the present invention with an upper panel hidden;

FIG. 6 is a topology diagram of a battery device according to embodiment 4 of the present invention;

fig. 7 is a topology diagram of a battery device connected to an inverter according to embodiment 4 of the present invention.

Description of reference numerals:

a battery device 10; a housing 11; a front panel 111; a first heat dissipation area 111A; a rear panel 112; a second heat dissipation area 112A; a partition 113; a battery module 12; a battery module 121; a DC/DC converter (first DC/DC converter) 13; an electrical connector (external connection terminal, first electrical connector) 14; a communication interface 15;

a deflector 20; a battery terminal (second electrical connector) 21; an AC/DC converter 22; a DC/AC converter 23; a second DC/DC converter 24; an electronic bypass switch 25.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are presently preferred embodiments of the utility model and are not to be taken as an exclusion of other embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.

In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.

In the claims, the description and the drawings of the present invention, unless otherwise specifically limited, the term "electrically connected", as used herein, may include direct electrical connection as well as indirect electrical connection; the term "coupled", as used herein, means that the two electrical parts have a particular circuit function when electrically connected.

Referring to fig. 1 to 3, embodiment 1 of the present invention provides a battery device 10 including a case 11, a battery module 12, a DC/DC converter 13, and an electrical connector 14.

The housing 11 is formed by a plurality of plates and has a cubic structure, and an accommodating cavity is defined in the housing. In other embodiments, the housing 11 may have other geometric configurations. In this embodiment, the housing 11 includes a front panel 111, a rear panel 112, a left panel, a right panel, an upper panel and a lower panel, which are fixedly connected to each other, the six panels are enclosed to define the accommodating cavity, and the upper panel is detachably and fixedly connected to the other panels, so as to maintain the battery device. In the specific structure, the front panel is provided with a wiring opening.

The battery module 12 is disposed in the accommodating cavity of the housing 11, and includes a plurality of battery modules 121 connected in series, and each battery module 121 is electrically connected to another battery module through a conductive wire. Specifically, the battery module 121 includes a plurality of battery cell units connected in series, and each battery cell unit is composed of two single lithium batteries connected in parallel, so that the current level of the battery cell unit can be increased, and the discharge performance of the battery device is improved. In other embodiments, the cell unit may also be directly formed by a single battery. In this embodiment, the maximum output voltage of the battery module 12 is lower than 65V, preferably 51.2V, so as to ensure the safety of personnel maintenance.

The DC/DC converter 13 is disposed in the accommodating cavity of the housing 11, and a first side of the DC/DC converter is electrically connected to the battery module 12 to convert at least the output voltage of the battery module 12. In this embodiment, the DC/DC converter 13 is a bidirectional DC/DC converter, and the first side and the second side of the bidirectional DC/DC converter are respectively a low-voltage side and a high-voltage side, so that bidirectional voltage conversion can be performed, and the battery device is suitable for an energy storage and power supply scenario. It is worth noting that the DC/DC converter 13 may be an existing converter and is not limited to a specific DC/DC circuit topology, and may include a plurality of controllable switches, and thus, a controller for controlling the on/off of the controllable switches.

The electrical connector 14 is fixed to the housing 11 and electrically connected to the second side of the DC/DC converter 13, and constitutes an external connection terminal 14 of the battery device to establish an electrical connection relationship with an external electrical device. In this embodiment, the electrical connector 14 is a pluggable high-power quick-connection plug, which can bear high power and is fast and convenient in connection. Specifically, the electrical connector 14 is embedded in the front panel 111, one end of the electrical connector is located in the accommodating cavity and electrically connected to the DC/DC converter 13, and the other end of the electrical connector is exposed to the housing 11 through a wiring opening formed in the front panel 111, so that a user can electrically connect the battery device 10 to an external electrical device through the electrical connector 14.

It can be seen that the battery device 10 of the present embodiment includes the DC/DC converter 13, and the DC/DC converter 13 is coupled to the battery module 12 to convert the output voltage of the battery module 12 and output the converted voltage by the electrical connector 14, so that there is no need to greatly increase the output voltage of the battery module 12 to expand the capacity of the power supply system to which the battery device 10 is applied. In other words, when the battery module 12 outputs a relatively low voltage, the battery device 10 can still maintain a certain output voltage during operation to meet the requirements of the power supply system; when maintenance is required, since the output voltage of the battery module 12 is not high, maintenance operation of the battery module 12 can be performed relatively safely. Therefore, the structure effectively improves the personnel safety of the battery device 10 during maintenance and operation, and provides a better material basis for the capacity expansion requirement of the corresponding power supply system. In addition, since the battery device 10 has the housing 11, the battery module 12 and the DC/DC converter 13 are installed in the housing 11, and the electrical connector 14 is fixedly connected to the housing 11 and is suitable for a user to perform an electrical connection operation through the electrical connector 14, the battery device 10 is conveniently configured in a modular manner to be further stacked or accommodated in a modular cabinet body to form a modular battery cabinet, so that the management convenience of the battery device 10 is improved.

