CN209418603U - A kind of power battery module structure - Google Patents

Abstract

A power battery module structure, including a casing, the casing is provided with a plurality of battery units, the battery unit includes a battery, a bracket for placing the battery, and the foam provided on the other side of the battery relative to the bracket, the described The bracket includes a bracket bottom plate and bracket side plates arranged around at least three sides of the bracket bottom plate. The bracket bottom plate is made of aluminum alloy, and the contact surface between the bracket side plate and the battery is made of plastic material. The utility model is simple to assemble, and provides an efficient heat dissipation path for the battery to work and dissipate heat; the bottom plate of the bracket can improve the heat dissipation efficiency of the battery and realize reliable mechanical protection for the battery, and the side plate of the bracket can prevent the battery from being worn and leaked; And the expansion space necessary for aging, prolonging the service life of the battery module; the heat-conducting silicone sheet quickly transfers the heat of the battery unit to the outside of the casing, improving the safety of the battery module.

Description

A power battery module structure

technical field

The utility model relates to the battery field, in particular to a power battery module structure.

Background technique

In the design of power lithium battery pack, it is necessary to combine multiple cells to form a module to meet the required voltage and discharge current specifications. Among them, the soft-packed battery is only covered by a layer of aluminum-plastic film, which has a low level of protection and is easily damaged by external impact. Therefore, in the process of designing and manufacturing power battery modules, a hard shell is required to provide protection for the soft-packed battery. Sufficient protection, so that it can meet the relevant reliability standards such as drop and vibration, but the existing battery brackets that fix the cells are generally protected by rigid metals. During transportation, the friction between the battery and the bracket is easy to cause Battery damage, leakage. At the same time, the discharge current of the power battery is large, which leads to high self-heating of the battery. If the temperature exceeds a certain range, it will cause great damage to the life and safety of the battery. Therefore, it is necessary to design the heat dissipation structure to discharge the battery at a high rate. The excess heat generated by itself is dissipated, so that the system can operate in a safe temperature environment, ensuring the safety and cycle life of the battery.

Utility model content

In order to overcome the above technical problems, the utility model provides a power battery module structure, the battery bracket has a good heat dissipation effect, and at the same time plays a good role in protecting the battery, and the battery is not easily damaged during transportation.

A power battery module structure, including a casing, the casing is provided with a plurality of battery units, the battery unit includes a battery, a bracket for placing the battery, and the foam provided on the other side of the battery relative to the bracket, the described The bracket includes a bracket bottom plate and bracket side plates arranged around at least three sides of the bracket bottom plate. The bracket bottom plate is made of aluminum alloy, and the contact surface between the bracket side plate and the battery is made of plastic material.

Preferably, the side plate of the bracket includes side plate 1 integrally formed with the bottom plate of the bracket and side plate 2 directly in contact with the battery, the side plate 1 is made of aluminum alloy, and the side plate 2 is made of plastic material, The second side plate is injection molded.

Preferably, the entire support side plate is made of plastic material.

Preferably, two positioning holes are respectively provided at both ends of the bracket, and the battery units are connected in series through positioning rods passing through the positioning holes.

Preferably, the inner surface of the positioning rod is provided with an internal thread, and the shell is provided with a bolt that passes through the shell and cooperates with the internal thread.

Preferably, at least one rib is provided on the outer surface of the positioning rod.

Preferably, the bracket is provided with a plug-in block, and the other side of the plug-in block is provided with a plug-in slot for matching with the plug-in block.

Preferably, a heat-conducting silicone sheet is provided between at least one surface of the side plate of the bracket and the shell.

Preferably, an adapter plate is provided between the bracket and the housing, and the adapter plate is provided with pads, connectors and lines, and the pads are electrically connected to the tabs of the battery.

Preferably, the casing is made of metal.

The utility model provides a power battery module structure, which is simple to assemble and easy to produce, and provides an efficient heat dissipation path for the battery to work and dissipate heat; It can improve the heat dissipation efficiency of the battery, and at the same time, the strength of the bottom plate of the bracket realizes reliable mechanical protection for the battery, and the side plate of the bracket can prevent the battery from wearing and leaking; the foam provides the necessary expansion space for the battery cycle and aging, prolonging the service life of the battery module ; The heat-conducting silicone sheet quickly transfers the heat of the battery unit to the outside of the casing, improving the safety of the battery module.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is an exploded view of the overall structure of the utility model;

Fig. 3 is an explosion diagram of the battery unit of the present invention;

Fig. 4 is the perspective view of the bracket of Embodiment 1 of the present utility model;

Fig. 5 is the sectional view of the bracket of Embodiment 1 of the present utility model;

Fig. 6 is a perspective view of a bracket of Embodiment 2 of the present utility model;

Fig. 7 is the sectional view of positioning bar of the present utility model

FIG. 8 is a schematic diagram of the adapter plate of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Embodiment 1: Referring to the accompanying drawings, a power battery module structure includes a casing 1, and a plurality of battery units 2 are arranged inside the casing 1. The battery unit 2 includes a battery 21 and a bracket 22 for placing the battery 21. The battery 21 is opposite to the bracket. 22 The foam 23 provided on the other side, the foam 23 makes the battery assembled and fixed in the bracket 22 well, and provides the necessary expansion space for the battery by being compressed; the shell 1 is made of metal, and the metal shell is the battery module The overall protection component, and the casing 1 can transfer excess heat generated during battery operation to the outside.

