CN110609241A - A battery voltage sampling device and using method thereof - Google Patents

Abstract

The invention belongs to the technical field of batteries, and specifically relates to a battery voltage sampling device, which includes a voltage sampling circuit board, a battery fixing frame and a battery management system. The battery fixing frame is used to fix the battery, and the voltage sampling circuit board is integrated with a voltage sampling The battery management system is electrically connected to the battery through the voltage sampling circuit board, and the battery management system is used to detect the voltage of the battery. The voltage sampling circuit board is provided with a plurality of pads and a plurality of sampling terminals. Each of the pads is electrically connected to the sampling terminal through different wires. The sampling device is well fixed to the battery, and a voltage sampling circuit board is used instead of multiple connecting wires, which reduces the cost and improves the safety factor, sampling accuracy and production efficiency at the same time. In addition, a method for using the voltage sampling device is also provided to improve its working stability and efficiency.

Description

A battery voltage sampling device and using method thereof

technical field

The invention belongs to the technical field of batteries, and in particular relates to a battery voltage sampling device and a using method thereof.

Background technique

As the main driving force of the new energy industry, lithium batteries are mainly connected in series and parallel through battery brackets to form battery modules to meet various power supply needs. In the production process, in order to ensure that the lithium battery can meet the working needs, various performance tests need to be performed on the lithium battery before the lithium battery is put into use, and voltage sampling is a very important link.

Existing battery pack voltage sampling devices need to connect multiple connecting wires externally to multiple batteries for voltage sampling. Due to the internal space limitation of the battery module, multiple connecting wires must be brought together and fixed or gathered in the same wiring trough Wires are routed together to the external interface of the module, and the insulation and temperature resistance of the multiple connecting wires are limited. When the module fails and thermal runaway causes high-temperature electrolyte injection or even fire, the insulation layer of the multiple connecting wires cannot be avoided. When the wires are damaged, the short circuit between the wires will happen one after another, and the multiple connecting wires are easy to be entangled. When sampling, the connecting wires will generate heat when they are energized, and the heat transfer between multiple connecting wires will accelerate the insulation layer of the connecting wires. The damage of the battery leads to the occurrence of short circuit; at the same time, the positions of multiple batteries are not fixed, and they are easily disturbed by vibration during the test. It affects the production efficiency and is not conducive to the development of enterprises.

It can be seen from the above that the relevant technology needs to be improved urgently.

Contents of the invention

One of the purposes of the present invention is to provide a battery voltage sampling device for the deficiencies of the prior art, which can fix the battery well, and use a circuit board instead of multiple connecting wires, which reduces the cost and improves the safety factor and sampling precision and productivity.

To achieve the above object, the present invention adopts the following technical solutions:

A battery voltage sampling device, comprising a voltage sampling circuit board, a battery fixing frame and a battery management system, the battery fixing frame is used to fix the battery, the voltage sampling circuit board is integrated with a voltage sampling circuit, and the battery management system passes through the The voltage sampling circuit board is electrically connected to the battery, and the battery management system is used to detect the voltage of the battery. The voltage sampling circuit board is provided with a plurality of pads and a plurality of sampling terminals, and a plurality of pads are connected through different wires. It is electrically connected with the sampling terminal. In the work, fix multiple batteries in the battery holder first, then set the voltage sampling circuit board cover on the side of the battery holder, and then connect the pads and the battery connecting pieces through wires one by one by welding. Finally, multiple sampling terminals are electrically connected to the battery management system through data lines to collect voltage information. The sampling device is well fixed to the battery, and the voltage sampling circuit board is used instead of multiple connecting lines, which reduces the cost and improves the safety factor. , sampling accuracy and production efficiency.

As an improvement of the battery voltage sampling device of the present invention, a plurality of the pads are spaced apart from each other and evenly distributed on the voltage sampling circuit board. This structural design is beneficial to avoid short circuit.

As an improvement of the battery voltage sampling device of the present invention, the plurality of sampling terminals are electrically connected to the battery management system through data lines. This structural design is beneficial to obtain the voltage information of multiple batteries through the battery management system.