Specifically, the battery module 12 includes N battery modules 121, where N is a natural number greater than 0. An accommodating cavity is formed in the housing 11, and N partition plates 113 are arranged in the accommodating cavity at intervals along the left-right direction to define N +1 sub-accommodating cavities at intervals along the left-right direction. Each sub-accommodating cavity is used for accommodating the DC/DC converter 13 or one battery module 121, so that the DC/DC converter 13 and the N battery modules 121 are respectively accommodated in the N +1 sub-accommodating cavities, thereby electrically isolating each component and meeting the safety requirements.

Referring to fig. 3, in the present embodiment, the number of the battery modules 121 is two, and the number of the separators 113 is two, so that 3 sub-receiving cavities are formed in the housing 11. The DC/DC converter 13 is disposed in the left sub-accommodation cavity, one battery module 121 is disposed in the middle sub-accommodation cavity, and the other battery module 121 is disposed in the right sub-accommodation cavity.

Further, the electrical connector 14 and a sub-receiving cavity for receiving the battery module 121 are disposed opposite to each other along the front-rear direction. The battery device 10 further includes a communication interface 15 for establishing a communication relationship with other battery devices. In this embodiment, the communication interface 15 is also provided on the front panel 111. In addition, a handle is further fixedly arranged on the front panel 111, so that the operation of personnel is facilitated.

In a specific structure, the front panel 111 and the rear panel 112 respectively define a first heat dissipation area 111A and a second heat dissipation area 112A, and each of the first heat dissipation area 111A and the second heat dissipation area 112A is formed by a plurality of honeycomb-shaped heat dissipation holes.

The first heat dissipation area 111A and the sub-accommodation cavity for accommodating the DC/DC converter 13 are oppositely arranged along the front-rear direction, and the second heat dissipation area 112A and the first heat dissipation area 111A are oppositely arranged along the front-rear direction, so that the sub-accommodation cavity for accommodating the DC/DC converter 13 forms a heat dissipation air duct of the DC/DC converter 13, and the cooling requirement of the DC/DC converter 13 is met. Preferably, a projection of the first heat dissipation area 111A in the front-rear direction covers a projection of the DC/DC converter 13 in the front-rear direction, and a projection of the second heat dissipation area 112A in the front-rear direction covers a projection of the first heat dissipation area 111A in the front-rear direction. In addition, according to the concrete arrangement of outside fan, the air inlet and outlet direction in heat dissipation wind channel also can carry out the adaptability and change, extensive applicability.

Referring next to fig. 4-5, which respectively illustrate the battery devices of embodiments 2 and 3 of the present invention, it can be seen from fig. 3 that the main differences of embodiments 2-3 are that the specific positions of the battery module 121 and the DC/DC converter 13 are changed, and the first heat dissipation area 111A and the electrical connector 14 are also changed accordingly, and the functional principle and structure thereof are the same as those of embodiment 1, and thus are not described again.

Referring to fig. 6, embodiment 4 of the present invention further provides a battery device 10, which includes a plurality of battery modules 12 and a DC/DC converter 13, which are disposed in a housing and correspond to each other. In this embodiment, the structures of the battery module 12 and the DC/DC converter 13 corresponding to each other, the positional relationship with the housing, and the electrical connection relationship therebetween can be referred to in embodiment 1, and repeated descriptions of this embodiment will not be repeated. On this basis, in the present embodiment, the first side of each DC/DC converter 13 is electrically connected to the corresponding battery module 12, and the second side of each DC/DC converter 13 is connected in parallel to a common terminal. The electrical connector 14 electrically connects the common terminals. In other words, the battery device 10 includes a plurality of battery modules 12 and DC/DC converters 13 corresponding to each other, and the second side of each DC/DC converter 13 is connected in parallel to a common terminal electrically connected to the electrical connector 14, so that the battery modules 12 are output in parallel. Thus, even if the number of the cell units in each battery module 12 is small, the discharge performance of the battery device 10 can be effectively improved, and the uninterruptible power supply is particularly beneficial to the application of an uninterruptible power supply of a power supply system.

Referring to fig. 7, an operation scenario and a process of the battery device in an uninterruptible power supply application will be described based on the battery device provided in embodiment 4. Here, the DC/DC converter 13 of the battery device 10 is defined as a first DC/DC converter 13, and the electrical connector 14 of the battery device 10 is defined as a first electrical connector 14.

As can be seen in fig. 7, the battery device 10 is electrically connected to a variable current device 20 via the external connection 14. In this embodiment, the inverter device 20 has a UPS function, and includes a battery terminal 21, an AC/DC converter 22, a DC/AC converter 23, a DC bus, a second DC/DC converter 24, and an electronic bypass switch 25.