The bracket 22 includes a bracket bottom plate 4 and a bracket side plate 5 arranged around at least three sides of the bracket bottom plate. The bracket bottom plate 4 is made of aluminum alloy, and the contact surface between the bracket side plate 5 and the battery 21 is made of plastic material. In this embodiment, the bracket The side plate 5 includes a side plate 1 51 integrally formed with the support bottom plate 4 and a side plate 2 52 directly in contact with the battery, the side plate 1 51 is made of aluminum alloy, the side plate 2 52 is made of plastic material, and the side plate 2 52 is injection molded , stamping on the aluminum alloy plate to form the support bottom plate 4 and side plate one 51, and then carry out injection molding to form the side plate two 52, the side plate two 52 can directly contact the battery on the inner side of the side plate one 51, the bracket bottom plate 4 and the side plate one 51 because the use of aluminum alloy can improve the protection strength of the battery. The aluminum alloy material has a good heat dissipation effect. At the same time, the side plate 2 52 is in direct contact with the battery. Because the side plate 2 52 is made of plastic, it is less rigid than the metal material. The battery mold During transportation, the battery is not easy to be damaged by collision.

Both ends of the bracket 22 are respectively provided with two positioning holes 6, and the battery units 2 are connected in series through the positioning rods 7 passing through the positioning holes 6. The inner surface of the positioning rods 7 is provided with internal threads, and the casing 1 is provided with Bolts 8 with internal threads; at least one rib 71 is provided on the outer surface of the positioning rod 7, wherein the positioning rod 7 of the embodiment in the figure is provided with two symmetrical ribs 71, which can prevent the positioning rod from rolling, and there are two ribs in the figure ; The bracket 22 is provided with a plug-in block 9, and the other side of the plug-in block 9 is provided with a plug-in slot cooperating with the plug-in block, and the initial fixation between each battery unit is realized through the plug-in block 9 and the plug-in slot , and then all the battery cells are connected together through the positioning rod 7, which is firmly fixed and improves the safety of the battery during transportation.

A heat-conducting silica gel sheet 11 is provided between at least one surface of the bracket side plate 5 and the casing, and the heat-conducting silica gel 11 exports excess heat generated by the battery to the casing for heat dissipation, ensuring the safety of the battery module; The adapter plate 12 is provided with pads 121 , connectors 122 and lines. The pads 121 are electrically connected to the tabs of the battery 21 . Each battery unit 2 forms an electrical circuit through the adapter plate 12 .

Embodiment 2: Referring to accompanying drawing 6, this embodiment is basically the same as Embodiment 1, the difference is that the bracket side plate 5 is made of plastic material as a whole, the bracket bottom 4 is stamped and formed by aluminum alloy plate, and then injection molded on the bracket bottom plate 5 Forming the side plate of the bracket, the base plate 4 of the bracket is made of aluminum alloy, which can improve the protection strength of the battery. At the same time, the aluminum alloy material has a good heat dissipation effect. The side plate 5 of the bracket directly contacts with the battery. The rigidity is small, and the battery is not easily damaged by collision during the transportation of the battery module.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Although the utility model has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible for those skilled in the art to understand the aforementioned aspects. The technical solutions described in the embodiments are modified, or equivalent replacements are made to some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this implementation are included in the protection scope of the present utility model.

Claims (10)

1. A power battery module structure, including a housing (1), characterized in that: the housing (1) is provided with a plurality of battery units (2), and the battery units (2) include batteries (21 ), the bracket (22) for placing the battery, the foam (23) provided on the other side of the battery (21) relative to the bracket (22), the bracket (22) includes the bracket bottom plate (4) and at least the bracket bottom plate (4 ) the support side plate (5) arranged around three sides, the support bottom plate (4) is made of aluminum alloy, and the contact surface between the support side plate (5) and the battery (21) is made of plastic material. 2. A power battery module structure according to claim 1, characterized in that: the support side plate (5) includes side plate one (51) integrally formed with the support bottom plate (4) and directly connected to the battery The second side plate (52) is in contact, the first side plate (51) is made of aluminum alloy, the second side plate (52) is made of plastic material, and the second side plate (52) is injection molded. 3. A power battery module structure according to claim 1, characterized in that: the whole bracket side plate (5) is made of plastic material. 4. A power battery module structure according to claim 1, characterized in that two positioning holes (6) are provided at both ends of the support (22), and the battery unit (2) passes through The positioning rods (7) passing through the positioning holes (6) are connected in series. 5. A power battery module structure according to claim 4, characterized in that: the inner surface of the positioning rod (7) is provided with an internal thread, and the casing (1) is provided with a thread that passes through the casing and cooperates with the internal thread. bolts (8). 6. A power battery module structure according to claim 4 or 5, characterized in that at least one rib (71) is provided on the outer surface of the positioning rod (7). 7. A power battery module structure according to claim 1, characterized in that: the bracket (22) is provided with a plug-in block (9), and the other side of the plug-in block (9) is provided with a The plug-in block fits the plug-in slot of the installation. 8 . The power battery module structure according to claim 1 , characterized in that: a heat-conducting silicone sheet ( 11 ) is provided between at least one surface of the support side plate ( 5 ) and the casing ( 1 ). 9. A power battery module structure according to claim 1, characterized in that: an adapter plate (12) is provided between the bracket (22) and the casing (1), and the adapter plate (12) is provided with pads (121), connectors (122) and lines, and the pads (121) are electrically connected to the tabs of the battery (21). 10. The power battery module structure according to claim 1, characterized in that: the casing (1) is made of metal.