As an improvement of the battery voltage sampling device according to the present invention, the battery fixing frame includes a bracket body and a connecting portion and an accommodating portion arranged on the bracket body, and a plurality of the accommodating portions are distributed in an array The bracket body, the connecting portion is surrounded by a plurality of the accommodating portions, and the accommodating portion includes a first through hole and a clip corresponding to the first through hole; the connecting portion includes a connecting column and a second through hole. Two through holes, the connecting column is arranged on the bracket body, and the second through hole penetrates through the connecting column and the bracket body at the same time. During work, a single battery is placed in the first through hole, the clamping plate resists the battery to prevent the battery from slipping out from the other end of the first through hole, and the two bracket bodies are combined together, which can be clamped at the same time A plurality of single batteries are assembled into a single battery pack; a plurality of single battery packs are close together so that the second through holes on different battery packs are coaxial, and then a screw rod is used to pass through multiple second through holes and fixed with bolts , thereby forming a high-power power supply battery to meet the demand for high-power power supply. The battery fixing frame has multiple fixing methods, and is simple in structure, easy to use, and strong in practicability.

As an improvement of the battery voltage sampling device of the present invention, the connecting column is integrally formed with the bracket body. This structural design is beneficial to increase the firmness of the connection between the connecting column and the bracket body.

As an improvement of the battery voltage sampling device of the present invention, the cross-sectional shape of the first through hole is at least one of semicircle, circle, sector and polygon. In operation, the first through hole is used to accommodate a single battery; in practical applications, the shape of a single battery is cylindrical or cubic. For the stability of work, the cross-sectional shape of the first through hole is adjusted according to the cross-sectional shape of the battery. Design, can be flexibly set according to the actual situation.

As an improvement of the battery voltage sampling device of the present invention, a plurality of the accommodating parts are distributed on the bracket body in at least one form of a linear array, a circular array and a rectangular array. In practical applications, the distribution modes of the accommodating parts can be designed in various ways, and can be flexibly set according to the working environment.

As an improvement of the battery voltage sampling device of the present invention, the clamping plate is arranged at the bottom of the first through hole. During operation, the clamping plate is used to resist the battery in the first through hole, preventing the battery in the first through hole from sliding out.

As an improvement of the battery voltage sampling device of the present invention, the cross-sectional shape of the clamping plate is at least one of semicircle, circle and polygon. In practical applications, the shapes of the pallets can be designed in various ways, and the number of pallets can also be designed in multiples, which can be flexibly set according to actual working conditions.

As an improvement of the battery voltage sampling device of the present invention, the number of the connecting parts is at least two. In practical application, the connection part is arranged at the edge area of the multiple accommodating parts, thereby avoiding the influence on the operation of the battery.

As an improvement of the battery voltage sampling device according to the present invention, the bracket body is further provided with a plurality of baffles and a plurality of third through holes, and the plurality of baffles are arranged around the accommodating portion, The third through hole is disposed between adjacent accommodating parts. The baffle is used to protect the battery and prevent the battery from being impacted by external forces; the battery generates a lot of heat when it is working, and the third through hole is used for heat dissipation, while saving materials and helping to reduce the weight of the bracket body.

As an improvement of the battery voltage sampling device of the present invention, the different baffles are respectively provided with locking protrusions and locking slots. In actual work, the two bracket bodies are combined with a plurality of batteries sandwiched between them. At this time, the protrusions and slots on the two bracket bodies are engaged respectively, which is beneficial to increase the stability of the battery pack structure.

As an improvement of the battery voltage sampling device of the present invention, the cross-sectional shape of the third through hole is at least one of semicircle, circle, sector and polygon. In practical applications, the shape of the third through hole can be designed in various ways, and can be flexibly set according to actual conditions.

The second object of the present invention is to provide a method for using a battery voltage sampling device to improve the working stability and efficiency of the device.