The battery terminal 21 is configured as a second electrical connector 21 adapted to mate with and establish an electrical connection with the first electrical connector 14 of the battery device 10, for example, the second electrical connector 21 may also be a high power quick connect plug. The DC sides of the AC/DC converter 22 and the DC/AC converter 23 are both electrically connected to the DC bus, the AC side of the AC/DC converter 22 is connected to an AC power source (such as a utility power source or a diesel generator), and the AC side of the DC/AC converter 23 outputs an AC power and is electrically connected to an AC load. The low-voltage side and the high-voltage side of the second DC/DC converter 24 are electrically connected to the battery terminal 21 and the DC bus, respectively, so as to realize voltage conversion between the battery terminal 21 and the DC bus. Two ends of the electronic bypass switch 25 are electrically connected to the AC side of the AC/DC converter 22 and the AC side of the DC/AC converter 23, respectively, to bypass the DC/AC converter 23 when necessary.

When the converter device 20 is in a battery-powered state, the output voltage of the battery module 12 of the battery device 10 is 51.2V, the voltage is converted by the first DC/DC converters 13 and then output as 200V, and the second DC/DC converter 24 converts the 200V voltage received at the battery end 21 and outputs as 400V to the DC bus to implement voltage matching.

The description of the above specification and examples is intended to be illustrative of the scope of the present invention and is not intended to be limiting. Modifications, equivalents and other improvements which may occur to those skilled in the art and which may be made to the embodiments of the utility model or portions thereof through a reasonable analysis, inference or limited experimentation, in light of the common general knowledge, the common general knowledge in the art and/or the prior art, are intended to be within the scope of the utility model.

Claims

1. A battery device, comprising:

a housing;

the battery module is arranged in the shell and comprises a plurality of battery modules which are connected in series;

a DC/DC converter provided in the case and corresponding to the battery module; the first side of the DC/DC converter is electrically connected with the battery module;

and the electric connector is fixedly connected with the shell and electrically connected with the second side of the DC/DC converter and forms an external connection end of the battery device.

2. The battery device of claim 1, wherein: the maximum output voltage of the battery module is lower than 65V; each battery module comprises a plurality of battery cell units which are connected in series, and each battery cell unit consists of two single lithium batteries which are connected in parallel.

3. The battery device of claim 1, wherein: the DC/DC converter is a bidirectional DC/DC converter, and the first side and the second side of the bidirectional DC/DC converter are respectively a low-voltage side and a high-voltage side.

4. The battery device of claim 1, wherein: the electric connector is a pluggable high-power quick-connection plug.

5. The battery device of any one of claims 1-4, wherein: the battery module comprises N battery modules, wherein N is a natural number greater than 0;

an accommodating cavity is formed in the shell, and N partition plates are arranged in the accommodating cavity at intervals along the left-right direction so as to define N +1 sub-accommodating cavities at intervals along the left-right direction; each sub-accommodating cavity is used for accommodating the DC/DC converter or one battery module, so that the DC/DC converter and the N battery modules are respectively accommodated in the N +1 sub-accommodating cavities.

6. The battery device of claim 5, wherein: the housing includes a front panel;

the front panel is provided with the electric connector, and the electric connector and a sub-containing cavity for containing the battery module are oppositely arranged along the front and back directions.

7. The battery device of claim 5, wherein: the housing comprises a front panel and a rear panel;

a first heat dissipation area and a second heat dissipation area are respectively defined on the front panel and the rear panel, and the first heat dissipation area and the second heat dissipation area are respectively composed of a plurality of heat dissipation holes;

the first heat dissipation area and the sub-accommodation cavity for accommodating the DC/DC converter are oppositely arranged along the front-back direction, and the second heat dissipation area and the first heat dissipation area are oppositely arranged along the front-back direction, so that the sub-accommodation cavity for accommodating the DC/DC converter forms a heat dissipation air duct of the DC/DC converter;

wherein a projection of the first heat dissipation area in the front-rear direction covers a projection of the DC/DC converter in the front-rear direction, and a projection of the second heat dissipation area in the front-rear direction covers a projection of the first heat dissipation area in the front-rear direction.

8. The battery device of claim 5, wherein: the housing includes a front panel;

the battery device also comprises a communication interface arranged on the front panel, and the communication interface is used for establishing communication relation with other battery devices.

9. The battery device of claim 5, wherein: the casing includes the front panel, two handles have still been set firmly to the front panel.

10. The battery device of any one of claims 1-4, wherein: the battery device comprises a plurality of battery modules and a plurality of DC/DC converters which correspond to each other, and each battery module and each DC/DC converter are arranged in the shell;

the first side of each DC/DC converter is electrically connected with a corresponding battery module, and the second side of each DC/DC converter is connected in parallel with a common end; the electrical connector electrically connects the common terminal.