In order to achieve the above object, the present invention provides a method for using a battery voltage sampling device, comprising the following steps:

S1, fixing multiple batteries in the battery holder;

S2. Set the cover of the voltage sampling circuit board on the side of the battery holder;

S3. Connecting the pads and the battery connecting pieces electrically through wires in one-to-one correspondence by welding;

S4. Electrically connect multiple sampling terminals to the battery management system through data lines to collect voltage information.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a three-dimensional structural schematic diagram in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a battery fixing frame fixing a battery in an embodiment of the present invention;

FIG. 3 is a three-dimensional structural schematic diagram of a battery holder in an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a top view in Fig. 3;

5 is a schematic structural diagram of circuit connections in an embodiment of the present invention;

6 is a schematic structural diagram of the circuit connection of the voltage sampling circuit board in the embodiment of the present invention;

Fig. 7 is the schematic diagram of the circuit when the voltage sampling circuit board is working in the embodiment of the present invention;

Among them: 1-voltage sampling circuit board; 11-welding pad; 12-sampling terminal; 2-battery fixing frame; 21-bracket body; 22-connecting part; 221-connecting column; 231-first through hole; 232-card board; 24-baffle plate; 241-card protrusion; 242-card slot; 25-third through hole; 3-battery management system; 4-single battery.

Detailed ways

Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal" etc. are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to this invention. Invention Limitations.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The present invention will be described in further detail below in conjunction with the accompanying drawings, but it is not intended to limit the present invention.

Example 1

As shown in Figure 1-7, a battery voltage sampling device includes a voltage sampling circuit board 1, a battery fixing frame 2 and a battery management system 3, the battery fixing frame 2 is used to fix the battery, and the voltage sampling circuit board 1 is integrated with a voltage sampling circuit, the battery management system 3 is electrically connected to the battery through the voltage sampling circuit board 1, the battery management system 3 is used to detect the voltage of the battery, the voltage sampling circuit board 1 is provided with a plurality of pads 11 and a plurality of sampling terminals 12, and a plurality of solder The discs 11 are electrically connected to the sampling terminals 12 through different wires. During work, first fix a plurality of batteries 4 in the battery fixing frame 2, then cover the voltage sampling circuit board 1 on the side of the battery fixing frame 2, and then connect the pads 11 and the battery connecting pieces through wires by welding. A corresponding electrical connection, and finally a plurality of sampling terminals 12 are electrically connected to the battery management system 3 through data lines to collect voltage information. Cost, while improving the safety factor, sampling accuracy and production efficiency.

Preferably, a plurality of pads 11 are spaced apart from each other and evenly distributed on the voltage sampling circuit board 1 . This structural design is beneficial to avoid short circuit.

Preferably, the plurality of sampling terminals 12 are electrically connected to the battery management system 3 through data lines. This structural design is beneficial to obtain the voltage information of multiple batteries through the battery management system.

Preferably, the battery holder 2 includes a bracket body 21 and a connecting portion 22 and an accommodating portion 23 provided on the bracket body 21, a plurality of accommodating portions 23 are distributed in an array on the bracket body 21, and the connecting portion 22 is surrounded by a plurality of accommodating portions. part 23, the accommodating part 23 includes a first through hole 231 and a clamping plate 232 corresponding to the first through hole 231; The two through holes 222 pass through the connecting column 221 and the bracket body 21 at the same time. In operation, a single battery 4 is placed in the first through hole 231, and the clamping plate 232 resists the battery to prevent the battery from slipping out from the other end of the first through hole 231, and the two bracket bodies 21 are put together, Wherein a plurality of single batteries 4 can be clamped at the same time, thereby assembled into a single battery 4 groups; a plurality of single battery 4 groups are close together, so that the second through holes 222 on different battery groups are coaxial, and then pass through multiple groups with a screw. A second through hole 222 is fixed with bolts to form a high-power power supply battery to meet the demand for high-power power supply. The bracket has multiple fixing methods, and is simple in structure, easy to use, and strong in practicability.

Preferably, the connecting column 221 is integrally formed with the bracket body 21 . This structural design is beneficial to increase the firmness of the connection between the connecting column 221 and the bracket body 21 .

Preferably, the cross-sectional shape of the first through hole 231 is at least one of semicircle, circle, sector and polygon. In operation, the first through hole 231 is used to accommodate a single battery 4; in practical applications, the shape of a single battery 4 has a cylinder or a cube, for the stability of the work, the cross-sectional shape of the first through hole 231 is according to the battery It can be designed flexibly according to the actual situation.

Preferably, the plurality of accommodating portions 23 are distributed on the bracket body 21 in at least one form of a linear array, a circular array and a rectangular array. In practical applications, the distribution of the accommodating parts 23 can be designed in various ways, and can be flexibly set according to the working environment.

Preferably, the clamping plate 232 is disposed at the bottom of the first through hole 231 . During operation, the clamping plate 232 is used to resist the battery in the first through hole 231 and prevent the battery in the first through hole 231 from sliding out.

Preferably, the cross-sectional shape of the clamping plate 232 is at least one of semicircle, circle and polygon. In practical applications, the shapes of the clamping plates 232 can be designed in various ways, and the number of clamping plates 232 can also be designed in multiples, which can be flexibly set according to actual working conditions.

Preferably, the number of connecting parts 22 is at least two. In practical application, the connecting portion 22 is disposed at the edge area of the plurality of accommodating portions 23, thereby avoiding the influence on the operation of the battery.

Preferably, the bracket body 21 is also provided with a plurality of baffles 24 and a plurality of third through holes 25, the plurality of baffles 24 are arranged around the accommodating portion 23, and the third through holes 25 are arranged in the adjacent accommodating portion 23 between. The baffle 24 is used to protect the battery and prevent the battery from being impacted by external forces; the battery generates a lot of heat when it is working, and the third through hole 25 is used for heat dissipation, saving materials and reducing the weight of the bracket body 21 .

Preferably, different baffles 24 are respectively provided with locking protrusions 241 and locking grooves 242 . In actual work, the two bracket bodies 21 are combined, and a plurality of batteries are clamped in the middle. At this time, the protrusions 241 and the slots 242 on the two bracket bodies 21 are respectively engaged, which is beneficial to increase the structure of the battery pack. stability.

Preferably, the cross-sectional shape of the third through hole 25 is at least one of semicircle, circle, sector and polygon. In practical applications, the third through hole 25 can be designed in various shapes, and can be flexibly set according to actual conditions.

The working principle of the present invention is: in operation, a single battery 4 is placed in the first through hole 231, and the clamping plate 232 resists the battery to prevent the battery from sliding out from the other end in the first through hole 231, and the two When the bracket bodies 21 are put together, the protrusions 241 and slots 242 on the two bracket bodies 21 are engaged respectively, which is beneficial to increase the stability of the battery pack structure, wherein multiple single batteries 4 can be clamped at the same time, thereby being assembled into 4 sets of single batteries; multiple sets of 4 single batteries are closely connected together so that the second through holes 222 on different battery sets are coaxial, and then a screw rod is used to penetrate through multiple second through holes 222 and fixed with bolts, thus forming a High-power power supply battery to meet the demand for high-power power supply, the baffle 24 is used to protect the battery, to avoid the battery from being impacted by external forces; the battery will generate a lot of heat when it is working, the third through hole 25 is used for heat dissipation, and saves materials at the same time, which is beneficial Reduce the weight of the bracket body 21, the bracket has a variety of fixing methods, and is simple in structure, easy to use, and strong in practicability; in work, first fix a plurality of batteries in the battery fixing frame 2, and then connect the voltage sampling circuit board 1 The cover is set on the side of the battery fixing frame 2, and then the pads 11 are electrically connected to the battery connecting piece through wires by welding, and finally a plurality of sampling terminals 12 are electrically connected to the battery management system 3 through data lines to collect data. Voltage information, the sampling device is well fixed to the battery, and the voltage sampling circuit board is used instead of multiple connecting wires, which reduces the cost and improves the safety factor, sampling accuracy and production efficiency.

Example 2

As shown in Figures 1-7, a method for using the battery voltage sampling device of Embodiment 1 includes the following steps:

S1. Fix a plurality of batteries 4 in the battery fixing frame 2; in practical applications, place a plurality of single batteries 4 in the first through hole 231, and the clamping plate 232 resists the batteries to prevent the batteries from passing through the first through hole 231. The other end in the hole 231 is slid out, and the two bracket bodies 21 are put together, and the protrusions 241 and the slots 242 on the two bracket bodies 21 are engaged respectively, which is beneficial to increase the stability of the battery pack structure, wherein Clamp a plurality of single batteries 4 at the same time, thereby assembling into 4 sets of single batteries; close together 4 sets of multiple single batteries so that the second through holes 222 on different battery sets are coaxial, and then pass through the plurality of first through holes 222 with screws Two through holes 222 are fixed with bolts to form a high-power power supply battery;

S2. Cover the voltage sampling circuit board 1 on the side of the battery holder 2; in practical applications, the size of the voltage sampling circuit board is close to the size of the side of the battery holder 2, so as to sample the battery voltage;

S3. The pad 11 is electrically connected to the battery connecting piece through a wire in one-to-one correspondence by welding; in practical applications, it is connected by spot welding or soldering to increase the stability of the connection;

S4. Electrically connect multiple sampling terminals 12 to the battery management system 3 through data lines to collect voltage information. The voltage information of multiple batteries 4 can be obtained through the battery management system.

The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications, and environments can be made within the scope of the inventive concept described herein, by the above teachings or by skill or knowledge in the relevant field. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

Claims (10)

1. A battery voltage sampling device, characterized in that: it comprises a voltage sampling circuit board (1), a battery fixing frame (2) and a battery management system (3), and the battery fixing frame (2) is used to fix the battery, so The voltage sampling circuit board (1) is integrated with a voltage sampling circuit, the battery management system (3) is electrically connected to the battery through the voltage sampling circuit board (1), and the battery management system (3) is used to detect the battery voltage, the voltage sampling circuit board (1) is provided with a plurality of pads (11) and a plurality of sampling terminals (12), and a plurality of pads (11) are connected to the sampling terminals (12) through different wires electrical connection. 2. The battery voltage sampling device according to claim 1, characterized in that: a plurality of said pads (11) are spaced apart from each other and evenly distributed on said voltage sampling circuit board (1). 3. The battery voltage sampling device according to claim 1, characterized in that: a plurality of the sampling terminals (12) are electrically connected to the battery management system (3) through data lines. 4. The battery voltage sampling device according to claim 1, characterized in that: the battery fixing frame (2) includes a bracket body (21), a connecting portion (22) and a container set on the bracket body (21) a set portion (23), a plurality of the accommodating portions (23) are distributed in an array on the bracket body (21), the connecting portion (22) is surrounded by a plurality of the accommodating portions (23), the The accommodating part (23) includes a first through hole (231) and a clamping plate (232) corresponding to the first through hole (231); the connecting part (22) includes a connecting post (221) and a second through hole A hole (222), the connecting column (221) is arranged on the bracket body (21), and the second through hole (222) penetrates both the connecting column (221) and the bracket body (21). 5. The battery voltage sampling device according to claim 4, characterized in that: the connecting column (221) is integrally formed with the bracket body (21). 6. The battery voltage sampling device according to claim 4, characterized in that: a plurality of said accommodating parts (23) are distributed in said bracket body ( twenty one). 7. The battery voltage sampling device according to claim 4, characterized in that: the clamping plate (232) is arranged at the bottom of the first through hole (231). 8. The battery voltage sampling device according to claim 4, characterized in that: the bracket body (21) is also provided with a plurality of baffles (24) and a plurality of third through holes (25), a plurality of the The baffle (24) is arranged around the accommodating part (23), and the third through hole (25) is arranged between adjacent accommodating parts (23). 9. The battery voltage sampling device according to claim 8, characterized in that: different said baffles (24) are respectively provided with locking protrusions (241) and locking slots (242). 10. A method for using a battery voltage sampling device, comprising the following steps: S1, fixing a plurality of batteries (4) in the battery fixing frame (2); S2. Cover the voltage sampling circuit board (1) on the side of the battery holder (2); S3. By welding, the pad (11) is electrically connected to the battery connecting piece through wires one by one; S4. Electrically connect multiple sampling terminals (12) to the battery management system (3) through data lines to collect voltage information.